Some neutral three-coordinate complexes of mercury(II) halides and pseudohalides with N-methylnicotinamide

Abstract

Coordination compounds of mercury(II) chloride, bromide, cyanide and thiocyanate with N-methylnicotinamide, a potentially bidentate ligand, have been prepared. Thecomplexesisolated have 1: ! (metal:ligand)stoichiometry. Molecular weight measurements in molten camphor indicate that the mercury (ll) chloride and bromide complexes are monomeric. Based on conductance values, molecular weight determinations and infrared spectral data, it is inferred that in the solid state in all these complexes the metal ion has a coordination number three and is bonded to the N-methylnicotinamide via its pyridine ring nitrogen, and is terminally bonded to the halogen/pseudohalogens. Keywords. Mercury(ll) halide and pseudohalide complexes; N-methylnicotinamide complexes; three-coordinate mercury(lit complexes.

Preparation, X-ray Crystallography, and Thermal Decomposition of Some Transition Metal Perchlorate Complexes of Hexamethylenetetramine

“…Hexamethylenetetramine (HMTA) known as urotropine or tetraazaadamantane (taad) in which four nitrogen atoms are situated at the corners of a tetrahedron, is a ligand of polycyclicpolydentate type. In many complexes, it acts as a monodentate or bidentate ligands , and shows nonchelating behavior (in low valent organometallic complexes). It is used for preparing RDX.…”