Equilibria and kinetics of dissociation of triphenylphosphine from [N,N′-ethylenebis(salicylideneiminato)]bis(triphenylphosphine)ruthenium(II) in benzene

Abstract

The reactions (i) and (ii)[H₂salen =N,N′-ethylenebis(salicylideneimine)] in benzene solution have been studied by both equilibrium and kinetic spectrophotometric methods. At 25 °C, k₁= 1.61 ± 0.02 [Ru(salen)]+ PPh₃ [graphic omitted] [Ru(salen)(PPh₃)](i), [Ru(salen)(PPh₃)]+ PPh₃ [graphic omitted] [Ru(salen)(PPh₃)₂](ii) dm³mol^–1s^–1, k_–1=(2.7 ± 0.4)× 10^–4s^–1, k₂=(1.18 ± 0.05)× 10^–1dm³mol^–1s^–1, k_–2=(1.20 ± 0.09)× 10^–3s^–1, K₁=(0.60 ± 0.08)× 10⁴ dm³ mol^–1, and K₂= 98 ± 6 dm³ mol^–1.