How many equivalents of hydride are you adding to vanillin in this reaction? HO

Question

How many equivalents of hydride are you adding to vanillin in this reaction?

HO NaBH4 +NaOH +H3BO3 H2O H3CO OH OH Vanillin Vanillyl Alcohol CS "Reduction'" commonly refers to the addition of hydrogen atoms, a loss of oxygen atoms, or both. In this reaction, a carbonyl compound is reduced as it gains two ydrogen atoms (from the reducing agent, sodium borohydride) to form an alecohol. Reductions using from the reducing agent, sodium borohydride) to form an alcohol. Reductions using sodium borohydride involve nucleopbilic addition of hydride ion (H-) to the carbonyl carbon without the formation of free hydride ions. A generalized balanced reaction of a borohydride reduction of a carbonyl compound is shown below. RO H +

Explanation / Answer

one equivalent of hydride are added to aldehyde to reduce to corresponding alcohol

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