Question

Which oxoanion has least tendency of polymerisation?

Answer 1

Tendency to polymerize is seen by free radical only when the element is carbon.

It depends on the ability to form pπ-pπ bonds with itself.

We know that nitrogen can not undergo catenation. So following the trend 1st element in a group will not undergo catenation, Boron should be the answer.

Answer 2

Boron oxoanion has least tendency of polymerization.

Explanation:  

• The tendency of polymerization of a compound depends on its ability to form Pi bond with the same type of element.  

• Since oxygen has a valency of 2 in most of the condition hence only those compound which can form a valency of 4 can polymerize with each other.  

• The ability to polymerize is most for Carbon and is least for Boron since it is a member of the first group.  

• So all the oxoanion of Boron will have the minimum tendency to polymerize with each other.

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