Chapter 15: Q68. (page 570)
Question: What monomer is needed to form each polymer?
a.
b.
Answer
a.
b.
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Question: Resveratrol is an antioxidant found in the skin of red grapes. Its anticancer, anti-inflammatory,and various cardiovascular effects are under active investigation. (a) Draw all resonancestructures for the radical that results from homolysis of the OH bond shown in red. (b) Explainwhy homolysis of this OH bond is preferred to homolysis of either OH bond in the otherbenzene ring.
Question:A and B, isomers of molecular formula C3H5Cl3 , are formed by the radical chlorination of a dihalide C of molecular formula C3H6Cl2 .
(a) Identify the structures of A and B from the following NMR data:
Compound A: singlet at 2.23 and singlet at 4.04 ppmCompound B: doublet at 1.69, multiplet at 4.34, and a doublet at 5.85 ppm
(b) What is the structure of C?
Question: Draw a stepwise mechanism for the following reaction.
Question: (a)Draw the structure of polystyrene, the chapter-opening molecule, which is formed by polymerizing the monomer styrene, C6H5CH=CH2. (b) What monomer is used to form poly(vinyl acetate), a polymer used in paints and adhesives?
Question: As we will learn in Chapter 30, styrene derivatives such as A can be polymerized by way of cationic rather than radical intermediates. Cationic polymerization is an example of electrophilic addition to an alkene involving carbocations.
a. Draw a short segment of the polymer formed by the polymerization of A.
b. Why does A react faster than styrene (C6H5CH=CH2)in a cationic polymerization?
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