Nitrosyl-tetrachloro-dichlorphosphato-molybdat(+II); Darstellung,IR-Spektrum und Kristallstruktur von (AsPh4)2[Mo(NO)Cl4(O2PCl2)]

Nitrosyl-tetrachloro-dichlorophosphate-molybdate(+II); Preparation, I.R. Spectrum and Crystal Structure of (AsPh₄)₂Mo(NO)Cl₄(O₂PCl₂)] The title compound is prepared by the reaction of AsPh₄Mo(NO)Cl₄] with AsPh₄? PO₂Cl₂] in dichloromethane solution. It forms orange crystals which are only little sensitive to moisture. The complex crystallizes triclinic in the space group P1 with two formula units in the unit cell. The structure was solved by X-ray diffraction methods (2498 observed, independent reflexions, R = 5.4%). The compound consists of AsPh₄^⊕ cations and Mo(NO)Cl₄(PO₂Cl₂)]^2? anions. The NO ligand is coordinated in linear array \documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {{\rm MO}}\limits^ \ominus = \mathop {\rm N}\limits^ \oplus = {\rm O}(177^{\circ}) $\end{document}. The dichlorophosphate group is coordinated in trans position to the NO ligand with one of its oxygen atoms. The Mo?N bonding of the NO ligand causes the bond angle NMoCl of 93.2° in average. The IR spectrum is recorded and assigned.