Intramolecular exchange between square antiprismatic enantiomers of the pendant arm macrocyclic ligand complex N,N′,n″,n‴-tetrakis(2-hydroxyethyl)-1,4,7,10-tetraazacyclododecanelead(II)

Abstract

Variable temperature ¹³C NMR studies of the pendant arm macrocyclic complex N,N′,N″,N‴-tetrakis(2-hydroxyethyl)-1,4,7,10-tetraazacyclododecanelead(II) and its cadmium(II) and mercury(II) analogues in [²H₄]-methanol indicate that these complexes undergo rapid intramolecular exchange between two square antiprismatic enantiomers.