trans-Tetra­aqua­bis{(E)-2-cyano-1-[(ethoxy­carbon­yl)methyl­sulfan­yl]-2-(1-naphthyl­amino­carbon­yl)ethene-1-thiol­ato}calcium(II) diethyl ether disolvate

Abstract

In the title compound, [Ca(C18H15N2O3S2)(H2O)4]·2C4H10O, the Ca atom, which lies on an inversion centre, is coordinated octa­hedrally by four water mol­ecules and two anions of the ketene dithio­acetal, the donor atoms of which are the amidic carbonyl O atoms. The central backbone of the ligands (excluding the naphthalene and oxoethyl groups) is essentially planar (r.m.s. deviation 0.035 Å). Intra­molecular hydrogen bonds are observed from the NH group to the formally ‘thiol­ate’ S atom and from one coordinated water to the nitrile group and to the ether O atom. Inter­molecular hydrogen bonds from the second independent water mol­ecule to the thiol­ate S atom and the side-chain oxo group connect the mol­ecules in chains parallel to the a axis