Bending combinations

Figure C 1.3.3. Comparison between infrared spectra for tire p bend combination band of Ar-HF obtained in tire gas phase and in a slit jet. (a) The gas-phase spectmm (Taken from 1361). (b) The slit jet spectmm (Taken from 1611).

Figure32.36 Interaction coefficient S-bend combination (after Miller )...

F%, 6, Changes in the relative intensities of the free and associated NH stretching + NH in plane bending combination band of self-assodated N-ethylacetamide. The solutions contained equimolar amounts of one of the following anesthetics E, QH F, CFCI3, G, CH Clj H. CHCI3. From G. Trudeau, K. C. Cole, R, Massuda and C. Sandorfy, Can. J. Chon. 56, 1681 (1978). Reproduced with permission from the National Research Coimdl of Canada... 

Table 1. Computed relative band areas for the NH stretching + in-plane bending combination. (The band areas are on different relative scales for each system and should only be compared within a given column) ...

Fig. 8. The NH stretching + NH in plane bending combination band of 0.27M N-ethylacctamidc in carbon tetrachloride.

The wave numbers of silanol groups in fundamental stretching i/, bending combination i/c and first overtone i/q vibration modes... 

Another tissue type—nails— was studied by Sowa et al., both in vivo and ex vivo [122]. Mid-IR (MIR) and NIR spectra were collected for viable and clipped human nails. Depfh profiling by MIR was performed non-intrusively by phofoacousfic specfroscopy (PAS). Near-infrared ATR, NIR diffuse reflecfance, and PAS were compared. Band assignments were made, such as the N-H stretch-amide II bend combination centered at 4868 cm in this basic study. They concluded that the lower-energy NIR-ATR, for purposes of fheir sfudy, gave the best results. 

The two largest peaks in the first combination region seen in Figure 2.7 are due to the asymmetric and symmetric methylene stretching and bending combinations. The asymmetric combination is at 4336 cm in butane, 4334 in pentane, and 4332 in heptane, whereas the symmetric one is at 4257 in butane, 4262 in pentane, and 4259 in heptane, according to Ricard-Lespade et al. 

FIGURE 2.10 Illustration of the second overtone (3 V) spectral region. Also observed are the first overtone (2 v) stretching and bending combination bands for methyl and methylene as labeled in the figure. 

N-H/C-N/N-H [bonded NH stretching and amide III (C-N stretching/N-H in-plane bending) combination] from polyamide 11... 

N-H/C-N [VgN-H asymmetric and amide HI deformation (C-N stretching/N-H in-plane bending) combination] for urea N-H [ vN-H and amide II deformation (N-H in-plane bending) combination] for secondary amides in native RNase A N-H (35) and N-H stretching combination... 

N-H in-plane bend and C-N stretching and N-H in-plane bend combination N-H native RNase A combination band at 4867 cm shifting due to thermal unfolding (C=0 amide I band)... 

H stretching and bending combination from methanol vO-H and 50-H combination from Methanol O-H 3... 

N-H in-plane bend and C-N stretching and N-H in-plane bend combination... 

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