CHEM 2211 1st Edition Lecture 21 Outline of Last Lecture I II Alkyne introduction Naming Outline of Current Lecture I II III IV V VI Reactivity of alkynes Reaction of 1 mol equivalent of HX Reaction with excess HX Reaction with 1 mol equivalent of X2 Reaction with excess X2 Acid Catalyzed reaction with water Current Lecture I Reactivity of Alkynes a Less reactive than alkenes b Reactive in this order II Reaction with 1 mole equivalent of HX a 2 ways of reacting i Dissociation of electrons preferred by alkynes ii Vinylic 2 carbocation III b Markovnikov Additon c Adds to opposite sides Trans E Reaction with excess HX IV a Markovnikov Addition b Leads to germinal halogens on the same carbon Reaction with 1 mole equivalent X2 V a Markovnikov addition b Trans E Reaction with excess X2 VI a Leads to two sets of germinal Chlorine Acid Catalyzed Addition of Water a Leads to either a ketone internal alkyne or an aldehyde terminal alkyne b The enol stage is very unstable and collapses into the keto stage
View Full Document
Unlocking...