Isolation of a non-heteroatom-stabilized gold-carbene complex.
Angew Chem Int Ed Engl
; 53(35): 9372-5, 2014 Aug 25.
Article
en En
| MEDLINE
| ID: mdl-24953223
ABSTRACT
Gold-carbene complexes are essential intermediates in many gold-catalyzed organic-synthetic transformations. While gold-carbene complexes with direct, vinylogous, or phenylogous heteroatom substitution have been synthesized and characterized, the observation in the condensed phase of electronically non-stabilized gold-carbenes has so far remained elusive. The sterically extremely shielded, emerald-green complex [IPr**Au=CMes2](+)[NTf2](-) has now been synthesized, isolated, and fully characterized. Its absorption maximum at 642â
nm, in contrast to 528â
nm of the red-purple carbocation [Mes2CH](+), clearly demonstrates that gold is more than just a "soft proton".
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2014
Tipo del documento:
Article