
%0 Journal Article
%A Dyason, JC 
%A Engelhardt, LM 
%A Pakawatchai, C 
%A Healy, PC 
%A White, AH 
%T Lewis-Base Adducts of Group 1B Metal(I) Compounds. XXI The Crystal and Molecular Structures of the Unsolvated Forms of Dibromotris(triphenylphosphine)dicopper(I) and 'step' Tetrabromotetrakis(triphenyl-phosphine)tetracopper(I)
%J Australian Journal of Chemistry
%D 1985/08/01
%V 38
%N 8
%P 1243-1250
%K 
%R https://doi.org/10.1071/CH9851243
%U https://www.publish.csiro.au/paper/CH9851243 
%X The crystal structures of the title compounds have been determined by single-crystal X-ray diffraction methods at 295 K. Crystal data for (PPh3)2CuBr2Cu(PPh3) (1) show that the crystals are iso-morphous with the previously studied chloro analogue, being monoclinic, P21/c, a 19.390(8), b 9.912(5), c 26.979(9) &#506;, &#946; 112,33(3)&#176;; R 0.043 for No 3444. Cu( trigonal )- P;Br respectively are 2.191(3); 2.409(2), 2.364(2) &#506;. Cu(tetrahedral)- P;Br respectively are 2.241(3), 2.249(3); 2.550(2), 2.571(2) &#506;. Crystals of 'step' [PPh3CuBr]4 (2) are isomorphous with the solvated bromo and unsolvated  iodo analogues, being monoclinic, C2/c, a 25.687(10), b 16.084(7), c 17.815(9) &#506;, &#946; 110.92(3)&#176;; R 0.072 for No 3055. Cu( trigonal )- P;Br respectively are 2.206(5); 2.371(3), 2.427(2) &#506;. Cu(tetrahedral)- P;Br are 2.207(4); 2.446(2), 2.676(3), 2.515(3) &#506;. 
