Structures and properties of mercury(II) coordination polymers

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

“…45 This is as expected because the presence of bulky phen or dmph ligands inhibits aggregation. However, for Hg(phen) 2 Cl 2 a six-coordinate complex with a distorted octahedral geometry was observed. 46 A previous investigation revealed that mercury(II) is capable of forming an extended polymeric structure with 2-[(E)-2-(3-methylphenyl)-1-diazenyl]pyridine in which the ligand is monodentate via the pyridyl nitrogen, while modifying the structure of the ligand by changing the methyl group on the phenyl ring from the m-to the p-position resulted in a dimeric structure in which the 2-[(E)-2-(4-methylphenyl)-1-diazenyl]pyridine ligand is coordinated in a bidentate mode via the pyridyl nitrogen and one of the azo nitrogen atoms.…”

“…The methods employed for the preparation of the dihalomercury(II) complexes (1)(2)(3)(4)(5)(6)(7)(8) (4). A similar synthetic procedure to that used for 1 was used except that aniline was replaced by o-toluidine, giving pale-yellow crystals from acetonitrile solution.…”

“…1 Despite their toxicity, mercury (II) compounds are still being used in various fields, such as in the paper industry, paints, cosmetics, preservatives, thermometers, manometers, energy-efficient fluorescent light bulbs and, to a limited extent, mercury batteries. 2 Nonetheless, reports of mercury compounds are disproportionately scarce compared with those describing zinc and cadmium, including in crystal engineering endeavours. Recent developments in the crystal engineering of metal-organic coordination polymers have produced many novel materials with various structural features and properties.…”

Synthesis and Structure of a Polymeric Homobimetallic Mercury Compound Constructed from (E)-Acetyloxy{4-[(pyridin-2-ylmethylene)amino]phenyl}mercury(II)

“…Consequently, mercury can readily accommodate all kinds of architectures in coordination polymers, including 1D, 2D and 3D topologies [3,4], with 1D coordination polymers occurring more frequently than 3D polymers [4]. Moreover, the effects related to the geometry, size, number of donor atoms and rigidity of ligands, as well as the number and size of anions, are important contributors to the greater number of onedimensional coordination polymers [4].…”

“…Moreover, the effects related to the geometry, size, number of donor atoms and rigidity of ligands, as well as the number and size of anions, are important contributors to the greater number of onedimensional coordination polymers [4].…”