Pyridine complexes of mercury(ii)halides: Implications of a soft metal center for crystal engineering.

The influence of counter ion and ligandmethyl substitution on the solid-state structures and photophysical properties of mercury(ii) complexes with (E)-N-(pyridin-2-ylmethylidene)arylamines

“…40,41 The solid-state structures of mercury(II) halide complexes with N-donor organic ligands (monodentate) have been thoroughly studied both by spectroscopic methods as well as by X-ray crystallography, which have demonstrated a broad variety of binding modes according to the characteristics of the ligands. [42][43][44] It is well known that mercury(II) is capable of forming various coordination modes with N,N-donor atoms when suitable ligands such as bipyridine (bpy), phenanthroline (phen) and their derivatives, e.g. 2,9-dimethyl-1,10-phenanthroline (dmph), are employed.…”

Crystal structure of diiodido-bis(phenanthridine-κN)cadmium(II), CdI2(C13H9N)2, C26H18CdI2N2

“…[7][8][9][10]. In most cases, zinc (II) derivatives form mononuclear tetrahedral complexes, whereas the higher homologue cadmium(II) yields chain polymers [7][8][9][10]. Different from the chain polymers of most reported CdX 2 L 2 , the title compound is a mononuclear tetrahedral complex.…”

“…For group 12 (IIB) metal halides and pyridine-type ligands, the reported hybrid materials generally have a formal composition [MX 2 (L) 2 ], where M represents a divalent metal cation (Zn, Cd, Hg), X a halogen ligand (Cl, Br, I), L a pyridine derivative such as pyridine, pyrazine or bipyridine, etc. [7][8][9][10]. In most cases, zinc (II) derivatives form mononuclear tetrahedral complexes, whereas the higher homologue cadmium(II) yields chain polymers [7][8][9][10].…”

Structures and trends of one-dimensional halide-bridged polymers of five-coordinate cadmium(ii) and mercury(ii) with benzopyridine and -pyrazine-type N-donor ligands

“…5 Even though a fair number of potential applications ascribed to coordination polymers can be extrapolated to halide-bridged polymers of metal cations with organic donor ligands, and although the halide-bridged polymeric scaffold has earned its synthon status, 6 this subdivision is structurally uncharted. The study of halide-bridged polymers of divalent d 10 metal cations with N-donor ligands is by no means a solitary endeavour and recent efforts by Englert and coworkers [6][7][8][9] and Mahmoudi and Morsali 10 have contributed greatly to the enrichment of our current understanding of these compounds through excellent research papers and the addition of numerous structures to the structural data bank. Comprehensive review articles are also available.…”

“…[11][12][13] The work presented in this article aims to build on this knowledge. The focus of both Englert et al 6,8,9 and Mahmoudi and Morsali 10 was on the effect of electronically modified pyridine/pyrazine-derived N-donor ligands on the structural type presented by the coordinated halide-bridged chain. As a natural progression, in this paper, we investigate the role of the electronic nature and spatial extension of the organic ligand in the one-dimensional (1D) halide-bridged chain by taking benzo-substituted pyridine/pyrazine-type organic ligands of different widths into consideration.…”