Reactions of ‘GaI’ with organometallic transition metal halides |
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| Authors: | Natalie D Coombs Simon Aldridge |
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| Institution: | a Inorganic Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
b School of Chemistry, Monash University, P.O. Box 23, Victoria 3800, Australia |
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| Abstract: | Two approaches towards the synthesis of phosphine ligated half-sandwich complexes (ηx-CxHx)M(PR3)2GaI2]n containing diiodogallyl ligands have been investigated. Insertion of ‘GaI’ into the Mo-I bond of (η7-C7H7)Mo(CO)2I has been shown to yield the crystallographically characterized dimeric complex (η7-C7H7)Mo(CO)2GaI2]2 (2). Attempts to substitute the carbonyl ligands by the phosphine ligand dppe dppe = bis(diphenylphosphino)ethane] have been shown instead to yield the sparingly soluble complex (η7-C7H7)Mo(CO)2GaI2]2(μ-dppe) (3) in which the phosphine bridges two (η7-C7H7)Mo(CO)2GaI2] units via a pair of P → Ga donor/acceptor bonds. By contrast, attempts to insert ‘GaI’ directly into the metal-halogen bond of phosphine ligated complexes such as (η5-C5H5)Ru(PPh3)2Cl or (η5-C5H5)Ru(dppe)Cl have been shown to result in the formation of the tetraiodogallate species(η5-C5H5)Ru(PPh3)2(μ-I)GaI3 (5) and (η5-C5H5)Ru(dppe)]+GaI4]− (7). |
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| Keywords: | Gallium Insertion Substitution Phosphine ligands Ruthenium Molybdenum |
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