sodium chloride in water 15 equiv. HClO4 plus 2 equiv. NaCl or 2 equiv. HCl plus 13 equiv. NaCl, heating (water-bath, 1 h); washing of pptd. trans-complex (cold water, alcohol, ether), drying (105°C);

hydrogenchloride in water 2 equiv. HCl, heating (water-bath, 1 h); washing of pptd. chelate-complex (cold water, alcohol, ether), drying (105°C);

perchloric acid; water in water heating glycine complex with 2-15 equiv. HClO4 (water-bath, 1 h), filtration off of cis-chelate, addn. of thiourea to filtrate; washing of cis-chelate (cold water, alcohol, ether), drying (105°C); yield decreasing with increasing acidity;

water in water heating glycine complex with 2-15 equiv. HNO3 or H2SO4 (water-bath, 1 h); washing of pptd. cis-chelate (cold water, alcohol, ether), drying (105°C);

sodium chloride in water 15 equiv. HClO4 plus 2 equiv. NaCl or 2 equiv. HCl plus 13 equiv. NaCl, heating (water-bath, 1 h); washing of pptd. trans-complex (cold water, alcohol, ether), drying (105°C);