Consider the two trials shown below and provide structures for the products formed: Trial 1 Trial 2 Trial 3 Trial NaBH4 CH3OH NaBH4 CH3OH NaBH4 CH3OH A. Explain why trial 2 took less time than trial 1 to form product. B. Explain why trial 3 did not form any product. Results One product- reaction time 1 minute One product- reaction time 30 seconds No reaction after 5 minutes

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Reactions at the Alpha Carbon Atom

The position next to the ketone or aldehyde functional group is termed as alpha position and the reaction which occurs at alpha position is called alpha substitution reaction. In an alpha substitution reaction, the alpha proton atom is substituted by an electrophile by the formation of an enol intermediate or enolate ion intermediate. Most of the carbonyl compounds go through an alpha substitution reaction.