Br Br 1) NaNH2 (excess) 2) H₂O HgSO4, H2SO4 H₂O 1) NaNH2 (1 equivalent) 2) 1) 9-BBN. THF 2) H₂O₂, NaOH Br

Dimethyl cyclopropanes can be prepared by the reaction of an α, β-unsaturated carbonyl compound X with two equivalents of a Wittigreagent Y. Draw a stepwise mechanism for this reaction.

Circle and label any hemiacetals or acetals in the following compound

N-ethyl-6-methyl-5-propyl-3-nonanamine 4-butyl-1,2-dimethylcyclohexanol