Haloethanes ( CH 3 CH 2 X, X = Cl, Br, I ) have similar barriers to rotation ( 13 .4-15 .5 kJ/mol ) despite the fact that the size of the halogen increases, Cl → Br → I . Offer an explanation.
Haloethanes ( CH 3 CH 2 X, X = Cl, Br, I ) have similar barriers to rotation ( 13 .4-15 .5 kJ/mol ) despite the fact that the size of the halogen increases, Cl → Br → I . Offer an explanation.
Solution Summary: The author explains that all haloethanes have the same barrier to rotation because the free rotation around a single bond between carbon and
Haloethanes
(
CH
3
CH
2
X, X
=
Cl, Br, I
)
have similar barriers to rotation
(
13
.4-15
.5 kJ/mol
)
despite the fact that the size of the halogen increases,
Cl
→
Br
→
I
. Offer an explanation.
Which of the following has an improper axis of rotation, Sn (n > 2)?
a. ammonia
b. iodomethane
c. ammonium ion
d. none of the above has an improper axis of rotation
e. Sulfur chloropentafluoride, SF5Cl
f. hydrogen peroxide
which of the following would have free rotation around the two carbon atoms?
i. acetylene, HCCH
ii. ethene, H2CCH2
iii. ethene, H3CCH3
Section 7.3 shows that the compound 2-butene exists intwo isomeric forms, which can be interconverted only bybreaking a bond (in that case, the central double bond).How many possible isomers correspond to each of the following chemical formulas? Remember that a simple rotation of an entire molecule does not give a different isomer.Each molecule contains a central CuC bond.(a) C2H2Br2(b) C2H2BrCl(c) C2HBrClF
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