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Zinc(II), Cadmium(II), and Mercury(II) Complexes with the 2, 2′‐Diamino‐4, 4′‐bithiazole (DABTZ) Ligand — Syntheses and X‐Ray Crystal Structure of [Hg(DABTZ)(SCN) 2 ]
Author(s) -
Morsali Ali,
Payheghader Mahmod,
Reza Poorheravi Mohammad,
Jamali Fahimeh
Publication year - 2003
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.200300039
Subject(s) - chemistry , crystallography , hydrogen bond , crystal structure , ligand (biochemistry) , molecule , stacking , infrared spectroscopy , stereochemistry , biochemistry , receptor , organic chemistry
Reaction of the ligand 2, 2′‐diamino‐4, 4′‐bithiazole (DABTZ) with Zn(ClO 4 ) 2 , CdCl 2 , and Hg(SCN) 2 gives complexes with composition [Zn(DABTZ) 2 ](ClO 4 ) 2 , [Cd(DABTZ) 2 Cl 2 ], and [Hg(DABTZ)(SCN) 2 ]. The complexes were characterized by elemental analyses and infrared spectroscopy. The crystal structure of the [Hg(DABTZ)(SCN) 2 ] was determined by X‐ray crystallography. The complex is built up of a monomeric Hg(SCN) 2 unit with one 2, 2′‐diamino‐4, 4′‐bithiazole ligand coordinated to the Hg atom via the two N atoms giving rise to a five‐member chelate ring in a distorted tetrahedral environment. There is π‐π stacking interaction between the parallel aromatic rings belonging to adjacent chain as planar species in which the mean molecular planes are close to parallel and separated by a distance of ∼ 3.5Å, close to that of the planes in graphite. The coordinated 2, 2′‐diamino‐4, 4′‐bithiazole molecule is involved in hydrogen bonding acting as hydrogen‐bond donors with N atoms from the SCN ligand as potential hydrogen‐bond acceptors. The hydrogen bonding yields infinite chains parallel to the crystallographic vectors a and b. Each molecule is bonded to three neighbours. Both amine H atoms are hydrogen bonded to N atoms.