The monocarbonyl complexes of (phthalocyaninato)iron(II), FePc(CO)L, where L = NJVdiethylacetamide, pyridine, piperidine, hexamethylphosphoramide, and triphenylphosphine oxide, have been prepared and characterized, as has the dicarbonyl compound FePc(CO)2, which was isolated after exposing FePc in a hydrocarbon solvent to a high pressure of CO. The Mossbauer spectroscopic parameters, AEQ and 6, both decrease upon replacement of an axial ligand of the bisadducts, FePcL2, by CO to give FePc(C0)L. These changes are consistent with a decrease in mean axial bond distances upon carbonylation and a concomitant increase in s-electron density along the z axis. The electronic basis of these structural modifications requires consideration of both cis and trans effects.
SYNTHESIS AND MOSSBAUER SPECTROSCOPIC STUDIES OF CARBONYL DERIVATIVES OF (PHTHALOCYANINATO)IRON(II)
CALDERAZZO, FAUSTO;PAMPALONI, GUIDO;
1982-01-01
Abstract
The monocarbonyl complexes of (phthalocyaninato)iron(II), FePc(CO)L, where L = NJVdiethylacetamide, pyridine, piperidine, hexamethylphosphoramide, and triphenylphosphine oxide, have been prepared and characterized, as has the dicarbonyl compound FePc(CO)2, which was isolated after exposing FePc in a hydrocarbon solvent to a high pressure of CO. The Mossbauer spectroscopic parameters, AEQ and 6, both decrease upon replacement of an axial ligand of the bisadducts, FePcL2, by CO to give FePc(C0)L. These changes are consistent with a decrease in mean axial bond distances upon carbonylation and a concomitant increase in s-electron density along the z axis. The electronic basis of these structural modifications requires consideration of both cis and trans effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
