hydrogenchloride; iron in benzene

1: 24 percent / copper powder 2: 96 percent / activated iron, hydrogen chloride / benzene View Scheme

1: 1.) sodium nitrite, concentrated sulfuric acid; 2.) Gattermann copper 2: 24 percent / copper powder 3: 96 percent / activated iron, hydrogen chloride / benzene View Scheme

1: 44 percent / iodine 2: 1.) sodium nitrite, concentrated sulfuric acid; 2.) Gattermann copper 3: 24 percent / copper powder 4: 96 percent / activated iron, hydrogen chloride / benzene View Scheme

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