Which of the following two compounds are NOT enantiomers of each other? A. (+)-2-butanol and (-)-2-butanol B. (2R, 3R)-2, 3-dihdroxybutanoic acid and (2S, 3S)-2, 3-dihydroxylbutanoic acid C. (2R, 3S)-2, 3-dihdroxybutanoic acid and (2S, 3R)-2, 3-dihydroxylbutanoic acid D. (2R, 3R)-2, 3-dihdroxybutanoic acid and (2s, 3R)-2, 3-dihydroxylbutanoic acid The specific optical rotation of(-)-2-butanol is-135. The specific optical rotation of (+)-2-butanol is: 2. 3. Methyl iodide react with sodium ethoxide only by mechanistic symbol such as S_NI, S_N2, El, E2) (choose a 4. Which of the following leaving group is the poorest one? A. I^- B. H_2O C. CH_3OH D. OH^- 5middot The following molecules has stereoisomers. 6. The relationship between the following stereoisomers is ______ 7. Write the structure of a halide that is very unreactive in both S_NI and S_N2 reactions _____ 8. An example of good solvents for S_N2 reactions is structure or abbreviation) (Name, 9. ___ (name or a structure) is a good base to deprotonate acetylene (HC CH) 10. Give the structure of an alkene that can undergo allylic halogentation reaction with one molar equivalent Cl_2 producing a single allylic chloride