Solution Conformational Features of the Unsymmetrical Metalla Crown Ether <i>cis</i>-Mo(CO)<sub>4</sub>{2-(2,2‘-O<sub>2</sub>C<sub>12</sub>H<sub>8</sub>)PO(CH<sub>2</sub>CH<sub>2</sub>O)<sub>2</sub>- 2-C<sub>20</sub>H<sub>12</sub>-2‘-OP(2,2‘-O<sub>2</sub>C<sub>12</sub>H<sub>8</sub>)} from 2D NMR Spectroscopy and Molecular Modeling
作者:Maheswaran Hariharasarma、Charles L. Watkins、Gary M. Gray
DOI:10.1021/om9906969
日期:2000.4.1
assigned using a combination of 13C DEPT, 1H−1H COSY, 13C1H} HETCOR, 31P1H} HETCOR, 1H13C} HMBC, and 1H−1H NOESY NMR experiments. The solution conformation was analyzed using 1H−1H vicinal coupling constants and 1H−1H NOESY NMR experiments. The vicinal 1H−1H coupling constants for the ethylene protons indicated that both ethylenes were gauche. The 1H−1H NOESY NMR experiments showed a number of close
一种新的不对称金属冠醚顺式-Mo(CO)4 2-(2,2'-O 2 C 12 H 8)PO(CH 2 CH 2 O)2 -2-C 20 H 12 -2'- OP(2,2'-O 2 C 12 H 8)}已设计用于溶液构象研究。通过α,ω-双(磷供体)聚醚配体2-(2,2'-O 2 C 12 H 8)PO(CH 2 CH 2 O)2 -2-C 20 H反应制备配合物12具有Mo(CO)4(nbd)的-2'-OP(2,2'-O 2 C 12 H 8)。单独的1个观察为metalla冠醚的八个亚甲基质子的6 1 H NMR共振,表明metalla冠醚环的运动受到限制。使用13 C DEPT,1 H- 1 H COSY,13 C 1 H} HETCOR,31 P 1 H}的组合完全确定了金属冠醚的1 H,13 C和31 P NMR化学位移HETCOR,1小时 13C} HMBC和1 H-