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  • Author: W. Holle x
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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

Ethylene has been shown to insert into the nickel-carbon bond of [Ni(acac)(R)(PR3)] complexes to give new nickel-alkyl complexes

The structure of the compounds formed upon reacting Fe(Pri 2P(CH2)nPPri 2)Cl2 (n = 1-3) and active-Mg with acyclic and cyclic 1,3-, 1,4- and 1,5-dienes depends upon the nature of the diene and upon the length of the methylene-chain bridging the two P-atoms of the bidentate ligand. For example, isoprene reacts to give either (η4-isoprene)2FePPri 2C2H4PPri 2 or (η4-isoprene)Fe(Pri 2PC3H6PPri 2) while the products of the reaction with 1,5-hexadiene are (η5-1-methylpentadienyl)Fe(Pri 2PC2H4PPri 2)H or (η22-1,5-hexadiene)Fe(Pri 2PC3H6PPri 2). The crystal structures of the last two compounds have been established by X-ray diffraction. The penultimate species catalyses the linear dimerization of 1,5-hexadiene.