| Abstract: | Crystal Structure of (AsPh4)2[W2NCl10] The title compound is formed by a slow reaction of AsPh4[WNCl4] in acetonitrile solution in form of dark brown crystals. The crystal structure was solved by X-ray diffraction methods (R = 4.7%; 1461 observed, independent reflexions). (AsPh4)2[W2NCl10] crystallizes in the monoclinic space group P21/n with two formula units per unit cell. The structure consists of AsPh4θ and [W2NCl10]2θ ions. The tungsten atoms with oxidation numbers five and six respectively, are linked by a linear, asymmetric nitrido bridge (r WN = 171 and 203 pm). The trans-effect of the W? N-multiple bonds causes a significant difference between axial (W? Clax 243 pm) and equatorial (mean W? Cleq 230 pm) bond lengths. |
