X-Ray and Neutron Diffraction Studies of the Crystal and Molecular Structures of Tris(ethylene)Platinum and Bis(ethylene)(Tetrafluoroethylene) Platinum

Details X-Ray and Neutron Diffraction Studies of the Crystal and Molecular Structures of Tris(ethylene)Platinum and Bis(ethylene)(Tetrafluoroethylene) Platinum X-Ray and Neutron Diffraction Studies of the Crystal and Molecular Structures of Tris(ethylene)Platinum and Bis(ethylene)(Tetrafluoroethylene) Platinum

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rspsa.386..145h&link_type=abstract

Proceedings of The Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 386, Issue 1790, pp. 145-161

Physics

1

Scientific paper

The structures of tris(ethylene)platinum and bis(ethylene)(tetrafluoroethylene)platinum have been established by X-ray and neutron diffraction experiments. Tris(ethylene)platinum [Pt(C_2H_4)_3] (I), formed by the displacement of 1,5-cyclooctadiene from bis(1,5-cyclooctadiene)platinum by ethylene, crystallizes in the trigonal space group R 3m (a = b = 7.225(4), c = 11.054(7) Å, 120 K) and [Pt(C_2H_4)_2(C_2F_4)] (II), obtained by the replacement of one ethylene ligand in (I) by tetrafluoroethylene, is shown to be triclinic, space group A{1} with a = 8.680(3), b = 7.432(3), c = 12.716(6) Å, α = 90.13(4), β = 109.42(3), γ = 90.17(3)^circ (155 K). In both complexes, the six ligated carbon atoms are coplanar with the Pt atom at distances dependent primarily on the nature of the substituent at the contact carbon atom: mean Pt-C(H) 2.218(2), mean Pt-C(F) 2.031(5). Concomitant variations are recorded for the C=C separations, namely C=C(H), 1.382(7); C=C(F), 1.435(6). (I) exhibits a positional disorder of the ethylene ligands between two equivalent sites.

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