The Cannizzaro reaction of PhCOCHO forms the product(s)

Question

The Cannizzaro reaction of PhCOCHO forms the product(s) (A) PhCOCH2OH+PhCOCOO- (B) PhCH(OH)(COO)- (C) PhCOO-+PhCOCH2OH (D) Both A and C

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-w67vvskq32lik4dt.jpg" /> In internal crossed-Cannizzaro reaction, -CHO is oxidised (because it has aldehydic H needed for hydride transfer). Keto group can only be reduced, and not oxidised in corssed-Cannizzaro reaction.

Q. The Cannizzaro reaction of PhCOCHO forms the product(s)

$P h COC H_{2} O H + P h COCO O^{-}$

$P h C H (O H) (COO)^{-}$

$P h CO O^{-} + P h COC H_{2} O H$

Both A and C

In internal crossed-Cannizzaro reaction, $- C H O$ is oxidised (because it has aldehydic H needed for hydride transfer). Keto group can only be reduced, and not oxidised in corssed-Cannizzaro reaction.

Q. The Cannizzaro reaction of PhCOCHO forms the product(s)

PhCOCH2​OH+PhCOCOO−

PhCH(OH)(COO)−

PhCOO−+PhCOCH2​OH

Both A and C

In internal crossed-Cannizzaro reaction, −CHO is oxidised (because it has aldehydic H needed for hydride transfer). Keto group can only be reduced, and not oxidised in corssed-Cannizzaro reaction.

$P h COC H_{2} O H + P h COCO O^{-}$

$P h C H (O H) (COO)^{-}$

$P h CO O^{-} + P h COC H_{2} O H$

In internal crossed-Cannizzaro reaction, $- C H O$ is oxidised (because it has aldehydic H needed for hydride transfer). Keto group can only be reduced, and not oxidised in corssed-Cannizzaro reaction.