How to convert wedge–dash structure into Fischer projection? [closed]








**Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers.
 
 






---








**Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/116271/edit).




Closed 4 years ago.








[Improve this question](/posts/116271/edit) 



I am very confused when a compound with more than one chiral centre is given. How to find whether the two compounds are enantiomers or diasteromers? 


Please also explain how to convert more than one chiral compound with wedge–dash structure to Fischer projection.




**Method 1**
[![enter image description here](https://i.stack.imgur.com/G8ial.png)](https://i.stack.imgur.com/G8ial.png)


**Method 2**


Quoting from 


<http://oscar.iitb.ac.in/OSCARPP/Chemistry/UploadedStoryboards/SCH023_3P0431Wedge-dash%20to%20Fischer.ppt>


The following is conversion of molecules with two chiral centres from wedge to fischer projection yhrough a series of operations as shown below.


[![enter image description here](https://i.stack.imgur.com/ZsKWp.png)](https://i.stack.imgur.com/ZsKWp.png)


**Reference :**


<http://oscar.iitb.ac.in/OSCARPP/Chemistry/UploadedStoryboards/SCH023_3P0431Wedge-dash%20to%20Fischer.ppt>


 6

How to find whether the two compounds are enantiomers or diasteromers?


**Diastereomers** are stereoisomers that are **not mirror images** of one another and are **non-superimposable** on one another.$\ce{^1}$


**Enantiomers** are chiral molecules that are **mirror images of one another**. Furthermore, the molecules are **non-superimposable** on one another. This means that the molecules cannot be placed on top of one another and give the same molecule.$\ce{^2}$


The figure below will explain.


Further in diastereomers only part of the molecule is a mirror reflection.(circled in the image) ,while the other stereo-center is identical.


NOTE:Geometrical isomers are also diasetreisomers , but achiral.In the examples given below Diastereomers are chiral.


[![enter image description here](https://i.stack.imgur.com/27XfS.png)](https://i.stack.imgur.com/27XfS.png)


References:


1. <http://www.chemeddl.org/resources/stereochem/definitions17.htm>


2.<http://www.chemeddl.org/resources/stereochem/definitions16.htm>


 0