FE (II) - FE (III) ELECTRONIC AND MAGNETIC INTERACTION THROUGH A THIOPYRIDINE BRIDGE
Reaction of CpFe(dppe)I with dithiopyridine in methanol and in presence of NH4PF6 affords the new mixed valence complex {[CpFe(dppe)]2 -<FONT FACE=Symbol> m</FONT> - S - Py}(PF6)2 (1). Observation of an intervalence electron transfer affords the Hush parameters that permit to classify th...
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| Autores principales: | , , , |
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2000
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442000000200020 |
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| Sumario: | Reaction of CpFe(dppe)I with dithiopyridine in methanol and in presence of NH4PF6 affords the new mixed valence complex {[CpFe(dppe)]2 -<FONT FACE=Symbol> m</FONT> - S - Py}(PF6)2 (1). Observation of an intervalence electron transfer affords the Hush parameters that permit to classify this compound as a type II Robin Day complex. The electron transfer across the pyridinethiolate ligand occurs at a rate estimated to be about 106 seg-1. Variable - temperature magnetic susceptibility measurements have been carried out in the range of 5-300 °K. Results can be interpreted as principally due to weak intermolecular antiferromagnetic interactions between Fe (II) - Fe (III) dimers in the solid state |
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