
%0 Journal Article
%A Robertson, GB 
%A Whimp, PO 
%T Crystal and molecular structure of a platinum(0) complex of cyclooctyne
%J Australian Journal of Chemistry
%D 1980/06/01
%V 33
%N 6
%P 1373-1379
%K 
%R https://doi.org/10.1071/CH9801373
%U https://www.publish.csiro.au/paper/CH9801373 
%X The crystal and molecular structure of a platinum(0) complex of cyclooctyne, [(coct)Pt(PPh3)2], has been determined from three- dimensional X-ray data collected by counter methods. The complex crystallizes in the space group P21/n [a non-standard setting of space group P21/c (C2h5, No. 14)], with a 20.660(9), b 12.299(5), c 15.470(7) &#506;, &#946; 110.26(2)&#176;, Z 4. The structure was solved by conventional Patterson and Fourier methods and was refined by block-diagonal least-squares techniques to weighted and unweighted R-factors of 0.048 and 0.047 respectively, for the 4733 unique reflections with I/&#963;(I) &#8805; 3.0. The molecule is essentially square planar about the 'central' platinum atom, with the triphenylphosphine groups occupying cis coordination sites. The Pt-C distances are equal within experimental error [2.034(9) and 2.037(9) &#506;] and compare favourably with the corresponding distances in the platinum(0)-cyclohexyne and -cycloheptyne analogues. The acetylenic C=C distance is 1.279(13) &#506; and shows the normal bond lengthening consequent upon coordination. 
