iron; ammonium chloride in ethanol; water 20 h; Heating;

1: 99percentHNO3+H2SO4 / 3 h / 40 - 45 °C 2: 67 percent / NH4Cl,Fe / ethanol; H2O / 20 h / Heating View Scheme

1: 80 percent / Br2, Fe / 4.5 h / 110 °C 2: 99percentHNO3+H2SO4 / 3 h / 40 - 45 °C 3: 67 percent / NH4Cl,Fe / ethanol; H2O / 20 h / Heating View Scheme

1: NaNO2, H2SO4, CuCl, KCN, Na2CO3 / 1)H2SO4,NaNO2,CH3COOH 10 deg C, 30 min 2) KCN,Na2CO3 in water 2h,20 deg C 3)3h,85 deg C 2: H2SO4 / acetic acid; H2O / 16 h / Heating View Scheme