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(triphenylphosphine)tetracopper(I)

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DYASON, JC
ENGELHARDT, LM
PAKAWATCHAI, C
HEALY, PC
WHITE, AH
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1985
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Abstract

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) ?, ߠ112,33(3)໠R 0.043 for No 3444. Cu( trigonal )- P;Br respectively are 2.191(3); 2.409(2), 2.364(2) ?. Cu(tetrahedral)- P;Br respectively are 2.241(3), 2.249(3); 2.550(2), 2.571(2) ?. 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) ?, ߠ110.92(3)໠R 0.072 for No 3055. Cu( trigonal )- P;Br respectively are 2.206(5); 2.371(3), 2.427(2) ?. Cu(tetrahedral)- P;Br are 2.207(4); 2.446(2), 2.676(3), 2.515(3) ?.

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Australian Journal of Chemistry

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38

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Chemical sciences

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