Group 11 Complexes with Imidazoline‐2‐thione or Selone Derivatives

Abstract

The reactions of the organodichalcogenone ligands Bbit[1,1′‐(butane‐1,4‐diyl)bis(3‐methylimidazoline‐2‐thione)],Mbis [1,1′‐methylenebis(3‐methylimidazoline‐2‐selone)], Ebis [1,1′‐(ethane‐1,2‐diyl)bis(3‐methylimidazoline‐2‐selone)] and Pbis [1,1′‐(pentane1,5‐diyl)bis(3‐methylimidazoline‐2‐selone)] with gold(I/III), silver(I) and copper(I) have been studied by elemental analysis, multinuclear (1H, 13C, 19F, 31P and 77Se) NMR spectroscopy and for several products obtained the molecular structures were also established by single‐crystal X‐ray diffraction analysis. In most cases the organodichalcogenone coordinates to two metallic fragments as a bidentate bridging ligand but the ligand Mbis coordinates to silver(I) in an unprecedented tetradentate bridging‐chelate mode.

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

“…(Au-Se av = 2.441 Å) are comparable to the distances observed in the gold complexes containing selone ligands[66][67][68]. The Au-Se distances (2.4391(6) and 2.4427(6) Å) in complex 2, which are longer than those of in Au(I) complex [AuCl(SeUr)] (Ur = NHC-derived selenoureas ligands) (2.353-2.398 Å)[67] and [Au 2 {SeC 6 H 4 (CH 2 -NMe 2 )-2} 2 (l-dppf)] (2.4245(5) and 2.4250(8) Å)[68].As shown in theFig.…”

Dinuclear copper(i) complexes with N-heterocyclic thione and selone ligands: synthesis, characterization, and electrochemical studies

“…Instrumentation. 19 F{ 1 H} NMR spectra were externally referenced to CCl 3 F (δ 0 ppm). 1 H and 13 C{ 1 H} NMR chemical shifts (δ) are reported in ppm relative to tetramethylsilane (TMS) and referenced to solvent.…”

“…These reduction potentials are highly dependent upon S/Se ligand coordination and can be tuned in a wide potential range using a variety of monodentate and bidentate thione and selone ligands. 1) have been synthesized and characterized using elemental analysis, infrared (IR) and multinuclear ( 1 H, 13 C, 19 F, 77 Se) NMR spectroscopies, single-crystal X-ray diffraction, electrospray ionization mass spectrometry, and cyclic voltammetry. 2,26 Homoleptic and heteroleptic copper(I) complexes bearing monodentate (dmit or dmise) or bidentate (Bmm Me , Bsem Me , Bme Me , Bsee Me ) chalcogenone ligands ( Fig.…”

Coinage metal complexes of selenoureas derived from N-heterocyclic carbenes

“…The coordination chemistry of selenoureas with silver has received rather less attention than that of copper. Gimeno has disclosed a tetranuclear silver complex supported by PPh3 ligands and three bidentate imidazolyl-2-selone ligands, 41 and Thöne has reported [Ag(SeC(NH2)2{µ-SeC(NH2)2}2]2. 42 Recently, Ritch reported the coordination chemistry of ligands 1 and 4 with AgOTf and AgNO3, leading…”