Crystal structure of bis[<i>N</i>-(2-hydroxyethyl)-<i>N</i>-methyldithiocarbamato-κ<sup>2</sup> <i>S</i>,<i>S</i>′](pyridine)zinc(II) pyridine monosolvate and its <i>N</i>-ethyl analogue
Acta crystallographica. Section E, Crystallographic communications