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Spectrophotometric studies on complex formation in dilute benzene solutions of [{Rh(diene)(μ–Cl)}2]–PR3–SnCl2 systems

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Abstract

There is no correlation between the stability of complexes formed in dilute solutions of [{Rh(diene)(μ–Cl)}2]–PR3–SnCl2 systems [with ligand combinations cod+PPh3, nbd+PPh3, cod+PPhMe2 and cod+ PCy3 (Cy=cyclohexyl)] and the possibility of isolating them as solids. In general, high dilution favours the formation of pentacoordinate complexes that decompose upon attempted crystallization. [RhCl(cod)(PPhMe2)2], [Rh(SnCl3)(cod)(PPh3)2], [Rh(SnCl3)(cod)(PCy3)2], [Rh(SnCl3)(cod)(PPhMe2)2] and [Rh(SnCl3)(nbd)(PPh3)2] have been identified in solution, but only the last two, previously known, have been isolated in the solid state. The steric properties of the coordinated phosphine seem to be the most important factor in determining the stabilities of [RhCl(diene)(PR3)2] complexes, whilst in the case of [Rh(SnCl3)(diene)(PR3)2] complexes the steric properties of the phosphine and the diene appear to have similar importance.

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Authors and Affiliations

  1. Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780, Poznan´, Poland

    Wojciech Duczmal, Beata Maciejewska & Elzabieta S´liwin´ska

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  1. Wojciech Duczmal
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  2. Beata Maciejewska
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  3. Elzabieta S´liwin´ska
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Duczmal, W., Maciejewska, B. & S´liwin´ska, E. Spectrophotometric studies on complex formation in dilute benzene solutions of [{Rh(diene)(μ–Cl)}2]–PR3–SnCl2 systems. Transition Metal Chemistry 22, 238–242 (1997). https://doi.org/10.1023/A:1018456206295

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