The following reaction mechanism contains error. Which of the following statements correctly describes the curved arrows consistent with the reaction?

Question

Quizplus · Accepted Answer

The curved arrow should show the hydride (which is a H- ion) attacking the carbonyl carbon. This should be followed by the movement of electrons in the carbonyl double bond to the oxygen atom. Then, a second curved arrow should show the oxygen donating a lone pair to replace the lost bond to the carbonyl carbon, while the carbon-oxygen double bond reforms. Therefore, choice B is correct as it reflects the correct sequence of curved arrows.

The Following Reaction Mechanism Contains Error