The formation of dinuclear trichloro-bridged and mononuclear ruthenium complexes from the reactions of dichlorotris(p-tolylphosphine)ruthenium(II) with diazabutadiene ligands

  • Meng Guan TayEmail author
  • Ying Ying Chia
  • Suzie Hui Chin Kuan
  • Tze Pei Phan


Ru(II) complexes with diazabutadiene (R-DAB) ligands have been prepared. The reaction of RuCl3·nH2O with P(p-tolyl)3 gave a [RuCl2{P(p-tolyl)3}] precursor, whose reactions with R-DAB in toluene gave dinuclear trichloro-bridged Ru(II) complexes [Ru2Cl3(P(p-tolyl)3)2(R-DAB)2](BF4) which have been characterized by spectroscopic methods. In addition, one of the complexes was characterized using X-ray crystallography. Meanwhile, two mononuclear Ru(II) complexes [RuCl2(P(p-tolyl)3)2(R-DAB)] were obtained from the reactions of the [RuCl2{P(p-tolyl)3}] precursor with R-DAB ligands in THF. The two trans-mononuclear complexes were characterized by X-ray crystallography and solid-state 31P NMR. A temperature-dependent 31P NMR study was carried out to monitor the formation of dinuclear and mononuclear complexes.



The authors are thankful to Professor Todd B. Marder for providing us the facilities in his research laboratory. We would like to thank Dr. Martin Hähnel and Dr. Daniel Sieh for their opinion on the synthetic methods as well as sharing their knowledge on complexation. In addition to that, we are grateful to Dr. Rüdiger Bertermann for his help with the solid-state NMR analysis and Dr. Alexandra Friedrich for her help with the X-ray crystallography analysis. We would also like to thank Malaysian Ministry of Education for the financial support to the research through Exploratory Research Grant Scheme [ERGS/STG01(01)/1021/2013(01)].

Supplementary material

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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Faculty of Resource Science and TechnologyUniversiti Malaysia SarawakKota SamarahanMalaysia

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