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Dinuclear Ruthenium(II) Carbonyl Complexes Doubly Bridged by a Bromine Atom and a C5H3N-2-C(O)CH2-6-CH2 (Q) Group. Crystal Structures of Ru2(μ-Br)(μ-Q)Br(CO)4(PPh3)(MeOH) and Ru2(μ-Br)(μ-Q)Br(CO)3(PPh3)2

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Abstract

The oxidative addition reaction of 2,6-bis(bromomethyl)pyridine to Ru3(CO)12 gave scarcely soluble {Ru2Br2(μ-Q)(CO)4} n , 1, [Q=C5H3N-2-C(O)CH2-6-CH2] or a mixture of 1 and the mononuclear complex RuBr(Q′)(CO)3, 2, [Q′=C5H3N-2-C(O)CH2-6-CH2Br] according to the reactant's mole ratio. Further reactions of 1 with some N- and P-donor ligands (L) afforded readily soluble dinuclear complexes, Ru2(μ-Br)(μ-Q)Br(CO) n (L) m [n=4, m=1, L=PPh3 3a, or py 3b; n=3, m=2, L=PPh3 5a, or PPh2(o-tolyl) 5b]. In this paper, the characterization of these products by the elemental analyses and the spectroscopic methods are described. The X-ray crystal structures of Ru2(μ-Br) (μ-Q)Br(CO)4(PPh3)(MeOH), 4, which was obtained by crystallization of 3a from MeOH, and of 5a · (2CHCl 3 ) are also described. Each of the metal atoms in 4 has a distorted octahedral coordination, while in 5a · (2CHCl 3 ) one metal atom takes a distorted octahedral geometry and the other pseudooctahedral, which is completed by presenting a Ru ··· Br secondary bonding interaction.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Osaka City University, Sugimoto-3, Sumiyoshi-ku, Osaka, 558-8585, Japan

    Hiroaki Saito, Kousuke Inoue, Keiji Matsumoto, Makoto Tadokoro & Yukio Nakamura

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  1. Hiroaki Saito
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  2. Kousuke Inoue
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  3. Keiji Matsumoto
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  4. Makoto Tadokoro
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  5. Yukio Nakamura
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Saito, H., Inoue, K., Matsumoto, K. et al. Dinuclear Ruthenium(II) Carbonyl Complexes Doubly Bridged by a Bromine Atom and a C5H3N-2-C(O)CH2-6-CH2 (Q) Group. Crystal Structures of Ru2(μ-Br)(μ-Q)Br(CO)4(PPh3)(MeOH) and Ru2(μ-Br)(μ-Q)Br(CO)3(PPh3)2 . Journal of Cluster Science 9, 145–164 (1998). https://doi.org/10.1023/A:1021990016044

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