R3 N>R2NH>RNH2>NH3R_{3} \mathrm{~N}>\mathrm{R}_{2} \mathrm{NH}>\mathrm{RNH}_{2}>\mathrm{NH}_{3}R3 N>R2NH>RNH2>NH3
R2NH>R3 N>RNH2>NH3R_{2} \mathrm{NH}>\mathrm{R}_{3} \mathrm{~N}>\mathrm{RNH}_{2}>\mathrm{NH}_{3}R2NH>R3 N>RNH2>NH3
R2NH>RNH2>R3 N>NH3\mathrm{R}_{2} \mathrm{NH}>\mathrm{RNH}_{2}>\mathrm{R}_{3} \mathrm{~N}>\mathrm{NH}_{3}R2NH>RNH2>R3 N>NH3
R2NH<RHN2<R3 N<NH3\mathrm{R}_{2} \mathrm{NH}<\mathrm{RHN}_{2}<\mathrm{R}_{3} \mathrm{~N}<\mathrm{NH}_{3}R2NH<RHN2<R3 N<NH3