Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines
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 (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(=O)Cl][Cl] (4).
Citation
Clark , E R , Anwar , M U , Leontowicz , B J , Beldjoudi , Y , Hayward , J J , Chan , W T K , Gavey , E L , Pilkington , M , Zysman-Colman , E & Rawson , J M 2014 , ' Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines ' , Dalton Transactions , vol. 43 , no. 34 , pp. 12996-13005 . https://doi.org/10.1039/c4dt01413h
Publication
Dalton Transactions
Status
Peer reviewed
ISSN
1477-9226Type
Journal article
Description
The authors thank the EPSRC (E.R.C.), NSERC (M.P.; J.M.R.; E.Z.-C.) and the Canada Research Chairs program (M.P.; J.M.R.) for financial supportCollections
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