Inorganic Chemistry, Vol.52, No.2, 1113-1121, 2013
2,2,2-Tris(pyrazolyl)ethoxide (Ep(OX)) Ruthenium(II) Complexes, (Ep(OX))RuCl(L)(L'): Synthesis, Structure, and Reactivity
Treatment of RuCl2(PPh3)(3) with sodium 2,2,2-tris(pyrazolyl)ethoxide [NaOCH2C(pz)(3); pz = pyrazolyl] affords the asymmetric heteroscorpionate complex cis-(Ep(OX))RuCl(PPh3)(2) (1), (Ep(OX) = kappa(3)-N,N,O-OCH2C(pz)(3)), which can be converted to Ru(II) compounds (2-6), (Ep(OX))RuCl(L)(L') [(2) L = PPh3, L' = P(OCH2)(3)CEt; (3) L = L' = P(OCH2)(3)CEt; (5) L, L' = PPh3, CO; (6) L = L' = CO]. Compounds 1 and 3 react with CHCl3, at 60 and 100 degrees C, respectively, to yield cationic tris(pyrazolyl)methane Ru(II) complexes, [(kappa(3)-N,N,N-Mp)RuCl(L)(2)]Cl [Mp = HC(pz)(3); (7) L = PPh3; (8) L = P(OCH2)(3)CEt]. The complexes have been characterized by H-1, C-13, and P-31{H-1} NMR spectroscopy, elemental analysis, high resolution mass spectrometry, and cyclic voltammetry. Complexes 1 and 3 have also been characterized by single crystal X-ray analysis.