Transverse vibrations nonrigid dipoles

The d mechanism concerns the same nonrigid 0+—H O- dipole performing a nonharmonic transverse vibration with respect to the equilibrium HB direction. 

Figure 3 Contributions e" to the loss factor of water at 27°C (a, c, e) and of ice at —7°C (b, d, f) due to longitudinal harmonic vibration of a nonrigid dipole (a, b) harmonic reorientation of a permanent dipole (c, d) and nonharmonic transverse vibration of a nonrigid dipole (e, f). Symbols T and V refer, respectively, to the T- and V-bands.

In Figs. 5 and 6, curves 1-4 refer, respectively, to mechanisms a-c—that is, to libration of rigid dipoles in the hat well (1), elastic reorientation of such dipoles (2), elastic translation of nonrigid dipoles (3), and their elastic transverse vibration (4). 

Thin lines in Figs. 5c-h and 6c-h refer to specific contributions due to nonharmonic reorientation of a permanent dipole in the hat potential (1), harmonic longitudinal vibration of HB nonrigid dipole (2), harmonic reorientation of a permanent HB dipole (3), and nonharmonic transverse vibration of a nonrigid HB dipole (4). 

Mechanism d concerns nonelastic vibration of a nonrigid dipole in a direction perpendicular to a nondisturbed H-bond, with such vibration being governed by the transverse force constant k. ... 

Figure 37 Frequency dependences of the loss factor (a) and of the dielectric constant (b) calculated (solid curve) and measured (open circles) in water, (c) Contributions to loss due to libration of a permanent dipole in the hat well (1), vibration of a nonrigid dipole along the H bond (2), reorientation of polar molecules about this bond (3), and transverse vibration of a nonrigid dipole with respect to the H bond (4). Temperature 300 K.

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