Problem: The first two steps in the base-catalyzed condensation of acetaldehyde would be described as  A) attack of  –OH on the carbonyl carbon atom, then loss of water.  B) attack of  –OH on the carbonyl carbon atom, then the resultant anion attacks the carbonyl atom on a second molecule of acetaldehyde. C) –OH abstracts an α-hydrogen, then the resultant anion attacks the carbonyl carbon atom on a second molecule acetaldehyde. D) –OH abstracts the hydrogen atom from the carbonyl atom, then the resultant anion attacks the carbonyl carbon atom on a second molecule of acetaldehyde. 

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The first two steps in the base-catalyzed condensation of acetaldehyde would be described as 

A) attack of  OH on the carbonyl carbon atom, then loss of water. 

B) attack of  OH on the carbonyl carbon atom, then the resultant anion attacks the carbonyl atom on a second molecule of acetaldehyde.

C) OH abstracts an α-hydrogen, then the resultant anion attacks the carbonyl carbon atom on a second molecule acetaldehyde.

D) OH abstracts the hydrogen atom from the carbonyl atom, then the resultant anion attacks the carbonyl carbon atom on a second molecule of acetaldehyde.