More substituted alkenes are lower in potential energy than less substituted alkenes due to increased hyperconjugation....
More substituted alkenes are lower in potential energy than less substituted alkenes due to increased hyperconjugation. Draw the hyperconjugation model that shows the overlap between an antiperplanar C-H bond and a p-orbital of an alkene.
Homework Answers
here is the conversion perohide toacetal during hypeconjucation decrease ansd increase in the potential from the antiplanar c-h bondand a p-orbital:
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More substituted alkenes are lower in potential energy than less
substituted alkenes due to increased hyperconjugation....
please answer all parts, thanks! 1. More substituted alkenes are more stable than less substituted alkenes....
please answer all parts, thanks!
1. More substituted alkenes are more stable than less substituted alkenes. Show the orbital overlap that helps to explain this observation. 2. Why is the heat of hydrogenation for an alkene exothermic? Analyze the bonds that are changing. AH = -30 kcal/mol Explain: + H2 3. Treating alkene "A" below with HBr can lead to a number of products. "A" SM + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters...
Recall that Zaitsev’s rule says that more substituted alkenes are more stable. Therefore, propene is less...
Recall that Zaitsev’s rule says that more substituted alkenes are more stable. Therefore, propene is less stable than trans-but-2-ene, which is less stable than 2-methylbut-2- ene, which is less stable than 2,3-dimethylbut-2-ene. In Chapter 7, we showed that we could demonstrate this stability ordering by using heats of hydrogenation. a) Does the same apply for other groups, besides alkyl groups? For example, compare the stability of propene, trans-but-2-ene and trans-1-chloroprop-1-ene to compare the effects of adding a chlorine instead of...
Passage 11 (Questions 1-9) Dienes, a special group of alkenes, can be classified as conjugated or...
Passage 11 (Questions 1-9) Dienes, a special group of alkenes, can be classified as conjugated or isolated. Conjugated dienes are alkenes with alternating double and single bonds. Isolated dienes have double bonds separated by more than one single bond. One explanation for this observation is the hybridization theory. According to the hybridization theory, the stability of conjugated dienes comes from the hybridization of the orbitals forming the carbon-carbon single bonds. For example, in 1,4-pentadiene, the C-C single bonds result from...
Chapter 11: 1. What is a prime rule in naming alkenes? a. Find the longest carbon...
Chapter 11: 1. What is a prime rule in naming alkenes? a. Find the longest carbon chain. b.Find the longest carbon chain containing the alkene. c. Find whether the alkene has a cis- or trans- configuration. d.Find how far the alkene functionality is from either end. 2. What is the IUPAC name of the following alkene? a. cis-5-methyl-2-heptene b. trans-2-ethyl-4-hexene c. trans-5-methyl-2-heptene d. trans-3-methyl-5-heptene 3. What is the hybridization, geometry, and bond angle of the carbon marked by an asterisk?...
Draw structures for the alkene (or alkenes) that gives the following reaction product. H3C ? H/Pd...
Draw structures for the alkene (or alkenes) that gives the following reaction product. H3C ? H/Pd CH2CH3 H3C CH3 • You do not have to consider stereochemistry. • Submit more than one structure only if the structures are constitutional isomers. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu. С P opy este *** [+ Draw the structure for an alkene...
In terms of chemical potential, less associated water corresponds to higher chemical potential, and more associated...
In terms of chemical potential, less associated water corresponds to higher chemical potential, and more associated water to a lower chemical potential than the reference state. Explain using free energy considerations.
1.. Which statement is correct about the changes in potential energy and kinetic energy when two...
1.. Which statement is correct about the changes in potential energy and kinetic energy when two N atoms combine to form an N2 molecule? Group of answer choices a. The potential energy becomes more negative and the kinetic energy increases. b. The potential energy becomes more positive and the kinetic energy decreases. c. The potential energy becomes more positive and the kinetic energy increases. d. The potential energy becomes more negative and the kinetic energy decreases. 2.. You take solid...
UUUUUUUUU 4. For an endothermic reaction: Is the energy of the products higher or lower than...
UUUUUUUUU 4. For an endothermic reaction: Is the energy of the products higher or lower than reactants? (circle one) b. Is heat released or absorbed c is the sign for AH positive or negative? S a. Since reactions are favorable when they release energy and form lower energy products, which reaction - (a) or (b) - is favorable? b. What is the sign (+ or -) for the energy (enthalpy) value of a favorable reaction Manager: Check to ensure that...
2. a. Draw the potential energy diagram for the rotation of the C-C bond in 1,2-dichloroethane...
2. a. Draw the potential energy diagram for the rotation of the C-C bond in 1,2-dichloroethane through 360° starting with the most stable conformer. Anti is 1.2 kcal/mol more stable than gauche. The gauche conformer is flanked by two energy barriers, 5.2 and 9.3 kcal/mol. b. Draw the conformer that is present in greatest concentration. c. Estimate the difference in stability between the most and least stable.
6) The twisted boat conformation of cyclohexane is actually a slightly lower energy conformation than the...
6) The twisted boat conformation of cyclohexane is actually a slightly lower energy conformation than the boat conformation. Which of the following accurately describes one factor involved in this structural behavior? A) lower angle strain in the boat B) higher torsional strain in the twisted boat C) fewer unfavorable steric factors in the twisted boat D) increased rotational freedom in the boat E) lower bond strain in the boat
please answer all parts, thanks!
1. More substituted alkenes are more stable than less substituted alkenes. Show the orbital overlap that helps to explain this observation. 2. Why is the heat of hydrogenation for an alkene exothermic? Analyze the bonds that are changing. AH = -30 kcal/mol Explain: + H2 3. Treating alkene "A" below with HBr can lead to a number of products. "A" SM + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters...
Passage 11 (Questions 1-9) Dienes, a special group of alkenes, can be classified as conjugated or isolated. Conjugated dienes are alkenes with alternating double and single bonds. Isolated dienes have double bonds separated by more than one single bond. One explanation for this observation is the hybridization theory. According to the hybridization theory, the stability of conjugated dienes comes from the hybridization of the orbitals forming the carbon-carbon single bonds. For example, in 1,4-pentadiene, the C-C single bonds result from...
Draw structures for the alkene (or alkenes) that gives the following reaction product. H3C ? H/Pd CH2CH3 H3C CH3 • You do not have to consider stereochemistry. • Submit more than one structure only if the structures are constitutional isomers. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu. С P opy este *** [+ Draw the structure for an alkene...
UUUUUUUUU 4. For an endothermic reaction: Is the energy of the products higher or lower than reactants? (circle one) b. Is heat released or absorbed c is the sign for AH positive or negative? S a. Since reactions are favorable when they release energy and form lower energy products, which reaction - (a) or (b) - is favorable? b. What is the sign (+ or -) for the energy (enthalpy) value of a favorable reaction Manager: Check to ensure that...
2. a. Draw the potential energy diagram for the rotation of the C-C bond in 1,2-dichloroethane through 360° starting with the most stable conformer. Anti is 1.2 kcal/mol more stable than gauche. The gauche conformer is flanked by two energy barriers, 5.2 and 9.3 kcal/mol. b. Draw the conformer that is present in greatest concentration. c. Estimate the difference in stability between the most and least stable.
6) The twisted boat conformation of cyclohexane is actually a slightly lower energy conformation than the boat conformation. Which of the following accurately describes one factor involved in this structural behavior? A) lower angle strain in the boat B) higher torsional strain in the twisted boat C) fewer unfavorable steric factors in the twisted boat D) increased rotational freedom in the boat E) lower bond strain in the boat
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