Reactions of Alkynes:Addition of HX and X2 Addition reactions of alkynes are similar to those of alkenes Intermediate alkene reacts further with excess reagent Regiospecificity according to Markovnikov's Rule Br H Br H CH CHCH2CH2C=CH HBr CH2CO2H CH CH2CH2CH,C=CH HBr CH CH2CH2CH2C-C-H 1-Hexyne 2-Bromo-1-hexene Br H 2,2-Dibromohexane CH,CH CH CH2C=CCH2CH HCI.NH CI C=C CH3CO2H 3-Hexyne CH,CH2 H (Z)-3-Chloro-3-hexene (95%) Reactions of Alkynes: Addition of HX and X 2 „ Addition reactions of alkynes are similar to those of alkenes „ Intermediate alkene reacts further with excess reagent „ Regiospecificity according to Markovnikov’s Rule