The spectra of the complexes involving a water molecule and a proton acceptor molecule are obtained by using ternary mixtures water – base – carbon tetrachloride. The vibrational assignment of these spectra is performed through a prior calculation and by examining the shape of the absorptions and their frequencies according to the base. With the complexes HOH … B, it is observed that the bands related to the v(011) combinations, which involve the free OH group, are narrower than v(110) and have always a larger extinction coefficient. In the 7000–7300 cm−1 region, the most intense absorption is the v(101) combination with the weak bases, but the &([a-z]+);(002) overtone with the strong ones.