sodium acetate in ethanol formation in the alc. solution of the ligand and hot, Na-acetate containing Co(NO3)2-solution; pptn. in 1-2 days;; recrystallisation in acetone;;

sodium acetate in ethanol heating of the alc. solution of the methene with Na-acetate-containing CoCl2-solution; pptn. with H2O after approx. 1/2 h;; recrystallisation in a CHCl3-mixture and ethanol;;

in ethanol heating of the alc. solution of the methene with concd. aq. Co-acetate-solution; pptn. with H2O after approx. 1/2 h;; recrystallisation in a CHCl3-mixture and ethanol;;

in ethanol heating of the alc. solution of the methene with concd. aq. Co-acetate-solution; pptn. with H2O after approx. 1/2 h;; recrystallisation in a CHCl3-mixture and ethanol;;