SEARCH Articles Figures Tables Acetylene, hydrogenation Chlorination hydrogen Chlorination using Hydrogen of acetylene Hydrogen phosphorus Hydrogen replacement Hydrogenation of acetylenes Of phosphorus pentachloride Pentachloride Phosphorus pentachlorid Phosphorus pentachloride Phosphorus pentachloride chlorination Phosphorus pentachloride replacement Replacement of chlorine Replacement of hydrogen Replacement, of acetylenic hydrogen