PtCl(PHCy2){(PCy2O)2H}: a hydrogen bonded phosphinito complex obtained by direct reaction of molecular oxygen with a terminal phosphido complexElectronic supplementary information (ESI) available: Fig. S1: ESI-MS positive spectrum of 2. Fig. S2: 1H NMR spectrum of 2 in the low-field region. Fig. S3: 195Pt{1H} NMR spectrum of 2. Fig. S4: 2-D 1H/195Pt XHCOR NMR spectrum of 2. Fig. S5: IR spectrum of 2 (Nujol mull). Fig. S6: 31P{1H} NMR spectrum of 2. Fig. S7: J-resolved 1H NMR spots of 2. Table S1: Spectroscopic features of 3. See http://www.rsc.org/suppdata/dt/b4/b402180k/