Arrange the following amines in order of decreasing basicity (most to least)in aqueous solution:

Question

Quizplus · Accepted Answer

In aqueous solution, basicity is determined by the ability of the amine to accept a proton (H+). The greater the ability to accept a proton, the stronger the base. The order of basicity can be determined by looking at the electron-donating groups attached to the nitrogen, as well as the size of the molecule.

In this case, amine III has the largest electron-donating group (-CH3) and is therefore the most basic. Amine I is next in line because it has two electron-donating groups (-CH3) and is larger than amine II. Amine II is then followed by amine IV, which has no electron-donating groups and is the smallest molecule.

Therefore, the correct order from most basic to least basic is III > I > II > IV. This is represented by choice C.

Arrange the Following Amines in Order of Decreasing Basicity (Most