Diphosphazane supported platinum(II) triflate, amine, and amido complexes: synthesis and X-ray crystal structures

Abstract

Treatment of L 2PtCl 2 (L 2=MeN[P(OPh 2)] 2) with AgSO 3CF 3 gives the triflate complex L 2Pt(SO 3CF 3) 2 ( 1). Addition of 2,6-dimethylaniline to 1 in CH 2Cl 2 gives the monomeric diamine complex [L 2Pt(NH 2Ar) 2](SO 3CF 3) 2 ( 2, Ar=2,6-Me 2C 6H 3), while reaction of 1 with lithium 2,6-dimethylanilide gives the dimeric bridging amido complex [L 2Pt(μ-NHAr)] 2(SO 3CF 3) 2 ( 3 Ar=2,6-Me 2C 6H 3). Cyclometalation is observed when 1 is treated with lithium 2,4,6-triphenylanilide yielding the neutral complex L 2Pt{NH[2-(3,5-Ph 2C 6H 2)C 6H 4]} ( 4). The structures of all four complexes were determined by X-ray diffraction methods. All display the expected four-coordinate square planar Pt geometry. The amine ( 2) and amido ( 3) complexes show NH hydrogen bonding to the triflate anions.