One-electron reduction of di-imidosulphur compounds, S(NR)2, and some complexes of Group 6A metal carbonyl derivatives containing S(NR)2 ligands: studies of the radical products by electron spin resonance spectroscopy
作者:John A. Hunter、Boyd King、W. Edward Lindsell、Margaret A. Neish
DOI:10.1039/dt9800000880
日期:——
Reduction of the di-imidosulphur compounds, S(NR)2(R = But, Ph, 4-MeC6H4, or 4-O2NC6H4), in 1,2-dimethoxyethane solution with a potassium mirror in vacuo gives fairly stable solutions of the corresponding anion radicals [S(NR)2]– which have been studied by e.s.r. spectroscopy. The frozen-solution e.s.r spectrum of K[S(NBut)2] has also been recorded. Isotropic coupling constants A(14N), A(1H) and, for
在带有钾镜的1,2-二甲氧基乙烷溶液中还原二亚氨基硫化合物S(NR)2(R = Bu t,Ph,4-MeC 6 H 4或4-O 2 NC 6 H 4)在真空中得到相应的阴离子自由基[S(NR)的相当稳定的解决方案2 ] -已经研究了通过ESR光谱。还记录了K [S(NBu t)2 ]的冷冻溶液esr光谱。各向同性耦合常数A(14 N),A(1 H),并且对于R = Bu t,A(33 S)已根据经验的电子密度关系根据自由基的电子结构进行了推导和分析。已经进行了一些CNDO / 2和INDO计算,并对实验和计算出的电子自旋密度进行了比较。可变温度esr测量未提供溶液中阴离子存在不同几何异构体的迹象。模型计算表明,E / E构象最稳定,并且相互转换可以得到E / Z或Z / Z形式是不可能的。在所有情况下的实验证据表明两个氮原子在磁性上是等价的。物种M I [S(NBu t)2 ](M I =