Which of the following molecules is/are chiral? CH3 CH3 CH3 H H CH3 H Select one: a. O b. A&B О с. B O d. B&C Oe. A O f. g. (A) (D) C&D&E D&B с CH3 H H (B) СН3, H H CH3 (E) H CH3 CH3 (C) OH
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- 3.) Which structure is a meso compound? А. В. С. D. CH3 CH3 CH3 CH3 H--C1 H--Ci H--c1 H--Cl Cl-- CH3 Cl--H H--c1 Cl--H CH3 CH2CH3 CH2CH3 A. Structure A B. Structure B C. Structure C D. Structure D Keywords: chiral, achiral, meso, internal, stereogenic center, asymmetric carbon, mirror-plane, absolute configuration, symmetry Concepts: Stereoisomerism, chirality3.) Which structure is a meso compound? А. B. с. D. CH3 CH3 CH3 CH3 H--ci ci-- CH3 H--ci H--ci H--ci Cl--H H--ci Cl--H CH3 CH2CH3 CH2CH3 A. Structure A B. Structure B C. Structure C D. Structure D Keywords: chiral, achiral, meso, internal, stereogenic center, asymmetric carbon, mirror-plane, absolute configuration, symmetry Concepts: Stereoisomerism, chiralityH. HO, 4. Identify the chiral centers in the following molecule and label each as R or S. ()
- Which of the following molecules are chiral? ОН ОН Me H.c=C=C Et Br Me HO Ph Ph Me Ph Me HO, C D B Select one: O a. All of them O b. A, B and D only O c. None of them O d. A, B and C only O e. A and C only .....5B. Are the pairs of structures shown below constitutional isomers, enantiomers, diastereomers, or the same? What is the degree of unsaturation for the compound in entry (e)? (a) (b) Me Me (c) F. H3C. ČH3 (e) (f) Et. ОН ОН Et Degree of unsaturation =3. Assign R or S configuration to the chirality centers of the following molecules; Cl CH3 CH3 а) b) HO C СООН СООН H;C H CH,CH3 H Br ОН CH,CH3 VIl. H ОН e) f) d) Cl H H OCH3 Br H. Br ...|| h) СООН HOCH, H3C CH3
- Which of the molecules shown are meso/ mesomeric? a. b. HN NH HN H. HO OH OH SCH, CO,H HO,C CI SCH, Molecules a, b, and d. All four molecules are meso. Molecules b and d. O Molecules c and d. Molecules a and d.3. Determine the relationship for the following pairs of structures. Use "E" for enantiomers, "D" for diastereomers, "C" for constitutional isomers, "S" for same, and "NS" (not same) for different compounds. a. b. с. d. е. f. Н н iPr "Де Br Br OH CH3 CH3 Ή OH OH OH Br Br CH3 CH3 Br -Н НО -Н H3C -ОН COOH Br Br Br Н H3C- Br OH CH3 Н CH3 iPr CH3 Н- -Br НО _H H OH OH CH3 ОН -OH COOH- с app.101edu.co Identify which of the following compounds is meso. I H₂CO H III H C H₂CO HCI Н A) 1 B) II Question 52 of 67 C) III D) IV OCH H₂CO "CH3 H C H CH₂ OCH₂ IV Н H₂CO H.C Н OCH, "H CH3 CH3 OCH₂ S В Sub
- 3. Give the relationship between the following molecules. Your options are enantiomers, diastereomers, or the same molecule. Determine R/S configurations of any chiral a. b. C. centers. H₂C-Si- H H CH3 COOH H -OH H-OH H -OH CH₂OH H₂ Br CH3 CO₂H Br H CH₂OH and HO H- HO H CH₂OH H -ОН H COOH and H₂C H H- Br Si CH3 CH3 CO₂H -Br -H CH2OHA B C D E 1. NaBH4 2. H3O+ 1. CH3MgBr 2. H3O+ 1. (CH3)2CuLi 2. H3O+ 1. CH3Li 2. H3O+ 1. (CH3CH2)2CuLi 2. H3O+Determine each of the following compounds whether it is chiral or achiral. а. b. CH, но. CH CH3 CH;- H NH2 С. d. СНО CH3 CH3 C. `CH,OH HO H H H. е. f. CH3 CH3 но g. HS HO H NH2