Acta Cryst. (2003). E59, m239-m240  [ doi:10.1107/S1600536803007256 ]

Di--chloro-bis({[bis(trimethylsilyl)amino]dichlorophosphoraniminato}trichlorotantalum(V))

E. Rivard, A. J. Lough and I. Manners

Abstract: The title compound crystallizes as a centrosymmetric chlorine-bridged dimer, [Cl₄Ta-N=PCl₂-N(SiMe₃)₂]₂ or [Ta₂Cl₈(C₆H₁₈Cl₂N₂PSi₂)₂], with one monomer in the asymmetric unit. The Ta atoms adopt a distorted octahedral geometry with the bridging Cl atom and the N atom of the phosphoraniminate ligand occupying axial positions. The Ta-N-P angle within the complex is 155.9  (2)°, with a Ta-N bond length of 1.827  (4)  Å; similar P-N distances are observed within the NPN moiety [1.578  (4) and 1.600  (4)  Å]. The P atom exists in a distorted tetrahedral geometry, while the silylated terminal N atom is close to planar [angle sum = 358.8  (3)°].

Online 16 April 2003

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