Solvent effect on the oxidative addition of HS-C6H4Br to CpFe(dppe)+; a reaction involving an Fe-S intramolecular electron transfer
Author
dc.contributor.author
Diaz, Carlos
Author
dc.contributor.author
Montecinos, Rodrigo
Admission date
dc.date.accessioned
2018-12-20T14:11:12Z
Available date
dc.date.available
2018-12-20T14:11:12Z
Publication date
dc.date.issued
1997
Cita de ítem
dc.identifier.citation
Boletin de la Sociedad Chilena de Quimica, Volumen 42, Issue 4, 2018, Pages 513-518
Identifier
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03661644
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/154505
Abstract
dc.description.abstract
The solvent effect on the oxidative addition reaction of p-Br-C6H4-SH to CpFe (dppe)I dppe=Ph2P(CH2)2PPh2, was studied by UV-visible spectroscopic methods. In solvents with high dielectric constants as propanediol-1,2-carbonate, formamide and N-methylformamide the product (CpFe(dppe)-SR)PF6 was observed, while that in most lower dielectric constants solvents as dichloromethane, chloroform, acetonitrile or dimethylsulfoxide no reaction or decompositions was observed. It was demonstrated that the solvent effect arises mainly from the Fe-1 bond ionization of the CpFe(dppe)I precursor to give the reactive fragment CpFe(dppe) (solv)+. A probable mechanism involving the electron transfer step [CpFeII(dppe)-S(H)R]+ → [CpFeIII(dppe)-SR]+ is discussed.