Осуществите ряд превращений
C3H8 → C3H6 + H2 C3H6 + HCl → C3H7Cl 2C3H7Cl + 2Na → C6H14 + 2NaCl C6H14 → C6H12 + H2 C6H12 → C6H6 + 3H2 C6H6 + Br2 → C6H5Br + HBr