Betaine (trimethylammonioacetate) binary compound with sodium iodide

Abstract

In the title compound,catena-poly[[[bis[2-(trimethylazaniumyl)acetato-κO]sodium]-di-μ-aqua-[diaquasodium]-di-μ-aqua] diiodide], {[Na2(C5H11NO2)2(H2O)6]I2}n, both Na+ions have distorted octahedral environments (coordination number 6). The coordination polyhedra of the sodium ions are connected by common edges forming an infinite chain of ions along [100]. The chains and betaine zwitterions are assembled into infinitive layersviahydrogen bonds. These layers are connectedviaelectrostatic attraction between iodide ions and positive trimethylazanium groups in the crystal.