in ethylene glycol compds. heated in ethylene glycol for 1 h at 180°C; filtered, washed with MeOH, H2O, acetone, dried in vac.;

in ethylene glycol dimethyl ether dehydrating a MnCl2*4H2O soln. by boiling for 1 h, addn. of phthalodinitrile, boiling for 1 h; pptn., filtration, washing with water and acetone, drying in vac. over KOH, elem. anal.;