Cationic tris(pyrazolyl)borate bipyrimidine complexes |
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| Authors: | David J. Harding Phimphaka Harding Jutaporn Kivnang Harry Adams |
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| Affiliation: | (1) Molecular Technology Research Unit, Department of Chemistry, Walailak University, Thasala, Nakhon Si Thammarat, 80161, Thailand;(2) Inorganic Materials Research Unit, Department of Chemistry, Taksin University, Songkhla, 90000, Thailand;(3) Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, S3 7HF, UK |
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| Abstract: | The cationic complexes, [TpRNi(bpym)]+ {TpR = tris(3,5-diphenylpyrazolyl)borate, R = Ph2 1; tris(3-phenyl-5-methylpyrazolyl)borate, R = Ph,Me 2} were synthesized by reacting [TpRNiBr] (R = Ph2; Ph,Me) with bipyrimidine followed by subsequent addition of KPF6 in CH2Cl2. The green solids have been characterized by IR, UV–Vis and 1H NMR spectroscopy. Crystallographic studies of [TpPh,MeNi(bpym)]PF6 reveal a five-coordinate square pyramidal nickel centre with a κ3-coordinated TpPh,Me ligand and a chelating bipyrimidine ligand. Cyclic voltammetric studies show irreversible reduction with the degree of reversibility dependent on the type of TpR ligand. |
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