Synthesis and Structural Characterization of Palladium Dicarbene Complexes Bearing Labile Co-Ligands

Han Vinh Huynh; Hui Xian Seow

doi:10.1071/CH09143

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Synthesis and Structural Characterization of Palladium Dicarbene Complexes Bearing Labile Co-Ligands

Han Vinh Huynh ^A ^B and Hui Xian Seow ^A

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.

^B Corresponding author. Email: chmhhv@nus.edu.sg

Australian Journal of Chemistry 62(9) 983-987 https://doi.org/10.1071/CH09143
Submitted: 11 March 2009 Accepted: 8 April 2009 Published: 17 September 2009

Abstract

Dicarbene complexes [Pd(OAc)₂(diNHC)] (2), [Pd(O₂CCF₃)₂(diNHC)] (3), and [Pd(CNCH₃)₂(diNHC)](SO₃CF₃)₂ (4) bearing labile acetato, fluoroacetato, and acetonitrile co-ligands have been synthesized via metathesis reaction of the respective precursor [PdBr₂(diNHC)] (1) with Ag-salts. All complexes are stable towards air and moisture and have been fully characterized by spectroscopic and spectrometric methods. Notably and in comparison to diphosphine analogues, they resist ligand disproportionation in solution. Their molecular structures have also been determined by single crystal X-ray diffraction. A preliminary catalytic study showed low activity in the hydroamination reaction, but revealed an interesting co-ligand influence.

Acknowledgements

The authors thank the National University of Singapore for financial support (Grant no. R 143–000–327–133) and especially Ms Geok Kheng Tan and Professor Lip Lin Koh for determining the X-ray molecular structures.

References

Synthesis and Structural Characterization of Palladium Dicarbene Complexes Bearing Labile Co-Ligands

Abstract

Acknowledgements

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