103992-54-7Relevant academic research and scientific papers
Co-ordination Chemistry of Higher Oxidation States. Part 18. Bidentate Selenoether Complexes of the Tetravalent Platinum Metals. Crystal and Molecular Structure of Cl4>
Hope, Eric G.,Levason, William,Webster, Michael,Murray, Stephen G.
, p. 1003 - 1010 (2007/10/02)
Osmium(IV) complexes have been prepared from 2- and L-L in 2-methoxyethanol.The same ligands and iridium trichloride produce polymeric n>, which are converted into by excess Cl.These IrIII anions are oxidised by chlorine in CCl4 to red-brown IrIV complexes .Halogen (X2) oxidation of (X = Cl or Br) produces stable .Complexes trans- (M = Pt, Ir, or Os) are also described.Ruthenium(III) complexes, , n>, and n> have been prepared, but these, the RhIII analogues, and cannot be oxidised to the tetravalent state.The complexes have been characterised by analysis, i.r., u.v.-visible, 1H, 77Se, and 195Pt n.m.r. spectroscopy and magnetic measurements as appropriate.The 77Se n.m.r. spectra of the -, , - and (prepared in situ) - (X = Cl or Br) complexes have been recorded and the values of δ(Se) and 1J(PtSe) discussed.The structure of Cl4> has been determined by a single-crystal X-ray study and shown to be monoclinic, space group P21/n, with a = 7.926(5), b = 14.545(3), c = 12.307(4) Angstroem, β = 99.88(4) deg, and Z = 4.The structure was refined to R = 0.052 from 1 927 reflections.The structure contains discrete six-co-ordinate Pt and the selenium ligand adopts the meso conformation, Pt-Cl 2.299(4)-2.344(4), Pt-Se 2.432(2) and 2.441(1) Angstroem.
