Propylamine reacts with bromoethane by nucleophilic substitution to produce a mixture of products.
Which of the following is not a possible product of this reaction?
C3H7NHC2H5\text{C}_3\text{H}_7\text{NHC}_2\text{H}_5C3H7NHC2H5
[(C3H7)2N(C2H5)2]+Br−[(\text{C}_3\text{H}_7)_2\text{N}(\text{C}_2\text{H}_5)_2]^+\text{Br}^-[(C3H7)2N(C2H5)2]+Br−
C3H7N(C2H5)2\text{C}_3\text{H}_7\text{N}(\text{C}_2\text{H}_5)_2C3H7N(C2H5)2
[C3H7N(C2H5)3]+Br−[\text{C}_3\text{H}_7\text{N}(\text{C}_2\text{H}_5)_3]^+\text{Br}^-[C3H7N(C2H5)3]+Br−