Propose structures that are missing. Show all relevant stereochemistry

1. Propose structures that are missing. Show all relevant stereochemistry
2. Same as question #1
3. Write complete stepwise mechanism for the reaction provided. Show all intermediate structures and all electron flow with arrows.
4. The substance formed on addition of water to an aldehyde or ketone is called a hydrate or
a. vicinal diol b. geminal diol c. acetal d. ketal
5. The reaction of benzaldehyde with hydrogen cyanide is catalyzed by the addition of a small amount of KCN. Write the complete reaction mechanism for the KCN-catalyzed reaction. Show all electron flow with arrows and show all intermediate structures.
6. The product of the reaction is (please see attachment)
a. an ylide b. acetal c. a gem diol d. a hydrate

Attachments