SYNTHESIS AND X-RAY STRUCTURE DETERMINATION OF "DI-MU-CHLORO-BIS(CHLORO[BIS(DIETHYL PHOSPHONITO)]NITROSYLRUTHENIUM(II)), (RUCL2(NO)](ETO)2PO]2H)2

The complexes {RuCl2(NO)[R(EtO)PO] [R(EtO)POH]}2 (R = OEt or Ph) have been prepared in one step from RuCl3-3H2O in ethanol by using Diazald as a nitrosyl source. One isomer was obtained when R was the phenyl group. Single crystals of the other derivative (R = OEt) were obtained directly from the reaction solution. Three-dimensional X-ray data were collected by counter methods. The compound crystallizes in the space group P1 with Z = 1 and a = 9.370 (2) Å, b = 10.248 (5) Å, c = 10.933 (6) Å, α = 93.89 (3)°, β = 101.83 (4)°, and γ = 113.82 (6)°. Full-matrix least-squares methods refined the structure to R = 0.043 from 4004 nonzero independent reflections. Ruthenium atoms are octahedrally coordinated and are linked together by two chlorine atoms, The nitrosyl ligand is linearly bonded to ruthenium(II). The dinuclear molecule lies on a center of symmetry and shows two unsymmetrical RuPOHOP moieties. © 1979, American Chemical Society. All rights reserved.