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- Which orbitals overlap to create the C-C a-bond in ethyne? Select one: O a. sp and sp O b. sp ands O c. sp? and sp? d. s and s e. sp and spPredict the major product of this series of reactions. The squiggly bond simply indicates the stereochemistry is unknown, i.e., wedge or dash. HBr compound I 1. NaH 2. compoundI 3. H2, Lindlar 4. Br2, H20 OH Br А. Br C. OH OH Br Br В. D. OH A.Which compounds are meso compounds? CH;CH2 CH2CH3 CH OH H Br a. b. HOC HOC- H. C. CH3 Br H
- Order the following in increasing priority A. -C, -CH, -OL B. -CH3, -CH2OH, -CH2CH3 C. -C≡CH, -CH゠CH2, -CH゠O1. Draw a star(*) to all stereogenic/chiral carbon(s) in these molecules; Ans HO HO. HO HO, OH 2. Label each chiral carbon either as R or S stereoisomers. OH а. b. HS HO. C. Br H. H2N H Ans 3. Give (draw) an example of a meso isomer. AnsHO. HO O Vitamin C 2 HO OH 2. The stereochemistry for the carbons 1 and 2 are a. 1R, 2R b. 1R, 2S C. 1S, 2R d. 1S, 2S e. None of the above
- 8) Identify enantiomers. C E A CI H ICL F CI H Cle H. CI H. CI H CI CI H. F H. 'F 'F H. F H H. F H H H. A) B and D, A and C B) B and D C) A and B, A and D, B and C, C and D D) B and D, A and B, A and D, B and C, C and D E) A and CA1.What is the degree of unsaturation of C8H10ClNO? a. 4 b. 5 c. 6 d. 7