Novel coordination modes of partially hydrogenated diyne ligands on metal carbonyl clusters

Lionel P. Clarkc, John E. Davics, Paul R. Raithby, Gregory P. Shields

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16 Citations (Scopus)

Abstract

The reaction of [Ru4H4(CO)12] with the 1, 3-diynes RC2C2R (R = Me, SiMe3 or Ph) under reflux conditions, in heptane, yielded the tetraruthenium clusters [Ru4(CO), 2{n4-n'lI-(RCH2C3R)}] 1 and [Ru4(CO)I2{H4-Tl2:i2[RC(H)C]2}] 2 (R = Me a, SiMe3 b or Ph c) in good yield. In 1 a 1, 1-dihydrogenation occurs to generate an allene-1, 3diyl ligand, which coordinates to the butterfly Ru4 face in a novel n/ : n12: r12: r mode, whereas in 2 a 1, 4-dihydrogenation occurs to yield a l, 3-diene-2, 3-diyl ligand bound to the Ru4 butterfly via four C atoms in a r)2:1:1:!!2 mode. In addition, the trinuclear cluster [Ru3(u-H)(CO)9{r2:n2:nI-[RCH2C2CHPh)] 3c (R = Ph) is produced as a result of 1, 1, 4 trihydrogenation of the diyne and loss of one ruthenium vertex. The clusters have fully been characterised SDectrosconicallv. and the crvstal structures of la.lc 2a.2c and 3c determined.

Original languageEnglish
Pages (from-to)4527-4533
Number of pages7
JournalJournal of the Chemical Society, Dalton Transactions
Issue number24
DOIs
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Chemistry(all)

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