The CH⋯N interaction between FnH3−nCH (proton donor) and NH3, CH3NH2, and CH2NH (acceptor) is examined by ab initio calculations and compared with the comparable CH⋯O systems. The interaction is strengthened by 1.2 kcal/mol with each F added to the donor, slightly larger than the 1.0 kcal/mol increment for CH⋯O. Like CH⋯O, the CH⋯N interaction behaves like a conventional H-bond in terms of electron density shifts and the magnitudes of the various components of the interaction energy. The CH⋯N interactions are also like CH⋯O in that they both die off more slowly as the H-bonds are stretched, in comparison to corresponding conventional H-bonds. Contrary to the behavior of the OH donor, the CH bond contracts and undergoes a blue shift upon forming a complex with either N or O acceptor, although these changes are somewhat smaller for CH⋯N and not as systematic. The differing trends are attributed to the level of cancellation between opposing forces, and not due to any fundamental difference between the two types of interaction.