118962-97-3Relevant academic research and scientific papers
Chelate-stabilised Primary, Secondary and Tertiary Alcohol and Alkoxo Platinum(II) Complexes. X-Ray Crystal Structure of
Alcock, Nathaniel W.,Platt, Andrew W. G.,Pringle, Paul G.
, p. 139 - 144 (2007/10/02)
The co-ordination chemistry of the phosphino alcohols Ph2PCH2CHROH, R=Me (1b) or H (1c), with platinum(II) is reported.Ligands (1b), (1c) form the neutral complexes cis-, R=Me (4b) or H (4c), which remain unchanged in CDCl3.Howewer, in CD3OD the fluxional chelate (2b) is formed.The bis(alcohol) complex (5b) is made by treatment of (4b) with AgClO4.Deprotonation of (4b) with NEt3 or (4c) with NaOH gives the bis(alkoxo) species , R=Me (3b) or H (3c), quantitatively .Treatment of (4c) with NEt3 gives a complex which in solution has the fluxional, binuclear, unsymmetrically alkoxo-bridged structure (6) and in the solid state probably has the mononuclear structure (8).The effect of the methyl substituents in the ligand backbone is discussed.Phosphorus-31 n.m.r. evidence shows that the order of trans influence of alkoxo ligands is 3 deg > 2 deg > 1 deg but the differences are small.The X-ray structure determination of (3c) (R=0.038 for 1 885 observed diffractometer-measured reflections)shows square planar co-ordination about Pt, with normal Pt-P and Pt-O distances.It is concluded that the stability of the chelate alkoxo complexes is due to the conformation of the chelate ring making β-hidrogen elimination unfavourable.
