Accession Number : ADA137252
Title : Alkane Soluble Transition Metal Complexes.
Descriptive Note : Final rept. 15 Apr 79-6 Oct 83, Semiannual rept. no. 3, 7 Apr-6 Oct 83,
Corporate Author : ROYAL MILITARY COLL OF SCIENCE SHRIVENHAM (ENGLAND) DEPT OF CHEMISTRY AND METALLURGY
Personal Author(s) : Hartley,F R
Report Date : Oct 1983
Pagination or Media Count : 151
Abstract : A series of tertiary phosphines and tertiary phosphine oxides containing long alkyl chains have been synthesized. As expected they are very soluble in non-polar solvents, particularly hydrocarbons. As a consequence it is difficult to separate these compounds from intermediates and by-products formed during their synthesis. Accordingly it is necessary to purify all the reactants and to use reactions that give a minimum of side products. The same remarks apply to the synthesis of the transition metal complexes of these ligands. The transition metal complexes of the tertiary phosphine ligands have been prepared with rhodium(I), palladium(O), palladium(II), platinum(O) and platinum(II). All are very soluble in non-polar organic solvents. This extreme solubility modifies the catalyticproperties of these complexes in homogeneous solution, as demonstrated by the enhanced ratio of normal: branched aldehyde formed in the hydroformylation of 1-hexene in the presence of (RhC1(CO)L2) when para-alkyl groups are present on the triarylphosphine L. The value of extreme solubility on the catalytic properties of the resulting complexes is particularly well demonstrated by the ability of the platinum(II) complexes (PtL2C12) together with tin(II) chloride to promote the partial hydrogenation of the polyolefins methyl linoleate and methyl linolenate to the corresponding monoolefins wtih high selectivity.
Descriptors : *Metal complexes , *Solubility , *Alkanes , Transition metals , Chains , Alkyl radicals , Phosphine , Catalysis , Synthesis(Chemistry)
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE