A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation).B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic).(Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in thelargest.)CH31.A.Electrons in a cyclic conjugated system.B.The compound is (a, aa, or na)2.A.Electrons in a cyclic conjugated system.B.The compound is (a, aa, or na)

Step 1:Aromaticity: Aromaticity refers to a property exhibited by certain cyclic molecules.…

Answered: A. Determine the number of electrons in…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter18: Aromaticity

Section: Chapter Questions

Problem 7CTQ

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2. A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) CH3 a. b. C. d. e. f. i. g. h. :0: IZ :O: N: 3. Specify the number of isomers possible for the following molecules. a. Dichloronitrobenzene? b. An aromatic compound with formula C,H,Cl C. Tribromobenzoic acid
1. Label the following rings as aromatic, anti-aromatic, or non-aromatic. Briefly indicate your reasoning for any molecules that are not aromatic. 2. label the hybridization at every non-metallic heteroatom. Н BrMg HN H2N. N. 'N' B. `H. Н N'
3. Consider the compounds below and determine if they are aromatic, antiaromatic, or non-aromatic. In case of aromatic or anti-aromatic, please indicate number of I electrons in the respective systems. (Hint: 1. Not all lone pair electrons were explicitly drawn and you should be able to tell that the bonding electrons and lone pair electrons should reside in which hybridized atomic orbital 2. You should consider ring strain- flexibility and steric repulsion that facilitates adoption of aromaticity or avoidance of anti- aromaticity) H H N N: NH2 N Aromaticity (Circle) Aromatic Aromatic Aromatic Aromatic Aromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic aromatic TT electrons Me H Me Aromaticity (Circle) Aromatic Aromatic Aromatic Aromatic Aromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic aromatic πT electrons H HH…
In the first blank, label the molecule as either aromatic, antiaromatic, or nonaromatic. In the second, provide the number of pi electrons that would be used. Place a zero in the second blank if non aromatic.
[Review Topics] For each of the species below, identify any cyclic conjugated system, then: A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) 1. A.Electrons in a cyclic conjugated system. B.The compound is (a, aa, or na) 2. A.Electrons in a cyclic conjugated system. B.The compound is (a, aa, or na) Submit Answer Retry Entire Group Show Hint [References] 7 more group attempts remaining
13.
1. Is the molecule below aromatic? If so, circle the atoms that are part of the aromaticity. Also indicate the orbital that each lone pair occupies. .N. H2N
2. Find aromatic, antiaromatic and non-aromatic species among the following. Draw an energy diagram of the following species, where the species should be on the x-axis and energy will be on the y-axis.
what statement is correct about the two molecules?
Question 1: Aromaticity a. Draw a fully labelled MO energy diagram for each (match clearly). b. Determine criteria for the following molecules that aligns with the criteria for aromaticity. I will NOT accept anything outside the list done in class – NOTHING YOU HEARD FROM SOMEONE OTHER THAN ME, READ OR SAW ONLINE. List clearly for each molecule the way we did in class. c. Determine if the molecule are aromatic or antiaromatic based on your list. d. Of the two molecules, which would be most reactive in an electrophilic addition? Why?
1. Draw an aromatic ring, which contains only hydrogens and 5 carbons; add charges and lonepairs if needed 2. Draw a non-aromatic ring which contains only hydrogen and 5 carbons and have conjugateddouble bonds; add charges and lone pairs if needed.
4. Which of the following species are aromatic or anti-aromatic (assuming n-systems are fully planar)? Circle those that are aromatic Put an X through those that are anti-aromatic Do nothing to the structure otherwise 5. Which of the following compounds will have the larger Amax ? Briefly explain in terms of MO theory and photon energy & basic wave property equations. 6. For the allyl anion below, A) Draw the second resonance structure and show the arrow-pushing needed to get to that structure. B) Draw the Valence Bond Theory Orbital Overlap Diagram of the resonance hybrid C) Make an Aufbau diagram of the relative energies of the n molecular orbitals, distribute the electrons of the p orbitals to the MO's, and label the MO's as r, mb, and ri (molecular orbital theory) D) Sketch the shapes of the 3 molecular orbitals in part C.

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