Poly[[[diaquazinc(II)]-bis(μ₂-3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olato-κ²N³:N^3′)] dihydrate]

Abstract

The coordination of the 3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1H-pyrrol-2-olate anion to Zn(II), the apical sites of which are occupied by two water molecules, results in the formation of two-dimensional layers of the title coordination polymer, {[Zn(C8HN4O2)2(H2O)2].2H2O}n, in which the Zn(II) cations lie on inversion centres in space group C2/c, with water ligands in the apical sites of octahedral geometry. Hydrogen bonds between coordinated and lattice water molecules, and pi-pi stacking interactions between the anions link adjacent layers into a continuous framework.

Disorder for the Sake of Order

“…Our previous research showed that salts based on new organic anion HA – (Figure ) are a convenient model to investigate and develop new approaches toward engineering certain crystal structures with desired properties. − Mainly our research was dedicated to influence such factors as π–π interactions, hydrogen bonds, and coordination bonds on solid-state luminescence of HA – -based salts. In this article we present insight into the nature of the disorder factor and its influence on luminescent properties of organic salt built from N,N -dimethylanilinium cation (DMA + ) and 3-cyano-4-dicyanomethylene-5-oxo-4,5-dihydro-1 H -pyrrole-2-olate anion (HA – ).…”