Synthesis and structural characterization of some tetraosmium carbonyl clusters incorporating pyridyl type ligands; mass spectrometric studies of the water soluble cationic tetraosmium carbonyl cluster [Os4(μ-H)4(CO)10(dppH)]+[dpp = 2,3-bis-(2-pyridyl)pyrazine] by electrospray techniques

Ya Yin Choi, Wing Tak Wong

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The reactions of the activated tetraosmium carbonyl cluster [Os4(μ-H)4(CO)10(NCMe)2] 1 with some pyridyl-containing ligands, namely, 2,2′-bipyrimidine (bpm), 2,3-bis(2-pyridyl)pyrazine (dpp) and 2,3′-bis(2′-pyridyl)-5,6-dimethylquinoxaline (dpq), gave the new clusters: [Os4(μ-H)4(CO)10(bpm)] 2, [Os4(μ-H)4(CO)10(dpp)] 3 and [Os4(μ-H)4(CO)10(dpq)] 4, respectively. The molecular structures of clusters 2, 3 and 4 were established by X-ray diffraction analysis. Compound 3 underwent protonation to give the corresponding water soluble cationic cluster [Os4(μ-H)4(CO)10(dppH)]+5 which has been characterized by positive-mode electrospray mass spectrometric analysis of the aqueous phase. Incorporation of compound 3 as a building block in the heterometallic supramolecular system has also been established.
Original languageEnglish
Pages (from-to)331-337
Number of pages7
JournalJournal of the Chemical Society - Dalton Transactions
Issue number3
Publication statusPublished - 7 Feb 1999
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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