Nitrido-ruthenium(VI) and -osmium(VI) complexes containing chelating multianionic (N, O) ligands. Synthesis, crystal structures and reactions with triphenylphosphine

Pui Ming Chan, Wing Yiu Yu, Chi Ming Che, Kung Kai Cheung

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Abstract

A series of nitrido-ruthenium(VI) and -osmium(VI) complexes containing chelating di-, tri- and tetra-anionic ligands was synthesized by ligand substitution reaction in methanol under room conditions in the presence of 2,6-dimethylpyridine. All the newly prepared complexes are air-stable diamagnetic solids. The crystal structures of seven complexes have been established by X-ray crystallography. The Ru≡N (1.615-1.594 Å) and the Os≡N (1.612-1.621 Å) bond distances are rather insensitive to the electron-donating power of the auxiliary ligands. All the nitridoruthenium(VI) complexes react spontaneously with triphenylphosphine, and the intermediate [RuIV(N=PPh3)-L1(py)Cl] has been isolated and characterized spectroscopically for the reaction with [RuVIN(L1)Cl]. However, for those nitridoruthenium(VI) complexes bearing the tri- (L2)3-and tetra-anionic (L3,4)4-ligands, the phosphiniminatoruthenium(IV) intermediate undergoes further reaction with pyrazole to generate a bis(pyrazole)ruthenium(IV) complex as the product.
Original languageEnglish
Pages (from-to)3183-3190
Number of pages8
JournalJournal of the Chemical Society - Dalton Transactions
Issue number19
DOIs
Publication statusPublished - 7 Oct 1998
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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