Nitrido-zido-Komplexe des Molybdän(VI): Synthese und Kristallstruktur von MoN(N3)2Cl(terpy)/ Nitrido Azido Complexes of Molybdenum(VI): Synthesis and Crystal Structure of MoN(N3)2Cl(terpy)

Abstract

MoN(N₃)₂Cl(terpy) is formed by the reaction of MoCl₄(C₂H₅CN)₂ with (CH₃)₃SiN₃ and subsequent addition of terpy. This complex appears also as the main product o f the heterogeneous reaction between MoCl₃(terpy) and (CH₃)₃SiN₃. It crystallizes in the monoclinic space group P 2₁/c with the lattice parameters a = 875.5, b = 1041.4, c = 1891.3 pm, β = 97.00°, Z = 4. The central Mo atom is seven-coordinated in the form of a slightly distorted pentagonal bipyramid, the nitrido and chloro ligands being in axial positions. The triply bonded nitrido ligand ( Mo - N 1 = 166.2 pm) causes a strong trans effect, resulting in a long Mo-Cl distance of 271.9 pm.