A supramolecular assembly and complexes of zinc 2-hydoxy-3-naphthoate

Synthesis and characterisation of a cyclic binuclear five-coordinated complex [Zn(HA)(2)(22'bpy)](2) (HA = 2-hydroxy-3-naphthoate; 22'bpy = 22'-bipyridine) and a supramolecular assembly of two neutral zinc complexes namely [Zn(HA)(2)(phen)]center dot[Zn(HA)(2)(phen)(H2O)]center dot H2O (phen = 1,10-phenanthroline) are presented. Unsymmetrical cleavage of a cyclic dinuclear zinc intermediate complex is proposed as a plausible intermediate to form the supramolecular assembly. A four-coordinated helical zinc coordination polymer with a composition [Zn(HA)(2)(pep)](n) which is derived from 4-(2-(pyridine-4-yl)propyl) pyridine (pep) as connecting ligands between zinc ions is presented.