Redox Properties of Macrotricyclic Hexaamine Cobalt(III) Complexes

Abstract

Electrochemical properties of the macrocyclic hexaamine cobalt(III) complex [Co( taetacn )]³⁺ and its macrotricyclic derivatives [Co( azasartacn )]³⁺, [Co( nosartacn )]³⁺, [Co( amsartacn )]³⁺, and [Co( amsartacnH )]⁴⁺ in water, acetonitrile and acetone are reported and compared with those of macrobicyclic analogues. The results show that the tricyclic cage complexes are reduced somewhat more readily than their bicyclic equivalents, implying that the cavity sizes for the tricyclic systems are somewhat larger.