Homework Answers
1) least stable alkene (highest in energy) is: C
most stable alkene (lowest in energy) is: A
Explanation: more substituted alkene is most stable and less substituted alkene is least stable. so tri substituted alkene is more stable and mono substituted alkene is least stable.
2) least stable alkene (highest in energy) is: B
most stable alkene (lowest in energy) is: C
Explanation: Tetra substituted alkene is most stable and mono substituted alkene is least stable.
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H3C CH2CH3 13 H2C=C CH2CH(CH3)2 H2C=C н H2CH CH2CH2CH3 Which of the alkenes above is the...
H2C CH2CH3 CH3 crc CH2CH(CH3)2 H2C=C TEH H2C=C CH2CH2CH3 HzC Which of the alkenes above is...
H2C CH2CH3 CH3 crc CH2CH(CH3)2 H2C=C TEH H2C=C CH2CH2CH3 HzC Which of the alkenes above is the least stable (highest in energy)? Which is the most stable (lowest in energy)? _ Submit Answer Retry Entire Group 2 more group attempts remaining [Review Topics (References CHCH3 CH=CH2 -СН3 Which of the alkenes above is the least stable (highest in energy)? Which is the most stable (lowest in energy)? _ Submit Answer Retry Entire Group 2 more group attempts remaining eg
1. 2. 3. H3C CH2CH3 0% CH3 CH2CH(CH32 Hc CH2CH2CH Which of the alkenes above is...
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2.
3.
H3C CH2CH3 0% CH3 CH2CH(CH32 Hc CH2CH2CH Which of the alkenes above is the least stable (highest in energy)? |--I Which is the most stable (lowest in energy)? Submit Answer Retry Entire Group 4 more group attempts remaining
TRetetences Provide an IUPAC name for each of the compounds shown. (Specify (EY(Z) stereochemistry, if relevant...
TRetetences Provide an IUPAC name for each of the compounds shown. (Specify (EY(Z) stereochemistry, if relevant for straight chain alkenes only. Pay attention to commas, dashes, etc.) CH2CH3 CH₃ CH2CH3 CH3CH2CH2 c= H3CH2CH2CH Submit Answer Try Another Version 10 item attempts remaining ipt Draw the structure of (E)-2,3,5-trimethyl-3-hexene. 1 pt 1pt . Consider E/Z stereochemistry of alkenes. • You do not have to explicitly draw H atoms. 1pt 1 pt co-TY,000- Submit Answer T ry Another W on 10 men...
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV a)...
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV a) I b) II c) III d) IV e) V
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV...
(References) Provide an IUPAC name for each of the compounds shown. (Specify (E) (Z) stereochemistry, if...
(References) Provide an IUPAC name for each of the compounds shown. (Specify (E) (Z) stereochemistry, if relevant for straight chain alkenes only. Pay attention to commas, dashes, etc.) CIH,C CHCI C=C н H CH(CH3)2 H2C сна Submit Relry Entire Group 7 more group attempts remaining Provide an IUPAC name for each of the compounds shown (Specify (E) (Z) stereochemistry, if relevant, for straight chain alkenes only. Pay attention to commas, dashes, etc.) нс сн; C=C H3C-CH HC-CH3 сна CH3 CH3...
For the gas phase isomerization of isopropenyl allyl ether, CH2=C(CH3)-O-CH2CH=CH2– CH3COCH2CH2CH=CH2 the rate constant...
For the gas phase isomerization of isopropenyl allyl ether, CH2=C(CH3)-O-CH2CH=CH2– CH3COCH2CH2CH=CH2 the rate constant has been determined at several temperatures. When In k in sis plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of -1.48x104 K and a y-intercept of 26.0. The activation energy for the gas phase isomerization of isopropenyl allyl ether is kJ/mol. Submit Answer Retry Entire Group 8 more group attempts remaining For the gas phase decomposition of isobutyl bromide,...
please help! [References] [Review Topics) Use the References to access important values if needed for this quest...
please help!
[References] [Review Topics) Use the References to access important values if needed for this question 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...
The chemical environment of protons can be deduced from their chemical shifts. What are the relat...
The chemical environment of protons can be deduced from their chemical shifts. What are the relat that are highly shielded have low delta (chemical shift) values.] 1) 0 The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is 2) The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is Submit Answer Retry Entire Group 6 more...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе mos...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе most stable least stable (a) I (b) I (c) I ll (d) 7) Order the following C-H bonds from strongest to weakest. strongest weakest (a) (b) (c) II (d) 8) Which of the following is represents the lowest energy transition state for the addition of BH, to 2-methyl-1-propene? quCH «сHs нСи Нас (b) (a) Нив--н H H...
H3 C H2Br Br2, H30* HC X CH3 HzC CH3 H3C CH3 Aldehydes and ketones can...
H3 C H2Br Br2, H30* HC X CH3 HzC CH3 H3C CH3 Aldehydes and ketones can be halogenated at their a-position by reaction with Cl, Br, or 12, under acidic conditions. Using Br2 under acidic conditions, an intermediate enol is formed which adds bromine at the a-position. The reaction stops after the addition of one bromine because the electron-withdrawing halogen decreases the basicity of the carbonyl oxygen, making the protonation less favorable. Not started curved arrows to show the movement...
H2C CH2CH3 CH3 crc CH2CH(CH3)2 H2C=C TEH H2C=C CH2CH2CH3 HzC Which of the alkenes above is the least stable (highest in energy)? Which is the most stable (lowest in energy)? _ Submit Answer Retry Entire Group 2 more group attempts remaining [Review Topics (References CHCH3 CH=CH2 -СН3 Which of the alkenes above is the least stable (highest in energy)? Which is the most stable (lowest in energy)? _ Submit Answer Retry Entire Group 2 more group attempts remaining eg
1.
2.
3.
H3C CH2CH3 0% CH3 CH2CH(CH32 Hc CH2CH2CH Which of the alkenes above is the least stable (highest in energy)? |--I Which is the most stable (lowest in energy)? Submit Answer Retry Entire Group 4 more group attempts remaining
TRetetences Provide an IUPAC name for each of the compounds shown. (Specify (EY(Z) stereochemistry, if relevant for straight chain alkenes only. Pay attention to commas, dashes, etc.) CH2CH3 CH₃ CH2CH3 CH3CH2CH2 c= H3CH2CH2CH Submit Answer Try Another Version 10 item attempts remaining ipt Draw the structure of (E)-2,3,5-trimethyl-3-hexene. 1 pt 1pt . Consider E/Z stereochemistry of alkenes. • You do not have to explicitly draw H atoms. 1pt 1 pt co-TY,000- Submit Answer T ry Another W on 10 men...
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV a) I b) II c) III d) IV e) V
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV...
(References) Provide an IUPAC name for each of the compounds shown. (Specify (E) (Z) stereochemistry, if relevant for straight chain alkenes only. Pay attention to commas, dashes, etc.) CIH,C CHCI C=C н H CH(CH3)2 H2C сна Submit Relry Entire Group 7 more group attempts remaining Provide an IUPAC name for each of the compounds shown (Specify (E) (Z) stereochemistry, if relevant, for straight chain alkenes only. Pay attention to commas, dashes, etc.) нс сн; C=C H3C-CH HC-CH3 сна CH3 CH3...
For the gas phase isomerization of isopropenyl allyl ether, CH2=C(CH3)-O-CH2CH=CH2– CH3COCH2CH2CH=CH2 the rate constant has been determined at several temperatures. When In k in sis plotted against the reciprocal of the Kelvin temperature, the resulting linear plot has a slope of -1.48x104 K and a y-intercept of 26.0. The activation energy for the gas phase isomerization of isopropenyl allyl ether is kJ/mol. Submit Answer Retry Entire Group 8 more group attempts remaining For the gas phase decomposition of isobutyl bromide,...
please help!
[References] [Review Topics) Use the References to access important values if needed for this question 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...
The chemical environment of protons can be deduced from their chemical shifts. What are the relat that are highly shielded have low delta (chemical shift) values.] 1) 0 The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is 2) The proton with the lowest delta value (the most shielded) is The proton with the highest delta value (the most deshielded) is Submit Answer Retry Entire Group 6 more...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе most stable least stable (a) I (b) I (c) I ll (d) 7) Order the following C-H bonds from strongest to weakest. strongest weakest (a) (b) (c) II (d) 8) Which of the following is represents the lowest energy transition state for the addition of BH, to 2-methyl-1-propene? quCH «сHs нСи Нас (b) (a) Нив--н H H...
H3 C H2Br Br2, H30* HC X CH3 HzC CH3 H3C CH3 Aldehydes and ketones can be halogenated at their a-position by reaction with Cl, Br, or 12, under acidic conditions. Using Br2 under acidic conditions, an intermediate enol is formed which adds bromine at the a-position. The reaction stops after the addition of one bromine because the electron-withdrawing halogen decreases the basicity of the carbonyl oxygen, making the protonation less favorable. Not started curved arrows to show the movement...
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