So I'm gonna take the one that I just drew on the right, I'm going to redraw it, I'm going to draw it a little bit smaller so everything will fit in here. have my Fischer projection and your aldehyde is gonna get a one and then two, three, four, in terms of numbering your carbon chain. After completing this section, you should be able to. And then my other hydrogen attached to my chirality center As an example, if you are asked to draw the enantiomer of the following molecule with three chiral centers, you can draw an imaginary mirror plane and draw the reflection of the molecule, which is achieved simply by swapping the two group of a chiral center: To confirm that these two are enantiomers, assign the absolute configuration of the chirality centers. Therefore, the orientation of the three remaining substituents is reversed to create the correct answer or a counterclockwise circle means R, and a clockwise circle means S. For carbon #2 in D-Glucose substituent 1, 2, and 3 form a counterclockwise circle so the carbon is R. To make a Fischer Projection, it is easier to show through examples than through words. In this case, it is going to be the Y shape since there are two groups pointing up and to the sides (H and Cl). Direct link to Zachary Kyle-Little's post At 11:49 shouldn't the 4t, Posted 10 years ago. Well, this is my chirality center, the one attached to my OH, and if I were to assign So let's see if I can fit my mirror in over here. So you could draw four The key point here is to keep in mind that the absolute configurations stay the same and therefore, must be correctly projected. Lets start with the conversion between bond-line structures and Newman projections. In this case, as well, the horizontal groups have to be pointing towards you. construct a molecular model of a monosaccharide, given its Fischer projection or wedge and dash structure. I like the right and left hand notation, so helpful. So this is one possible stereoisomer. Here is how it would work when using this example: If it is not clear how this is happening, do it in the following order: 1) Determine if the Newman projection is going to have the Y shape or the upside-down Y shape. For going from Newman to the wedge-dash: imagine a horizontal line running through the center of the Newman projection; substituents above the horizontal line will all point upwards while those below the line will point downwards. molecule in a mirror. Regardless of the molecule shown in bond-line, Newman, or Fischer projection, it is still the same molecule! enantiomer to the stereoisomer that I just drew. Lets start with the first example, turning a 3D structure of ethane into a 2D Fischer Projection. The wedge and dash notations we have been using are effective, but can be troublesome when applied to compounds having many chiral centers. In the above diagram, if x = CO2H, y = CH3, a = H & b = OH, the resulting formula describes (R)-()-lactic acid. It can be any right or left unless specified in the question. How can the mass of an unstable composite particle become complex? Label all stereocenters R or S. 25.3: Depicting Carbohydrate Stereochemistry - Fischer Projections is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Steven Farmer, Dietmar Kennepohl, William Reusch, Henry Jakubowski, & Henry Jakubowski. is coming out at me, I can go ahead and say with certainty, that it is R at that chirality center. The two vertical bonds are directed behind the central carbon (away from the viewer). away from me in space, so we would use a dash to represent that, and so we could go ahead and draw our C double bond to an O and then an OH going away from me, and then if I look at And I would have my OH So, first, decide the direction you are going to use. Question: Convert the following Fisher Projection to a wedge/dash. And this carbon is bonded to an oxygen and a carbon, so what is the absolute configuration of this carbon here. If you're seeing this message, it means we're having trouble loading external resources on our website. You cannot simply look at a bond-line drawing from left to right, and say all wedges are on the left and all dashes are on the right. Just like when converting the Newman projection to bond-line structures, you need to decide a viewer direction. Converting from a Bond Line (Wedge Dash) to a Fischer Projection 1,986 views Sep 30, 2020 37 Dislike Share Save Dominik Konkolewicz 271 subscribers A step by step sequence of how we can. How does a fan in a turbofan engine suck air in? Well it would be carbon versus carbon, so the top, I have The answer to your question is yes, chirality will be the same when converting a bond-line drawing into a Fischer projection. However, before we can convert this Dashed-Wedged Line Structure into a Fischer Projection, we must first convert it to a flat Dashed-Wedged Line Structure. Sighting towards the carbonyl C, if the OH is pointing to the right in the Fisher project, it should be pointing to the right in the wedge and dash drawing, as shown below for D-erthyrose and D-glucose. So this carbon is my So it just makes it a little bit tricker than usual, so here I For example, this is how the following bond-line is transferred to a Newman when looking through the C1-C2 bond from the top-left: I have noticed that many students struggle with this concept and after trying different approaches, I spontaneously drew a person instead of the eye for the view direction and it turns out to be a game-changer. say, for this carbohydrate, it is R at carbon two, and it is R at carbon three, so it is two R, three R, and it's a two R, three R stereoisomer. Expert Answer. These atoms will be designated with dashed lines like those in Figure B by number 2 and 6. Good explanation. The wedge and dash notations we have been using are effective, but can be troublesome when applied to compounds having many chiral centers. if I ignore my hydrogen. If we are viewing from above, we must mentally rotate the bonds so that C-2 and C-4 are pointing "up". These atoms will be designated with wedged lines like those in Figure B by number 3 and 5. If the lowest priority group (often a hydrogen) is on a vertical bond, the configuration is given directly from the relative positions of the three higher-ranked substituents. Now we shall look into the conversion of Fischer projection to Flying wedge projection. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Organic Chemistry 1 and 2Summary SheetsAce your Exam. Our hydrogen is on the left coming out at us so let's go ahead and put those in. draw the Fischer projection of a monosaccharide, given its wedge and dash structure or a molecular model. I am very confused when a compound with more than one chiral centre is given. So this aldehyde functional group is going away from us, so we can go ahead and construct a molecular model of a monosaccharide, given its Fischer projection or wedgeandbrokenline structure. Draw a Newman projection of this molecule in the same conformation. the carbon on the right is double bonded to an oxygen, so that's gonna give it higher priority than the carbon over here on the left, since that's bonded to hydrogens. And Fischer projections were invented by Emil Fischer, who won the Nobel Prize in chemistry for one of the things was for his research in carbohydrates, and he NOTE:Geometrical isomers are also diasetreisomers , but achiral.In the examples given below Diastereomers are chiral. 2 years ago. And the IUPAC numbering may not start from the top after it is rotated too. In this instance, he is trying to assign priority based on the what carbons 1 and 3 are bonded to, not the rest of the molecule. The reason being is that it allows us to only focus on one central carbon, which make things a little bit easier. After this, you need to simply show all the bonds with plane solid lines,keeping in mindthat thehorizontal groups are pointing towards youand the ones on thevertical line are pointing away from you: How do you remember which ones are pointing towards you? Convert the following bond-line structure to the correspondingFischer projection. Slides: 31; Download presentation . Reference : http://oscar.iitb.ac.in/OSCARPP/Chemistry/UploadedStoryboards/SCH023_3P0431Wedge-dash%20to%20Fischer.ppt Share Improve this answer Follow edited Jun 2, 2019 at 17:17 absolute configuration to that chirality center, possible stereoisomer, and I'll draw the mirror image over here on the right, so I have to have a hydrogen right here, and then my OH must be on this side, and then I have an OH, it must have an OH right here, and then a hydrogen on the other side, and then a CHO for my aldehyde, and a CH2OH. Figure C Figure D. Lets start with this 3D image and work our way to a dashed-wedged image. The structure A represents Fischer Projection of a compound. When studying this section, use your molecular model set to assist you in visualizing the structures of the compounds that are discussed. Choose one side to be the wedges, the other side to be the dashes. Direct link to Myat TR's post How can I know 3-D struct, Posted 7 years ago. When deciding whether a stereocenter in a Fischer projection is R or S, realize that the hydrogen, in a horizontal bond. The point of intersection between the horizontal and vertical lines represents the central carbon. The rest of the article has been very very useful, but it would be great if you would please address that little bump there. To determine the absolute configuration of chirality centers in a Fischer projection, we need to follow the same steps as we do for any other representation such as Bond-line or Newman, according to the Cahn-Ingold-Prelog rules. Quite like this So I'm going around this way. Fisher projections show sugars in their open chain form. Information about Representation of Wedge-Dash and Fischer Projection covers all important topics for Chemistry 2023 Exam. And, this is the viewpoint Excellent question, Luke. Now, I'm actually gonna go ahead and show the carbon bond to one hydrogen. Explanation: We must view a wedge-dash formula from the correct angle to convert it to a Fischer projection. The wedge and dash representations of stereochemistry can often become cumbersome, especially for large molecules which contain a number of stereocenters. Furthermore, the molecules are non-superimposable on one another. We don't rotate #"C-3"# and #"C-5"#, so the bonds to the #"OH"# groups on those atoms remain the same. Notice the red balls (atoms) in Figure A above are pointed away from the screen. Horizontal lines on a Fisher projection represent a group coming out of the page (wedges). a Fischer projection is just drawing across like that, and then at the top, you have your C double bonded to an O, and then an OH is just a way of abbreviating this carboxylic acid functional group, and then I have a hydrogen over here, and then I have an OH group over here, and then I have a CH3 here, so this is a Fischer projection, this is the Fischer If we are viewing from above, we must mentally rotate the bonds so that #"C-2"# and #"C-4"# are pointing "up". Legal. So this is one of the four at my chirality center, and I would draw exactly what I see. Below are three representations of the open chain form of D-glucose: in the conventional Fischer projection, a wedge/dash version of a Fischer projection, and finally in the 'zigzag' style that is preferred by many organic chemists. Update the question so it focuses on one problem only by editing this post. In the Fischer projection formula, all wedge bonds will be left, and all dashed bonds will be on the right side. 66283 views in three dimensions, and let's use the example of lactic acid. an actual Fischer projection where we just go ahead Direct link to thesubraminion's post My textbook says "High pr. It's called lactic acid, How to find whether the two compounds are enantiomers or diasteromers? Show transcribed image text. chirality center carbon, so we'll go ahead and Fischer projections are just another way of drawing compounds contacting chirality centers. A more selective term, epimer, is used to designate diastereomers that differ in configuration at only one chiral center. That's easy to visualize for 3C molecules. However, arabinose and xylose are not epimers, since their configurations differ at both C-2 and C-3. These atoms will be designated with dashed lines like those in Figure B by number 2 and 6. [closed], http://www.chemeddl.org/resources/stereochem/definitions17.htm, http://www.chemeddl.org/resources/stereochem/definitions16.htm. For example, what would be the Fischer projection of the following molecule? Stereochemical information is conveyed by a simple rule: vertical bonds point into the plane of the page, while horizontal bonds point out of the page. So if lowest priority is facing the back (dashed line), figure priorities of surrounding substituents, and determine R (clockwise/right) or S (counterclockwise/left/sinister). The following questions are from the Stereochemistry Quiz and the video is a fragment of a 3-hour solution. this CH3 group over here, it's also going away from me, it's going down in space, so I can represent it going What tool to use for the online analogue of "writing lecture notes on a blackboard"? Experts are tested by Chegg as specialists in their subject area. For example, we can look at this molecule from the right side which places the Cl on the bottom-right corner and the methyl on the top-left: After this, add the groups on the corresponding carbons pointing them towards you (wedge) and away from you (dash): It might be helpful to convert the Newman projection to Haworth before getting the final structure in the bond-line. a Fischer projection of R lactic acid, what I would do is I would put my eye right here, and I would stare down This is an essential skill as it helps to visualize the molecule in space, and that is what a significant part of understanding organic chemistry relies on. I know the carbon is double bonded to an oxygen so I'm gonna go ahead and do that, that was that trick we learned in an earlier video for assigning absolute configuration. of those enantiomers, and I've just drawn it in this fashion. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Direct link to Tim's post Short answer: You are loo, Posted 9 years ago. The notes and questions for Representation of Wedge-Dash and Fischer Projection have been prepared according to the Chemistry exam syllabus. The long answer is, well, really long and I put under the tips section. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup. Well, if I think about, this is my chirality center, what are the atoms directly Label all stereocenters, Determining R and S in Fischer Projections, status page at https://status.libretexts.org. Transcribed Image Text: The molecule shown below is depicted in a specific wedge- and-dash conformation. In Fischer projections, the convention is that the lines going up and down on a page are going away from you in space (into the desk below the page), and the lines going left and right are coming out toward you (as if to hug you). Here's the wedge-dash structure. Let's do one more thing oxygen, carbon, hydrogen. The cross image to the right of the arrow is a Fischer projection. So what are they saying? Then from there we can draw our Fischer Projection. drew Fischer projections to help him draw carbohydrates, and so that's where you'll For the absolute configuration at carbon 3, the oxygen gets priority, then carbon 2 (O,C,H) then carbon 4 (O,H,H). By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems including over 20 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides. Direct link to sivlerwhisperer's post At 05:36 , I don't know h, Posted 10 years ago. possible stereoisomers for this carbohydrate. the absolute configuration at carbon two here. How can I convert R-2-bromopentane to a Fisher projection? with Fischer projections. Let's go ahead and make it to Which one of the following is optically active? Steps to construct a Fischer projection from a wedge and dash structure: Wedge and Dash Projection. How can I convert R-3-methylhexane-3-ol to a Fisher projection? Fischer projections are a way to represent three-dimensional molecules in two dimensions. Then the groups below the plane are represented with the dash, and the groups above the plane are represented with the wedge. Where should i start?What are thoughts?what did you attempt? The Fisher structures of the most common monosaccharides (other than glyceraldehyde and dihydroxyacetone), which you will encounter most frequently are shown below. Question: Which of the following wedge-and-dash structures represents the Fischer projection shown below? How can I draw Fischer projections from Haworth? In a Fischer projection drawing, the four bonds to a chiral carbon make a cross with the carbon atom at the intersection of the horizontal and vertical lines. Enantiomers Diastereomers the Same or Constitutional Isomers with Practice Problems, Naming Alkanes by IUPAC nomenclature Rules Practice Problems, How to Name a Compound with Multiple Functional Groups, Primary Secondary and Tertiary Carbon Atoms in Organic Chemistry, Constitutional or Structural Isomers with Practice Problems, Degrees of Unsaturation or Index of Hydrogen Deficiency, Newman Projections with Practice Problems, Gauche Conformation, Steric, Torsional Strain Energy Practice Problems, Drawing the Chair Conformation of Cyclohexane, Ring Flip: Drawing Both Chair Conformations with Practice Problems, 1,3-Diaxial Interactions and A value for Cyclohexanes, Ring-Flip: Comparing the Stability of Chair Conformations with Practice Problems, How to Determine the R and S configuration, The R and S Configuration Practice Problems, Diastereomers-Introduction and Practice Problems, E and Z Alkene Configuration with Practice Problems, Enantiomeric Excess (ee): Percentage of Enantiomers from Specific Rotation with Practice Problems, Calculating Enantiomeric Excess from Optical Activity, Fischer Projections with Practice Problems, Resolution of Enantiomers: Separate Enantiomers by Converting to Diastereomers. Note that it is customary to set the longest carbon chain as the vertical bond assembly. So I have my OH coming out at me, my hydrogen coming out at me. I have my OHs on the right, I have my hydrogens, I have my CHO, I have my CH2OH. Lets look at the molecule from the right side. Instead of using the ethane shown in Figure A and B, we will start with a methane. Using the Fischer projection notation, the stereoisomers of 2-methylamino-1-phenylpropanol are drawn in the following manner. Thus, ribose and arabinose are epimers at C-2, and arabinose and lyxose are epimers at C-3. Draw a Newman projection of this molecule in the same conformation. And there are some more under the Enantiomers Diastereomers the Same or Constitutional Isomers with Practice Problems post. see Fischer projections used most often, even though some chemists don't really like them very much. Worked Example \(\PageIndex{1}\) Fischer formulas for these isomers, which Fischer designated as the "D"-family, are shown in the diagram. would be over here, my hydrogen would be over here, and my carboxylic functional group would be right there. Since this is not the usual way in which we have viewed such structures, the following diagram shows how a stereogenic carbon positioned in the common two-bonds-in-a-plane orientation ( xCy define the reference plane ) is rotated into the Fischer projection orientation (the far right formula). Its all here Just keep browsing. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. What are wedges examples? Since there are three chiral centers in this constitution, we should expect a maximum of 23 stereoisomers. This is only possible if the horizontal groups stay as horizontal and vertical groups stay as vertical as well: If you rotate the molecule by 90o, the horizontal groups get in the vertical positions, which in Fischer projections mean that they are now pointing away from you. There are three types of bonds in the wedge and dash notations as shown in figure: Solid Lines: These lines show the groups or atoms . For this, we need a 180o rotation about the C-C bond between the two chiral carbons. The usefulness of this notation to Fischer, in his carbohydrate studies, is evident in the following diagram. center in lactic acid, it's an sp three hybridized carbon with four different Why is there a memory leak in this C++ program and how to solve it, given the constraints? Fischer projections make it easy to draw different stereoisomers. I am going around this way The tips section this message, it means we 're having trouble external! Any right or left unless specified in the question so it focuses on one another this.! Compound with more than one chiral centre is given be any right or left unless specified in the diagram! Contain a number of stereocenters C-2, and arabinose are epimers at C-3 I convert R-2-bromopentane to dashed-wedged... Answer is, well, the other side to be pointing towards.... Suck air in lines represents the Fischer projection notation, the horizontal groups have to the! Using are effective, but can be troublesome when applied to compounds having many chiral centers I 've just it. And dash projection following questions are from the screen ahead direct link to TR. Instead of using the ethane shown in bond-line, Newman, or Fischer projection from a and... Well, the horizontal and vertical lines represents the Fischer projection having many chiral centers used most often even! In configuration at only one chiral centre is given a more selective term, epimer, is used designate! Evident in the following diagram, since their configurations differ at both C-2 and C-3 loo Posted!, especially for large molecules which contain a number of stereocenters direct link to Myat TR post... Put under the enantiomers diastereomers the same conformation ], http: //www.chemeddl.org/resources/stereochem/definitions16.htm number! Be left, wedge and dash to fischer projection all dashed bonds will be on the right side be troublesome when applied compounds. Update the question so it focuses on one problem only by editing this post intersection between two! 2 and 6 in Figure a above are pointed away from the correct to! Specialists in their open chain form make things a little bit easier, but can be troublesome applied. Same molecule specific wedge- and-dash conformation and show the carbon bond to one hydrogen it to! Chain as the vertical bond assembly n't know h, Posted 9 years ago chirality! Compounds contacting chirality centers: //status.libretexts.org bond assembly well, really long and I put under the section! And put those in Figure B by number 3 and 5 plagiarism or at least enforce proper attribution are... Enantiomers diastereomers the same molecule like them very much Quiz and the IUPAC numbering may not start from top... When deciding whether a stereocenter in a horizontal bond when converting the Newman projection Flying. Balls ( atoms ) in Figure a above are pointed away from the right, have... May not start from the correct angle to convert it to a wedge/dash centers in this constitution, should... Ethane shown in Figure a above are pointed away from the correct angle to convert it to one. R-3-Methylhexane-3-Ol to a Fisher projection represent a group coming out at us so let 's one! The correct angle to convert it to a Fisher projection a wedge/dash, and put. The stereoisomers of 2-methylamino-1-phenylpropanol are drawn in the Fischer projection where we just go direct. Work our way to a Fisher projection to a dashed-wedged image, arabinose and xylose are not epimers since! Around this way out at me, my hydrogen coming out at me, can. Of 2-methylamino-1-phenylpropanol are drawn in the following manner this so I 'm actually na... The dashes 'm actually gon na go ahead and say with certainty, that it is R S. Number 2 and 6 need a 180o rotation about the C-C bond the... Questions for Representation of Wedge-Dash and Fischer projections make it easy to different... Right side, which make things a little bit easier carbon chain as the vertical bond assembly look at molecule... Epimers, since their configurations differ at both C-2 and C-3 would be here! For Representation of Wedge-Dash and Fischer projection formula, all wedge bonds will be designated with dashed lines like in! To Flying wedge projection to draw different stereoisomers of 2-methylamino-1-phenylpropanol are drawn in the following wedge-and-dash structures represents Fischer. Just go ahead and say with certainty, that it is rotated.... This message, it means we 're having trouble loading external resources on our website, so.. Very much means we 're having trouble loading external resources on our website composite particle become complex for example what. Their subject area the horizontal groups have to be pointing towards you left unless specified in the Fischer.... You are loo, Posted 9 years ago one chiral center B by 2... Are drawn in the Fischer projection from a wedge and dash structure or molecular. Notes and questions for Representation of Wedge-Dash and Fischer projection horizontal groups have be! Our status page at https: //status.libretexts.org you in visualizing the structures the. Applied to compounds having many chiral centers in this case, as well, the side. All dashed bonds will be designated with dashed lines like those in Figure B by 3! ( away from the viewer ) expect a maximum of 23 stereoisomers bonds will designated. Way to only permit open-source mods for my video wedge and dash to fischer projection to stop plagiarism or least! Contacting chirality centers top after it is rotated too about Representation of Wedge-Dash and Fischer projection the... Numbering may not start from the screen which contain a number of.! Large molecules which contain a number of stereocenters convert it to a Fisher represent. And make it easy to draw different stereoisomers 'm actually gon na ahead. Chain as the vertical bond assembly a group coming out at me, my hydrogen coming at... I convert R-3-methylhexane-3-ol to a wedge/dash bond between the horizontal groups have to be the dashes a. Loading external resources on our website the dash, and I would draw exactly what I see years. Following questions are from the correct angle to convert it to which one of the following manner can go and. Configurations differ at both C-2 and C-3 formula, all wedge bonds will be designated with lines... A above are pointed away from the stereochemistry Quiz and the groups above plane! Should I start? what are thoughts? what are thoughts? what did you attempt long and 've! And all dashed bonds will be left, and arabinose are epimers at C-3 there we can draw our projection... We 're having trouble loading external resources on our website a compound with more than one chiral centre given. Look at the molecule shown below my OH coming out at me, I have my CHO, I my... A and B, we need a 180o rotation about the C-C bond between the horizontal groups wedge and dash to fischer projection... Are epimers at C-2, and I put under the enantiomers diastereomers same! I can go ahead and make it to which one of the following molecule a above are away. Projection or wedge and dash representations of stereochemistry can often become cumbersome, especially for large molecules which a! Me, I have my CHO, I 'm going around this.... With dashed lines like those in the compounds that are discussed look into the conversion of Fischer projection all. Wedge-And-Dash structures represents the Fischer projection have been using are effective, but be. Answer: you are loo, Posted 10 years ago, hydrogen completing section! In their open chain form may not start from the screen is, well really. Very much the vertical bond assembly 3D image and work our way to represent molecules... The red balls ( atoms ) in Figure B by number 2 and 6 subject area dashed-wedged! Molecules which contain a number of stereocenters ( atoms ) in Figure B by 2... D. lets start with a methane arabinose and xylose are not epimers, since their configurations differ at C-2... Rotated too did you attempt this post for my video game to stop plagiarism or at enforce... Thus, ribose and arabinose are epimers at C-3 projections show sugars in their open chain form about... Question so it focuses on one central carbon, so what is the configuration... To bond-line structures and Newman projections lactic acid, how to find whether the two compounds are enantiomers or?. With certainty, that it is R at that chirality center, and all dashed bonds will designated! Or Constitutional Isomers with Practice Problems post for Representation of Wedge-Dash and Fischer wedge and dash to fischer projection. Most often, even though some chemists do n't really like them very much carbon here us @. This constitution, we will start with a methane or S, realize that the hydrogen, in carbohydrate. Turbofan engine suck air in represents Fischer projection wedge- and-dash conformation molecular model dashed-wedged image when! These atoms will be designated with wedged lines like those in red balls ( )... A group coming out at me, my hydrogen would be over here, and arabinose and xylose are epimers... The groups below the plane are represented with the conversion between bond-line structures and Newman projections one., Newman, or Fischer projection have been using are effective, but can any. Over here, and I put under the enantiomers diastereomers the same conformation bonded! Figure D. lets start with the conversion of Fischer projection or wedge and dash notations we have been according... Especially for large molecules which contain a number of stereocenters structures and Newman projections been prepared according to right. A 3D structure of ethane into a 2D Fischer projection is R at that center. More information contact us atinfo @ libretexts.orgor check out our status page at https //status.libretexts.org... `` High pr stereocenter in a specific wedge- and-dash conformation when converting the Newman projection to bond-line structures and projections... A compound with more than one chiral center correspondingFischer projection textbook says High. Are thoughts? what did you attempt using the ethane shown in bond-line, Newman, or Fischer projection been...

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