Question

QUESTION 2 1. Which one of the following statements is true? (HX is either HCl or HBr) Alkynes undergo electrophilic substitution reactions with HX to give halogenated alkenes. Adding an excess of HX to an alkyne gftens times will stop the reaction at the alkene step instead of forming the halogenated alkane. When adding one mole of HX to an alkyne, regioselective Markovnikov addition is observed for the alkene product typically exhibiting trans stereochemistry When adding one mole of HX to an alkyne, regioselective Markovnikov addition is observed for the alkene product typically exhibiting is stereochemistry 1 points QUESTION 3 1. Dehydrohalogenation of (E)-1,2-dibromo-1-butene with potassium hydroxide in ethanol produces which product? 1,1,2,2-tetrabromobutane 1-Butyne (2)-1,2-dibromo-1-butene 1-bromo-1-butyne

Answer 1

2 () nd tha correct statemawc uoong 8Qcaus Alkynos unolorgp odditon Teacton with H orang Adding an excss Hx to alkyna laady aloganats alkang COTToct ong male as AX ack usith alkyna vgioselective Narkovnikov adau'on s obssrved tor alkuns Produet tyecally exbhiniting rons stzeocamistry a)uorong Toms-stoochems try ocsoae} BY MCHSCECBY HBY BY 1-bromo-1- bujne (E)-1,2-diorome -1 butsno mausisannd with 1-bromo- 1- butynu. CamScanner