Add groups to complete polyvinyl alcohol, formed by the polymerization of the following monomer. If a carbon atom contains only one hydroxyl group, place it below the carbon backbone, as demonstrated by the hydroxyl group added for you.

The resulting structure is:

R-CH-CH2 (OH) - CH-CH2 (OH) - CH-CH2 (OH) - CH - ...

Explanation:

It can be said that vinyl alcohol cannot be polymerized by addition polymerization, since a very unstable radical would be formed, which is not possible. Generally, it is formed by polymerization and subsequent hydrolysis of the vinyl polyacetate. According to the exercise, the structure that results with its four units can be seen that the hydroxyl groups are found in the methylene carbons