The mid (4000-500 cm^-1) and near (10,000-4000 cm^-1) infrared spectra of solutions in liquid krypton containing mixtures of F₂ClCH and FCD₃ or of Cl₂FCH and FCD₃ show the formation of 1:1 complexes. MP2/6-311++G(2d, 2p) ab initio calculations suggest that the main interaction responsible for the formation of the complexes is the hydrogen bond between the haloform C-H bond and the fluorine atom of the base molecule. The observation of blue shifts upon complexation of 24.8, 51.5 and 87 cm^-1 for the fundamental, the first and the second overtone of the haloform ν₁ in F₂ClCH, and of 25.0, 50.2 and 87 cm^-1 in Cl₂FCH show that in either case the hydrogen bond is of the blue-shifting type. Upon complexation the intensity of the fundamental ν₁ in F₂ClCH decreases by a factor of approximately 5, while that in Cl₂FCH increases, by a factor of approximately 4. At the same time, the intensities of the first and second overtones reveal only modest decreases. The MP2/6-311++G(2d, 2p) calculations predict the existence of more than one conformer for either complex. No spectral evidence for conformational equilibria in the complexes has been detected. One-dimensional anharmonic model calculations have been made to simulate the blue shift and intensity behaviour of the haloform ν₁ vibrations. For both complexes these calculations reproduce the experimental data with reasonable success.