There is a considerable knowledge of chemical equilibria of the stepwise formation of complexes in coordination chemistry. However, the coordination equilibria of complex formation of the type, M + R e MR s M2R e M3R e ... e M , R is less well understood. As their compositions are contrary t o the formation of stepwise complexes, they are called 'anti-stepwise complexes'. The existence of such complexes is not unusual and often causes difficulties in speciation analyses. Therefore, it is essential t o investigate further the chemical equilibria in solution. In this paper, based o n Bjerrum's function ( f i ) and the method of corresponding solutions, a method is suggested for determining the stability constants of this kind of complex. For demonstration purposes it has been used with the iron(ll1) and Eriochrome Cyanine R system and satisfactory results were obtained. This method is generally applicable and could be used for most 'anti-stepwise' systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.