Concept explainers
Interpretation: The important resonances of below molecules 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.
2. Use only arrow type 3 to move a positive charge for 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 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_forwardIn the following Lewis structure of [BrO3]", every atom, bond and lone pair is positioned. To complete the structure, drag the formal charge tags to the appropriate atom(s). Each marker may be used more than once, or not at all. If an atom has a formal charge of zero, do not drag a tag to it. When you drag the marker in, place the little crosshairs in the upper left corner of the marker directly over the atom(s) in question (not above them). Ö: Br: 2+ 2-arrow_forwardCould you draw all valid resonance structrues for these two? I understand the rules for drawing resonance structures but I miss a lot of them.arrow_forward
- 3. Which of the following molecules are conjugated? For those which are conjugated, write a resonance structure.arrow_forward3. The following shows all resonance structures for the following molecule. a. Draw in all implied lone pairs. b. Draw in curved arrows that show the flow of electrons, making sure the arrows show the precise starting point and destination of the electrons. Label each arrow as: lp →→→л (p=lone pair) c. d. Rank the resonance structures from most stable to least based on the number of formal charges and atoms that lack an octet of electrons. ol-of-o. B A D d-d-d-o E C F Garrow_forwardTHE COMPLETE QUESTION IS HEREarrow_forward
- Which of the following species is a valid resonance structure of A? Use curved arrows to show how A is converted to any valid resonance structure. When a compound is not a valid resonance structure of A, explain why not.arrow_forwardI got this marked wrong on an assignment, but I'm not sure why. Please help me find the correct resonance structure.arrow_forwardGive handwritten answerarrow_forward
- O REPRESENTATIONS OF ORGANIC MOLECULES Ranking resonance structures Rank the resonance structures in each row of the table from major to minor. For example, in the first row, select (major) for the major resonance contributor. If two or more structures in the same row contribute equally, rank them equally by selecting the same number. H. H H. H. H. H. H. H. (Rank) (Rank) (Rank) H. H. H. H. H. H. H. (Rank) (Rank) :o: Rank) (Rank) 74°F DELL F5 F6 F7 F8 F9 F10 F11 PrtScr F12 24arrow_forwardFor the given compound, draw all significant resonance forms and rank them from most significant to least significant. Briefly explain the rankings. Part 1 Let's begin by considering which resonance patterns are present. First, add curved arrow(s) to show the resonance using the following pattern: a pi bond between two atoms of differing electronegativity. Modify the second structure given to draw the new resonance structure. Include relevant formal charges in your structure. Use the + and - tools to add/remove charges to an atom, and use the single bond tool to add/remove double bonds. H₂C CH₂ H₂C Edit Drawing CH₂ SUPPORTarrow_forwardHow many resonance structures of 103 can be drawn? (assuming no triple bonds are used in the resonance structures) Hint: count all possible structures. There are more than 7 resonance structuresarrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning