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Consider all possible isomeric ketones including stereoisomers of MW=100, All  these isomers are independently reacted with NaBH₄ (Note stereoisomers are also  reacted separately.) The total number of ketones that give a racemic product (s)  is/are

Answer:

Explanation:

The molecular weight of the ketones is 100. So, molecular  formula = C6H₁₂O

Degree of unsaturation =(6+1)-12/2=1

  According to question compound contains ketone group. Since the compound which contains chiral centre lead to the formation of diastereomer while other produces enantiomers. Various isomers and their possible reduced product are as shown below.

 While in case of (4) and (5)  they do not product enantiomer due to presence of stereogenic centre on ketone