The Relative Coordinating Ability of Some Weak O-Donor Anions and Water Towards the [Pt(terpy)]2+ (terpy = 2,2':6',2''-terpyridine) Center - X-ray Crystal Structures of [Pt(terpy)(H2O)](CF3SO3)2 and [Pt2(μ-OH)(terpy)2](PF6)2(CF3SO3)

Acidolysis of the complexes [Pt(CH3)(terpy)]Y (Y = PF6, CH3SO3, CF3SO3, ClO4, BF4; terpy = 2,2':6',2''-terpyridine) with an equimolar amount of CH3SO3 in 2,2,2-trifluoroethanol (TFE) affords the corresponding methanesulfonato derivatives [Pt(OSO2CH3)(terpy)]Y. When Y = NO3 a nearly equimolar mixture of the methanesulfonato and nitrato complexes is obtained, whereas the reaction of [Pt(CH3)(terpy)]( CF3SO3) with triflic acid in either dry TFE or CH2Cl2 gives the aqua species [Pt(terpy)(H2O)](SO3CF3)2 (8 ), whose X-ray crystal structure is reported. This structure shows hydrogen bonding between the coordinated water molecule and two triflate ions. 1H NMR evidence is reported that suggests that this hydrogen bonding is partially retained in CD3NO2 solution. The new hydroxido-bridged dimers [Pt2(μ- OH)(terpy)2](X) [X = (ClO4)3, (PF6)2(CF3SO3) (12)] have been isolated and their X-ray crystal structures determined.