Question

Meso-tartaric acid is formed in

• A. $\left(I\right),\left(II\right),\left(V\right)$
• B. $\left(III\right),\left(IV\right),\left(VI\right)$
• C. $\left(I\right),\left(II\right),\left(IV\right)$
• D. $\left(III\right),\left(IV\right),\left(V\right)$

Answer 1

Answer: (B)

$\left(III\right),\left(IV\right),\left(VI\right)$

Meso-tartaric acid is formed in reactions (III), (IV), (VI). Two -OH groups are added to carbon carbon double bond. The addition is anti.
(iii) When fumaric acid is treated with $PhCOOOH/H_{2}O$ meso tartaric acid is obtained.
(iv) When fumaric acid is treated with $MMPP+C_2{H}_{5}OH/H_{2}O$ meso tartaric acid is obtained.
(vi) When fumaric acid is treated with $H_2{O}_2/Se{O}_2$ meso tartaric acid is obtained.