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Chapter 7: Delocalized Electrons and their Effect on Stability, Reactivity, and p
K
a
- Ultraviolet and Visible Spectroscopy
Exercises
Practice Exercise 3
Practice Exercise 3
This activity contains 6 questions.
Which of the following best defines "delocalized electrons"?
electrons that are shared by more than two atoms
electrons that are shared by two atoms
electrons in a pi bond
lone pair electrons
electrons in nonadjacent sigma bonds
What is the bond order of the C-C bonds in the resonance hybrid of benzene? (Bond order = 1 for single bond, = 2 for double bond, etc.)
1
1.5
2
1 and 2
3
Which two sites in the following compound are most apt to be protonated, C(1)H
3
-C(2)H=C(3)H-O-C(4)H
3
?
C(2) and C(3)
oxygen and C(3)
oxygen and C(2)
oxygen and C(1)
oxygen and C(4)
Which of the following is
not
a true statement?
The more stable the resonance contributor, the more it contributes to the hybrid.
A compound with delocalized electrons is more stable than if all its electrons were localized.
Acetic acid has more resonance energy than does the acetate ion.
Phenol is more acidic than cyclohexanol.
The resonance hybrid is more stable than any of its contributing resonance structures.
What kind of double bonds are in 1,2-dibromo-1,5-hexadiene?
conjugated double bonds
culminated double bonds
cumulated double bonds
isolated double bonds
attached double bonds
What is the major product obtained from the reaction of 1-methyl-1,4-cyclohexadiene with one equivalent of HBr?
4-bromo-1-methylcyclohexene
1-bromo-1-methyl-3-cyclohexene
5-bromo-4-methylcyclohexene
4-bromo-4-methylcyclohexene
4-bromo-5-methylcyclohexene
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