:( осуществите превращения: 1)пропанол-1 (h2so4конц., t) → x1 (br2) → x2 → пропин (h2o, hg2+) → x3 (h2, kat) → x4 2)c2h4 → c2h4cl2 (kohспирт.,t) → x1 (t, cакт.) → c6h6 (ch3cl, alcl3) → x2 (kmno4, h2so4) → c6h5cooh 3)cac2 (h2o) → x1 (h2o, hg2+) → x2 → ch3cooh (ba(oh)2) → x3 (t) → ch3-co-ch3