Some Basic Principles Of Organic Chemistry Question 363

Question: The total number of acylic isomers including the stereoisomers with the molecular formula C4H7Cl [Pb. CET 2004]

Options:

A) 11

B) 12

C) 9

D) 10

Show Answer

Answer:

Correct Answer: B

Solution:

C4H7Cl is a monochloro derivative of C4H8 which itself exists in three isomeric forms.

(i) CH3CH2CH=CH2 : Its possible mono-chloro derivatives are : CH3CH2CH=CHCl 2 isomers : cis and trans forms CH3C,|,HCl ,CH=CH2 optically active (exists in two forms) ClCH2CH2CH=CH2 (one form) H3CCH2C|,=Cl ,CH2 (one form) (ii) CH3CH=CHCH3 : Its possible monochloro derivatives are : CH3CH=C|,Cl ,CH3 Exists in two geometrical forms CH3CH=CHCH2Cl Exists in two geometrical forms (iii) CH3C|,=CH2CH3     ,, : Its possible monochloro derivatives are CH3C|,=CHCH3    ,Cl Only one form ClCH2C|,=CH2CH3     ,, Only one form Thus, the total acylic isomers forms of C4H7Cl are 12.



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