+H2C-PPh3 +:O-PPh3 ?? O2C , citrate synthase COA Co2 Acetyl coenzyme A Oxaloacet

Question

+H2C-PPh3 +:O-PPh3 ?? O2C , citrate synthase COA Co2 Acetyl coenzyme A Oxaloacetate Coenzyme A ester of citrate Step in the citric (tricarboxylic acid) cycle a - Electrophilic addition b = E2 Elimination c = SNI Nucleophilic substitution f= Carbonyl nucleophilic addn d = SN2 Nucleophilic substitution g = Nucleophilic subs at carbonyl(acyl Xfer) -Electrophilic aromatic substitution h = Conjugate (nucleophilic) addn Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters a - i for your answers more ArOun attemnts remalning

Explanation / Answer

1) f) carbonyl nucleophilic addition

Explanation: The nucleophilic part of the phosphonium ylide attacks the carbonyl carbon and produces alkene as product.

2) f) carbonyl nucleophilic addition

Explanation: carbanion attacks the carbonyl carbon and produces alcohol as product.

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