Electron spin resonance studies of the CS˙–2 radical anion, and its conjugate acid
作者:Jeremy S. Lea、Martyn C. R. Symons
DOI:10.1039/f19888401181
日期:——
solvent systems at 77 K gave CS˙–2 anions (α) characterized by the g and 13C hyperfine components. A second species (β) having, initially, a 2H coupling of 3.5 G (1H coupling ≈ 23 G) is identified as DSĊS (HSĊS). This changes irreversibly on annealing to a species with an immeasurably small proton coupling, but similar g values. This is thought to be also protonated CS˙–2 but with a more stable conformation
在77 K的CD 3 OD,CD 3 OD–D 2 O或CD 3 OH–H 2 O溶剂系统中暴露CS 2的稀溶液,得到CS˙– 2阴离子(α),其特征是g和13 C超细组分。第二物种(β),其具有,一开始,2 3.5 G(h的耦合1个ħ耦合≈23 G)被标识为DSC的(造血干细胞)。在退火成质子耦合极小但g值相似的物质时,这种变化不可逆地改变。认为这也是质子化CS ˙– 2但构象更稳定。CS 2在甲基四氢呋喃溶液中的辐照也形成了主要物种CS˙- 2(α),但没有β的迹象。然而,第三种(γ)是在退火时形成的,并且在低场下具有两个g值(g 1= 2.024,g 2= 2.021)。第三个大概是接近2.002。该物种初步确定为二聚阴离子(SC)S-S(CS)-。在这项研究过程中,在CD 3中还检测到O – 2自由基阴离子的平行特征OD解决方案。当混合CD 3 OD-d 2 ö溶剂,富含CD 3