Synthesis and characterization of Cu(I) and Cu(II) complexes containing ketiminate ligands

Shih Hsien Hsu, Chen Yi Li, Yi Wen Chiu, Mei Chun Chiu, Yu Ling Lien, Pei Cheng Kuo, Hon Man Lee, Jui Hsien Huang, Cheu Pyeng Cheng

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


A series of Cu(I) and Cu(II) complexes containing substituted ketiminate ligands was synthesized. Reaction of CuCl2 with 2 equiv. of Li[OC(Me)CHC(Me)N(Ar)] in toluene generated dark green solid of Cu[OC(Me)CHC(Me)N(Ar)]2 (1). Similarly, Cu(I) complex, {Cu[OC(Me)CHC(Me)N(Ar)]Li[OC(Me)CHC(Me)N(Ar)]}2 (2) was synthesized by reacting 2 equiv. of Li[OC(Me)CHC(Me)N(Ar)] with CuCl in toluene at room temperature for 12 h. While the reaction of CuCl with Li[OC(Me)CHC(Me)N(Ar)] in the presence of triphenylphosphine in THF solution at room temperature, a three-coordinated Cu[OC(Me)CHC(Me)N(Ar)](PPh3) (3) can be isolated in high yield. Replacing the PPh3 of 3 with N-heterocarbene (NHC) generates Cu[OC(Me)CHC(Me)N(Ar)](NHC) (4) in low yield. Complexes 2, 3, and 4 were characterized by 1H and 13C NMR spectroscopies and all molecules were structurally characterized by X-ray diffractometry. Two coordination modes of ketiminate ligands were found in the molecular structure of 2, one of which is copper-coordinated terminal ketiminates and the other is lithium-copper-coordinated bridging ketiminates.

Original languageEnglish (US)
Pages (from-to)5421-5428
Number of pages8
JournalJournal of Organometallic Chemistry
Issue number24
StatePublished - Nov 15 2007

Bibliographical note

Funding Information:
We thank the National Science Council of Taiwan for financial support and the National Changhua University of Education for supporting the NMR and X-ray spectrometers.


  • Copper
  • Ketiminate
  • NHC carbene


Dive into the research topics of 'Synthesis and characterization of Cu(I) and Cu(II) complexes containing ketiminate ligands'. Together they form a unique fingerprint.

Cite this