New linked di-germanocenes and di-stannocenes

Rouzaud, J; Joudat, M; Castel A; Delpech, F; Riviere, P; Gornitzka, H; Manriquez, JM; Chavez, I

Abstract

New bridged di-germanocenes and di-stannocenes 2 have been synthesized from a reaction between (pentamethylcyclopentadienyl)metal chloride and the dilithium salts of the corresponding linked cyclopentadienyl ligands (spacer: phenylene, biphenylene, thiophene) in good yields. These di-metallocenes react easily with catechol giving preferentially the substitution reaction. With iodine or with metal 14 dichloride (M = Ge, Sn), the oxidative products are unstable and rapidly loose the linked cyclopentadienyl ligand. Starting from SnCl2, the ionic half-sandwich compound [Cp*Ge][SnCl3] 8, so obtained, was characterized by X-ray diffraction analysis which reveals a polymeric form in the solid state. The reaction of the di-germanocenes with o-quinone leads to the expected cycloadducts, stable in the case of permethylated compounds. An unusual single electron transfer reaction takes place with [Cp2Fe][BF4] and the transient cation radical rapidly gives [Cp*Ge][BF4]. Mass spectra measurements and electrochemistry study confirm the weak stability of this cationic species. © 2002 Published by Elsevier Science B.V.

Más información

Título según WOS: New linked di-germanocenes and di-stannocenes
Título según SCOPUS: New linked di-germanocenes and di-stannocenes
Título de la Revista: JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volumen: 651
Número: 01-feb
Editorial: ELSEVIER SCIENCE SA
Fecha de publicación: 2002
Página de inicio: 44
Página final: 51
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0022328X02012214
DOI:

10.1016/S0022-328X(02)01221-4

Notas: ISI, SCOPUS