Ruthenium alkynyl, carbene and alkenyl complexes containing pendant uracil groups: An investigation into the formation of alkenyl-phosphonio complexes

Michael J. Cowley, Jason M. Lynam, Robert S. Moneypenny, Adrian C. Whitwood, Alastair J. Wilson

Research output: Contribution to journalArticlepeer-review

Abstract

The vinylidene complex [Ru(η5-C5H 5)(PPh3)2(CCHUr)][X] (X = PF6, OTf, Ur = uracil) is a versatile precursor for a range of organometallic complexes containing pendant uracil groups. Using appropriate conditions the vinylidene complex may be selectively transformed into alkynyl Ru(-CCUr)(η5- C5H5)(PPh3)2, carbene [Ru(η5-C5H5)(PPh3) 2(C{OMe}-CH2Ur)][X] and alkenyl-phosphonio species [Ru(E-CHC{PPh3}Ur)(η5-C5H 5)(PPh3)2][X]. The synthesis of the related alkenyl-phosphonio complexes [Ru(E-CHC{PPh3}R)(η5- C5H5)(PPh3)2][X] (R = Ph, C 6H4-3-OMe) is described; these undergo a further orthometallation reaction: the mechanism of this latter reaction appears to proceed via dissociation of a ruthenium-bound PPh3 ligand.

Original languageEnglish
Pages (from-to)9529-9542
Number of pages14
JournalDalton Transactions
Issue number43
DOIs
Publication statusPublished - 18 Sep 2009

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