Sodium 2-nitro­cinnamate dihydrate: a one-dimensional hydrogen-bonded coordination polymer

Abstract

The title compound catena-poly[aqua­sodium-μ ₂-aqua-μ ₃-2-nitro­cinnamato], [Na(C ₉H ₆NO ₄)(H ₂O) ₂] _n , the sodium salt of trans-2-nitro­cinnamic acid, is a one-dimensional coordination polymer based on six-coordinate octa­hedral NaO ₆ centres, comprising three facially related monodentate carboxyl­ate O-atom donors from separate ligands (all bridging) [Na—O = 2.4370 (13)–2.5046 (13) Å], and three water mol­ecules (two bridging and one monodentate) [Na—O = 2.3782 (13)–2.4404 (17) Å]. The structure is also stabilized by intra-chain water–carboxyl­ate and water–nitro O—H⋯O hydrogen bonds.