Syntheses, structures, thermal behavior and solution studies of two types of Hg(II) complexes with [1,3-di(2-methoxy)benzene]triazene

The reaction of [1,3-di(2-methoxy)benzene]triazene, [HL], with Hg(CH3COO)(2) and Hg(SCN)(2) in methanol as solvent, resulted in the formation of [HgL2] (1) and [HgL(SCN)] (2), respectively. These compounds were characterized by means of X-ray diffraction, FT-IR spectroscopy, CHN and TGA-DTA analysis. In the lattice of the compound 1, the mono-nuclear complexes were connected to dimer structure by intermolecular non-classical C-H center dot center dot center dot O hydrogen bonds. Also, weak Hg-eta(2)-arene p-interactions link the dimers into 1D supramolecular chains. The compound 2 is a 2D coordination polymer induced by C-H center dot center dot center dot pi stacking interactions between 1D chains produced by weak Hg-eta(3)-eta(3)-arene pi-interactions. The results of studies of the stoichiometry and formation of complexes of 1 and 2 in methanol solution were found to be in support of their solid state stoichiometry. (C) 2009 Elsevier B.V. All rights reserved.