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

Tay, Meng Guan and Chia, Ying Ying and Hui, Suzie Chin Kuan and Pan, Tze Pei (2019) The formation of dinuclear trichloro‑bridged and mononuclear ruthenium complexes from the reactions of dichlorotris(p‑tolylphosphine)ruthenium(II) with diazabutadiene ligands. Transition Metal Chemistry, 44 (3). pp. 293-301. ISSN 1572-901X

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Abstract

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.

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