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Five Coordinated Zinc(II) and Tris‐Chelate Cadmium(II) Complexes with 2,2′‐Diamino‐5,5′‐dimethyl‐4,4′‐bithiazole – Syntheses, Spectroscopic Characterization, and Crystal Structure
Author(s) -
Hosseinian Akram,
Mahjoub Ali Reza
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200600230
Subject(s) - chemistry , denticity , ligand (biochemistry) , chelation , crystal structure , zinc , crystallography , hydrogen bond , stereochemistry , molecule , inorganic chemistry , organic chemistry , biochemistry , receptor
The new synthesized ligand (DADMBTZ = 2,2′‐diamino‐5,5′‐dimethyl‐4,4′‐bithiazole), which is mentioned in this text, is used for preparing the two new complexes [Zn(DADMBTZ) 3 ](ClO 4 ) 2 . 0.8MeOH.0.2H 2 O ( 1 ) and [Cd(DADMBTZ) 3 ](ClO 4 ) 2 ( 2 ). The characterization was done by IR, 1 H, 13 C NMR spectroscopy, elemental analysis and single crystal X‐ray determination. In reaction with DADMBTZ, zinc(II) and cadmium(II) show different characterization. In 2 , to form a tris‐chelate complex with nearly C 3 symmetry for coordination polyhedron, DADMBTZ acts as a bidentate ligand. In 1 , this difference maybe relevant to small radii of Zn 2+ which make one of the DADMBTZ ligands act as a monodentate ligand to form the five coordinated Zn 2+ complex. In both 1 and 2 complexes the $\rm ClO^{-}_{4}$ anions are symmetrically different. 1 and 2 complexes form 2‐D and 3‐D networks via N‐H···O and N‐H···N hydrogen bonds, respectively.