218960-61-3Relevant academic research and scientific papers
The chemistry of pyridine thiols and related ligands - 8. Synthesis, NMR spectroscopy and crystal structure of first trans-[bis(pyridine-2-thiolato-S)-bis(triphenyl phosphine) platinum(II)]
Lobana, Tarlok S.,Verma, Renu,Castineiras, Alfonso
, p. 3753 - 3758 (1998)
Reaction of bis(pyridine-2-thiolato-N,S)platinum(II) (1) in acetonitrile (obtained from PtCl2 and Na+C5H4NS-) with two equivalents of PPh3 forms monomeric Pt(C5H4NS)2(PPh3)2 (2) whose X-ray structure has been determined. It crystallises from a acetonitrile-chloroform mixture and exists as a centrosymmetric square planar monomer. Pyridine-2-thiolate binds to Pt via S-atoms in a trans-configuration and the other two positions are occupied by P atoms of PPh3. The interatomic important parameters are: Pt-S = 2.343(2), Pt-P = 2.3147(13), C-S = 1.739(6) A, bond angles P-Pt-P* and S-Pt-S* each = 180.0°, P-Pt-S, P*-Pt-S = 85.24° (acute) and P-Pt-S*, P*-Pt-S = 94.76° (obtuse). It represents the first example of a structurally characterised S-bonded pyridine-2-thiolato Pt(II) complex. The NMR data (1H, 13C, 31P) suggest dissociation of 2 in CDCl3 as follows: Pt(C5H4NS)2(PPh3)2 (2)→Pt(C5H4NS)2(PPh3) (2a)+PPh3. Both N,S- and S-bonded C5H4NS- moieties are confirmed from 1H and 13C NMR.
