Research Article: Bis[N,N-bis­(diphenyl­phosphan­yl)cyclo­penta­namine-κ2P,P′]platinum(II) bis­(trifluoro­methane­sulfonate)

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Ilana Engelbrecht, Hendrik G. Visser, Andreas Roodt.


The title compound, [Pt(C29H29NP2)2](CF3SO3)2, consists of a PtII atom, situated on an inversion centre, coordinated by two diphosphinoamine bidentate ligands and charge-balanced by two trifluoro­methane­sulfonate anions. The PtII 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 Cs conformation to a C2v conformation. The cyclo­pentane ring is slightly twisted: the puckering parameters are q2 = 0.420 (5) Å and ϕ = 26.5 (8) °. The trifluoro­methane­sulfonate anion displays a 0.511 (11):0.489 (11) positional disorder. Weak inter- and intra­molecular C—H⋯O hydrogen bonds influence the crystal packing.

Partial Text

For related platinum(II) complexes, see: Farrar & Browning (1995 ▶); Dyson et al. (2004 ▶); Cloete et al. (2010 ▶); Engelbrecht et al. (2010a ▶,b ▶). For diphosphinoamine (PNP) and other P-donor ligands, see: Keat et al. (1981 ▶); Purcell et al. (1995 ▶); Cotton et al. (1996 ▶); Otto & Roodt (2001 ▶); Fei et al. (2003 ▶); Otto et al. (2005 ▶); Muller et al. (2008 ▶); Engelbrecht et al. (2010c ▶,d ▶, 2011 ▶). For their use in catalytic olefin transformation reactions, see: Haumann et al. (2004 ▶); Crous et al. (2005 ▶); Booyens et al. (2007 ▶); Ferreira et al. (2007 ▶). For puckering parameters, see: Cremer & Pople (1975 ▶).




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