Which compound can exist with two equatorial methyl groups? a) cis-1, 3-dimethylcyclohexane b) trans-1, 2-dimethylcyclohexane c)...
PART B: Cyclohexane Procedures: 1. Make a model of cis-1,2-dimethylcyclohexane and trans-1,2-dimethylcyclohexane. Do a ring flip of both *Draw the two conformation of the cis and trans cyclohexane structures above *List the number of axial and equatorial substituents for both the cis and trans *Which isomer is more stable overall, cis or trans? Why? 2. Make a model cis-1,3-dimethylcyclohexane and trans-1,3-dimethylcyclohexane. Do a ring flip *Draw the two conformation of the cis and trans cyclohexane structures above *List the number...
2. Draw the structures of the cis-trans isomers for each compound. Label them cis and trans. If no cis-trans isomers exist, write none. a. 2,3-dimethyl-2-pentene b. 1,1-dimethyl-2-ethylcyclopropane c. 1,2-dimethylcyclohexane d. 5-methyl-2-hexene e. 1,2,3-trimethylcyclopropane
Which of the following alkenes can exist as cis-trans isomers? 3-Methyl-2-hexene 1-Heptene 2-Methyl-2-hexeue 2-Heptene 3-Heptene
What is the IUPAC name of the compound shown below? cis-1, 3-dimethylcyclohexane trans-1, 3-dimethylcyclohexane cis-1, 4-dimethylcyclohexane tram-1, 5 -dimethyIcyclohexane Cyclohexane adopts the chair conformation rather than a planar structure because torsional strain is minimized. the C-C-C bond angles are close to 109.5degree. there are no 1, 3-diaxial interactions in a planar structure. only I only II I and II I, II, and III
Which of the statements below correctly describes the chair conformations of cis–1,3–dimethylcyclohexane? a. The two chair conformations are of equal energy. b. The higher energy chair conformation (least stable) contains one axial methyl group and one equatorial methyl group c. The lower energy chair conformation (most stable) contains one axial methyl group and one equatorial methyl group d. The higher energy chair conformation (least stable) contains two axial methyl groups Please show work for the correct answer.
b. Which of the following alkanes has the highest bolling point? 2,3-dimethylbutane: 2-methylpentane; 3-methylpentane; hexane c. Which of the following compounds can adopt a chair conformation in which there are no axial methyl groups? 1,1-dimethylcyclohexane; cis-1,2-dimethylcyclohexane; trans-1,2-dimethylcyclohexane; trans-1,3-di methylcyclohexane d. Which of the following compounds can adopt a chair conformation which there are no axial methyl groups? cis-1,2-dimethylcyclohexane; cis-1,3-dimethylcyclohexane; trans-1,3-dimethylcyclohexane; cis-1.4-dimethylcyclohexane cis-1,2-dimethvcyclohexane (Enter the numerical value only, without any units)? e. What is the approximate di hedral angle between the...
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Questions Which of the two conformations is favored at equilibrium? a. trans-1,2-dimethylcyclohexane (a/aor b. cis-1,3-dimethylcyclohexane (a/a)or 1. (ele) (ele) 2. How many gauche interactions are present in the trans 1.2-dimethylcyclohexane (a/a) conformer between the methyl groups and between the methy)l groups and the a. b. 2 c. 3 d. 4 e. None 3. How many gauche interactions are present in the trans-1,2-dimethylcyclohexane (e/e) conformer between the methyl groups and between the...
12. Erythronolide B is the biological precursor of erythromycin, a broad-spel antibiotic. How many chirality centers does erythronolide B have? H-C A CH, нсон CH / O HC H30H ***OH CHE Erythronolide B a. 8 b.9 c. 10 d. 11 13. Consider the two methyl groups indicated with letters in the following molecular model. These two groups are: a. A: axial B: axial b. A: axial B: equatorial c. A: equatorial B: axiald. A: equatorial B: equatorial 14. Which of...
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12. Construct cis-1,3-dimethylcyclohexane by placing both -CH, groups in the axial Which is the more positions. Do ring flips and examine the two chair conformations. stable conformation? Explain your answer (12) 13. Construet trans-1,3-dimethylcyclohexane by placin g one- CH3 group axial and the other equatorial. Do ring flips and examine the two chair conformations. the more stable conformation? Explain your answer (13a). Given the two1 trans-1,3-dimethylcyclohexane and cis-1,3-dimethyleyc stable isomer? Explain your answer...
Q11. The correct structure of trans-1-bromo-3-methyl cyclopentane is ...Br (A) (B) -Br Br (C) (D) *Br Q12. The correct order of increasing stability for the following conformations is CH, H Н. Н H H H CH2CH3 H Н CH,CH CH CH3CH2 CH H2C CH, H CH, I II III (A) III < III (C) II <I<III (B) I<III <II (D) I< II < III Q13. Identify the relationship between the following two Newman projections. CH, H НАС. H Н;С. Н...