Syntheses and molecular structures of ruthenium carbonyl complexes containing 1,2-naphthoquinone-1-oximate ligands

Kenneth Ka Hong Lee, Wing Tak Wong

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The reaction of [Ru3(CO)12] with 1-nitroso-2-naphthol (referred to as 1,2-naphthoquinone-1-oxime, Hnqo) in tetrahydrofuran (thf) at room temperature gave two isomeric mononuclear complexes, trans-[Ru{η2-N(O)C10H6O} 2(CO)2] 1a and cis-[Ru{η2-N(O)C10H6O}2(CO) 2] 1b. Compound 1b could be converted to 1a quantitatively in acidic media. Reaction of 1a with acetylpyridine in the presence of trimethylamine N-oxide afforded trans-[Ru{η2-N(O)C10H6O} 2{NC5H4C(O)CH3}(CO)] 2 in which one of the carbonyls was replaced by an acetylpyridine moiety. Similarly, complex 3, trans-[Ru{η2-N(O)C10H6O} 2(NCMe)(CO)] was also obtained in high yield if acetonitrile was used instead of the acetylpyridine. When the reaction of [Ru3(CO)12] and 1-nitroso-2-naphthol was carried out in refluxing thf for 1 h, two minor products [Ru3(μ-η3-ONC10H6O) 2(CO)8] 4 and [Ru3(μ-η2-N(H)C10H6O) {μ-η2-N(H)C10H4(O)NOC10H 6}(CO)8] 5 were isolated in addition to 1a and 1b. Clusters 4 and 5 consisted of an open triruthenium metal core with the two nqo ligands (in 4) and two quinone-imine type ligands (in 5) bridging the open edge in a μ-η3 and a μ-η2-manner respectively.
Original languageEnglish
Pages (from-to)2987-2995
Number of pages9
JournalJournal of the Chemical Society - Dalton Transactions
Issue number17
Publication statusPublished - 7 Sep 1997
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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