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Chian Sing Lai, Edward R. T. Tiekink
Polymeric topologies in cadmium(II) dithiophosphate adducts of the isomeric n-pyridinealdazines, n = 2, 3 and 4
Keywords: Cadmium dithiophosphate, Dithiophosphate, n-Pyridinealdazines, Polymer topology, Crystal and molecular structure
A series of crystal structures of adducts formed between cadmium dithiophosphate, Cd(S2P(OiPr)2)2, and the isomeric n-pyridinealdazine ligands, n = 2, 3, and 4, are described. A centrosymmetric dimer is found in the 2 : 1 adduct with the 2-isomer, i.e. [Cd(S2P(OiPr)2)2(2-NC5H4C(H) = C(H)C5H4N-2)0.5]2, in which the cadmium atom exists within a cis-N2S4 donor set and the di-pyridyl-type ligand is tetradentate. By contrast, trans-N2S4 donor sets for cadmium and regular bridging modes of coordination lead to polymers with a step-ladder topology are found in the 1:1 adducts with the 3- and 4-isomeric ligands, i.e. [Cd(S2P(OiPr)2)2(n-NC5H4C(H) = C(H)C5H4N-n)]∞, for n = 3 and 4. Differences in aggregation behaviour are related to the binding requirements of the n-pyridinealdazine ligands.
Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag
Print ISSN: 0044-2968
Volume: 221, 04/2006
Pages: 288 - 293