作者:Warô Nakanishi、Satoko Hayashi
DOI:10.1016/s0022-328x(00)00452-6
日期:2000.10
distinguish the structure of halogen adducts of aryl chalcogenides in solutions based on the NMR chemical shifts are confirmed by ab initio molecular orbitals (MO) calculations based on the gauge-including atomic orbitals (GIAO) theory. The criteria are applied to determine the structure of halogen adducts of 1,2-bis(phenylselanyl)benzene (1), 1,4-bis(phenylselanyl)benzene (2), and 1,4-bis(p-tert-bu
基于NMR位移的从头算分子轨道(MO)计算,证实了基于NMR化学位移来区分溶液中芳族硫族化物卤素加合物结构的标准。该标准适用于确定的1,2-双(phenylselanyl)苯(卤素加成物的结构1),1,4-双(phenylselanyl)苯(2),和1,4-双(p -叔-butylphenylselanyl基)苯(3)(1 · ñ X 2,2 · ñ X 2,和3 · ñ X 2,分别为:CDCl 3中的n= 1和2,X = Cl,Br和I)。1 ·Br 2的结构不仅在溶液中而且在晶体中均被证明是三角双锥体(TB)。1 ·Br 2的TB形成与硒酸蒽与溶液中的溴的MC(分子复合物)形成相反。基于硒化物母体的结构,讨论了形成TB和MC的驱动力。对于X = Cl和Br ,2 ·2X 2和3 ·2X 2的结构为(TB,TB),对于X = 1,结构为(MC,MC)。另一方面,1 ·2Br 2的结构显露是TB在一个SeBr