The two different analogies for the concept of resonance have to be compared and the more appropriate analogy has to be identified. Concept Introduction: Resonance Resonance is the phenomenon of delocalization of electrons of pi bond (either pi bonding or non-bonding or both) in a molecule such the molecule cannot be represented by a single Lewis structure as the delocalization of electrons gives rise to more than one structure to a same molecule. Resonance structures The various structures for a molecule that are formed by delocalization of electrons are termed as resonance structures. Rules for writing resonance structures All the resonance structures must have valid and appropriate Lewis structures. The resonance structure are written and drawn such a way that position of atomic nuclei must not be changed. Hybridization of atoms in the molecule must not be changed. The position of bond (electrons) also known as distribution of electrons only must be changed. All of the atoms involved in resonance and also the atoms that are directly bonded to those atoms must be coplanar (lie in same plane) nearly.
The two different analogies for the concept of resonance have to be compared and the more appropriate analogy has to be identified. Concept Introduction: Resonance Resonance is the phenomenon of delocalization of electrons of pi bond (either pi bonding or non-bonding or both) in a molecule such the molecule cannot be represented by a single Lewis structure as the delocalization of electrons gives rise to more than one structure to a same molecule. Resonance structures The various structures for a molecule that are formed by delocalization of electrons are termed as resonance structures. Rules for writing resonance structures All the resonance structures must have valid and appropriate Lewis structures. The resonance structure are written and drawn such a way that position of atomic nuclei must not be changed. Hybridization of atoms in the molecule must not be changed. The position of bond (electrons) also known as distribution of electrons only must be changed. All of the atoms involved in resonance and also the atoms that are directly bonded to those atoms must be coplanar (lie in same plane) nearly.
Solution Summary: The author compares the concept of resonance to that of rhinoceros, which is a hybrid animal of horse and donkey.
The two different analogies for the concept of resonance have to be compared and the more appropriate analogy has to be identified.
Concept Introduction:
Resonance
Resonance is the phenomenon of delocalization of electrons of pi bond (either pi bonding or non-bonding or both) in a molecule such the molecule cannot be represented by a single Lewis structure as the delocalization of electrons gives rise to more than one structure to a same molecule.
Resonance structures
The various structures for a molecule that are formed by delocalization of electrons are termed as resonance structures.
Rules for writing resonance structures
All the resonance structures must have valid and appropriate Lewis structures.
The resonance structure are written and drawn such a way that position of atomic nuclei must not be changed.
Hybridization of atoms in the molecule must not be changed.
The position of bond (electrons) also known as distribution of electrons only must be changed.
All of the atoms involved in resonance and also the atoms that are directly bonded to those atoms must be coplanar (lie in same plane) nearly.
How many signals do you expect in the H NMR spectrum for this molecule?
Br
Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red.
Note for advanced students: In this question, any multiplet is counted as one signal.
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in top
molecule
For the molecule in the bottom drawing area, highlight in red any other H atoms that will
contribute to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in bottom
molecule
In the drawing area below, draw the major products of this organic reaction:
1. NaOH
?
2. CH3Br
If there are no major products, because nothing much will happen to the reactant under these reaction conditions, check the box under the drawing area
instead.
No reaction.
Click and drag to start drawing a
structure.
☐ : A
ค
Predict the major products of the following organic reaction:
NC
Δ
?
Some important Notes:
• Draw the major product, or products, of the reaction in the drawing area below.
• If there aren't any products, because no reaction will take place, check the box below the drawing area instead.
• Be sure to draw bonds carefully to show important geometric relationships between substituents.
Note: if your answer contains a complicated ring structure, you must use one of the molecular fragment stamps (available in the menu at right) to enter the
ring structure. You can add any substituents using the pencil tool in the usual way.
Click and drag to start drawing a
structure.
Х
а
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