Lewis-Base Adducts of Group 11 Metal(I) Compounds. XL : Conformational systematics of [(N-base)1(CuX)1]∞ orthogonal 'stair' polymers (N-base = 'one-dimensional' aceto-, benzo-nitrile ligand)
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The structural chemistry of the polymeric 1:1 adducts of copper(1) halides ( CuX ; X = Cl, Br, I) with nitrile bases (exemplified by aceto- and benzo-nitrile ) has been systematically explored. Single-crystal X-ray structure redeterminations of enhanced precision have been carried out for all acetonitrile adducts (refined as orthorhombic, Pbnm , Z 4, a 蠱3.0, b 蠸.5, c 蠴.0 Š; R 0.039, 0.030, 0.043 for No = 534, 365, 727 'observed' reflections) and the chloride and bromide benzonitrile adducts (monoclinic, P21/n, a 蠳.9, b 蠱7.5, c 豰.9 Š, ߠ蠹8, Z 4); R 0.046, 0.048 for No = 1452, 1209); all structures are of the common one-dimensional 'stair' polymer type. In these adducts, the ligand is essentially 'one-dimensional' with substituents well removed from the point of attachment and from interaction within the parent polymer chain. Under these circumstances, the polymer is essentially 'orthogonal' with Cu-X crosslinks at (or nearly at) right angles to the polymer axis, and containing quasi-mirror planes, the series providing reference parameters for the description of distortions observed in these polymers when more hindered bases are coordinated.
Australian Journal of Chemistry