Crystal structure of the salt bis­(tri­ethano­lamine-κ(4) N,O,O′,O′′)cadmium bis[2-(2-oxo-2,3-di­hydro-1,3-benzo­thia­zol-3-yl)acetate]

The reaction of 2-(2-oxo-2,3-di­hydro-1,3-benzo­thia­zol-3-yl)acetic acid (NBTA) and tri­ethano­lamine (TEA) with Cd(CH(3)OO)(2) resulted in the formation of the title salt, [Cd(C(6)H(15)NO(3))(2)](C(9)H(6)NO(3)S)(2). In its crystal structure, the complex cation [Cd(TEA)(2)](2+) and two independent NBTA(−) units with essentially similar geometries and conformations are present. In the complex cation, each TEA mol­ecule behaves as an N,O,O′,O′′-tetra­dentate ligand, giving rise to an eight-coordinate Cd(II) ion with a bicapped trigonal–prismatic configuration. All ethanol groups of each TEA mol­ecule form three five-membered chelate rings around the Cd(II) ion. The Cd—O and Cd—N distances are in the ranges 2.392 (2)–2.478 (2) and 2.465 (2)–2.475 (3) Å, respectively. O—H⋯O hydrogen bonds between the TEA hy­droxy groups and carboxyl­ate O atoms connect cationic and anionic moieties into chains parallel to [110]. Each NBTA(−) anion is additionally linked to a symmetry-related anion through π–π stacking inter­actions between the benzene and thia­zoline rings [minimum centroid-to-centroid separation = 3.604 (2) Å]. Together with additional C—H⋯O inter­actions, these establish a double-layer polymeric network parallel to (001).