Study of reactivity of p-cymene ruthenium(II) dimer towards diphenyl-2-pyridylphosphine: Synthesis, characterization and molecular structures of [(η6-p-cymene)RuCl2(PPh2Py)] and [(η6-p-cymene)RuCl(PPh2Py)]BF4

Abstract

The reaction of [{(η6-p-cymene)Ru(μ-Cl)} 2Cl2] with functionalized phosphine viz, diphenyl-2-pyridylphosphine yielded complexes of the type: (a) P-bonded complex [(η6-p-cymene)RuCl2(PPh2Py)] (1), (b) P-, N-chelated complex [(η6p-cymene)RuCl-(PPh2Py)]BF 4 (2) and [RuCl2(PPh2Py)2] (3) resulting from the displacement of the p-cymene ligand. These complexes were characterized by 1H NMR, 31P NMR and analytical data. The structures of complexes 1 and 2 have been confirmed by single crystal X-ray diffraction study. Complex 1 crystallised in triclinic space group P 1̄ with a = 10.9403 (3) Å, b = 13.3108 (3) Å, c = 10.5394 (10) Å, α = 88.943 (2)°, β = 117-193 (2)°, γ = 113.1680 (10)°, Z = 2 and V = 1230.39 (5) Å3. The complex 2 crystallises in monoclinic space group P21 with a = 9.1738 (4) Å, b = 14.0650 (6) Å, c = 10.7453 (5) Å, β = 106.809 (1)°, Z = 2 and V = 1327.22 (10) Å3.