An Unusually Static, Sterically Hindered Silver Bis(N-heterocyclic carbene) Complex and Its Use in Transmetalation

• Published in: Organometallics Vol. 23; no. 25; pp. 5881 - 5884
• Main Authors: Wanniarachchi, Yoshitha A, Khan, Masood A, Slaughter, LeGrande M
• Format: Journal Article
• Language: English
• Published: American Chemical Society 06.12.2004
• ISSN: 0276-7333; 1520-6041
• DOI: 10.1021/om0493098

A dimeric silver complex of the bulky bis(N-heterocyclic carbene) ligand 1,1‘-dimesityl-3,3‘-methylenediimidazol-2,2‘-diylidene exhibits a surprisingly static structure in solution, due to a favorable chelate ring conformation, yet serves as a convenient transmetalation reagent for the formation of a new κ2-bis(NHC) rhodium(I) complex. The latter complex demonstrates a strong influence of N-substituent steric bulk on the bis(NHC) binding mode.