Hydrido-dihydridotetrakis triethylphosphine diplatinum II Tetraphenylborate

The compound [(PEt3)2HPt(/i-H)PtH(PEt3)2] [BPhJ is a white crystalline, air-stable solid when pure, which melts with decomposition above 130°C. The solid is fairly stable at room temperature, but it is light sensitive and is best stored in a refrigerator. It is soluble in acetone and dichloromethane. The solutions are relatively unstable at room temperature and thus are best prepared just before use employing pre-cooled solvents. The decomposition 

A comprehensive set of NMR parameters and a figure of the HNMR spectrum have appeared elsewhere.  

The easiest spectroscopic characterization of this complex is done through its PNMR spectrum, recorded in acetone-dg solution. This shows one central multiplet, flanked by its Pt satellites, with the following parameters 5,P, 20.1 j p,p = 2580Hz and Vp,.p= 18 Hz. 

This spectrum is similar to that of the related compound [(PEt3)(Ph)Pt- /i-H)Pt(Ph)(PEt3)2] [BPh4], and the reader is referred to those references for a detailed description of the appearance and interpretation of the PNMR spectra of compounds of this type. 

The HNMR spectral data, recorded in dichloromethane-d2 solution, are —8.19 and —6.42. 

An X-ray structure determination of this compound shows a disordered arrangement of the cations in the crystal lattice, and allows only the precise location of the metal and donor phosphorus atoms. This, however, is indicative of a bent arrangement of the Pt—H—Pt moiety, typical of compounds containing a single M—H—M bridge.  

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