OBSERVATION OF STABLE 17 e IRON(III) CYCLOPENTADIENYL RADICAL COMPLEXES
The EPR spectra of a series of mononuclear complexes <FONT FACE=Symbol>[ CpFe(dppe)SR]</FONT> PF6R = C6H5 (1), C3H7 (2),p-C6H4Br (3) and the binuclear <FONT FACE=Symbol>[ CpFe(dppe)-S-CH2CH2-S-CpFe(dppe]</FONT> (PF6)2 (4) were measured. All the paramagnetic complexes exhibit...
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
1999
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16441999000300008 |
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| Sumario: | The EPR spectra of a series of mononuclear complexes <FONT FACE=Symbol>[ CpFe(dppe)SR]</FONT> PF6R = C6H5 (1), C3H7 (2),p-C6H4Br (3) and the binuclear <FONT FACE=Symbol>[ CpFe(dppe)-S-CH2CH2-S-CpFe(dppe]</FONT> (PF6)2 (4) were measured. All the paramagnetic complexes exhibit intense signals in both solid state as well as in CH2Cl2solution. Analysis of the spectra indicates a pseudooctahedral structurefor the complexes except for complex (2) for which a tetragonaldistortion in solid state was observed. Some degree of delocalization ofthe unpaired electron for (3) and (4) was suggested. The stabilization of the radicals by the thiolate ligands is discussed |
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