Carbatricobalt decacarbonyl cation. Novel acylating agent

Bioorganometallic Chemistry - Transition Metal Complexes withα-Amino Acids and Peptides

“…[76] Following any subsequent trans- (110). [79] Analogous carbamoyl complexes are formed by the reaction of [(Ph 3 P) 2 MCl 2 ] (M Pd, Pt) with CO in the presence of a-amino acid esters (111,112) [80] and by the reaction of [CpFe(CO) 3 ]CF 3 SO 3 with a-amino acid esters (113). [8a] a-Amino acid esters can also be added to coordinated olefins.…”

A Trigold(I) Ketenylidene Cation

“…Transition-metal ketenides and ketenylidenes have been studied as models for plausible intermediates in carbon monoxide chemistry . The first well-defined transition-metal ketenylidene complex was the highly electrophilic [Co 3 (CO) 9 (CCO)] + , described by Seyferth et al − Shriver and co-workers studied a series of generally nucleophilic, anionic ketenylidenes, − including one featuring a mixed-metal [Fe 3 Cu] core . Several of these complexes display remarkable C–C coupling and cleavage reactions .…”

Bioconjugates of Enantiomerically Pure Organopalladium Compounds by Metal‐Assisted Positional Selective Transesterifications at Palladium Enolates

“…Evidence for the possibility of the second reaction pathway occurring is provided by a related work by Seyferth et al [19] on the stepwise transesterification of carboxymeth-A C H T U N G T R E N N U N G ylidynetricobalt nonacarbonyl and the structural assignment of a cationic ketene complex as an intermediate of this reaction by McGlinchey et al [20] According to the literature, [21] the formation of acylium ions and intermediates such as 13 is favored by sterically demanding environments, as represented by the ester-groups in rac-4. Under these circumstances, the dissociation of methanol should be preferred, due to higher stability of the formed ketene intermediate.…”