Whitmore and Rothrock1 showed that the hydroxyl group in neo-pentyl alcohol has remarkable resistance against replacement by a halogen atom through the agency of thionyl chloride and phosphorus tribromide. Dostrovsky, Hughes and Ingold2 attribute this to steric hindrance to end-on approach to the α-carbon atom. Whitmore and Rothrock, however, leave the impression that neo-pentyl alcohol does not interact at all with these reagents, and indeed state : âThe inactivity of neopentyl alcoholto heat and reagents has been demonstratedâ ; but the work of Gerrard3 enabled us to predict probability of easy broadside approach.
Whitmore 和 Rothrock1 发现,通过亚
硫酰氯和
三溴化磷的作用,
新戊醇中的羟基对卤原子的置换具有显著的抵抗力。Dostrovsky、Hughes 和 Ingold2 将此归因于δ-碳原子末端的立体阻碍。然而,惠特莫尔和罗思罗克却认为
新戊醇与这些试剂完全没有相互作用,他们还说:"......
新戊醇没有活性:
新戊醇对热和试剂的不活泼性已经得到证实。