中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1-Ethenyliden-4-methylencyclohexan | 84980-64-3 | C9H12 | 120.194 |
—— | 1,4-Bis(ethenyliden)cyclohexan | 84980-63-2 | C10H12 | 132.205 |
1,2,4-三(亚甲基)环己烷 | 1,2,4-tris(methylene)cyclohexane | 14296-81-2 | C9H12 | 120.194 |
From consideration of electrical polarization and nuclear magnetic resonance measurements, 1,4-dimethylenecyclohexane and its exo-tetramethyl and tetraphenyl analogues have been assigned the flexible ring conformation, as have also 1,4-dithiane and cis-1,4-dithiane-1,4-dioxide. However, the magnitudes of the moments indicate that uniform flexibility is not prevalent, the stretched form being predominant. In contrast to these flexible forms the conformation of dithiane monoxide is thought to be chair and that of 2,5-diphenyl-1,4-dithiin a fixed boat.