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Draw a six-carbon alkyne that can exist as diastereomers. (The molecule should contain only carbon and...

Draw a six-carbon alkyne that can exist as diastereomers. (The molecule should contain only carbon and hydrogen atoms.)

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Concepts and reason

Stereochemistry deals with the spatial arrangement of atoms. The difference between the relative spatial positions of the atoms is called stereoisomers. Enantiomer and diastereomers are two types of stereoisomers.

Fundamentals

• Enantiomers: Enantiomers are stereo isomers, which are non-superimposable mirror images.

Isomers are mirror images but not superimposable.

• Diastereomers: Diastereomers are stereo isomers, which are non-superimposable and non-mirror images. Isomers are neither super imposable nor mirror images.

The skeleton structure:

CCCCC{\rm{C}}\, - {\rm{C}} - \,{\rm{C}} - \,{\rm{C}} - \,{\rm{C}}

CCC=CC{\rm{C}}\, \equiv {\rm{C}}\, - {\rm{C = }}\,{\rm{C}} - \,{\rm{C}}

The triple bond should be in terminal position but the double bond should not be in the terminal position.

The molecule which can exist as diastereomers is as follows:

HC=C—Ç=f-CH3
CH3

Ans:

The structure of alkyne that can exist as diastereomers is as follows:

HC=C—Ç=f-CH3
CH3

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