Superoxide Complex Research Articles

Detection of paramagnetic intermediates in the reaction of aqueous titanium(III) complexes with dioxygen

At pH 7–9, the e.s.r. signal observed during reaction of aqueous titanium(III) tartrate complex with dioxygen is a singlet, g= 2·0134, assigned as the superoxide complex.

σ-Bonded dioxygen. X-Ray crystal structure of [NEt4]3[Co(CN)5(O2)],5H2O

The crystal and molecular structure of a dioxygen adduct of [Co(CN)5]3– has been determined, the complex is best formulated as a nearly linear superoxide complex of CoIII with a Co–O–O angle of 175°.

Matrix isolation studies on reactions of metal atoms. The characterisation of Cu(O2)2 and Cr(O2)2

When copper or chromium vapour is condensed in low temperature matrices containing a few mole % oxygen, several new i.-r. bands may be observed. This paper shows, through the use of 18O substitution, that one species common to both systems is the bis-superoxide molecule M(O2)2; the structure of this species is discussed in the light of other metal superoxide complexes.

An electron spin resonance study of the interaction of sulphur dioxide with tetraphenylporphyrincobalt(II)

Sulphur dioxide interacts reversibly with tetraphenylporphyrincobalt(II) to form an adduct in which SO2 functions as a donor, while oxygen forms a superoxide complex.