Question

Consider all possible isomeric ketones including stereoisomers of MW = 100. All these isomers are independently reacted with $NaB{H}_4$. The total number of ketones that gives a racemic product(s) is/are___

Answer 1

Molecular weight of the ketone is 100
So, molecular formula $=C_6{H}_{12}O$
Degree of unsaturation $=(6+1)-\frac{12}{2}=1$
According to question, compound contains ketone group. Since, the compound which contain chiral centre lead to the formation of diastereomer while other produces enantiomers. Various isomers and their possible reduced product are as shown below.