с2н4+о2- co2+h2o
ch2=ch2+hoh- ch3-ch2-oh
ch2=ch2+br2- br-ch2-ch2-br
ch2=ch2+hbr- ch3-ch2br
ch2=ch2+h2- ch3-ch3
с2н4+о2- co2+h2o
ch2=ch2+hoh- ch3-ch2-oh
ch2=ch2+br2- br-ch2-ch2-br
ch2=ch2+hbr- ch3-ch2br
ch2=ch2+h2- ch3-ch3