Chemistry: Concepts and Applications

 
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Teachers Notes:
Characterizing a hydrocarbon

Problem 1:
a. C₃H₈ → C₃H₆ + H₂
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617987/179001/ch22_5.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (7.0K)</a> → <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617987/179001/ch22_6.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (7.0K)</a> + H-H

b. C₇H₁₆ → C₃H₈ + C₄H₈

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c. C₁₀H₂₂ → C₅H₁₂ + C₅H₁₀

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Problem 2:
1. Location of the double bond is one possible isomer. These could include 1-dodecene, 2-dodecene, 3-dodecene, 4-dodecene, 5-dodecene, and 6-dodecene.

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(Hydrogen omitted to simplify the drawing)

2. Branched compounds are a second type of isomer.

3,4 dimethyl, 2-decene       <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617987/179001/ch22_14.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (6.0K)</a>

3. Geometric isomers include attached groups on the carbons the double bond.

3,4 diethyl-3-octene (trans)       <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617987/179001/ch22_15.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (7.0K)</a>

3,4 diethyl-3-octene (cis)          <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078617987/179001/ch22_16.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (8.0K)</a>>

or trans-6-dodecene and cis-6-dodecene

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