Question

Be sure to answer all parts. Rank the following groups in order of decreasing priority: A. −COOH B. −H C. −NH2 D. −OH

Answer 1

Explanation:

More is the mass of directly attached atom more will be the priority of the group attached to the alkyl or aryl chain.

Atomic mass of oxygen is 16, nitrogen is 14, carbon is 12, and hydrogen is 1.

This means that as the atomic mass of oxygen is greater than rest of the given atoms. So, priority will be given to the oxygen atom.

Thus, we can conclude that the given groups are placed in order of decreasing priority as follows.

             -OH > $-NH_{2}$ > -COOH > -H