1: 84 percent / activated iron, hydrogen chloride / benzene 2: 1.) natrium nitrite, concentrated sulfuric acid; 2.) potassium iodide View Scheme

1: 1.) sodium nitrite, concentrated sulfuric acid; 2.) potassium iodide / 1.) water, 0-5 deg C, 2.5 h; 2.) water 2: 41 percent / copper powder / Heating 3: 84 percent / activated iron, hydrogen chloride / benzene 4: 1.) natrium nitrite, concentrated sulfuric acid; 2.) potassium iodide View Scheme

1: 41 percent / copper powder / Heating 2: 84 percent / activated iron, hydrogen chloride / benzene 3: 1.) natrium nitrite, concentrated sulfuric acid; 2.) potassium iodide View Scheme

2: 1.) sodium nitrite, concentrated sulfuric acid; 2.) potassium iodide / 1.) water, 0-5 deg C, 2.5 h; 2.) water 3: 41 percent / copper powder / Heating 4: 84 percent / activated iron, hydrogen chloride / benzene 5: 1.) natrium nitrite, concentrated sulfuric acid; 2.) potassium iodide View Scheme

sulfuric acid; potassium iodide; sodium nitrite Yield given. Multistep reaction;