Циклопропан -+h2--x-+cl2--x2-+na--x3-+hno2--x4

C3H6+H2=CH3-CH2-CH3
CH3-CH2-CH3+Cl2=[hv]=CH3-CHCl-CH3
2CH3-CHCl-CH3+2Na=[t]=CH3-CH(CH3)-CH(CH3)-CH3 
CH3-CH(CH3)-CH(CH3)-CH3+HNO3=CH3-CH(CH3)-C(NO2)(CH3)-CH3+H2O