SEARCH Articles Figures Tables Acetylene half-hydrogenation Alkynes half-hydrogenation Dienes 1.3- , half hydrogenation Half-hydrogenated Half-hydrogenated Half-hydrogenated intermediate Half-hydrogenated state Half-hydrogenation of alkynes Half-hydrogenation times Hydrogen bonding half-live Hydrogen cyanide half-life Hydrogen half-cell Hydrogen half-life Hydrogen half-reaction Normal hydrogen electrode half-reactions Normal hydrogen half cell Standard hydrogen electrode half-cell Standard hydrogen half-cell Standard state hydrogen half-cell