in further solvent(s) SnCl2 and phthalonitrile were added to 1-chloronaphthalene (solvent); brought to reflux over a period of 1 h; was allowed to reflux for 3 h; cooled slowly to room temperature; filtered; washed in benzene in a Soxhlet extractor for 24 h; elem. anal.;

in tetrahydrofuran byproducts: (phthalocyaninato)magnesium; heating in THF to reflux;