Organic Chemistry Practice Problems Hybridization Practice Problems Solution: In Section 1.12 we discussed the effect that branc...

Solution: In Section 1.12 we discussed the effect that branching can have on the boiling point of a compound. In certain instances, branching may also affect how a molecule can react with different molecules. We use the term “steric hindrance” to describe how branching can influence reactivity. For example, greater “steric crowding” may decrease the reactivity of a C=C π bond (Org. Lett. 1999, 1, 1123–1125). In the following molecule, identify each π bond and determine which has a greater degree of steric crowding. (Note: This is not the same as “steric number”.)   

Problem

In Section 1.12 we discussed the effect that branching can have on the boiling point of a compound. In certain instances, branching may also affect how a molecule can react with different molecules. We use the term “steric hindrance” to describe how branching can influence reactivity. For example, greater “steric crowding” may decrease the reactivity of a C=C π bond (Org. Lett. 1999, 1, 1123–1125). In the following molecule, identify each π bond and determine which has a greater degree of steric crowding. (Note: This is not the same as “steric number”.)