Trimethylamine, ethylmethylamine, and propylamine are constitutional isomers. Based on their shapes and hydrogen bonding ability, which of the following is true regarding their boiling points?
A) They all have very nearly the same boiling points, so it is hard to predict the order.
B) The predictions based on shape are opposite to those based on hydrogen bonding considerations, so it is hard to predict the order.
C) propylamine < ethylmethylamine < trimethylamine
D) propylamine > ethylmethylamine > trimethylamine
D
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