In tetracoordinate cobalt(I) halide compounds CoX(Ph2P OH)(PMe3)2 (X = Cl, Br) o-phosphanylphenols Ph2P OH are coordinated as phosphane ligands. In the presence of base chelating anions Ph2P O give rise to pentacoordinate complexes Co(Ph2 P O)(PMe3)3. Molecular structures are presented for both types of compounds. The five-membered chelate ring in Co(Ph2P O)(PMe3)3 is resistant to protonation, ...

A ll transition metals are highly toxic to life at low levels, but at the same time some, such as manganese, iron, cobalt, nickel, copper, zinc and molybdenum, are essential micronutrients needed to catalyse key enzymatic reactions. To survive, living organisms have had to evolve mechanisms that either remove such metals from their bodies or detoxify and make use of them metabolically. Many of ...

The chemical procedure was formerly achieved by the preliminary formation of aryl-lithium reagents followed by transmetallation with zinc halides. Nevertheless, this method is not easily achieved with aryl compounds bearing reactive functional groups such as ketone, nitrile or ester, since very low reaction temperatures are required. Alternatively, the Rieke method, which uses activated zinc ob...

Supported gold nanoparticles (NPs), which are well-known epoxidation catalysts, were found to be exceptionally active for the selective deoxygenation of epoxides into alkenes using cheap and easily accessible CO and H(2)O as the reductant.

The title compound, [WCl(2)(C(9)H(10)N(2)S(2))(CO)(3)], is a hepta-coordinate tungsten(II) complex with a capped-octa-hedral coordination sphere in which one CO ligand caps a face formed by a chloro ligand and the two other carbonyls. The chloro ligands are mutually trans positioned at an angle of 156.98 (7)°. The chelating bis-(4-methyl-1,3-thia-zol-2-yl)methane ligand coordinates with the imi...

Mono- and bimetallic complexes of nickel supported by a terphenyl diphosphine have been synthesized. The reported complexes show diverse metal-arene interactions in the solid state. Reactions of an o,o'-biphenyldiyl dinickel complex with CO and dichloroalkanes lead to fluorene derivatives, indicating the formation of carbon-carbon bonds at a bimetallic moiety.