Diazonium Salts & ReactionsAminesSandmeyer reaction reagents?Expert AnswerCu2Cl2/HClCu_2Cl_2/HClCu2Cl2/HCl , Cu2Br2/HBrCu_2Br_2/HBrCu2Br2/HBr , or CuCN/KCNCuCN/KCNCuCN/KCN .