Acta Cryst. (2009). E65, m357  [ doi:10.1107/S1600536809007016 ]

trans-Di--acetato-[-N,N-bis(diphenylphosphino)aniline]bis[chloridomolybdenum(II)](Mo-Mo)-dichloromethane-tetrahydrofuran (1/0.3/1.7)

M. Hapke, A. Wöhl, S. Peitz, A. Spannenberg and U. Rosenthal

Abstract: The molecular structure of the title compound, [Mo₂(CH₃COO)₂Cl₂(C₃₀H₂₅NP₂)]·0.3CH₂Cl₂·1.7C₄H₈O, features an Mo-Mo dumbbell bridged by two acetate groups which are trans to each other. Perpendicular to the plane spanned by the acetate groups, the Ph₂PN(Ph)PPh₂ ligand bridges both Mo atoms, having a P-N-P angle of 114.09 (19)°. In a trans position to the PNP ligand are two Cl atoms, one on each molybdenum centre. The Mo-Mo bond distance is 2.1161 (9) Å, within the range known for Mo-Mo quadruple bonds. The Mo complex is located on a crystallographic twofold rotation axis which runs through the N-C bond of the ligand. The site occupation factors of the disordered solvent molecules were fixed to 0.15 for dichloromethane and 0.85 for tetrahydrofuran.

Online 6 March 2009

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