acenaphtho[1,2-a]acenaphthylene (1) with elemental sulfur gave a pentathiepane derivative (2). Dynamic NMR analyses revealed that the two naphthalene rings of 2 are chemically nonequivalent up to 100 °C due to freezing of the inversion of the pentathiepane ring. Thus, sulfuration of 5-phenylacenaphtho[1,2-a]acenaphthylene gave a pair of conformers which were isolable and whose steterochemistry was determined
用元素
硫磺化[[1,2- a ] ylene(1),得到五乙pan衍
生物(2)。动态NMR分析表明,两个
萘环2是
化学非等价高达100℃由于pentathiepane环的反转的冻结。因此,对5-苯基ac [1,2- a ] ac进行
硫化,得到一对可分离的构象体,并通过X射线衍射分析确定其立体
化学。这些构象异构体在室温下在溶液中彼此缓慢异构化。