Glycols(Review） Syn hydroxylation of alkenes -osmium tetroxide,hydrogen peroxide -cold,dilute,basic potassium permanganate Anti hydroxylation of alkenes -peroxyacids,hydrolysis Glycols (Review) ❖Syn hydroxylation of alkenes ◼osmium tetroxide, hydrogen peroxide ◼cold, dilute, basic potassium permanganate ❖Anti hydroxylation of alkenes ◼peroxyacids, hydrolysis