Which of the following reasons best explain the relative stabilities of the conformers shown below? I. H H CH3 CH3 H H II. H H CH3 H H CH3 O I is eclipsed and has most steric hindrance of methyl groups O I is staggered and has least steric hindrance methyl groups O II is staggered with least gauche interaction of methyl groups O II is eclipsed with least gauche interaction of methyl groups

Which of the following reasons best explain the relative stabilities of the conformers shown below? I. H H CH3 CH3 H H II. H H CH3 H H CH3 O I is eclipsed and has most steric hindrance of methyl groups O I is staggered and has least steric hindrance methyl groups O II is staggered with least gauche interaction of methyl groups O II is eclipsed with least gauche interaction of methyl groups

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Which of the following best explains the reason for the relative stabilities of the conformers shown? II. H3C CH3 I. H CH3 ... -H -- H. H3C H A I has more steric strain. B Il has more torsional strain. I has more torsional strain. D II has more steric strain.
Which of these conformations is expected to be the lowest in energy, and which shows the conformation required for an E2 elimination? CI CI CI CH3 - H. „CH3 H `CH3 `CH3 CH3 H ČH3 1 2 3 is lowest energy; 2 or 3 is required for E2 elimination 3 is lowest energy; 1 is required for E2 elimination O 1 is lowest energy; 2 or 3 is required for E2 elimination O 1 is lowest energy; 2 is required for E2 elimination O 2 is lowest energy; 3 is required for E2 elimination
Associate each structure or formula with its degree of unsaturation: CH3OH XE HN 5 H3C �� Choose... 8 4 10 9 11 12 6 A CH3 C13H12N2O4 BI TO CH3 NH C21H30OBr2 D Next page
Draw all three staggered conformations for the following compound, viewed along the C₂-C3 bond. Determine which conformation is the most stable, taking into account gauche interactions and hydrogen-bonding interactions. (J. Phys. Chem. A 2001, 105, 6991-6997) Provide a reason for your choice by identifying all of the interactions that led to your decision. H₂C OH C₂ HO CH3 Which of the following is the most stable staggered conformer? Me Me *** Conformer B Me- Me Conformer A Me Conformer C Me Conformer B because the anti OH groups avoid hydrogen bonding, which is a destabilizing effect. Conformer A because there are only two gauche interactions, and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer C because there is no steric strain for Me-OH gauche interactions and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer B because the large OH groups are anti to each other.
8. Arrange the following conformers of 2-methylbutane in increasing stability. H CH3 H3C CH3 CH3 H3C Н. CH3 H3C, CH3 CH3 H3C H3C CH3 H 4 1 2 А. 1, 2,3, 4 В. 2, 1, 3, 4 С. 4,2,3,1 D. 2,3,1,4 Ill!
cỌH CH2OH ОН Н На H ÓH In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: Group b: Group c:
Q#1 Calculate the number of degrees of unsaturation for each molecular formula. SHOW WORK. C401 i56 d. C8H9BR e. C8H9CIO f. C7H11N g. C4H8BRN h. C10H18CINO
H3C HC 10 aH CH3 In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: Group b: Group c:
B. Select the choice that best describes the relationship (conformers, constitutional isomers, diastereomers, enantiomers) between the following structures, with explanation. OH Br OH H, CH2CH3 Br но H* CH3 H3C Br CH,CH3 OH i. ii.
Order the conformations of butane from lowest energy to highest energy (1 being the lowest energy). CH₂ H. H A B C D H A CH₂ H H₂ H CH3 CH₂ B H 'H H₂C CH₂ H H 4 1 3 2 -H 'H H H CH₂ H D -CH₂ H
. How many degrees of unsaturation are present in each compound? Propose possible structures from the answer of each compound. a. C„H2 c. CgH6 b. C3H4 d. C3H18
Which of the following is a pair of stereoisomer? H3C(H3C)HC CH3 HỌ CH3 HO- CH(CH3)CH3 H3CH2C´ H3CH2C A В OH CH(CH3)CH3 ICH(CH3)CH3 CH2CH3 ICH3 H3C H3CH2C OH D O a. A& B O b. A& D B&C