The reactant is 3-methylpentanal. The reactio | vedclass

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(B) The starting material,$3$-methylpentanal,contains a chiral center at the $C-3$ position. When the nucleophilic addition of $CN^-$ occurs at the ca

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Diastereomers

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(B) The starting material,$3$-methylpentanal,contains a chiral center at the $C-3$ position. When the nucleophilic addition of $CN^-$ occurs at the carbonyl carbon (the $C-1$ position),a new chiral center is generated at $C-1$. Since the molecule already has a chiral center at $C-3$,the formation of a new chiral center at $C-1$ results in two possible configurations ($R$ or $S$) at this new center. These two resulting isomers have the same configuration at $C-3$ but different configurations at $C-1$,making them diastereomers. Therefore,the products are diastereomers.

The reactant is $3$-methylpentanal. The reaction with $NaCN$ followed by $H_2SO_4$ (cyanohydrin formation) is shown below:
$CH_3CH_2CH(CH_3)CH_2CHO \xrightarrow{NaCN/H^+} CH_3CH_2CH(CH_3)CH_2CH(OH)CN$
Products of the reaction are:

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The reactant is $3$-methylpentanal. The reaction with $NaCN$ followed by $H_2SO_4$ (cyanohydrin formation) is shown below:$CH_3CH_2CH(CH_3)CH_2CHO \xrightarrow{NaCN/H^+} CH_3CH_2CH(CH_3)CH_2CH(OH)CN$Products of the reaction are: