C2H5OH-----H2SO4, t>180 x1+HBr x2 +NA x3 AlCl3,T x4 T----->-H2 x5
1) CH2=CH2 2) CH3CH2Br 3) C4H10 4) CH3-CH(CH3)-CH3 5) CH2=CH(CH3)-CH3
В 5й CH2=C(CH3)-CH3