Bis[N,N-bis-(diphenyl-phosphan-yl)cyclo-penta-namine-κ²P,P']platinum(II) bis-(trifluoro-methane-sulfonate)

Abstract

The title compound, [Pt(C₂₉H₂₉NP₂)₂](CF₃SO₃)₂, consists of a Pt(II) atom, situated on an inversion centre, coordinated by two diphosphinoamine bidentate ligands and charge-balanced by two trifluoro-methane-sulfonate anions. The Pt(II) atom has a distorted square-planar geometry defined by the four P atoms. The distortion is illustrated by the P-Pt-P bite angle of 70.31 (4)°. The geometry around the N atom deviates from a trigonal-planar geometry, evidenced by the P-N-P bite angle of 102.3 (2) °. The N atom is displaced by 0.114 (4) Å from the C/P/P plane. In order to coordinate, the orientation of the phenyl rings alters from a C(s) conformation to a C(2v) conformation. The cyclo-pentane ring is slightly twisted: the puckering parameters are q(2) = 0.420 (5) Å and ϕ = 26.5 (8) °. The trifluoro-methane-sulfonate anion displays a 0.511 (11):0.489 (11) positional disorder. Weak inter- and intra-molecular C-H⋯O hydrogen bonds influence the crystal packing.

Fig. 1.

Molecular structure of the title compound. Displacement ellipsoids are drawn at the 50% probability level. Atoms generated through the twofold rotation axis are represented by atoms ending with 'i'. Hydrogen atoms have been omitted for clarity. Dashed lines denote the minor disordered atoms. Symmetry transformations used to generate equivalent atoms: 2 - x, -y, 2 - z.

Fig. 2.

Crystal packing of the title compound, viewed along the a axis showing the hydrogen bonds as dashed lines. Only applicable atoms with relevance to the hydrogen bonds are drawn at the 50% probability level.