- 作者: 陳竹亭
- 作者服務機構: 台灣大學化學系
- 中文摘要: The .alpha.-ketoacyl complexes constitute a new family of organometallic compounds. The .alpha.-ketoacyl ligands have a strong influence and generally follow a decreasing order of acyl>.alpha.-ketoacyl>alkyl or aryl. The oxalyl conformation exhibits planar s-cis, perpendicular and planar s-trans structures. In comparison with the standard C(sp/sup 2/)-C(sp/sup 2/) bond, the oxalyl C-C bonds of the .alpha.-ketoacyl ligands are relatively long, indicating that the electronic delocalization between the oxalyl carbonyls are of the least importance. The weak C-C bond between the.alpha.-ketoacyl carbonyls affords a driving force of the decarbonylative reactivity of such ligands; it is also responsible for the difficulty of formation of the.alpha. -ketoacyl complex via insertion of CO into the metal-acyl bond. However, .alpha.-ketoacyl complexes can be kinetically stable. Kinetic studies of decarbonylation of the .alpha.-ketoacyl complexes provided a profound understanding of the mechanism of novel catalytic reactions of double carbonylation. The .alpha.-ketoacyl complexes show promise to explore rare acyl migration and the reductive coupling of C(sp/sup 2/)-C(sp/sup 2/) bonds in a fundamental way.
- 英文摘要: --
- 中文關鍵字: .Alpha.-Ketoacyl; Carbonylation; Decarbonylation; Double Carbonylation; Acyl Migration; Acyl-Acyl Coupling
- 英文關鍵字: .alpha.-酮醯基;羰化;去羰化;雙羰化;醯基轉移;醯基-醯基耦合