When camphor undergoes nucleophilic attack by CH₃CH₂MgBr, the major product is the one in which the Grignard reagent has added endo. Explain the stereoselectivity observed. Which face of the carbonyl carbon, re or si, was attacked?

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The Answer of When camphor undergoes nucleophilic attack by CH₃CH₂MgBr, the major product is the one in which the Grignard reagent has added endo. Explain the stereoselectivity observed. Which face of the carbonyl carbon, re or si, was attacked?

When Camphor Undergoes Nucleophilic Attack by CH3CH2MgBr, the Major Product

When Camphor Undergoes Nucleophilic Attack by CH₃CH₂MgBr, the Major Product