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Give reactions to convert: i) Ethene to Propyne ii) Ethyne to Propanol
A.S. answered 2 years ago i)ethene is CH2=CH2.. CH2=CH2 + Br2/CCl4 ----------> CH2(Br)-CH2(Br) ( ethylene dibromide) CH2(Br)-CH2(Br) + KOH (alc.) + heat ------------> CH=-CH (acetylene) =- is triple bond CH=-CH + NaNH2 in liq.NH3 -------> CH=-CNa (sodium acetylide) CH=-CNa + CH3I ----------> CH=-C-CH3 (propyne) ii) first make propyne from ethyne like above ....after that ... CH=-C-CH3 + H2/Pd / CaCO3 + S ----------> CH2=CH-CH3 ( propene) H2/Pd / CaCO3 + S is lindlars catalyst ... CH2=CH-CH3 + (BH3)2 + H2O2 /OH- --------> CH2(OH)-CH2-CH3 (propanol) this step is hydroboration-oxidation of alkenes ... feel free to ask any question
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