Single-crystal electron-spin resonance study of the 4-phenyl-1,2,3,5-dithiadiazolyl radical
作者:F. L. Lee、K. F. Preston、A. J. Williams、L. H. Sutcliffe、A. J. Banister、S. T. Wait
DOI:10.1002/mrc.1260271210
日期:1989.12
trithiatriazinide , prepared by the reduction of S5N5+AlCl4− in SO2 with , contain a trace paramagnetic impurity which is shown by EPR spectroscopy to be the dithiadiazolyl free radical . The g and 14N hyperfine tensors of the radical were deduced from measurements made throughout three mutually orthogonal planes of crystallographically aligned specimens: g = (2.0011, 2.0075, 2.0197); 14N(2) = (37.1, 11
S5N5+AlCl4− 在 SO2 中用 还原制备的 4-苯基-1,2,3,5-二噻二唑鎓三噻嗪单晶含有痕量顺磁性杂质,EPR 光谱显示该杂质为二噻二唑自由基。自由基的 g 和 14N 超精细张量是从晶体对齐样品的三个相互正交平面上进行的测量推导出来的:g = (2.0011, 2.0075, 2.0197);14N(2) = (37.1, 11.3, 3.4 MHz.)。在实验误差范围内,两个氮超精细相互作用张量共线,并且它们的最大主值平行于 gmin 并垂直于宿主阳离子的平面。结果被解释为平面 π 自由基取代平面主体阳离子,