A new series of quinquedentate macrocycles exhibiting systematic donor-atom variation: equilibrium and X-ray structural data for their interaction with copper(II)

Abstract

A series of nine seventeen-membered macrocyclic ligands in which the donor atom set varies systematically is reported; each ligand reacts with Cu^II to yield a 1:1 complex, the stability of which is markedly dependent on the donor atom pattern; the X-ray structure of the Cu^II complex of the N₄S donor confirms that all its donor atoms co-ordinate in the solid state; the structure of this metal-free macrocycle is also reported.