Question

11. . Which of the following Fischer projections represent a pair of enantiomers? CHE CH2CH3 CH2 -HH-FCC-HB- H HCB-HB- CH2CH3 CH₂CH3 CH₂ HC1h a I and II d. II and III bil and y e. Ивие c I and IV

Answer 1

based on absolute configuration we identify the enantiomers

e "glo dei Rl@ @ CH₂ CH3 с , си, 1a Nole: In a directions. it clock wis R Anticlock wins but in a fischer least priority group Hydrogen on Horiganted position we write Reverse configurha According to R/ s ramenaulature CIP Rele. CH CH3 Сн, Н . a 1 and 1 are enantiomers. wote ina given caupouds Ther is no mirror Image so we follow based on absolute configulation. RlS in struche I and 11 ore like a rirrer Preage and nan Super Puposable configulatiaus. but in remaining a g R r s s b ) 1 & 111 11&1 l are Diastromero. S 1 1 & 191V