Chapter 17, Problem 17.62P

Interpretation Introduction

Interpretation:

Among the two given hydride reducing agents ${\text{NaBH}}_{\text{4}}$ and ${\text{LiAlH}}_{\text{4}}$, the one that would be more selective toward direct addition to an alpha-beta unsaturated carbonyl compound is to be identified, and the reason for the selection is to be explained.

Concept introduction:

As the electronegativity of the metal atom in the metal-carbon bond decreases, the electronegativity difference between the metal and C atoms increases, resulting in a larger partial negative charge on C and greater reactivity.