Preparation and crystal structure of the paramagnetic solid F<sub>3</sub>CCSSSCCF<sub>3</sub>AsF<sub>6</sub>: implications for the identity of RCSSCR˙<sup>+</sup>
作者:T. Stanley Cameron、Robert C. Haddon、Saba M. Mattar、Simon Parsons、Jack Passmore、Arthur P. Ramirez
DOI:10.1039/dt9920001563
日期:——
spectrum of MeO2C[graphic omitted]CO2Me˙+, which consisted of a singlet at g= 2.017, with two sets of 33S satellites in a 2:1 intensity ratio, with very similar 33S coupling constants (8.0 and 8.9 G). The salt F3C[graphic omitted]CF3AsF6 is reduced by KI to give a mixture of neutral cyclic polysulfides including F3C[graphic omitted]CF3(43%) and the previously unknown F3C[graphic omitted]CF3(23%). Attempts
4,5-双(三氟甲基)-1,2,3-六氟砷酸trithiolylium,其中包含7π˚F 3 C [图形省略] CF 3 ˙ +自由基阳离子,阳离子碳-硫杂环的第一示例中,已经制备和表征。通过F 3 CCCCF 3与S 4(AsF 6)2和S 8(AsF 6)2的1:1混合物在50°C下于SO 2中反应2,以90%的产率将其制备为紫色固体。周。通过用新鲜的F 3处理去除了少量的均聚原子硫阳离子(可能是S 8 2+)将SO 2中的CCCCF 3和AsF 5在50°C下放置8 d。通过化学分析,IR,质谱[在m / z 258时的M +(100%)]和X射线晶体学表征F 3 C 3 CF 3 AsF 6为固态。晶体结构由含有单体的层,平面˚F 3 C [图形省略] CF 3个˙ +自由基阳离子和ASF 6 -阴离子[空间群晶Pnma,一个= 12.241(4),b = 8.232(5),C ^