Reactivities of bis(2-bromoethyl)selenium dibromide and its related compounds: formation of hypervalent T-shaped coordinated selenium compounds by reaction with pyridine and its derivatives
作者:Masatsugu Miura、Yoshinori Takanohashi、Yoichi Habata、Sadatoshi Akabori
DOI:10.1016/0040-4039(94)88285-1
日期:1994.10
The reaction of bis(2-bromoethyl)selenium dibromide 1 with pyridine 2a and its derivatives 2b-2d gave hypervalent T-shaped coordinated selenium compounds 3a-3d with two halogen atoms in the trans positions in moderate to good yields. Also, 2-pyridiniumethylselenol bromide 10 was obtained by the reaction of (2-bromoethyl)phenyl selenium dibromide 9 with 2a in 9.8% yield. The X-ray analysis of 10 revealed
双(2-溴乙基)二溴化硒1与吡啶2a及其衍生物2b-2d的反应可得到中等价至良好收率的高价T形配位硒化合物3a-3d,在反式位置带有两个卤素原子。另外,通过使(2-溴乙基)苯基二溴化硒9与2a反应,以9.8%的收率得到2-吡啶乙基乙基硒醇溴化物10。对10的X射线分析表明,关于CH 2 -CH 2键的两个构象异构体存在于一个晶体单元中,尽管1室温下的1 H-NMR谱显示出围绕CH 2 -CH 2键的相对自由旋转。