(c) ê HO- H₂C=C OH + O=C=N- CH3 CH₂CH₂CH3 N=C=O

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Chapter1: Chemical Foundations
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Write chemical reactions illustrating a polymerization mechanism involving the monomers listed below. Would the reactions be considered step growth or chain growth? Explain and support
### Transcription and Explanation for Educational Website

**Image Content:**

1. **Chemical Reaction (a):**
   - The chemical equation shows a reaction between two compounds. 
   - The first compound is an alcohol with the structure HO-(CH2)4-OH.
   - The second compound is an isocyanate with the structure O=C=N-(CH2)5-C6H5, containing a phenyl group.

2. **Chemical Structure (b):**
   - Diagram of an epoxide ring, characterized by a three-membered cyclic ether represented as a triangle with an oxygen atom at one vertex.

3. **Chemical Structure (c):**
   - The chemical structure exhibits the molecular formula of an alkene, 3-methyl-1-pentene.
   - The molecule has a double bond between two carbon atoms, with one methyl (CH3) group and a propyl (CH2CH2CH3) group attached.

**Educational Explanation:**

- **Section (a):** This is a typical reaction setup between a diol and a diisocyanate, commonly used for the synthesis of polyurethanes, which are versatile and widely used polymers. The reaction proceeds through the formation of urethane linkages.

- **Section (b):** Epoxides are cyclic ethers that are used extensively in organic synthesis due to their high reactivity, which arises from ring strain. Their ability to open up and form new compounds makes them valuable intermediates in chemical reactions.

- **Section (c):** Alkenes, such as 3-methyl-1-pentene, are hydrocarbons with carbon-carbon double bonds, making them unsaturated. They serve as foundational compounds in organic chemistry and are used in the synthesis of a variety of products through addition reactions.
Transcribed Image Text:### Transcription and Explanation for Educational Website **Image Content:** 1. **Chemical Reaction (a):** - The chemical equation shows a reaction between two compounds. - The first compound is an alcohol with the structure HO-(CH2)4-OH. - The second compound is an isocyanate with the structure O=C=N-(CH2)5-C6H5, containing a phenyl group. 2. **Chemical Structure (b):** - Diagram of an epoxide ring, characterized by a three-membered cyclic ether represented as a triangle with an oxygen atom at one vertex. 3. **Chemical Structure (c):** - The chemical structure exhibits the molecular formula of an alkene, 3-methyl-1-pentene. - The molecule has a double bond between two carbon atoms, with one methyl (CH3) group and a propyl (CH2CH2CH3) group attached. **Educational Explanation:** - **Section (a):** This is a typical reaction setup between a diol and a diisocyanate, commonly used for the synthesis of polyurethanes, which are versatile and widely used polymers. The reaction proceeds through the formation of urethane linkages. - **Section (b):** Epoxides are cyclic ethers that are used extensively in organic synthesis due to their high reactivity, which arises from ring strain. Their ability to open up and form new compounds makes them valuable intermediates in chemical reactions. - **Section (c):** Alkenes, such as 3-methyl-1-pentene, are hydrocarbons with carbon-carbon double bonds, making them unsaturated. They serve as foundational compounds in organic chemistry and are used in the synthesis of a variety of products through addition reactions.
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