АВ Алексей Васильев (CH3)2CH2 + Br2 = (CH3)2CHBr + HBr 2(CH3)2CHBr + 2Na = 2(CH3)2CH-CH(CH3)2 + 2NaBr (CH3)2CH-CH(CH3)2 + 2HNO3 = (CH3)2CNO2-CH(CH3)2 + CH3CHCH2NO2-CH(CH3)2