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Issue 11, 2017
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Coordination chemistry of mercury(ii) with 2-pyridylnitrones: monomers to polymers

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The coordination chemistry of mercury(II) halides, HgX2, X = Cl, Br, I, with N-methyl-α-(2-pyridyl)nitrone, L1, and N-t-butyl-α-(2-pyridyl)nitrone, L2, is reported. The structures of 1 : 1 complexes [HgX2L], X = Cl, L = L1; X = Br, L = L2, 2 : 1 complexes [(HgX2)2L], X = Br or I, L = L1; X = Cl or I, L = L2, and a unique compound [(HgBr2)5(L2)3] have been determined. In the 1 : 1 and 1 : 2 complexes, the ligand L1 adopts the anti conformation, and is either monodentate or bridging, while the ligand L2 adopts the syn conformation and acts as a chelate ligand. In the compound [(HgBr2)5(L2)3] the ligand L2 is present in both syn-chelate and anti-bridging bonding modes. Secondary intermolecular bonding, involving O⋯Hg or X⋯Hg interactions, can lead to association of the molecular compounds to form polymers of several kinds. In solution, the complexes are labile and the crystalline products do not necessarily reflect the reaction stoichiometry.

Graphical abstract: Coordination chemistry of mercury(ii) with 2-pyridylnitrones: monomers to polymers

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Article information

05 Jan 2017
22 Feb 2017
First published
23 Feb 2017

Dalton Trans., 2017,46, 3579-3587
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Coordination chemistry of mercury(II) with 2-pyridylnitrones: monomers to polymers

M. Azizpoor Fard, A. Behnia and R. J. Puddephatt, Dalton Trans., 2017, 46, 3579
DOI: 10.1039/C7DT00050B

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