Coordination chemistry of a modular N,C-chelating oxazole-carbene ligand and its applications in hydrosilylation catalysis

• Verfasst von: Poyatos, Macarena [VerfasserIn]
• Verfasst von: Maisse-François, Aline [VerfasserIn]
• Verfasst von: Bellemin-Laponnaz, Stéphane [VerfasserIn]
• Verfasst von: Gade, Lutz H. [VerfasserIn]
• Titel: Coordination chemistry of a modular N,C-chelating oxazole-carbene ligand and its applications in hydrosilylation catalysis
• Titelzusatz: dedicated to Professor Hansgeorg Schnöckel on the occasion of his 65th birthday
• Gefeierte Person: Schöckel, Hansgeorg [GefeierteR]
• Verf.angabe: Macarena Poyatos, Aline Maisse-François, Stéphane Bellemin-Laponnaz, and Lutz H. Gade
• Jahr: 2006
• Umfang: 8 S.
• Fussnoten: Published online 4 April 2006 ; Gesehen am 13.12.2022
• Titel Quelle: Enthalten in: Organometallics
• Ort Quelle: Washington, DC : ACS Publ., 1982
• Jahr Quelle: 2006
• Band/Heft Quelle: 25(2006), 10, Seite 2634-2641
• ISSN Quelle: 1520-6041
• DOI: doi:10.1021/om060166u
• Datenträger: Online-Ressource
• Dokumenttyp: Festschrift
• Sprache: eng
• K10plus-PPN: 1826901094

Abstract

Reaction of 1-mesitylimidazole with 2-chlorobenzoxazole gave the 2-benzoxazolyl imidazolium salt bzoxcarbH+Cl- (1), which was converted to the silver N-heterocyclic carbene complex [AgI(bzoxcarb)Cl] (2) by reaction with Ag2O in dichloromethane. The crystal structure analysis confirmed the monomeric nature of complex 2. The silver complex 2 was reacted with [PdCl2(COD)] to yield the corresponding palladium complex [PdCl2(bzoxcarb)] (3), for which an X-ray diffraction study established a distorted square planar configuration with the imidazolyl and the oxazolyl ring lying within the molecular plane. Upon direct reaction of the imidazolium salt 1 with Pd(OAc)2/NaI, a bis-carbene palladium complex [PdI2(bzoxcarb)2] (4) was obtained. The rhodium complex [RhCl(bzoxcarb)(CO)] (5) was prepared in high yield in a one-step reaction of 1 with [Rh(acac)(CO)2] (acac = acetylacetonate). The silver N-heterocyclic carbene complex 2 was also used as carbene transfer reagent in the synthesis of the platinum complex [PtCl2(bzoxcarb)] (6), which was found to be an active catalyst for the hydrosilylation of alkenes and alkynes.