We have seen that NaH is a strong base but a weak nucleophile. In contrast, lithium aluminum hydride (LAH) is a reagent that can serve as a source of nucleophilic hydride ion:

In this case, LAH functions as a delivery agent of a nucleophilic hydride ion. We will see this reagent in many upcoming chapters. Explain why LAH is capable of functioning as a strong nucleophile while NaH is not.

Transcribed Image Text:

Lie Н H-Á-H Br Н LAH