Aromatic Compounds: Reaction

21 Questions  I  By Ochem_ownsmylife on November 22, 2009
Review the different reactions that are encountered when adding groups to aromatic rings when you can no longer force yourself to do more practice problems!

  

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1.  What is EAS? Why does it occur?
A.
B.
C.
2.  The first step of the EAS reaction mechanism sees an _________ (electrophile/nucleophile) add to the ring in the addition step, which is the ______ step of the reaction. The ________ ion intermediate that is formed reacts _______ (slowly/quickly) with a __________(electrophile/nucleophile), which is a base,  in the _________ (RDS/ elimination) step. Separate answers with a comma.
3.  True or false: An arenium ion is not stabilized by any conjugation.
A.
B.
4.  Halogenation of benzene cannot occur with only the instantaneous dipole of the helogen gas- it requires a catalyst. Which of the following reagents-catalyst combination would be typically used in halogenation of benzene?
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B.
C.
5.  If I2 was used, what catalyst would allow for the best addition to benzene in a halogenation reaction? (Subscripts and superscripts are not supported on some computers for these quizzes- if they are needed type as regular number)A: __________
6.  Freidel Crafts reactions can be useful to add what functional groups to aromatic rings?
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B.
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7.  What catalyst should be used to add ClCH2CH3 to benzene?
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B.
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D.
8.  At its core, a Friedel-Crafts reaction requires a ______ to be produced to allow the addition of an alkly group.
9.  If a long chain alkyl group is to be added to a aromatic ring , a variation of Friedel-Crafts alkylation can be used, called Friedel Crafts _______. This produces an _________ ion intermediate, which stops the problem of ___________, because of _________ in the intermediate.Separate answers with commas.
10.  Match the following Friedel Crafts related reactions and reagents:1. R-C(O)-Cl and AlCl32. CO and HCl and ZnCl23. FC acylation product and HCl and Zn(Hg)4. Aldehyde formation5. Clemenson Reduction6. Friedel Crafts Acylation
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11.  Nitrate and sulfate both add to benzene to produce ____ directors. Which requires the other in a catalytic role?
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D.
12.  The rate of subsequent EAS reactions can be affected by the groups already attached. Activating groups _____ (increase/decrease) the rate of reaction by ______  (donating/withdrawing) electrons to the pi cloud, making it _______ (less/more) nucleophilic and ______ (increase/decrease) the stability of the carbocation intermediate. Deactivating groups _________ (increase/decrease) the rate of a reaction by _______ (donating/withdrawing) electrons from the pi cloud, and ______ (increase/decrease) the stability of the carbocation intermediate.Separate answers with commas.
13.  Which of the following are ortho-para directors?
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14.  Which of the following are meta directors?
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15.  A halide substituent is:
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D.
16.  What group, located para on a phenol, would make the least acidic compound?
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17.  True or false: A better electron donating group makes a better acid.
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B.
18.  Diazonium Salts aer very useful in multistep synthesis. Which of the following groups are only/best added by first making a diazonium salt?
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19.  What reagents are needed to get a diazonium salt from a aniline?Check all that are required.
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20.  What is the name of the following compound?
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21.  What substituent is on anisole?
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