1. (a) Different conformations are found in pentane. (i) Using Newman Projection, draw all the possible...
1. (a) Different conformations are found in pentane.
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(i) Using Newman Projection, draw all the possible staggered and eclipsed conformations of pentane by referring to the bond rotation at C2-C3.
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(ii) Compare their stability and explain your answer.
(b) Draw the most stable form of the chair conformers for trans- and cis-1,4-dimethyl cyclohexane. Comment on their stability.
thanks
Homework Answers
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1. (a) Different conformations are found in pentane.
(i) Using Newman Projection, draw all the possible...
1. Draw the Neman Projection of the following Promane descriptions Newman projection for most stable Newman...
1. Draw the Neman Projection of the following Promane descriptions Newman projection for most stable Newman projection for least stable conformation conformation 2. Draw the Newman projections for butane looking down the C2-C3 bond through a full 360 degree rotation. Start with the anti-staggered Newman projection then draw and label each Newman projection (staggered, eclipsed, gauche, anti-staggered, fully-eclipsed) for every 60 degrees of rotation Newman projection for most stable Newman projection for second-most stable conformation Conformation Newman projection for least...
5. Construct a model of 1,2-difluoroethane. Draw the Newman projections for the staggered and eclipsed conformations...
5. Construct a model of 1,2-difluoroethane. Draw the Newman projections for the staggered and eclipsed conformations of 1,2-difluoroethane. Are these molecules isomers or conformers? If they are isomers to what specific category do they belong? 6. The structure of cyclohexane (C6H12) is based on a six membered ring of carbon atoms. Construct a model of cyclohexane. Cyclohexane can exist in two conformations; the boat or chair conformation (shown below). What are the C-C-C, C-C-H, and H-C-H bond angles at each...
Using the Newman projection, draw a staggered conformer and an eclipsed conformer for 1-chloropropane, Cl -...
Using the Newman projection, draw a staggered conformer and an eclipsed conformer for 1-chloropropane, Cl - CH_2 - CH_2 - CH_3, along with the bond indicated by (*). Why can these conformers be interconverted? What structural feature prevents the conversion of cis-2-butene into trans-2-butene by a simple rotation?
Draw the following conformations I) Conformations - Draw the following conformations of each molecule. a) Newman...
Draw the following conformations
I) Conformations - Draw the following conformations of each molecule. a) Newman projection along the C1-C2 bond; a circle is provided for you. Circle all the terms that correctly describe that conformation. P.. H OH Circle ALL that apply: H anti gauche HH eclipsed staggered b) Newman projection along the C2-C bond; a circle is provided for you. Circle all the terms that correctly describe that conformation. Circle ALL that apply: HH anti gauche - OH...
2.16. Using a Newman projection, draw a staggered and eclipsed 2.17. For alkanes containing four or...
2.16. Using a Newman projection, draw a staggered and eclipsed 2.17. For alkanes containing four or more carbons, use the Newman projection to draw 2.18. Describe what contributes to the changes in the potential energy of an alkane as you on of an alkane. (Section 4.7) the gauche and anti conformations. (Section 4.8) rotate around a carbon-carbon bond. (Section 4.7 & 4.8) energy conformations. (Section 4.7 &4.8) carbon bond. (Section 4.7 & 4.8) 2.19. Use a sawhorse projection or Newman...
Conformations of Alkanes and Cycloalkanes 1) Draw a Newman projection of the anni conformation of 1.2-dichloroethane...
Conformations of Alkanes and Cycloalkanes 1) Draw a Newman projection of the anni conformation of 1.2-dichloroethane che conformation of 1.2-dichloroethane 2) Draw a Newman projection of the 5) Sight along the C2-C3 bond of 2-methylbutane and draw each of the staggered conformations 4) Arrange the following conformations from lowest to highest energy. CH CH 5) Circle the Most stable conformation of the molecule shown below. н сн, YI 6) Circle the Most stable conformation of the molecule shown below.
13) Draw the Newman projection of all of the staggered conformations of 1-bromo-2-chloroethe and circle the...
13) Draw the Newman projection of all of the staggered conformations of 1-bromo-2-chloroethe and circle the most stable structure(s). Label all of the structures as to whether the bromine chlorine interaction is gauche or anti. 14) Draw the two chair conformations of cis-4-tert-butylcyclohexanol, Circle the one that is the most stable. 15) How many chirality centers are in the following molecule? Mark them all with an asterisk. он он WOH он он 16) What is the relationship between the following...
16. Draw the Newman projection (viewing down the C3-C4 bond) for the two staggered conformations of...
16. Draw the Newman projection (viewing down the C3-C4 bond) for the two staggered conformations of hexane that have different energies. Indicate the conformation with the lowest energy. (5 pts) 17. Consider the molecule below. (10 pts) CZ Bry Br CI a) Is this molecule chiral? Provide an explanation. b) Draw both chair configurations for this molecule, and circle the more stable conformation (if applicable).
Numbers 2-4 & Thhe other 1 & 2 (Straight Chain Angle). Cylic Angle 1.Propane. 109.5. -...
Numbers 2-4 & Thhe other 1 & 2
(Straight Chain Angle). Cylic Angle
1.Propane. 109.5. -
Butane. 109.5. 90
Pentane 109.5. 108
2. Newman projections: Draw the Newman projections of all of
the different energy levels and label them as staggered or eclipsed
in order from lowest energy to highest.
3. Cyclohexane: Draw both the chair and boat conformation of
1,4-dimethylcyclohexane with the methyl groups as cis and trans for
both conformations. Label your molecules for cis and trans. Tell...
. Using the following compound answer the following questions. (30 points) a. Draw Newman projections for...
. Using the following compound answer the following questions. (30 points) a. Draw Newman projections for all the possible conformational isomers for 2,3-dibromo-pentane rotation along the axes of C2-C3. b. Label the different Newman projections. (hint: anti, eclipsed, or stagger, etc). c. Rank the conformations in order from most stable (1) to least stable. d. Base on your answer on part c take the most stable isomer and one least stable isomer and Explain in details why the difference in...
1. Draw the Neman Projection of the following Promane descriptions Newman projection for most stable Newman projection for least stable conformation conformation 2. Draw the Newman projections for butane looking down the C2-C3 bond through a full 360 degree rotation. Start with the anti-staggered Newman projection then draw and label each Newman projection (staggered, eclipsed, gauche, anti-staggered, fully-eclipsed) for every 60 degrees of rotation Newman projection for most stable Newman projection for second-most stable conformation Conformation Newman projection for least...
5. Construct a model of 1,2-difluoroethane. Draw the Newman projections for the staggered and eclipsed conformations of 1,2-difluoroethane. Are these molecules isomers or conformers? If they are isomers to what specific category do they belong? 6. The structure of cyclohexane (C6H12) is based on a six membered ring of carbon atoms. Construct a model of cyclohexane. Cyclohexane can exist in two conformations; the boat or chair conformation (shown below). What are the C-C-C, C-C-H, and H-C-H bond angles at each...
Using the Newman projection, draw a staggered conformer and an eclipsed conformer for 1-chloropropane, Cl - CH_2 - CH_2 - CH_3, along with the bond indicated by (*). Why can these conformers be interconverted? What structural feature prevents the conversion of cis-2-butene into trans-2-butene by a simple rotation?
Draw the following conformations
I) Conformations - Draw the following conformations of each molecule. a) Newman projection along the C1-C2 bond; a circle is provided for you. Circle all the terms that correctly describe that conformation. P.. H OH Circle ALL that apply: H anti gauche HH eclipsed staggered b) Newman projection along the C2-C bond; a circle is provided for you. Circle all the terms that correctly describe that conformation. Circle ALL that apply: HH anti gauche - OH...
2.16. Using a Newman projection, draw a staggered and eclipsed 2.17. For alkanes containing four or more carbons, use the Newman projection to draw 2.18. Describe what contributes to the changes in the potential energy of an alkane as you on of an alkane. (Section 4.7) the gauche and anti conformations. (Section 4.8) rotate around a carbon-carbon bond. (Section 4.7 & 4.8) energy conformations. (Section 4.7 &4.8) carbon bond. (Section 4.7 & 4.8) 2.19. Use a sawhorse projection or Newman...
Conformations of Alkanes and Cycloalkanes 1) Draw a Newman projection of the anni conformation of 1.2-dichloroethane che conformation of 1.2-dichloroethane 2) Draw a Newman projection of the 5) Sight along the C2-C3 bond of 2-methylbutane and draw each of the staggered conformations 4) Arrange the following conformations from lowest to highest energy. CH CH 5) Circle the Most stable conformation of the molecule shown below. н сн, YI 6) Circle the Most stable conformation of the molecule shown below.
13) Draw the Newman projection of all of the staggered conformations of 1-bromo-2-chloroethe and circle the most stable structure(s). Label all of the structures as to whether the bromine chlorine interaction is gauche or anti. 14) Draw the two chair conformations of cis-4-tert-butylcyclohexanol, Circle the one that is the most stable. 15) How many chirality centers are in the following molecule? Mark them all with an asterisk. он он WOH он он 16) What is the relationship between the following...
16. Draw the Newman projection (viewing down the C3-C4 bond) for the two staggered conformations of hexane that have different energies. Indicate the conformation with the lowest energy. (5 pts) 17. Consider the molecule below. (10 pts) CZ Bry Br CI a) Is this molecule chiral? Provide an explanation. b) Draw both chair configurations for this molecule, and circle the more stable conformation (if applicable).
Numbers 2-4 & Thhe other 1 & 2
(Straight Chain Angle). Cylic Angle
1.Propane. 109.5. -
Butane. 109.5. 90
Pentane 109.5. 108
2. Newman projections: Draw the Newman projections of all of
the different energy levels and label them as staggered or eclipsed
in order from lowest energy to highest.
3. Cyclohexane: Draw both the chair and boat conformation of
1,4-dimethylcyclohexane with the methyl groups as cis and trans for
both conformations. Label your molecules for cis and trans. Tell...
. Using the following compound answer the following questions. (30 points) a. Draw Newman projections for all the possible conformational isomers for 2,3-dibromo-pentane rotation along the axes of C2-C3. b. Label the different Newman projections. (hint: anti, eclipsed, or stagger, etc). c. Rank the conformations in order from most stable (1) to least stable. d. Base on your answer on part c take the most stable isomer and one least stable isomer and Explain in details why the difference in...
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