![Convert the chair structure of this steroid to a flat structure using the template on the right side. [2 pts] CH3 H он но H CH3 CH3 7. Draw both chair conformations of the compounds given, calculate the steric strain for each conformation and give the difference in energy between the conformations. (You will need to use data from the lecture topic summary [3 pts each 6 ptsl CH3 CH3 (b) (You will also need the strain associated with a Br-CH, gauche interaction which is 2.0 kJ/mol) CH3 Br](http://img.homeworklib.com/questions/6f1b8710-d181-11ea-b99a-1f00c85c55b2.png?x-oss-process=image/resize,w_560)
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Convert the chair structure of this steroid to a flat structure using the template on the...
Provide the correct hexagonal conformation or Ring-flipped chair conformations clohexane (as parent chain) compounds. Then circle...
Provide the correct hexagonal conformation or Ring-flipped chair conformations clohexane (as parent chain) compounds. Then circle the more stable chair B-flipped chair conformations for the following Circle the more stable chair conformation. Flat Hexagon structure Chair conformation A Chair conformation B Сна Br L Br Z CH3
Following are the alternative chair conformations for trans-2-methylcyclohexanamine: NH2 NH2 CHз CH3 A Using the data...
Following are the alternative chair conformations for trans-2-methylcyclohexanamine: NH2 NH2 CHз CH3 A Using the data for AG for monosubstituted cyclohexanes at room temperature (25°C) and the representative value* for the gauche interaction of two equatorially positioned substituents in the 1,2-position: axial equatorial AG° (kJ/mol) Group AG° (kJ/mol) Group C=N NH2 CH3 1,2-gauche -5.9 -0.8 -2.4 -7.3 Br ОН -3.9 3.8 kJ/mol a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...
Following are the alternative chair conformations for trans-1,4-dimethylcyclohexane: . Using the data for ΔG for monosubstituted...
Following are the alternative chair conformations for
trans-1,4-dimethylcyclohexane:
.
Using the data for ΔG for monosubstituted cyclohexanes at room
temperature (25ºC) and the representative value* for the gauche
interaction of two equatorially positioned substituents in the
1,2-position:
a) Calculate the difference in the Gibbs free energy between
the second and first conformation including the algebraic sign.
kJ/mol
b) Given your value in (a), calculate the percent of the
chair, indicated as B, presented in an equilibrium mixture of the
conformers...
1. In the structure of the antibiotic Aztreonam illustrated below, how many nitrogen atoms have a...
1. In the structure of the antibiotic Aztreonam illustrated
below, how many nitrogen atoms have a sp2 hybridization
state?
2. What is the number of oxygen atoms on which the negative
charge will resonate by following relevant resonance structures?
(0,1,2,3,4 or 5)
3. Identify the stereochemistry of each of these double bonds
marked 1 and 2 in the structure below ((E) or (Z))
4. What is the absolute configuration of the following molecule?
(R/S)
5. Determine the relationship between these...
6. Draw the two chair conformations for cis-1-sec-butyl-2-ethylcyclohexane. Predict the most stable conformer and draw the...
6. Draw the two chair conformations for cis-1-sec-butyl-2-ethylcyclohexane. Predict the most stable conformer and draw the corresponding Newman projection (4 pts) 7. Convert the following compounds from their 3D structure to their Fisher projection and vice-versa (4 pts) НО Br HO co₂me HN CI CO2Me НО -СІ НЕОН СН2ОН 5| Page 8. The specific rotation for (R)-methyl 2-chloro-2,3-dihydroxypropanoate is -126.7. A student prepare a sample of methyl 2-chloro-2,3-dihydroxypropanoate enantiomers that shows a specific rotation of +89.6, (a) Calculate the percent...
Hello I have a question. Following are the alternative chair conformations for trans-2-bromocyclohexanamine: . Using the...
Hello I have a question.
Following are the alternative chair conformations for
trans-2-bromocyclohexanamine: . Using the data for ΔG for
monosubstituted cyclohexanes at room temperature (25ºC) and the
representative value* for the gauche interaction of two
equatorially positioned substituents in the 1,2-position: a)
Calculate the difference in the Gibbs free energy between the
second and first conformation including the algebraic sign. kJ/mol
b) Given your value in (a), calculate the percent of the chair,
indicated as B, presented in an...
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...
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...
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...
Provide the correct hexagonal conformation or Ring-flipped chair conformations clohexane (as parent chain) compounds. Then circle the more stable chair B-flipped chair conformations for the following Circle the more stable chair conformation. Flat Hexagon structure Chair conformation A Chair conformation B Сна Br L Br Z CH3
Following are the alternative chair conformations for trans-2-methylcyclohexanamine: NH2 NH2 CHз CH3 A Using the data for AG for monosubstituted cyclohexanes at room temperature (25°C) and the representative value* for the gauche interaction of two equatorially positioned substituents in the 1,2-position: axial equatorial AG° (kJ/mol) Group AG° (kJ/mol) Group C=N NH2 CH3 1,2-gauche -5.9 -0.8 -2.4 -7.3 Br ОН -3.9 3.8 kJ/mol a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic...
38. Provide the correct hexagonal conformation or Ring-flipped chair conformations for the following cyclohexane (as parent chain) compounds. Then circle the more stable chair conformation. Flat Hexagon structure Chair conformation A H Chair conformation B CHS 2 Dr 2 Br 3 CH3 2 5 3 39. The following compounds have 2 stereogenic carbons, therefore 4 stereoisomeric structures (3 if there is a meso-form) These are not cyclic compounds. a) Draw the structure. b) Identify the stereogenic carbons. Assign the Cahn-Ingold-Prelog...
Following are the alternative chair conformations for
trans-1,4-dimethylcyclohexane:
.
Using the data for ΔG for monosubstituted cyclohexanes at room
temperature (25ºC) and the representative value* for the gauche
interaction of two equatorially positioned substituents in the
1,2-position:
a) Calculate the difference in the Gibbs free energy between
the second and first conformation including the algebraic sign.
kJ/mol
b) Given your value in (a), calculate the percent of the
chair, indicated as B, presented in an equilibrium mixture of the
conformers...
1. In the structure of the antibiotic Aztreonam illustrated
below, how many nitrogen atoms have a sp2 hybridization
state?
2. What is the number of oxygen atoms on which the negative
charge will resonate by following relevant resonance structures?
(0,1,2,3,4 or 5)
3. Identify the stereochemistry of each of these double bonds
marked 1 and 2 in the structure below ((E) or (Z))
4. What is the absolute configuration of the following molecule?
(R/S)
5. Determine the relationship between these...
6. Draw the two chair conformations for cis-1-sec-butyl-2-ethylcyclohexane. Predict the most stable conformer and draw the corresponding Newman projection (4 pts) 7. Convert the following compounds from their 3D structure to their Fisher projection and vice-versa (4 pts) НО Br HO co₂me HN CI CO2Me НО -СІ НЕОН СН2ОН 5| Page 8. The specific rotation for (R)-methyl 2-chloro-2,3-dihydroxypropanoate is -126.7. A student prepare a sample of methyl 2-chloro-2,3-dihydroxypropanoate enantiomers that shows a specific rotation of +89.6, (a) Calculate the percent...
Hello I have a question.
Following are the alternative chair conformations for
trans-2-bromocyclohexanamine: . Using the data for ΔG for
monosubstituted cyclohexanes at room temperature (25ºC) and the
representative value* for the gauche interaction of two
equatorially positioned substituents in the 1,2-position: a)
Calculate the difference in the Gibbs free energy between the
second and first conformation including the algebraic sign. kJ/mol
b) Given your value in (a), calculate the percent of the chair,
indicated as B, presented in an...
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...
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...
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...
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