Partenaires et organisations internationales
(Anglais)
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A, B, CH, CZ; CRO, D, DK, F, FIN, GR, H, I, N, NL, PL, S, SK, Sl, UK
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Résumé des résultats (Abstract)
(Anglais)
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The properties and potentialities of metal-carbido species have been examined from a theoretical point of view (C. Floriani et al. Organometallics 2000, 19, 1115 & 1628), studying the electronic communication between carbon chain bridged metals. The synthetic approach has been developed using very reactive metal-oxo surfaces modeled, at the molecular level, by metalla-calix[4]arenes (C. Floriani Chem. Eur. J. 1999, 5, 19). Such an approach allowed the identification of all the steps in the six-electron reduction of carbon monoxide to carbide and oxide (C. Floriani et al. J. Am. Chem. Soc. 2000, 122, 538). An alternative synthetic approach was developed via metalla-alkylidenes and metalla-alkylidynes forming directly from hydrocarbons (C. Floriani et al. J. Am. Chem. Soc. 1999, 121, 2797; Angew. Chem., Int. Ed. 1999, 38, 807; J. Am. Chem. Soc. 1999, 121, 8296). The chemistry/energy relationship has been explored taking advantage of chemical systems capable of storing and releasing pairs of electron via the reversible cleavage of C-C single bonds (C. Floriani et al. Chem. Eur. J. 1999, 5, 2914; Angew. Chem. Int. Ed. 2000, 39, 1685). In this context, molecules functioning as 'molecular batteries' or 'molecular motors' have been identified and are full of interesting perspectives in the chemistry/energy scenario.
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