Synthesis and characterisation of new pyrazole-phosphinite ligands and their ruthenium(II) arene complexes |
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| Authors: | Rosa Tribó Josefina Pons Ángel Álvarez-Larena Josep Ros |
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| Institution: | a Departament de Química, Universitat Autònoma de Barcelona, 08193-Cerdanyola del Valles, Barcelona, Spain
b Departament de Geologia, Unitat de Cristal·lografía, Universitat Autònoma de Barcelona, 08193-Cerdanyola del Vallès, Barcelona, Spain |
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| Abstract: | The new potentially bidentate pyrazole-phosphinite ligands (3,5-dimethyl-1H-pyrazol-1-yl)methyl diphenylphosphinite] (L1) and 2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl diphenylphosphinite] (L2) were synthesised and characterised. The reaction of L1 and L2 with the dimeric complexes Ru(η6-arene)Cl2]2 (arene = p-cymene, benzene) led to the formation of neutral complexes Ru(η6-arene)Cl2(L)] (L = L1, L2) where the pyrazole-phosphinite ligand is κ1-P coordinated to the metal. The subsequent reaction of these complexes with NaBPh4 or NaBF4 produced the Ru(η6-p-cymene)Cl(L2)]BPh4] and Ru(η6-benzene)Cl(L2)]BF4] compounds which contain the pyrazole-phosphinite ligand κ2-P,N bonded to ruthenium. All the complexes were fully characterised by analytical and spectroscopic methods. The structure of the complex Ru(η6-p-cymene)Cl(L2)]BPh4] was also determined by a X-ray single crystal diffraction study. |
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| Keywords: | Pyrazole Phosphinite Arene ruthenium(II) complexes X-ray structure |
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