catena-Poly[[nickel(II)-μ3-1,1-dicyanoethene-2,2-dithiolato-κ4S,S′:N:N′-bis[(15-crown-5)magnesium(II)]-μ3-1,1-dicyanoethene-2,2-dithiolato-κ4N:N′:S,S′] dichloride]

Abstract

The reaction of MgCl2, NiCl2, and Na-2(i-mnt) (i-mnt is 1,1-dicyanothene- 2,2-dithiolate) with 15-crown-5 (15-C-5) leads to an infinite chain polymer, {[NiMg2(C4N2S2)(2)(C10H20O5)(2)]Cl-2} (n) or {[Mg(15-C-5)](2)[Ni(i-mnt)(2)]Cl-2}(n), which consists of two [Mg(15-C-5)](2+) complex cations, one [Ni(i-mnt)(2)](2-) complex anion and two Cl- ions per formula unit. In the [Ni(i-mnt)(2)](2-) complex anion, Ni 2+ is located on a crystallographic mirror plane with a slightly distorted square-planar coordination by four S atoms. In the [Mg(15-C-5)](2+) complex cations, the Mg and one O atom of the crown lie on mirror planes and the Mg atoms are in sevenfold coordination environments of five O atoms from the crown and two N atoms from two i-mnt anions. The bridging of the two complexes via the Mg-N bonds leads to the formation of one-dimensional chains along the a axis.