Identify and count the interactions that destabilize the following conformation, and compute its strain energy using the values provided in the table. (Be sure to specify units and to enter zero for interactions not present.) HH H3C H3C CH3 CH₂ Strain Energy Increments Interaction Strain (kJ/mol) HH eclipsing 4.0 H→ CH3 eclipsing 6.0 CH3 CH3 eclipsing 11.0 CH3 CH3 gauche + 3.8 H-H eclipsing H-CH, eclipsing CH2-CH3 eclipsing CH, CHauche Total strain energy is kJ/mol Submit Answer Try Another Version 10 item attempts remaining

Identify and count the interactions that destabilize the following conformation, and compute its strain energy using the values provided in the table. (Be sure to specify units and to enter zero for interactions not present.) HH H3C H3C CH3 CH₂ Strain Energy Increments Interaction Strain (kJ/mol) HH eclipsing 4.0 H→ CH3 eclipsing 6.0 CH3 CH3 eclipsing 11.0 CH3 CH3 gauche + 3.8 H-H eclipsing H-CH, eclipsing CH2-CH3 eclipsing CH, CHauche Total strain energy is kJ/mol Submit Answer Try Another Version 10 item attempts remaining

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 4E: Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This...

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Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
Identify and count the interactions that destabilize the following conformation, and compute its strain energy using the values provided in the table. (Be sure to specify units and to enter zero for interactions not present.) HH H3C ← H3C Interaction CH 3 4 HH eclipsing H→ CH3 eclipsing CH3 Strain Energy Increments CH3 CH3 Strain (kJ/mol) 4.0 6.0 CH3 eclipsing 11.0 CH3 gauche 3.8 H-H eclipsing ⒸH-CH3 eclipsing Total strain energy is kJ/mol CH3-CH3 eclipsing CH3-CH3 gauche
Rank the following structures in terms of conformational stability. If two or more are of equal stability, ndicate this. Justify your answer with chair conformations. B с Ꭰ |||
all of the drop-downs say 0, 1, 2, 3, 4
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For the drawing and energy values given, calculate the barrier to rotation in kJ/mol for conformation I converting to conformation II.
For the following two conformations of 2,3-dimethylbutane, determine (choose 1 option below) the total energy cost associated with all torsional strain and steric strain. 1. a) (6 kJ/mol x 2) + (11 kJ/mol x3) = 45 kJ/mol b) 3.8 kJ/mol x 4 = 15.2 kJ/mol c) 3.8 kJ/mol x 3 = 11.4 kJ/mol d) 11kJ/mol x 4 = 44 kJ/mol 2. a) 6 kJ/mol + 11 KJ/mol= 17 kJ/mol b) 3.8 kJ/mol x 3 = 11.4 kJ/mol c) (6kJ/mol x 2 ) 3.8 kJ/mol = 15.8 kJ/mol d) (6kJ/mol x 2 ) + 11kJ/mol = 23 kJ/mol
What's the stablest conformation Newmann projection for this molecule looking down the C3-C4 bond?
through the C2-C3 bond (identify which is which). 2. Draw cis-1,4-dibromocyclohexane in a chair conformation and determine the approximate strain energy using literature 1,3-diaxial strain energy values. SICE Innolaupsib to cont notam os To moitasto Jab nousmmoines
Draw (1R,3S)-1,3-dimethylcyclohexane, in its minimum energy conformation. Then draw the Newman Projection for this structure with the correct stereochemistry and in its minimum energy state.
Calculate strain energy for the conformer picture below, using strain energy increments from the table. And please can you double check the work I have send this in last time and have gotten it incorrect.
2. Chair Strain (a) Consider the following cyclohexane derivative. Circle the location (axial or for each substituent in this molecule's most stable chair conformer. (b) (c) ( F axial equatorial Br axial equatorial Br CH3 Ph axial equatorial Ph CH3 axial equatorial equatorial) Draw the chair conformer described in (a), adding only the substituents (not the hydrogen groups of those stereocenters) onto the template below. O Complete the table, indicating how many of each type of interaction is present in total for the chair conformer described in (a). gauche interactions between gauche interactions substituents and the ring between substituents 1,3-diaxial interactions between substituents (d) ( Draw the other conformer that results from a chair flip onto the template below. Ma the changes that happen in the chair flip, but don't make other changes. Only draw substituer