Concept explainers
Interpretation: The possible resonance structures for the given cation and the structure that makes the largest contribution to the resonance hybrid is to be drawn.
Concept introduction: Most of the organic structures cannot be represented using single Lewis structure. Therefore, there exists more than one Lewis structure for representing a molecule or ion. These structures are known as resonance structures. These are the hypothetical structures and do not specify the exact structure. These resonance structure combine together to give resonance hybrid that is lower in energy and is the most stable structure.
The delocalization of electrons results in the formation resonance structure.
The stability of resonance structures depends upon the following rules:
• The stability of resonance structure is more if it possesses more bonds and fewer charges.
• Resonance structure will be more stable if atoms of the resonance structure have complete octet.
• The stability of resonance structure is more if negative charge is on more electronegative atom
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ORGANIC CHEMISTRY
- The two molecules in the pictrue behave very differently in reactions. Though they are both neutral, it is possible to draw resonance structures to illustrate which atoms will have partial charges. In one of the molecules, a carbon of the double bond is partially positive while in the other it is partially negative. 1. Draw one resonance structure for each molecule below with only one positive and one negative charge in the left box. In the box to the right draw out the original structure with its partial charges, which can be determined from the resonance structures.arrow_forwardPlease give the best resonance and second best resonance for SO2. Please explain why the best resonance is the "best" and why the second best resonance is the "second best".arrow_forwardFor each of the following pairs of resonance structures, cirele the one that would make greater contribution to the actual resonance hybrid. OCH, OCH, A- BI E =arrow_forward
- 3. Which of the following molecules are conjugated? For those which are conjugated, write a resonance structure.arrow_forwardDraw all reasonable resonance structures for the following species. :0: draw structure . draw structure . negative charge on carbon negative charge on oxygenarrow_forwardDraw all possible resonance structures for the following cation, and indicate which structure makes the largest contribution to the resonance hybrid.arrow_forward
- Select all compounds which are resonance structures of Compound A. :0: Compound A :0: .. O :0: :OHarrow_forwardFour major contributing resonance structures are possible for the given cation, which is the intermediate o complex of an electrophilic aromatic substitution involving phenol and bromine. Two structures are given but are incomplete. Complete the given structures by adding nonbonding electrons and formal charges. Draw the remaining structures (in any order), including nonbonding electrons and formal charges. Complete structure A. Complete structure B. : 0 H :0- Br : Brarrow_forward16. Draw significant resonance structures for the following compound. Which of this is/are most significant resonance structure(s)? Explain why. (a) مهم (b) the H H- (c)arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning