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 layers via hydrogen bonds. These layers are connected via electrostatic attraction between iodide ions and positive trimethylazanium groups in the crystal.

Keywords

• crystal structure
• betaine
• trimethylammonioacetate
• sodium iodide