TETRAKIS(TRIMETHYLPHOSPHORANEIMINATO)MOLY BDENUM DICHLORIDE, [MO(NPME(3))(4)]CL-2

[Mo(NPMe(3))(4)]Cl-2 has been prepared by the reaction of MoNCl3 with N-(trimethylsilyl)trimethylphosphanimine in dichloromethane solution f rom which the complex crystallizes with one CH2Cl2 molecule per formul a unit. [Mo(NPMe(3))(4)]Cl-2 . CH2Cl2:Space group P2(1)/c, Z=4. Lattic e dimensions at -40 degrees C: a=1244.2(1), b=1609.6(1), c=1595.9(1) p m, beta=90.36(1)degrees. The structure consists of chloride ions and d ications [Mo(NPMe(3))(4)](2+) in which the molybdenum atom is tetrahed rally coordinated by the four nitrogen atoms of the (NPMe(3))(-) group s with MoN bond lengths of 180.7 pm in average which correspond with d ouble bonds.