CNR Institutional Research Information System

The heterobimetallic CpFe(eta5:eta5-as-indacenediide)RhL2 complexes (L2 = COD (2), NBD (3), (ethylene)2 (4)) have been obtained from metalation of the mononuclear lithium CpFe-(eta5-as-indacenediide) with [Rh(mu-Cl)L2]2. Mixtures of syn and anti heterobimetallic complexes were formed and fully characterized by 2D NMR spectroscopy. The reactivity at the rhodium center is greatly influenced by the presence of the ferrocenyl moiety. The voltammetric behavior and the optical spectra are in favor of the existence of significant electronic interactions between the two metals.

Heterobimetallic Iron-Rhodium Complexes. Synthesis and Characteristics of CpFe(mu-eta5:eta5-as-indacenediide)RhL2 (L2 = COD, NBD, (ethylene)2)

Crociani L;Venzo A
2002

Abstract

The heterobimetallic CpFe(eta5:eta5-as-indacenediide)RhL2 complexes (L2 = COD (2), NBD (3), (ethylene)2 (4)) have been obtained from metalation of the mononuclear lithium CpFe-(eta5-as-indacenediide) with [Rh(mu-Cl)L2]2. Mixtures of syn and anti heterobimetallic complexes were formed and fully characterized by 2D NMR spectroscopy. The reactivity at the rhodium center is greatly influenced by the presence of the ferrocenyl moiety. The voltammetric behavior and the optical spectra are in favor of the existence of significant electronic interactions between the two metals.
2002
Istituto di Scienze e Tecnologie Molecolari - ISTM - Sede Milano
ORGANOMETALLICS
21
2679
2686
bimetallic complexes
NMR
electrochemistry
cooperative effect
metal-metal interact
New synthetic strategies for the achievement of the instrumental goals have been developed; in particular, we improved a synthetic pathway recently suggested by Chung et al. and consisting of the use of [CpFe(eta6-fluorene)]PF6 as an FeCp transfer reagent. Thus, the lithium salt of s- (or as-) hydroindacenide was reacted with CpFe(eta5-fluorenide) to obtain the complexes Cyclopentadienyliron(eta5-hydro-s-indacenide) (s-1) and Cyclopentadienyliron(eta5-hydro-as-indacenide) (as-1) in 55-65% yield (by NMR integration of the crude mixture). Purification by column chromatography on silica or alumina gave different results for the two complexes. In fact, we have been able to obtain pure as-1 (as a 2/3 mixture of the 1-hydro- and 3-hydro isomers) in good yield (ca. 58%) with little decomposition. On the contrary, s-1 was obtained pure in a very small amount owing to its high instability under the chromatographic conditions.
7
info:eu-repo/semantics/article
262
Santi, C; Ceccon, A; Carli, F; Crociani, L; Bisello, A; Tiso, M; Venzo, A
01 Contributo su Rivista::01.01 Articolo in rivista
none
01.01 Articolo in rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/70614
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact