CH3-CH(CH3)-CH3---(X)-->C4H9Br---(KOH, spirt, t)-->...--(HBr, ROOR, t)-->...---(HC-=CNa)-->..--(H2O. H2SO4, HgSO4)--->???
1)CH3-CH(CH3)-CH3--(Br2, hv)-->CH3-C(Br)(CH3)-CH3+HBr
2)CH3-C(Br)(CH3)--(KOH, spirt, t)-->CH2=C(CH3)-CH3+H2O+KBr
3)CH2=C(CH3)-CH3---(HBr, ROOR, t)-->CH2(Br)-CH(CH3)-CH3
4)CH2(Br)-CH(CH3)-CH3---(HC-=CNa)-->???
Помогите пожалуйста((