Carry out transformations: propane – pentane – trichloropentane

Let us write down the reaction equations for alkanes:
C3H8 + Br2 = C3H7Br + HBr – substitution reaction, bromopropane was obtained;
C3H7Br + 2Na + C2H5Br = C5H10 + 2NaBr – Wurtz reaction, pentane was formed;
С5Н10 + Cl2 = C5H9Cl + HCl – substitutions, chloromethane is released;
C5H9Cl + Cl2 = C5H8Cl2 + HCl – substitution, dichloropentane is formed;
С5Н8Сl2 + Cl2 = C5H7Cl3 + HCl – substitutions, trichloropentane was obtained.
These reactions show that propane and pentane are homologues, they are characterized by substitution reactions. Reaction products – halogenated bromopropane, chloropentane, trichloropentane – are used as solvents.