Some Basic Principles Of Organic Chemistry Question 202

Question: Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable [IIT Screening 2005]

Options:

A) C,H2CH=CHCH=O,CH3

B) CH2=CH2C,HCH=O,CH3

C) C,H2C,HCH=CHOCH3

D) CH2=CHC,HC,HOCH3

Show Answer

Answer:

Correct Answer: C

Solution:

The octet of all atoms are complete in structures and .

In structure electron deficiency of positively charged carbon is duly compensated by lone pair electrons of adjacent oxygen atom while such neighbour group support is not available in structure .



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