Homework Answers
Resonance: The representation of some molecules can be done through several Lewis structures. These different structures of the same molecule are known as contributing structures. A hybrid of the contributing structures represents the real structure of the molecule and is known as resonance hybrid.
Such molecules having different Lewis structures exhibit resonance. Resonance occurs through the delocalization of lone pairs over various atoms within the molecule.
Resonance is shown when the following conditions are satisfied:
• When two double bonds are separated by a single bond.
• When a double bond is separated by a lone pair through single bond.
Features of resonance:
• Each contributing structure showing resonance has the same bonding and non-bonding electrons.
• Resonance involves the movement of electrons and not the atoms.
• A double headed arrow is used to represent different contributing structures.
• The contributing structures having negative charge on more electronegative atom is more stable.
• The contributing structures that have opposite formal charges on adjacent atoms are more stable.
Write the given structure and mark the peptide bond as shown below:
Make the required resonating structure by moving electrons from nitrogen towards carbon and from carbon towards the doubly bonded oxygen atom as shown below:
The resonance structure for the peptide bond is as follows:
Draw the structure of the peptide Arg-Met-His-Val-Glu, label the coplanar atoms in one peptide bond and...
Draw the structure of the peptide Arg-Met-His-Val-Glu, label the coplanar atoms in one peptide bond and estimate a pI.
Draw the resonance Structure of the following Substance. Part A Draw the resonance structure of the...
Draw the resonance Structure of the following
Substance.
Part A Draw the resonance structure of the following substance. Interactive 3D display mode CH H3C Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including charges where needed. The single bond is active by default,
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: a) Peptide bond...
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the
following:
a) Peptide bond
b) N-terminus
c) C-terminus
d) An α-amino group and an ε-amino group
e) An α-carboxylate group and a Y-carboxylate group
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: (a). peptide bond, (b). N-terminus, (c). C-terminus, (d). an a-amino group and an e-amino group, (e), an α-carboxylate group and a -carboxylate group.
1. What are the resonance structures of the peptide bond? How does the peptide bond contribute...
1. What are the resonance structures of the peptide bond? How does the peptide bond contribute to protein stability? nov sver visuell duel nen o dos bem nodonul bosono 2. A pancreatic enzyme has an Ala residue mutated to lle, and upon doing so, activity is lost. Mutating the lle to Gly restores activity. Why? enitong gulanab ni sikens sidem nos lo 22000 art b . List some of the differences between a-helices and B-sheets.
In the following structure, consider the amide group- highlighted green- which contains a peptide bond: In...
In the following structure,
consider the amide group- highlighted green- which contains a
peptide bond:
In the structure below, convert the peptide bond-containing
amide group into an analog that could be a likely transitionstate
analog. Include hydrogen atoms on non-carbon atoms.
Hint: Modify the given structure to generate your response.
Correct answers conatin a single-chain "peptide", do not divide the
structure into fragments. Consider an analog with a reduced group
or a carbon atom replacing the nitrogen atom. Do not...
Draw the Lewis structure of fulminate ion. Encircle the most important resonance structure aka resonance structure...
Draw the Lewis structure of fulminate ion. Encircle the most important resonance structure aka resonance structure with highest contribution What is the hybridization for all the atoms in the most stable resonance? Draw the Valence Bond theory orbital overlaps for the ion Which site/atom is electrophilic? Which atom is nucleophilic? What is the point group of the ion?
Draw a second resonance from for the structure shown below. Draw a second resonance form for...
Draw a second resonance from for the structure shown below.
Draw a second resonance form for the structure shown below. CH3 I • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one. • Should you want to restart the exercise, the drop-down menu labeled == starting points == can be used to redraw the starting molecule on the sketcher. • In your structure, all second row elements should...
5. For each structure below, draw the best additional resonance structures. The mmber of additional resonance...
5. For each structure below, draw the best additional resonance structures. The mmber of additional resonance structures that you need to draw are indicated by the number of resonance arrows in each bracket for a given structure. It would be helpful to show my missing lone electrod pairs Don forget to include formal charge where applicable. (2pts for each correct resonance structure) Don't Completely understand the Resonance structure.
- Part A Choose the resonance contributors of the peptide bond in the less stable configuration...
- Part A Choose the resonance contributors of the peptide bond in the less stable configuration Check all that apply. CH CH Н Submit Request Answer
Problem 21.27 Choose the resonance contributors of the peptide bond in the less stable configuration Check...
Problem 21.27 Choose the resonance contributors of the peptide bond in the less stable configuration Check all that apply.
Draw the resonance Structure of the following
Substance.
Part A Draw the resonance structure of the following substance. Interactive 3D display mode CH H3C Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including charges where needed. The single bond is active by default,
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the
following:
a) Peptide bond
b) N-terminus
c) C-terminus
d) An α-amino group and an ε-amino group
e) An α-carboxylate group and a Y-carboxylate group
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: (a). peptide bond, (b). N-terminus, (c). C-terminus, (d). an a-amino group and an e-amino group, (e), an α-carboxylate group and a -carboxylate group.
1. What are the resonance structures of the peptide bond? How does the peptide bond contribute to protein stability? nov sver visuell duel nen o dos bem nodonul bosono 2. A pancreatic enzyme has an Ala residue mutated to lle, and upon doing so, activity is lost. Mutating the lle to Gly restores activity. Why? enitong gulanab ni sikens sidem nos lo 22000 art b . List some of the differences between a-helices and B-sheets.
In the following structure,
consider the amide group- highlighted green- which contains a
peptide bond:
In the structure below, convert the peptide bond-containing
amide group into an analog that could be a likely transitionstate
analog. Include hydrogen atoms on non-carbon atoms.
Hint: Modify the given structure to generate your response.
Correct answers conatin a single-chain "peptide", do not divide the
structure into fragments. Consider an analog with a reduced group
or a carbon atom replacing the nitrogen atom. Do not...
Draw a second resonance from for the structure shown below.
Draw a second resonance form for the structure shown below. CH3 I • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one. • Should you want to restart the exercise, the drop-down menu labeled == starting points == can be used to redraw the starting molecule on the sketcher. • In your structure, all second row elements should...
5. For each structure below, draw the best additional resonance structures. The mmber of additional resonance structures that you need to draw are indicated by the number of resonance arrows in each bracket for a given structure. It would be helpful to show my missing lone electrod pairs Don forget to include formal charge where applicable. (2pts for each correct resonance structure) Don't Completely understand the Resonance structure.
- Part A Choose the resonance contributors of the peptide bond in the less stable configuration Check all that apply. CH CH Н Submit Request Answer
Problem 21.27 Choose the resonance contributors of the peptide bond in the less stable configuration Check all that apply.
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