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- W2058923762 abstract "Four cadmium complexes containing betaine and pseudohalide ligands have been synthesised and structurally characterized by single-crystal X-ray analysis. The betaine-azide complex [Cd2(Me3NCH2-CO2)2(N3)4]1 and the betaine-isocyanate [Cd2(Me3NCH2CO2)2(NCO)4]2 are isomorphous, crystallizing in the monoclinic space group C2/c with Z= 4. The two betaine-thiocyanate complexes [Cd3(Me3-NCH2CO2)4(SCN)6(H2O)2]3 and [Cd(Me3NCH2CH2CO2)(NCS)2]4 are both triclinic, space group P with Z= 1 and 2, respectively. All four complexes are polymeric, the carboxy groups of the betaine ligands acting in three co-ordination modes and the pseudohalide ligands in two typical bridging modes. The structure of 1 or 2 consists of a virtually linear chain in which each pair of adjacent metalions are triply bridged by one carboxylate plus two µ-1,1-pseudohalogenide ligands. The framework of 3 is a one-dimensional chain built from corner-sharing centrosymmetric 16-membered (–N–C–S–Cd)4 puckered rings containing µ-1,3-bridging thiocyanate groups in both anti and skew modes; both uni- and bi-dentate chelating modes of the betaine ligands coexist in this complex. The structure of 4 is constructed from an alternate arrangement of two kinds of rings which share corners to form a linear chain: one is an eight-membered chair-like (–N–C–S–Cd)2 ring bridged by a pair of µ-1,3-thiocyanate ligands and the other a four-membered (–O–Cd)2 ring bridged by two carboxylate ligands. The significance of these structural features and the co-ordination geometries at the cadmium centres are discussed." @default.
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- W2058923762 title "Simultaneous binding of betaine and pseudohalide to cadmium: structures of four polymeric mixed-ligand cadmium(II) complexes" @default.
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- W2058923762 doi "https://doi.org/10.1039/dt9930003413" @default.
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