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Concept explainers
Interpretation: The important resonances of molecules mentioned below should be drawn.
Concept introduction:When one single structure is unable to describe all the properties of single molecule, a phenomenon called resonance comes into play. This arises when two or more than two Lewis structures are possible for one molecule. All such structures are called resonating structures and have same placement of atoms in them but these have different locations of bond pairs and lone pairs. The resonating structures are inter-convertible with each other. The resultant of all the resonating or contributing structures is called the resonance hybrid.
Rules to form resonance structure are as follows:
1. Use arrow types 1 and 2 for resonance structure of anions in movement of negative charge. Arrow type 1 shows the movement of lone pair toward adjacent atom and then converted into
2. Use only arrow type 3 to move a positive charge for resonance structure of cations. Arrow type 3 is used to move
3. The sigma bond should not be broken. Any atom must not move from its place and total number of electrons must be same in all resonance structures.
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Chapter 5 Solutions
Organic Chemistry: A Guided Inquiry
- Draw all reasonable resonance structures for the following species. :0: draw structure . draw structure . negative charge on carbon negative charge on oxygenarrow_forwardIf a compound has two negatively charged resonance structures, a MINOR resonance contributor would be the one with a negative charge on the less electronegative atom true or falsearrow_forwardThe C=O double bond is called a “carbonyl bond.” Acetone and othercarbonyl compounds are introduced in some texts along with this structure a. Is this an important resonance structure of acetone? Explain. b. Does this structure convey any useful information about acetone? If so, what?arrow_forward
- Which elements on the periodic table (other than H) are likely to form a+1 cation?arrow_forwardplease draw it out and explain how to do it. i would like to learnarrow_forwardWhich of the following shows correct arrow placement that represents significant resonance for the given molecule? None of the choices given represent significant resonance. Save for Laterarrow_forward
- Please determine whether the following compounds are aromatic or anti-aromatic. S H N H · N NH₂ Narrow_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_forwardDraw important resonance contributing structures.arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
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