Abstract
Intra-, inter-molecular (inter-bond) and Fermi resonance interactions in water and 12-Crown-4 are considered. The temperature dependences of the corresponding interaction constants, recently published in literature (Refs. 1,2), are compared. It is shown that the main reason for the existing differences in the temperature behaviour of the intramolecular and Fermi resonance interactions between water and crown is the presence of strong temperature dependent H bonds between water molecules and an absence of such or similar bonds between crown molecules. The similarity in the temperature behaviour of the intermolecular (interbond) interaction in water and in crown is because of the similar mechanisms of the intermolecular (interbond) coupling.
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