sulfuric acid; sulfur trioxide; dihydrogen peroxide 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C;

1: 84.6 percent / copper powder / xylene / Heating; 1.) 2 h, 2.) 1 h 2: 85 percent / 1.) 96percent H2SO4, 2.) H2O / 1.) 70 deg C, 2.) 95 deg C, 1h 3: 1.) oleum (20percent SO3), 2.) sodium azide 4: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 5: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme

1: 99.2 percent / conc. H2SO4 / 1.) 4 h, reflux, 2.) 25 deg C, 12-15 h 2: 84.6 percent / copper powder / xylene / Heating; 1.) 2 h, 2.) 1 h 3: 85 percent / 1.) 96percent H2SO4, 2.) H2O / 1.) 70 deg C, 2.) 95 deg C, 1h 4: 1.) oleum (20percent SO3), 2.) sodium azide 5: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 6: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme

1: 89.6 percent / HNO3, fuming sulfuric acid (30percent SO3) / 1.) 25-30 deg C, 2.) 85 deg C, 3.) 95 deg C, 4.5 h 2: 99.2 percent / conc. H2SO4 / 1.) 4 h, reflux, 2.) 25 deg C, 12-15 h 3: 84.6 percent / copper powder / xylene / Heating; 1.) 2 h, 2.) 1 h 4: 85 percent / 1.) 96percent H2SO4, 2.) H2O / 1.) 70 deg C, 2.) 95 deg C, 1h 5: 1.) oleum (20percent SO3), 2.) sodium azide 6: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 7: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme

1: 85 percent / 1.) 96percent H2SO4, 2.) H2O / 1.) 70 deg C, 2.) 95 deg C, 1h 2: 1.) oleum (20percent SO3), 2.) sodium azide 3: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 4: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme

1: 1.) oleum (20percent SO3), 2.) sodium azide 2: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 3: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme

1: 23.4 percent / HNO3, H2SO4 / 1.) 30-35 deg C, 1.5 h, 2.) 65 deg C, 30 min, 3.) 70 deg C, 1.5 h 2: 38.6 percent / oleum (30percent SO3), H2O2 / 1.) 8-12 deg C, 1 h, 2.) 14 d, 25 deg C View Scheme