The geminally disubstituted olefins specifically include isobutylene, 3-trimethylsilyl-2-methyl-1-propene, 2-methyl-1-butene, 2-methyl-1-pentene, 2-ethyl-1-pentene, 2-methyl-1-hexene, 2-methyl-1-heptene, 6-dimethylamino-2-methyl-1-hexene, ??-methylstyrene and the like as representative compounds. [0018] In another embodiment, the invention is a composition comprising a geminally disubstituted olef