Portmess Organic Review 15

Portmess Organic Review 15 - c. (2 R ,3 S...

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Separations and Purifications 1. Which of the following may be separated by ordinary physical methods? a. a pair of identical molecules b. a pair of enantiomers c. a pair of diastereomers d. a pair of identical atoms 2. Which of the following may be separated by ordinary physical methods? a. ( R )-3-bromo-1-butene and ( S )-3-bromo-1-butene b. cis -2-bromo-2-butene and trans -2-bromo-2-butene
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Unformatted text preview: c. (2 R ,3 S )-1,2-dibromobutane and (2 S ,3 R )-1,2-dibromobutane d. ( R )-2-bromobutane and ( S )-2-bromobutane Hydrocarbons 1. Place the following structures properly on the (abbreviated) energy surface for cyclohexane ring reversal. a. 1 = b or c, 2 = a, 3 = d, 4 = b or c b. 1 = d, 2 = b or c, 3 = d, 4 = a c. 1 = d, 2 = b or c, 3 = a d. 1 = b or c, 2 = d 3 = a, 4 = b or c...
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