Properties of (1,4,7,10,13-pentaazacyclohexadecane)nickel(III) in aqueous solutions: a pulse radiolytic study

The oxidn. of (1,4,7,10,13-pentaazacyclohexadecane)nickel(II) by OH• in aq. solns. was studied, and the properties of the resulting Ni(III) complex were compared with those of [NiL]3+ (L = tetraazacyclotetradecane). The difference in the properties is attributed to the 5th N donor atom which decreases the activity of the central tervalent Ni.