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Issue 34, 2014
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Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines

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Abstract

Reaction of the novel ligand 3-(2′-pyridyl)-benzo-1,2,4-thiadiazine (L) with the transition metal chloride salts MCl2·xH2O (MII = Mn, Fe, Co, Cu and Zn) in a 2 : 1 mole ratio afforded the mononuclear octahedral (high spin) complexes L2MCl2 (1a–1e respectively) in which L binds in a chelate fashion via N(2) and the pyridyl N atoms. In the case of CuCl2 the intermediate 1 : 1 four-coordinate complex LCuCl2 (2) was also isolated which adopts a polymeric structure with pseudo-square planar molecules linked via long Cu⋯S contacts (dCu⋯S = 2.938(1) Å) in the apical position. In the presence of non-interacting ions, 3 : 1 complexes are isolated, exemplified by the reaction of L with Fe(CF3SO3)2 in a 3 : 1 ratio which affords the low spin complex [L3Fe][CF3SO3]2 (3). Reaction of L with VCl3 in a 2 : 1 mole ratio under aerobic conditions afforded the vanadyl complex [L2V([double bond, length as m-dash]O)Cl][Cl] (4).

Graphical abstract: Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines

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Publication details

The article was received on 13 May 2014, accepted on 06 Jul 2014 and first published on 09 Jul 2014


Article type: Paper
DOI: 10.1039/C4DT01413H
Citation: Dalton Trans., 2014,43, 12996-13005
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    Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines

    E. R. Clark, M. U. Anwar, B. J. Leontowicz, Y. Beldjoudi, J. J. Hayward, W. T. K. Chan, E. L. Gavey, M. Pilkington, E. Zysman-Colman and J. M. Rawson, Dalton Trans., 2014, 43, 12996
    DOI: 10.1039/C4DT01413H

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