Calculate the strain energy
of the molecules above using the given strain energy increments
from the given table.
Homework Answers
Add Answer to:
Calculate the strain energy
of the molecules above using the given strain energy increments
from the...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly shown are in the staggered conformation. 1. Torsional strain 2. Angle (ring) strain 3. Steric (van der Waals) strain CH3 H H H. H CH3 Calculate strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol 4.0 1.0 H: H eclipsing H: CH3 eclipsing CH3 : CH3 eclipsing 5.8 1.4 11.0...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments)...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keq, and then use this value to find the percentage.) OH H3C...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calcula...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keq, and then use this value to find the percentage.) A CH3...
Strain Energy Increments Strain Energy for Alkanes Interaction/Compound kJ/mol kcal/ 4.0 H: Heclipsing 1.0 H: CH3...
Strain Energy Increments Strain Energy for Alkanes Interaction/Compound kJ/mol kcal/ 4.0 H: Heclipsing 1.0 H: CH3 eclipsing 5.8 1.4 CH3 : CH3 eclipsing 11.0 2.6 gauche butane 3.8 0.9 cyclopropane 115 27.5 cyclobutane 110 26.3 cyclopentane 26.0 6.2 6.3 cycloheptane 26.2 cyclooctane 40.5 9.7 Axial Strain Energies for Monosubstituted Cyclohexanesab This table gives the sum of the values for the 1,3 diaxial interactions of the substituent with two hydrogen atoms. kJ/mol kcal/mol Substituent(solvent) -CH3 1.7 7.3 CH2CH3 7.5 1.8 -CH(CH3)2...
Strain Energy Increments Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol H: Heclipsing 4.0 1.0 H: CH3...
Strain Energy Increments Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol H: Heclipsing 4.0 1.0 H: CH3 eclipsing 5.8 1.4 CH3 : CHз eclipsing 11.0 2.6 gauche butane 3.8 0.9 cyclopropane 27.5 115 cyclobutane 110 26.3 cyclopentane 26.0 6.2 cycloheptane 26.2 6.3 cyclooctane 40.5 9.7 Ln Axial Strain Energies for Monosubstituted Cyclohexanesa,b This table gives the sum of the values for the 1,3 diaxial interactions of the substituent with two hydrogen atoms. Substituent(solvent) К/mol kcal/mol -CНз 7,3 1,7 -CH-CHз...
Problem #8. The strain energy of a cyclic hydrocarbon can be estimated using the experimental enthalpy...
Problem #8. The strain energy of a cyclic hydrocarbon can be estimated using the experimental enthalpy of formation of that compound and the calculated enthalpy of formation for a hypothetical strain-free ring. This would be a ring containing an infinite number of methylene (CH2) groups. Calculated AH for AH per CH2 strain-free (kcal/mol) molecule (kcal/mol) Strain Energy per CH2 (kcal/mol) + 4.2 - 14.7 Strain Energy (kcal/mol) 27.4 26.4 5.8 9.1 + 1.7 - 19.6 - 3.7 - 24.5 Measured...
Identify and count the interactions that destabilize the following conformation, and compute its strain energy using...
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.) HCH3 Hafa C CH Strain Energy Increments H Interaction Strain (kJ/mol) H eclipsing 4.0 H CH3 eclipsing 6.0 CH3 CH3 eclipsing 11.0 CH3 – CH3 gauche 3.8 H-H eclipsing C H -CH: eclipsing C CH3-CH3 eclipsing C CH3-CH3 gauche Total strain energy is kJ/mol
Using the table below, calculate the difference in energy between a) the lowest energy conformations of...
Using the table below, calculate the difference in energy between a) the lowest energy conformations of cis- and trans-1,2-dimethylcyclohexane. b) the highest and lowest energy conformations of methyl cyclohexane, trans-1,2-dimethylcyclohexane and cis-1,3-dimethylcyclohexane Type of Strain Interaction Associated Energy Eclipsing of a pair of H's 4kj/mol Eclipsing of a H and a CH3 group 6kj/mol Eclipsing of a pair of CH3 groups 11kj/mol Gauche (60) Interactin between CH3 Groups 3.8 kj/mol 1,3 CH3 to H Interaction on Cyclohexane Chair 3.8kj/mol 1,3...
Part A Calculate the amount of steric strain in H CH3 СН3 Express your answer using...
Part A Calculate the amount of steric strain in H CH3 СН3 Express your answer using two significant figures. V AC mo ? a total strain energy = kcal/mol Submit Request Answer Review Constants 1 Per Part B Calculate the amount of steric strain in CH3 CH3 CH3 Express your answer using two significant figures. IVO AQ RO ? a total strain energy = kcal/mol Submit Request Answer Part C Which conformer would predominate at equilibrium? CH3 H ΤΗ O...
References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of...
References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, fir calculate Keaq, and then use this value to find the percentage.) CH3 CH3 Answers: a. The energy difference is 4 b. In the more...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly shown are in the staggered conformation. 1. Torsional strain 2. Angle (ring) strain 3. Steric (van der Waals) strain CH3 H H H. H CH3 Calculate strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol 4.0 1.0 H: H eclipsing H: CH3 eclipsing CH3 : CH3 eclipsing 5.8 1.4 11.0...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keq, and then use this value to find the percentage.) OH H3C...
a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keq, and then use this value to find the percentage.) A CH3...
Strain Energy Increments Strain Energy for Alkanes Interaction/Compound kJ/mol kcal/ 4.0 H: Heclipsing 1.0 H: CH3 eclipsing 5.8 1.4 CH3 : CH3 eclipsing 11.0 2.6 gauche butane 3.8 0.9 cyclopropane 115 27.5 cyclobutane 110 26.3 cyclopentane 26.0 6.2 6.3 cycloheptane 26.2 cyclooctane 40.5 9.7 Axial Strain Energies for Monosubstituted Cyclohexanesab This table gives the sum of the values for the 1,3 diaxial interactions of the substituent with two hydrogen atoms. kJ/mol kcal/mol Substituent(solvent) -CH3 1.7 7.3 CH2CH3 7.5 1.8 -CH(CH3)2...
Strain Energy Increments Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol H: Heclipsing 4.0 1.0 H: CH3 eclipsing 5.8 1.4 CH3 : CHз eclipsing 11.0 2.6 gauche butane 3.8 0.9 cyclopropane 27.5 115 cyclobutane 110 26.3 cyclopentane 26.0 6.2 cycloheptane 26.2 6.3 cyclooctane 40.5 9.7 Ln Axial Strain Energies for Monosubstituted Cyclohexanesa,b This table gives the sum of the values for the 1,3 diaxial interactions of the substituent with two hydrogen atoms. Substituent(solvent) К/mol kcal/mol -CНз 7,3 1,7 -CH-CHз...
Problem #8. The strain energy of a cyclic hydrocarbon can be estimated using the experimental enthalpy of formation of that compound and the calculated enthalpy of formation for a hypothetical strain-free ring. This would be a ring containing an infinite number of methylene (CH2) groups. Calculated AH for AH per CH2 strain-free (kcal/mol) molecule (kcal/mol) Strain Energy per CH2 (kcal/mol) + 4.2 - 14.7 Strain Energy (kcal/mol) 27.4 26.4 5.8 9.1 + 1.7 - 19.6 - 3.7 - 24.5 Measured...
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.) HCH3 Hafa C CH Strain Energy Increments H Interaction Strain (kJ/mol) H eclipsing 4.0 H CH3 eclipsing 6.0 CH3 CH3 eclipsing 11.0 CH3 – CH3 gauche 3.8 H-H eclipsing C H -CH: eclipsing C CH3-CH3 eclipsing C CH3-CH3 gauche Total strain energy is kJ/mol
Part A Calculate the amount of steric strain in H CH3 СН3 Express your answer using two significant figures. V AC mo ? a total strain energy = kcal/mol Submit Request Answer Review Constants 1 Per Part B Calculate the amount of steric strain in CH3 CH3 CH3 Express your answer using two significant figures. IVO AQ RO ? a total strain energy = kcal/mol Submit Request Answer Part C Which conformer would predominate at equilibrium? CH3 H ΤΗ O...
References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, fir calculate Keaq, and then use this value to find the percentage.) CH3 CH3 Answers: a. The energy difference is 4 b. In the more...
Most questions answered within 3 hours.
-
Please answer true or false. Words
cannot be changed or added in to make it true...
asked 54 minutes ago -
An empty test tube weighs 15.923 grams. Then,
MgCl2•6H2O is added into the test tube. After...
asked 56 minutes ago -
(a) A piston at 6.1 atm contains a gas that occupies a volume of
3.5 L....
asked 55 minutes ago -
Assume memory access is 10 units of time and disk access is
10000 units of time....
asked 1 hour ago -
1. Are all good samples random?
2. Magazines often report surveys giving statistics such as “63%...
asked 1 hour ago -
Under all the various types of market structures, firms
must eventually earn some economic profits for...
asked 1 hour ago -
Consider the following fitness regime for a single locus trait
with two co-dominant alleles: w11 =...
asked 1 hour ago -
A large cable company reports the following.
80% of its customers subscribe to its cable TV...
asked 1 hour ago -
Please answer the question in brief.
Discuss the role of ERP in organizations. Are ERP tools...
asked 1 hour ago -
Discuss the pros and cons of collaborative software such
as SameTime. Does it increase productivity? What...
asked 1 hour ago -
Buying your in-laws a gift because it’s expected is
due to the ____________ motive of gift-giving....
asked 1 hour ago -
Calculate the expected value, the variance, and the standard
deviation of the given random variable X....
asked 2 hours ago