Showing papers by "Louis J. Farrugia published in 1990"
TL;DR: In this paper, the authors review compounds containing polyhedral, linked polyhedral or planar arrangements of three or more directly bonded metal atoms, which are considered as clusters and compounds containing more open structures and chain structures.
Abstract: Publisher Summary This chapter reviews compounds containing polyhedral, linked polyhedral or planar arrangements of three or more directly bonded metal atoms, which are considered as clusters and compounds containing more open structures and chain structures. One underlying reason for the interest in heteronuclear clusters lies in their potential for site-specific reactivity at chemically differing metal atoms. The stoichiometry of the products is not rational, and the mechanisms clearly are very complicated, though once again these reactions, under experimental optimization, can provide very useful synthetic routes. An important consequence of the nonutilization of tangential orbitals is that platinum clusters often do not obey the normal electron counting rules and appear to be electron deficient. Clusters with chemically inequivalent hydrides often show hydride exchange. Several fluxional processes have been reported that imply some metal framework rearrangement. Isomerizations involving metal core rearrangements that are not fast on the nuclear magnetic resonance (NMR) time scale have also been observed. A few examples of tetranuclear species and several clusters containing platinum and two or more different metal atoms are reported. The metal–metal separations show considerable variation, and this has been attributed to the asymmetrical ligand distribution. Despite the general interest in bimetallic catalysts, there have been relatively few reports on catalysis by hetero-Pt clusters, either in the homogeneous phase or as supported catalysts.
61 citations
TL;DR: In this article, the reaction between InCl3 and one equivalent of K[Co(CO)3(PPh3)] affords the complex [InCl2(PCP3{Co(Co)4}] (8), which
22 citations
TL;DR: In this article, it was shown that the chiral metal complex Pt(Ru{sub 3}Pt({mu}-H){l brace}{mu}{sub 4}-{eta}{sup 2}-C{triple bond}C(t-Bu){r brace}(CO){sub 9}){sub 2} (5) in 40-50% yield.
19 citations
TL;DR: The variable temperature 1H, 13C and 31P NMR spectra of the phosphine-substituted clusters Os3(μ-H)2(CO)9(L) were reported in this paper.
16 citations
TL;DR: In this article, the reaction between InCl and Mo 2 (CO) 6 (η-C 5 H 5 ) 2 ] affords [InCl&{;Mo(CO) 3 (ε, ε)-C 5H 5 )&};], 6a which has been characterised as a THF adduct by X-ray crystallography.
12 citations