Gold complexes containing organoselenium and organotellurium ligands

A review on the chemistry, coordination, structure and biological properties of 1-(acyl/aroyl)-3-(substituted) thioureas

“…This behavior resemble that encountered for the analogues 1-acyl-3-substituted selenoureas recently reviewed by Molter et al [285] and Molter and Mohr. [286] Similarly, for the related N-phosphorylated thioureas RNHC(S)NHP(O)(OR) 2 , the first example of coordination through the sulfur atom was the only found for Pd(II) complexes, as reported by Safin et al [287] A series of 1-furoyl 3-mono-and 3,3-di-substituted thioureas were used as ligands with Cd(II) and Hg(II) d 10 metal ions. [288] Coordination through the sulfur atom of the thiocarbonyl group was observed in both series of thioureas studied, characterized by an intense low-frequency Raman signal located between 230 and 300 cm −1 , which was assigned to the metal-sulfur stretching mode in the complex.…”

The chemistry of trityl isoselenocyanate revisited: A preparative and structural investigation

“…From the molecular structure it is immediately apparent that the compound is indeed the isoselenocyanate and not the selenocyanate as was suggested by Rheinboldt and de Campos [7]. Based on the C-N distance of 1.458(3) Å, which is typical for a nitrogen-carbon-single bond, an ionic structure [Ph 3 [8]. These rather short bond distances are indicative of the strong p-interactions between the three atoms of the NCSe unit.…”

“…In our laboratories we are studying various aspects of the coordination chemistry of these types of organoselenium compounds with both transition-and main-group-metals, and have previously reported some results with gold [1][2][3]. Isoselenocyanates are generally prepared in a one-pot procedure from the corresponding formamides, phosgene and Se metal in the presence of a base [4].…”

Synthesis, characterization and catalytic activity of gold complexes with pyridine-based selone ligands

“…Reports about transition metal complexes with imidazoline-2-chalcogenone ligands have been reported within past few years [44][45][46][47][48][49]. And the catalytic activities of these complexes are comparable with the most efficient metal-NHC complexes for organic transformation [50][51][52].…”