[TcNBr4]– are typical of ions with a 4d1 electronic configuration and the unpaired electron in an orbital with substantial 4dxy character. The crystal structure of [AsPh4][TcNCl4] has been determined by single-crystal X-ray diffraction methods at 21 °C. Crystals are tetragonal, space group P4/n, with a= 12.707(2), c= 7.793(1)Å, and Z= 2. Full-matrix least-squares refinement gave a final R value of 0.031
通过使[NH 4 ] [TcO 4 ]与NaN 3反应,制备了空气稳定的化合物R [TcNCl 4 ]和R [TcNBr 4 ](R = [AsPh 4 ] +或[NBu n 4 ] +)。在浓
盐酸或
溴化氢存在下。[TcNCl的ESR光谱4 ] -和[TcNBr 4 ] -是典型的具有4离子的d 1个电子配置和在轨道不成对电子具有大量4 d XY字符。[AsPh 4的晶体结构] [TcNCl 4 ]已经通过单晶X射线衍射法在21℃下测定。晶体为四边形,空间群P 4 / n,a = 12.707(2),c = 7.793(1)Å,Z =2。全矩阵最小二乘法精炼得到的0 1独立于0的最终R值为0.031。思考。该化合物是同构的,具有系列[AsPh 4 ] [MNCl 4 ](M = MO,W,Re,Ru或Os)和[AsPh 4 ] [MOCl 4 ](M = MO或Re)。的[TcNCl 4 ]