
%0 Journal Article
%A Engelhardt, LM 
%A Healy, PC 
%A Kildea, JD 
%A White, AH 
%T Lewis-Base Adducts of Group 11 Metal(I) Compounds. LIII. Synthesis and Structural Characterization of Binuclear &#956;,&#956;'-Dichloro-, Dibromo and Diiodo-bis[(pyridine)(triphenylphosphine)copper(I)] Complexes, and Their Pyridine-4-carbonitrile Analogues
%J Australian Journal of Chemistry
%D 1989/06/01
%V 42
%N 6
%P 913-922
%K 
%R https://doi.org/10.1071/CH9890913
%U https://www.publish.csiro.au/paper/CH9890913 
%X Mixed base pyridine (py)/triphenylphosphine adducts of the copper(1) halides, CuX, have been synthesized for 1 : 1 : 1 stoichiometry for X = chloride and iodide; single-crystal X-ray structure determinations of these show them to be isomorphous and isostructural with that of the bromide recorded elsewhere, being µ,µ&#8242;- dihalo-bridged dimers , [(PPh3)( py )CuX2Cu( py )(PPh3)], monoclinic, C2/c, a &#8776; 26.2, b &#8776; 14.3, c &#8776; 11 .2 Å , &#946; &#8776; 95, Z = 4 dimers. The bromide has been isolated as a new monoclinic C 2/m polymorph, a 11 .279(8), b 14.268(6), c 13.858(4) Å, &#946; 109.33(6)º, Z=4 dimers, and details of its structure are also recorded. The structures of their pyridine-4-carbonitrile (pycn) analogues have also been determined and found to be also binuclear, with no cyano-copper interactions; these also are an isomorphous, isostructural series, monoclinic P21/n, a &#8776; 15.4, b &#8776; 8.1, c  &#8776; 17.9 Å , &#946; &#8776; 101 º, Z = 2 dimers. In each series of dimers, one half of the dimer is crystallographically independent, the generators of the other half being twofold rotor (C2/c phase), mirror (C2/m phase) and inversion centre (P21/n phase) respectively. 
