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Question

The carbonyl compound producing an optically active product by reaction with LiAlH4 is

A
propnone
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B
butanone
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C
3- pentanone
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D
benzophenone
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Solution

The correct option is C butanone
Reactions:

A) H3CCOCH3LiAlH4−−−H3CCH(OH)CH3Optically Inactive

B) H3CCH2COCH3LiAlH4−−−H5C2CH(OH)CH3Optically Active

C) H3CCH2COCH2CH3LiAlH4−−−H5C2CH(OH)C2H5Optically Inactive

D) C6H5COC6H5LiAlH4−−−C6H5CH(OH)C6H5Optically Inactive

Hence, Option "B" is the correct answer.

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