Chem 101 Book Answers (Ch.13)

Chem 101 Book Answers (Ch.13) - Chapter 13 Organic...

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Chapter 13 Organic Chemistry 13-1 O O N O O HH H H 1. What is the difference between saturated and unsaturated hydrocarbons? Alkanes contain only single bonds and are saturated hydrocarbons because they cannot react with hydrogen to produce more C-H bonds. However, multiple (double or triple) bonds are unsaturated because an H 2 molecule can add across a multiple bond to form two C-H bonds. For example, ethene can be hydrogenated to ethane: H 2 C=CH 2 + H 2 H 3 C-CH 3 . Thus, alkenes are unsaturated. Molecules with many double bonds (polyenes) are said to be polyunsaturated. 3. How do condensed structures and skeletal structures differ? C-H bonds are not shown explicitly in either. However, the carbon and hydrogen atoms are shown in a condensed structure, whereas only the C-C bonds are shown in a skeletal structure. The condensed and skeletal structures of ethane are: H 3 C-CH 3 and , respectively. 5. Why are alkenes more reactive than alkanes? Are alkenes Lewis acids or Lewis bases? Explain. The π electrons in alkenes are Lewis bases, which is why alkenes are more reactive than alkanes.
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Chem 101 Book Answers (Ch.13) - Chapter 13 Organic...

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