Nickel Metal Complexes Research Articles

η3-Allyl-Stabilized 'Ate Complexes of Nickel, Palladium and Platinum

Organolithium compounds react with the bis- (η3-allyl)metal complexes of nickel, palladium and platinum by addition to give ionic 'ate complexes in which one allyl group has been converted into the η1 -allyl form

Multiple Linear Regression Analysis of the Retention Data for Several Neutral Metal Complexes

Abstract Multiple linear regression analysis for the retention data of neutral metal complexes of nickel, copper and palladium was carried out. Several columns (Microbondapack C18, Partisil-10-ODS, Alltech RP-8) and two ternary (water-methanol-acetonitrile-and water-methanol-tetrahydrofuran) and a quaternary (water-methanol-acetonitrile-tetrahydrofuran) solvent were studied. It was found that the palladium complex behaved differently than the nickel and copper complexes and needed a 21% methanol, 21% acetonitrile, 58% water solvent system in order to elute halfway between the nickel and copper complex.

Evidence for the intermediacy of π-allylic metal complexes in the reaction of allylic halides with grignard reagent in the presence of transition metal halides

The reactions of allyl bromide and crotyl chloride with Grignard reagent catalyzed by π-allyl and crotyl metal complexes of nickel, cobalt, and iron, and the stoichiometric reaction of the complexes with the Grignard reagent have been examined. The similarity in catalytic behaviour of the complex and the corresponding metallic halide affords further evidence in support of the previous proposal that the π-allylic metal intermediate plays an important role in the catalytic reaction. The stoichiometric reaction suggests that the dependence of distribution of product in the catalytic process on the type of both allylic halide and metal is attributable to the facility of ligand exchange between the π-allylic complex and Grignard reagent.