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, J.M. Rawson

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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 CuS contacts (dCuS = 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(=O)Cl][Cl] (4).

Original languageEnglish
Pages (from-to)12996-13005
Number of pages10
JournalDalton Transactions
Volume43
Issue number34
Early online date9 Jul 2014
DOIs
Publication statusPublished - 14 Sept 2014

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