in neat (no solvent) mixed, allowed to stand at room temp. 24 h, the mixture solidified; recrystn. from hexane/CHCl3 (10:1), elem. anal.;

in ethanol byproducts: NaCl; mixing, refluxing for 1 h; cooled, solvent removed in vac., residue heated in hexane/CHCl3 (10:1), filtered, crystn. (on cooling);

in toluene byproducts: H2O; refluxing for 2 h, removing H2O with a water separator;