Dichloridobis(2-{1-[2-(1H-indol-3-yl)ethyl­iminio]eth­yl}phenolate-κO)zinc(II)–2-{1-[2-(1H-indol-3-yl)ethyl­iminio]eth­yl}phenolate (1/2)

In the mononuclear complex mol­ecule of the title compond, [ZnCl(2)(C(18)H(18)N(2)O)(2)]·2C(18)H(18)N(2)O, the Zn atom, which lies on a twofold rotation axis, is coordinated by phenolate O atoms in a tetra­hedral coordination geometry. The coordinated Schiff base uses its indole NH donor site to form a hydrogen bond to the negatively charged phenolate O atom of the uncoordinated zwitterionic Schiff base. There is an intra­molecular N—H⋯O hydrogen bond in the coordinated and uncoordinated Schiff bases. The indole NH site of the uncoordinated Schiff base does not engage in a hydrogen-bond inter­action. The CH(2)—CH(2) group in the uncoordinated Schiff base is disordered equally over two positions.