The synthesis, analytical and spectroscopic characterisation, and reactivity of three new Rh(I)–phenoxide complexes of formula Rh2(m-OPh)2(C2H4)4 (1), Rh(C2H4)2(h5-OPh) (2) and Rh(diphos)(h5-OPh) (4) [diphos1,2-bis(diphenylphosphino)ethane] are reported. Both the h5- and m-(O) modes of bonding have been found. The h5-complexes are quite air-sensitive. The reactivity towards carbon dioxide is described and the formation of an emicarbonate is reported with the O-bonded phenoxide. A ring carboxylation occurs with h5-complexes.
New ƒØ5- and ƒÝ-(O)-Rh(I) phenoxide complexes: synthesis, characterization and unconventional reactivity of ƒØ5-complexes towards carbon dioxide
QUARANTA, Eugenio;DIBENEDETTO, Angela;TOMMASI I.
2000-01-01
Abstract
The synthesis, analytical and spectroscopic characterisation, and reactivity of three new Rh(I)–phenoxide complexes of formula Rh2(m-OPh)2(C2H4)4 (1), Rh(C2H4)2(h5-OPh) (2) and Rh(diphos)(h5-OPh) (4) [diphos1,2-bis(diphenylphosphino)ethane] are reported. Both the h5- and m-(O) modes of bonding have been found. The h5-complexes are quite air-sensitive. The reactivity towards carbon dioxide is described and the formation of an emicarbonate is reported with the O-bonded phenoxide. A ring carboxylation occurs with h5-complexes.File in questo prodotto:
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