THE COMPETITION FOR RUTHENIUM(II) BETWEEN PHOSPHORUS(III) AND NITROGEN(III) BINDING SITES IN 2-CYANOETHYLDIPHENYLPHOSPHINE

摘要

FTIR, P-31 NMR and Ru-III/Ru(II)E degrees' (+0.20+/-0.10 V vs ECS) data strongly suggest that the ligand 2-cyanoethyldiphenylphosphine (2-CEDP) is bound to Ru-II by the cyano group, while the P-III site remains uncoordinated. The stability of [Ru(NH3)(5) (2-CEDP)](2+) in aqueous medium has been studied and the binuclear complex ion [Ru(NH3)(5) 2-CEDP)Ru(NH3)(5)](2+) was formed by reacting [Ru(NH3)(5)(H2O)](2+) with the [Ru(NH3)(5) (2-CEDP)](2+) species, k(1) = 1.7 x 10(-1) M(-1) s(-1) (mu = 0.10 M, NaCF3COO/CF3COOH; C-H+ = 1.0 X 10(-3) M, CF3COOH). [References: 24]