Previous studies of OH stretching band of aqueous solutions of short poly(oxyethylene)s POEs showed similarities between ratios R of the intensities of the component around 3200 cnf' (the collective in-phase OH stretching vibrations of hydrogen-bonded aggregates) and the component around 3400 cnf' (the out of phase OH stretches) in dependence on type and concentration of dissolved POEs. According to previous studies on C1EE1 (n = 1 -4) the intensity ratio R is characterized with two minima. We observed the same behavior in the case of C2E2C2. In addition the perfect match of the spectra of C2E2C2 and those of C1EE1 (n = 1 -4) at different concentration showed that the water structure is influenced in a similar way in the cases of C2E2C2 and of C1E11C1.
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