Progression of type ndon in the Neuronal Signaling absorption spectrum, consisting obtained from a vibration excitation and multiple quantum phonon excitation.30, 31, however, seem polarized spectra for the CAN and D8 ACN measured crystals to incomplete Complete, and pr Presents a single Fl Surface of the crystal . The IR spectra of the samples in ACN D in the range of frequencies of the ND and NH bands ν ν has not been established. In addition, no papers on H / D isotope effects in the spectra have been published VER. 3.3. Early studies of ACN crystal spectra. The IR spectrum of the ACN in the range of vibration frequencies extends the proton, which is in the range of 3350 2800 cm 1, consists of a number of spectral lines. In the case of ACN, the shift is relatively low ν NH band at lower frequencies observed in comparison with the oscillation frequency of the NH bond is not Associated equipment Engined stretching, h Highest likely the result of a relatively low energy hydrogen bonds in the crystal. IR spectra of the samples by the technique polycrystalline KBr pellet cooled to room temperature and measured liquid nitrogen, are shown in Figure 2. In addition, the Raman spectrum is also shown in Figure 2 identify the CH stretching vibration bands ν. The identification of these bands is useful for the detection of single ACN Kristallfl Chen. 3.4. Effects of temperature in ACN Spectra crystal. The IR spectra of crystalline ACN show the presence of the complex effects of temperature caused by a disproportionate increase in the intensity t of the branches ν NH band component may need during the temperature decrease are marked. The influence of temperature on the polarized IR spectra in the frequency range of NH stretching vibration of the crystal binding of ACN with AB and BC Kristallfl Chen is developed measured shown in Figure 3. All spectral lines, with the exception of the B Santander ν CH stretching vibration, respond fa Is anything similar changes In temperature. In general, can kill two spectral Residents distinguish because of their habits are developed and fine structure. In the case of N-methylacetamide crystal spectra, two simple, unstructured components ν NH band to the amide A and amide B, can be observed.18, 32,33 3.5. Linear dichroic effects Questions in ACN Spectra crystal. The nuclear polarization effects to be interpreted in the spectra to the orientation of the electric field vector E of the incident beam in the reference system cha Hydrogen bond is not oriented in space in the network obtain under experimental conditions. Figure 4a shows the IR spectra of the polarized single crystal ACN AB develops, with the face at 77 K in the range of frequency band ν NH measured. 4b again in the polarized spectra of the liquid crystal with ACN surface of British Columbia are shown in the same manner. The polarized IR spectra for the two crystalline forms, which appears with a different face to the point measured To be similar as others. The main difference between them is that Davydov splitting in the st Strongest lines of the component branches of the observed bands. in turn, is both limited spectral frequency branch, no differentiation of the effects of linear dichro Question observed. Theoretically, in polarized IR spectra of typical systems with cha Ties hydrogen bonded networks should say this bias.