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Standard XII

Chemistry

Addition Reactions

Which of the ...

Question

Which of the following statment regarding D is correct?

It is a conjugated dience

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It has three methyl groups

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D on treatment with HBr/RooR produces a pair enantiomers

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D on heating with conc.

H_{2} S O_{4}

will isomerizes into a conjugated diene

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Solution

The correct option is A It is a conjugated dience
The compound D (2,3,4-trimethylpenta-1,3-diene) is conjugated diene. It has four methyl groups. On treatment with HBR/ROOR, it undergoes anti markovinikov rule and the product has 2 chiral centers and 2 pairs of enantiomers.
D is conjugated diene and on heating with conc. sulphuric acid will not isomerize.

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