# Question 1.IAT.8: How many stereoisomeric product (s) is/are formed when (±) l......

How many stereoisomeric product (s) is/are formed when (±) lactic acid is heated?

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$\begin{matrix} CH_3C & & & & COOH \\ & \diagdown & & \diagup & \\ & & C & & \\ & \diagup & & \diagdown & \\ H & & & & OH \end{matrix} + \begin{matrix} OH & & & & CH_3 \\ & \diagdown & & \diagup & \\ & & C & & \\ & \diagup & & \diagdown & \\ HOOC & & & & H \end{matrix} \quad \stackrel{\Delta}{\longrightarrow} \quad \\\\ \begin{matrix} H_3C & & & & CO & – & O & & & & CH_3 & \\ & \diagdown & & \diagup & & & & \diagdown & & \diagup & & \\ & & C & & & & & & C & & & \\ \\ & \diagup & & \diagdown & & & & \diagup & & \diagdown & & \\ H & & & & O & – & CO & & & & H & \\ & & & & (\pm) & & & & & & & \\ & & & & & & & & & & & \\ & & & & & & & & & & & \end{matrix} + \\ \begin{matrix} H_3C & & & & CO & – & O & & & & H & \\ & \diagdown & & \diagup & & & & \diagdown & & \diagup & & \\ & \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ C & & & &&& & C & & \\ & \diagup & & \diagdown & & & & \diagup & & \diagdown & & \\ H & & & & O & – & CO & & & & CH_3 & \\ & \text {(Meso)} & & & & & & & & & & \\ & & & & & & & & & & & \\ & & & & & & & & & & & \end{matrix}$

Three stereoisomers i.e., ((±)) lactide and (meso) lactide are formed when (±) lactic acid is heated.

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