1: NaNO2; aqueous HNO3; H3PO4 / anschliessend Einwirkung von Kupfer in wss. HCl 2: red phosphorus; aqueous HI; acetic acid 3: as2O5; concentrated H2SO4 View Scheme

1: bromine; CHCl3 / Behandeln des Reaktionsprodukts mit wss. Bisulfit 2: NaNO2; aqueous HNO3; H3PO4 / anschliessend Einwirkung von Kupfer in wss. HCl 3: red phosphorus; aqueous HI; acetic acid 4: as2O5; concentrated H2SO4 View Scheme

1: red phosphorus; aqueous HI; acetic acid 2: as2O5; concentrated H2SO4 View Scheme

1: Raney nickel; benzene; H2O / Hydrogenation 2: red phosphorus; aqueous HI; acetic acid 3: as2O5; concentrated H2SO4 View Scheme

diarsenic pentoxide; sulfuric acid