RT info:eu-repo/semantics/article
T1 Transmetalation of Acyclic Tungsten Carbenes to Coinage Metals: Distinct Behavior of Silver toward Carbene Transfer and Hydrolysis
A1 Toledo Pérez, Alberto
A1 Salamanca Verdugo, Vanesa
A1 Pérez Moro, Teresa
A1 Albéniz Jiménez, Ana Carmen
K1 Química
K1 Carbene
K1 Gold
K1 Copper
K1 Silver
K1 Transmetalation
K1 Hydrolysis
K1 2303 Química Inorgánica
AB The transmetalation of acyclic monoamino and alkoxo carbenes from tungsten to group 11 metals has been studied for all three metals by analyzing the new metal carbenes formed and also their decomposition products in solution. The ease of transmetalation follows the trend: Au > Cu > Ag and thegold carbenes can be isolated, a copper carbene could be detected but we found no experi-mental evidence of the formation of any silver carbene. The electrophilic character of copper and gold carbenes is supported by the identity of the products formed upon hydrolysis of the carbenes involved. Silver shows a distinct behavior and the presence of Ag+ ions in an ace- tonitrile solution of a tungsten aminocarbene leads to the formal protonation of the carbene fragment to give an iminium salt. This outcome, a seemingly nucleophillic behavior, is unexpected for group 11 carbenes but DFT calculations show that tive cationic silver carbene is energetically accessible.
SN 0276-7333
YR 2021
FD 2021
LK http://uvadoc.uva.es/handle/10324/46099
UL http://uvadoc.uva.es/handle/10324/46099
LA eng
NO Organometallics 2021, 40, 38-47
NO Producción Científica
DS UVaDOC
RD 23-nov-2024