Compounds of general formula Cu(CF3COO)(olefin) (olefin = cyclooctene (coe), 1,5-cyclooctadiene (cod), diethylfumarate (defu), methylcinnamate (meci)) have been prepared and the molecular structures have been solved by X-ray diffraction in the case of olefin = coe, defu, meci. The complexes are characterized by a dimeric [Cu2(ƒÝƒ{CF3CO2)2(olefin)2] core with bridging trifluoroacetates and a ƒØ2-bonded olefin. In the case of the defu and meci complexes, [Cu2(ƒÝƒ{CF3CO2)2(olefin)2] dimeric units are linked by the oxygen atom of a carbonyl group of the ester to give polymeric chains. The compound [Cu2(ƒÝƒ{CF3COO)2(meci)2]n is the first structurally characterized example of a metal-bonded methylcinnamate. By recrystallization of [Cu2(CF3COO)2(cod)2], a derivative featuring a cod / Cu molar ratio of 0.5 has been isolated and structurally characterized as [Cu2(ƒÝ-CF3COO)2(ƒÝ-cod)]n, which represents the first example of a polymeric metal complex containing a bridging cod ligand. The carbo...
Olefin Trifluoroacetato Derivatives of Copper(I) and Their Olefin/CO Exchange Reaction
PAMPALONI, GUIDO;
2005-01-01
Abstract
Compounds of general formula Cu(CF3COO)(olefin) (olefin = cyclooctene (coe), 1,5-cyclooctadiene (cod), diethylfumarate (defu), methylcinnamate (meci)) have been prepared and the molecular structures have been solved by X-ray diffraction in the case of olefin = coe, defu, meci. The complexes are characterized by a dimeric [Cu2(ƒÝƒ{CF3CO2)2(olefin)2] core with bridging trifluoroacetates and a ƒØ2-bonded olefin. In the case of the defu and meci complexes, [Cu2(ƒÝƒ{CF3CO2)2(olefin)2] dimeric units are linked by the oxygen atom of a carbonyl group of the ester to give polymeric chains. The compound [Cu2(ƒÝƒ{CF3COO)2(meci)2]n is the first structurally characterized example of a metal-bonded methylcinnamate. By recrystallization of [Cu2(CF3COO)2(cod)2], a derivative featuring a cod / Cu molar ratio of 0.5 has been isolated and structurally characterized as [Cu2(ƒÝ-CF3COO)2(ƒÝ-cod)]n, which represents the first example of a polymeric metal complex containing a bridging cod ligand. The carbo...I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
