Mol-ecular structure of tris-[(6-bromo-pyridin-2-yl)meth-yl]amine.

Coordination compounds of polydentate nitro-gen ligands with metals are used extensively in research areas such as catalysis, and as models of complex active sites of enzymes in bioinorganic chemistry. Tris(2-pyridyl-meth-yl)amine (TPA) is a tripodal tetra-dentate ligand that is known to form coordination compounds with metals, including copper, iron and zinc. The related compound, tris-[(6-bromo-pyridin-2-yl)meth-yl]amine (TPABr), CHBrN, which possesses a bromine atom on the 6-position of each of the three pyridyl moieties, is also known but has not been heavily investigated.

Crystal structure of tetra-kis-(μ-2-hy-droxy-3,5-di-isoprop-yl-benzoato)bis-[(dimethyl sulfoxide)copper(II)].

Metal complexes of 3,5-diiso-propyl-salicylate are reported to have anti-inflammatory and anti-convulsant activities. The title binuclear copper complex, [Cu(CHO)(CHOS)] or [Cu(II)(3,5-DIPS)(DMSO)], contains two five-coordinate copper atoms that are bridged by four 3,5-diiso-propyl-salicylate ligands and capped by two axial dimethyl sulfoxide (DMSO) moieties. Each copper atom is attached to four oxygen atoms in an almost square-planar fashion, with the addition of a DMSO ligand in an apical position leading to a square-pyramidal arrangement.

Catalytic reduction of carbon dioxide by a zinc hydride compound, [Tptm]ZnH, and conversion to the methanol level.

The zinc hydride compound, [Tptm]ZnH, may achieve the reduction of CO by (RO)SiH (R = Me, Et) to the methanol oxidation level, (MeO)Si(OR), the formate species, HCOSi(OR). However, because insertion of CO into the Zn-H bond is more facile than insertion of HCOSi(OR), conversion of HCOSi(OR) to the methanol level only occurs to a significant extent in the absence of CO.

Synthesis of bis(2-pyridylthio)methyl zinc hydride and catalytic hydrosilylation and hydroboration of CO.

The reactions of bis(2-pyridylthio)methane with MeZn and Zn[N(SiMe)] afford [Bptm]ZnMe and [Bptm]ZnN(SiMe), thereby providing access to a variety of other [Bptm]ZnX derivatives, including the zinc hydride complex [Bptm]ZnH, which serves as a catalyst for the reduction of CO and other carbonyl compounds hydrosilylation and hydroboration.

Rhenium cadmium: an alternative structure for a thermally stable cadmium carbonyl compound.

An alternative description is provided for the previously reported novel tetranuclear cadmium carbonyl compound, [Cd(CO)(CHCl)]. Specifically, consideration of single crystal X-ray diffraction data indicates that the compound is better formulated as the rhenium compound, [Re(CO)(CNHS)]. Furthermore, density functional theory calculations predict that, if it were to exist, [Cd(CO)(CHCl)] would have a very different structure to that reported.