Equilibrium and kinetic study of nitric oxide binding to phthalocyaninatoiron(II) in dimethyl sulphoxide
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 369-371
- https://doi.org/10.1039/dt9870000369
Abstract
The equilibrium and kinetics of the reaction between nitric oxide and phthalocyaninatoiron(II), [Fe(pc)], in dimethyl sulphoxide (dmso) has been studied at 20 ± 0.5 °C. In the presence of a large excess of NO, [Fe(pc)] binds nitric oxide in a 1 : 1 mol ratio via pseudo-first-order kinetics. The observed rate constant has the general form kobs. =kf[NO], i.e. with and intercept close to zero and a slope kf=(2.2 ± 0.4)× 104 dm3 mol–1s–1. From the values of the equilibrium constant [K=(1.1 ± 0.1)× 106 dm3 mol–1] and second-order rate constant (kf) for the binding of NO, the dissociation rate constant (kr) has been estimated to be (2.0 ± 0.4)× 10–2s–1. The present results are discussed in the light of related previous investigations.This publication has 2 references indexed in Scilit:
- Nitric oxide ferrohemes: kinetics of formation and photodissociation quantum yieldsJournal of the American Chemical Society, 1983
- Equilibrium and kinetic study of the reaction between phthalocyaninatoiron(II) and carbon monoxide in dimethyl sulphoxideJ. Chem. Soc., Dalton Trans., 1981