作者:Yuzo Kawada、Hiromi Sakai、Makoto Oguri、Gen Koga
DOI:10.1016/0040-4039(94)88184-7
日期:1994.1
The two tortional degrees of freedom about the bond from the bridgehead to the olefinic carbons in cis-1,2-bis(9-triptycyl)ethylene couple slightly less strongly than those in the corresponding methane in spite of the apparently deeper meshing of the two triptycyl moiety, which manifests itself in the unusually large nuclear spin-spin coupling between the olefinic protons.
尽管两个分子之间的啮合深度明显加深,但从顺式-1,2-双(9-三甲苯基)乙烯中桥头到烯烃碳键的键的两个扭转自由度的耦合强度却比相应甲烷中的弱。三烯丙基部分,其表现为烯烃质子之间异常大的核自旋-自旋偶合。