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Concept explainers
(a)
Interpretation:
A structural formula for anisole should be drawn showing positions of multiple bonds and lone pairs.
Concept introduction:
The strategy for identifying multiple bonds and lone pairs in an organic molecule is to look at each atom of the structure, what is needed to complete their octet and a bond or a lone pair, (except hydrogen) should be determined. Elements in the different groups of the periodic table can form a different number of bonds.
(b)
Interpretation:
Using curved arrows, the method of converting between the original structure and two additional resonance structures should be shown.
Concept introduction:
Resonance structures are two or more electron-dot structures that describe the electronic bonding of a particular molecule. Resonance structures can be used to indicate the delocalized electrons which cannot be shown by a single electron-dot structure. The average of all resonance structures is called resonance hybrid.
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Chapter 7 Solutions
CHEMISTRY-W/MASTERING CHEMISTRY ACCESS
- (a) Determine the formal charge of oxygen in the following structure. If the atom is formally neutral, indicate a charge of zero. (b) Draw an alternative Lewis (resonance) structure for the compound given in part (a). Show the unshared pairs and nonzero formal charges in your structure. Don't use radicals. Formal charge on O 0arrow_forwardDraw a Lewis Structure for each of the following species and assign formal charge where appropriate. Using electronegative values from the period table that was provided identify polar covalent bonds and label the atoms δ+ and δ−. For each of the molecules indicate whether or not it has a dipole moment. (a)CH5N (b) HCN (c) H2CO (d) CH3NC(e) CH3SOCH3 (f) H6BNarrow_forwardThe partial Lewis structure that follows is for a hydrocarbonmolecule. In the full Lewis structure, each carbon atomsatisfies the octet rule, and there are no unshared electronpairs in the molecule. The carbon—carbon bondsare labeled 1, 2, and 3. (a) How many hydrogen atomsare in the molecule? (b) Rank the carbon–carbonbonds in order of increasing bond length. (c) Whichcarbon—carbon bond is the strongest one?arrow_forward
- The partial Lewis structure that follows is for a hydrocarbonmolecule. In the full Lewis structure, each carbon atomsatisfies the octet rule, and there are no unshared electronpairs in the molecule. The carbon—carbon bondsare labeled 1, 2, and 3. (a) How many hydrogen atomsare in the molecule? (b) Rank the carbon–carbonbonds in order of increasing bond length. (c) Whichcarbon—carbon bond is the strongest one? [Sections 8.3and 8.8]arrow_forwardHelp me pleasearrow_forwardConsider Lewis formulas A, B, and C:(a) Are A, B, and C constitutional isomers, or are they resonance contributors? (b) Which have a negatively charged carbon? (c) Which have a positively charged carbon? (d) Which have a positively charged nitrogen? (e) Which have a negatively charged nitrogen? (f) What is the net charge on each? (g) Which is a more stable structure, A or B? Why? (h) Which is a more stable structure, B or C? Why? (i) What is the CNN geometry in each according to VSEPR?arrow_forward
- Consider compounds A–D, which contain both a heteroatom and a double bond. (a) For which compounds are no additional Lewis structures possible? (b) When two or more Lewis structures can be drawn, draw all additional resonance structures.arrow_forwardFor each of the following covalent bonds: (a) use the symbols δ+ and δ- to indicate the direction of polarity (if any).(a) C-F; (b) N-Br; (c) B-C; (d) Si-H(b) Rank the following covalent bonds in order of increasing polarity. (i) C-H, O-H, N-H; (ii) C-N, C-O, B-O; (iii) C-P, C-S, C-Narrow_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_forward
- Using just a periodic table (not a table of electronegativities), decide which of these is likely to be the most polar bond. Explain your answer! (a) C-F (b) S-F (c) Si-F (d) O-Farrow_forwardFormic acid has the chemical formula HCOOH. It is a colorlessliquid that has a density of 1.220 g/mL. (a) The carbonatom in formic acid is bound to one H and both O’s. Drawthe Lewis structure for formic acid, showing resonance ifpresent. (b) Formic acid can react with NaOH in aqueoussolution to produce the formate ion, HCOO-. Write thebalanced chemical equation for this reaction. (c) Draw theLewis structure of the formate ion, showing resonance ifpresent. (d) How many milliliters of a 0.100 M solution ofNaOH would it take to completely react with 0.785 mL offormic acid?arrow_forwardThe connectivity of carbon oxysulfide is OCS. (a) Write a Lewis formula for carbon oxysulfide that satisfies the octet rule. (b) What is the molecular geometry according to VSEPR? (c) Does carbon oxysulfide have a dipole moment? If so, what is its direction?arrow_forward
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