Concept explainers
Interpretation: The set of resonance for following anion should be determined.
Concept introduction: Lewis structure is a representation of molecules in which dots are shown to represent unshared electrons and lines are shown to represent bonds. These lines and dots represent distribution of electrons in the molecule.
When one single structure is unable to describe all the properties of a 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 the resonance structure of anions in the movement of negative charge.
2. Use only arrow type 3 to move a positive charge for the resonance structure of cations.
3. The sigma bond should not be broken. Any atom must not move from its place and total number of electrons must be the same in all resonance structures.
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Organic Chemistry: A Guided Inquiry
- The 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_forwardWhich elements on the periodic table (other than H) are likely to form a+1 cation?arrow_forwardDraw additional resonance structures for attached ion.arrow_forward
- Draw additional resonance structures for attached ion.arrow_forward16. Which of the following structures is the CORRECT resonance structure of the following. molecule: (A) (B) (C) (D) CH3- CH₂ CH3 -H CH₂CH3 CH₂CH-CH₂ CH3 CH3arrow_forwardBy drawing the Lewis structure of the cyanide anion, interpret which atom the active tip is on (which atom it reacts on in a reaction) according to MOT?arrow_forward
- Three major contributing resonance structures are possible for the following cation. One is given below. Draw the remaining structures (in any order), including nonbonding electrons and formal charges. Omit curved arrows. н н CH3З Which contributes most to the hybrid? The structure with the positive charge on sulfur. All contribute equally. O The structures with the positive charge on carbon.arrow_forward11) Which resonance structure is of a compound different than the others? dora a) و کا b) d) CH₂ NHarrow_forwardWhy does the bond dipole point towards the more electronegative atom? Why does it accumulate a partial negative charge?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning