Dichloro(diphosphine)(2-pyridyl-ketone)ruthenium(II) complexes
Abstract
Described are the synthesis and characterization of Ru(II) complexes of the type RuCl2L2(N-O), where L2 is either 1,4-bis(diphenylphosphino)butane (dppb) or (PPh3)2, and N-O represents chelated 2-benzoylpyridine (2-bzpy) or 2-acetylpyridine (2-acpy); the Ru presursors used were [RuCl2(dppb)]2(µ-dppb) or RuCl2(PPh3)3. The crystal structure of cis-RuCl2(dppb)(2-bzpy) is presented, and three other RuCl2L2(N-O) complexes with cis-chlorines are isolated and characterized spectroscopically; of the trans-dichloro species, RuCl2(PPh3)2(N-O) complexes are isolated, while the corresponding dppb species are characterized in situ. In all cases, thermodynamically stable cis-complexes are formed from initially formed trans-species.Key words: ruthenium, phosphines, 2-benzoylpyridine, 2-acetylpyridine, X-ray structures.
Résumé
On décrit la synthèse et la caractérisation de complexes du Ru(II) du type RuCl2L2(N-O) dans lesquels L2 = 1,4-bis(diphénylphosphino)butane (dppb) ou (PPh3)2 et N-O = 2-benzoylpyridine (2-bzpy) ou 2-acétylpyridine (2-acpy) chélatées; les complexes de Ru utilisés sont le [RuCl2(dppb)]2(µ-dppb) ou RuCl2(PPh3)3. On a déterminé la structure cristalline du cis-RuCl2(dppb)(2-bzpy) et on a isolé trois autres complexes du RuCl2L2(N-O) portant des atomes de chlore en cis et on les a caractérisés de façon spectroscopique; des espèces trans-dichlorées, les complexes RuCl2(PPh3)2(N-O) ont été isolés alors que les espèces correspondantes du dppb ont été caractérisées in situ. Dans tous les cas, les complexes cis thermodynamiquement stables se forment à partir des espèces trans obtenues initialement.Mots clés : ruthénium, phosphines, 2-benzoylpyridine, 2-acétylpyridine, structures par diffraction des rayons X.[Traduit par la Rédaction]
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Published In
Canadian Journal of Chemistry
Volume 81 • Number 11 • November 2003
Pages: 1263 - 1269
History
Version of record online: 5 February 2011
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Salete L Queiroz, Alzir A Batista, Marcio P de Araujo, Roberto C Bianchini, Glaucius Oliva, Javier Ellena, and Brian R James. 2003. Dichloro(diphosphine)(2-pyridyl-ketone)ruthenium(II) complexes. Canadian Journal of Chemistry.
81(11): 1263-1269. https://doi.org/10.1139/v03-109
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