Determination of N-heterocyclic carbene (NHC) steric and electronic parameters using the [(NHC)Ir(CO)2Cl] system

Roy A. Kelly, Hervé Clavier, Simona Giudice, Natalie M. Scott, Edwin D. Stevens, Jon Bordner, Ivan Samardjiev, Carl D. Hoff, Luigi Cavallo, Steven P. Nolan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

509 Scopus citations


Complexes of iridium bearing NHC (NHC = N-heterocyclic carbene) ligands were synthesized and fully characterized. The series [(NHQIr(cod)Cl] were obtained by simple cleavage of [Ir(cod)Cl]2. The [(NHC)Ir(COd)Cl] complexes were reacted with excess carbon monoxide, leading to [(NHC)Ir(CO) 2Cl]. The infrared carbonyl stretching frequencies of these were recorded to quantify the electronic parameter of NHC ligands. X-ray diffraction study results allow for determination of NHC steric parameters within this series. These data allow for comparison with orner ligand families.

Original languageEnglish (US)
Pages (from-to)202-210
Number of pages9
Issue number2
StatePublished - Jan 28 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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