Crystal structures of binary compounds of meldonium 3-(1,1,1-trimethylhydrazin-1-ium-2-yl)propanoate with sodium bromide and sodium iodide

3-(1,1,1-Trimethylhydrazin-1-ium-2-yl)propanoate (C6H14N2O2, M, more commonly known under its commercial names Meldonium or Mildronate) co-crystalizes with sodium bromide and sodium iodide forming polymeric hydrates poly[[tetra-mu-aqua-diaquabis[3-(1,1,1-trimethylhydrazin-1-ium-2-yl)propanoate]disodium]dibromide tetrahydrate], [Na-2(C6H14N2O2)(2)(H2O)(6)]Br-2 center dot 4H(2)O, and poly[[di-mu-aqua-diaqua[mu-3-(1,1,1-trimethylhydrazin-1-ium-2-yl)propanoate]disodium]diiodide], [Na-2(C6H14N2O2)(2)(H2O)(4)]I-2. The coordination numbers of the sodium ions are 6; the coordination polyhedra can be described as distorted octahedra. Metal ions and M zwitterions are assembled into infinite layers via electrostatic interactions and hydrogen-bonded networks. These layers are connected via electrostatic attraction between halogenide ions and positive trimethylhydrazinium groups into a three-dimensional structure.