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5. The central carbon of the tert-butyl carbocation is: A sp hybridized with a +1 formal charge B. sp hybridized with a 0 formal charge C. sp hybridized with a +1 formal charge D. sp hybridized with a 0 formal charge 6. How many chiral centers are there in the following molecule? Mark them with an asterisk. A)2 B) 3 C) 4 D)5 2. Which of the following molecules are chiral? Hint: draw the planar structures; pay attention to the direction of the substituents. CI CI CI A) only II B) only II C I and III D) I. II, and II 8. The most specific description of the relationship between the following two molecules ist? Hint: draw their Fischer projections CH, C-Br C-CH2CH, CH,CHandB A) identical B)isomers C) enantiomers D) diastereomers 9. (+Tartaric acid has a specific rotation of +12.0P. What is the specific rotation of a mixture of 75% (+)-tartaric acid and 25% (ナtartaric acid? A) +4.0° B) +8.0 C) +6.0 D) +9.0°

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$. The central carbon of the tert-butyl carbocation is: CH3 A. sp hybridized with a +1 fomal ch yondized with a 0 formal charge C. sp hybridized with a +1 formal charge D. sp hybridized with a 0 formal charge Sp2 carbon 6 How many chiral centers are there in the folowing molecule? Mark them with an asterisk having +1 charge A)2 B) 3 C)4 D) s HO All 5 chiral carbons were represented with asterisk Compound I an ll are having plane of symmetry Z. Which of the following molecules are chiral? Hint: draw the planar structures; pay attention to the direction of the Cl Cl CI Cl Ci Cl Cl A) only II B) only III C) II and III D) L. II, and III 8. The most specific description of the relationship between the following two molecules is? Hint: draw their Fischer projections HC(S) C CH,CH and / CHCH2 A) identical! B) isomers C) enantiomers D) diastereomers 2. (Tartaric acid has a specific rotation of +12.0°. What is the specific rotation of a mixture of 75% (+htartanc acid and 25% (-)-tartaric acid? A) +4.0° B) +8.0° Enantiomeric excess of (+)-tartaric acid = 50 % so; specific rotation is half of the (50%) of (+)-tartaric acid

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