СH3 - CH2 - CHCl - CH3 ------------> СH3 - CH = CH - CH3 + HCl
СH3 - CH = CH - CH3 + HBr -------> СH3 - CH2 - CHBr - CH3
СH3 - CH2 - CHBr - CH3 + H2 ---------> СH3 - CH2 - CH2 - CH3 + HBr
AlCl3,t
СH3 - CH2 - CH2 - CH3 -------------> СH3 - CH - CH3
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CH3