IPr**^(4-Bp)-Highly Hindered, Ring Extended N-Heterocyclic Carbenes.

ABSTRACT: There is a strong demand for the development of sterically-hindered N-heterocyclic carbenes due to their potential to stabilize reactive organometallic species. IPr* (IPr* = 1,3-bis(2,6-bis(diphenylmethyl)-4-methylphenyl)imidazo-2-ylidene) is a highly-hindered and sterically-flexible ligands, which has found broad utilization in coordination chemistry. Herein, we report the synthesis, structural and electronic characterization of IPr**(4-Bp) - a class of novel, sterically-bulky and easily-accessible N-heterocyclic carbene ligands that bearing biphenyl wingtips. Coordination chemistry to Ag(I), Cu(I) and Pd(II) is presented. The biphenyl wingtip permits to extend the %V bur of IPr**(4-Bp) to 58.8%, linear geometry, which is the highest reported to date for imidazol-2-ylidene ligands. The sy

SUBMITTER: Sha Y 

PROVIDER: S-EPMC12360280 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature