Vibrational mode scissor

Figure 9.22 Simple vibration modes for carbon dioxide, 0=C=0 (a) a symmetric stretching mode and (b) a scissor mode vibration...

FIG. 9 Diagram illustrating the three vibrational modes (31V— 6) of water in the gas phase. (A) The first mode is called bending, in which the water molecule moves in a scissors-like manner. (B) The second is the symmetric stretch, where the hydrogen atoms move away from (or toward) the central oxygen atom simultaneously—i.e., in-phase motion. (C) The third is the asymmetric stretch, in which one hydrogen atom approaches the central oxygen atom, while the other moves away—i.e., out-of-phase motion. 

Fig. 5.3. The three vibrational modes of H2S. (A) Represents the scissoring motion, (B) is the symmetrical stretch and (C) is the asymmetrical stretch.

Figure 4.3 Vibrational modes of a nonlinear triatomic molecule such as H20. Arrows indicate motion in the plane of the paper, + is towards and - away from the observer, (a) symmetric stretching, (b) asymmetric stretching, (c) out-of-plane wagging, (d) out-of-plane twisting, (e) in-plane scissoring, (f) in-plane rocking.

Fig. 6.15 The increase in the Si-O-Si vibrational modes (980-1200 cm"1) upon storage of a high porosity (75%) micro PS layer formed on a p-type substrate (0.2 Q cm) in ambient air. The Si—H2 scissors mode (905 cm"1) shows little time dependence. After [Th7],...

The remaining two vibrational modes studied imder bending vibrations involves scissoring. This is due to the bending motion in all possible planes around the bond axis. Since turning the plane of vibrations can not alter the energy it leads to deformation vibration to produce a peak in the region 667 cm f This is why CO, shows two absorption peaks, one at 2330 cm and the other at 667... 

The intensities calculated for the intramolecular vibrational modes of the H2CO- HC1 complex are reported for two different basis sets in Table 3.59. The intensification of the mode, V3, is estimated in the range between seven- and eightfold, similar to that predicted for H20-HC1. Within the H2CO molecule, the two CH2 stretches both lose some intensity increases are observed in the CO stretch and the CH2 scissor. Analogous data for the inter-... 

For instance, water has both vibrational and rotational modes. One vibrational mode is the scissor movement of the hydrogens toward and away from each other. A rotational mode is the spinning of the hydrogens about an imaginary axis through oxygen. Both these modes of motion are shown in figure 1.13.1. 

Vibrations of atoms in a molecule can be divided in six different forms symmetrical and antisymmetrical stretching, rocking, scissoring, twisting and wagging. Simple diatomic molecules have only one bond, and only one fundamental vibrational mode (the interatomic stretching mode) is seen in the spectrum. More complex molecules, such as hydrogels, have many bonds, and their vibrational spectrum is much more complex. 

The remaining two vibrational modes of carbon dioxide involve scissoring, as shown here. 

Figure 4.3 Principal modes of vibration between carbon and hydrogen in an alkane (a) symmetrical stretching, (b) asymmetrical stretching and the bending vibrations, (c) scissoring,...

The bending vibrational modes of methylene group The top two dii rams frrocking modes. The bottom two dii rams show wagging and twisting modes. 

In-plane rocking In-plane scissoring Out-of-plane wagging Out-of-plane twisting Figure 11.3 Illustration of some different vibrational modes. 

Fig. V.Z CHj scissoring and rocking bands of the orthorhombic crystal. Vibrational modes are from Krimm, Liang, and Suthertod (1956) and observed frequencies are from Nidson and Holland (1961)... 

Figure 11-17 Various vibrational modes around tetrahedral carbon. The motions ate labeled symmetric and asymmetric stretching or bending, scissoring, rocking, twisting, and wagging.

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