question_answer

Acyclic stereoisomer having the molecular formula\[{{C}_{4}}{{H}_{7}}Cl\]are classified and tabulated. Find out the correct set of numbers.

A)

Geometrical	Optical
6	2

B)

Geometrical	Optical
4	2

C)

Geometrical	Optical
6	0

D)

Geometrical	Optical
4	0

E)

Geometrical	Optical
5	2

Correct Answer: A

Solution :

The acyclic stereoisomers of\[{{C}_{4}}{{H}_{7}}Cl\]are \[\left. C{{H}_{2}}=CH-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  |                                                               \end{smallmatrix}}{\mathop{{{C}^{*}}}}}\,-C{{H}_{3}} \right\}2\,optical\,isomers.\] Number of optical isomers \[={{2}^{n}}={{2}^{1}}=2\] Hence, total number of geometrical isomers\[=6\] Total number of optical isomers\[=2\]