Vibrational spectra of benzene

In the final section of this chapter, we discuss the vibrational spectra of benzene, its isostructural species CeOg- (rhodizonate dianion), and dibenzene metal complexes. 

Varsanyl S, Szoke S (1969) Vibrational Spectra of Benzene Derivatives. Academic Press, New York... 

Fig. 25. The vibrational spectra of benzene and deuterated benzene adsorbed on a Rh(lll) surface as determined by high-resolution electron energy loss spectroscopy...

G. Varsanyi, A.ssignmentfor Vibrational Spectra of Seven Hundred Benzene Derivatives Ak3.demi Kiado, Budapest. Adam Hilger, London, 1974, pp. 136,... 

G. Varsanyi, Assignments for vibrational spectra of seven hundred benzene derivatives L. Lang, Ed., Adam Hilger London, 1974, Vol. 1. p. 1. 

Varsanyi, G., Assignments for Vibrational Spectra of 700 Benzene Derivatives, Hilger, London (1974). 

The infrared and Raman spectra of benzene are shown in Fig. 7.3.17. It is seen that the Raman lines at 991 and 3062 cm-1 represent Aig vibrations, with P = /j // 3/4 while all remaining lines have p = 3/4. Note that there are... 

The vibrational selection rules treated in Sec. 2.7 are strictly valid in the gas phase, because intermolecular interactions are mostly absent. As an example we present the rotation-vibration infrared and Raman spectra of benzene CgHg in Fig. 4.3-1 on a common scale. According to the rule of mutual exclusion (see Sec. 2.7.3.4), none of the fundamentals should coincide in the two spectra. Of the 20 normal vibrations of QHf, four are infrared active (1A2 , 3 i ), seven Raman active (24 E g, and nine... 

Unfortnnately, no distinct LEED patterns could be generated from the adlayer of benzene chemisorbed on a Pd(lll) single-crystal electrode hence, meaningful results were obtained only from the HREELS experiments. Figure 10(A) shows the HREEL spectmm of benzene on Pd(lll) formed and emersed at 0.5 V based upon the above EC-STM results, a Pd(lll)-c(2V3x3)-rect-CeHe adlayer ( CgUg = 0.17) was assumed to be present on the surface. Except for the peak at 1717 cm, which is due to adventitious CO, all the peaks, when compared to published vibrational spectra of unadsorbed and adsorbed " benzene, are attributable to chemisorbed starting material. Unique to the surface-immobilized aromatic are the peaks labeled (a), 265 cm, and (b), 515 cm", which arise from direct metal-adsorbate (Pd-C) chemical bonds. Peaks (c) and (d) are out-of-plane C-H bends, y(C-H) peaks (e) and (i) are in-plane stretches, v(C-H), whereas peaks (f) and (g) are both inplane bends, 5(C-H). 

Figure 1, Infrared spectra of benzene adsorption in the CH out-of-plane vibration range on LiY (a) and NaY (b) at full benzene loading (5.1 mol/s.c.)...

Vibrational spectra of aniline/cyclohexane and aniline/benzene clusters investigated by infrared depletion spectroscopy with selective resonance—enhanced multiphoton ionization with time-of-flight mass spectrometry (REMPI-TOF mass spectrometry) show186 an... 

G. Varsdnyi, Assignments for Vibrational Spectra of Seven Hundred Benzene Derivatives, Vols. 1 2, Wiley, New York, 1974. 

The CNM analysis in terms of adiabatic internal modes has been carried out to correlate the calculated vibrational spectra of the three dehydrobenzenes, namely ortho- (3), meta- (4) and para-henzyne (5), with the vibrational spectrum of benzene (6). Investigation of dehydrobenzenes with the help of infrared spectroscopy is of considerable interest at the moment since these molecules have been found to represent important intermediates in the reaction of enediyne anticancer drugs with DNA molecules [34-37]. Both 4 and 5 are singlet biradicals and, therefore, they are so labile that they can only be trapped at low temperatures in an argon matrix upon photolytic decomposition of a suitable precursor [38-40]. 

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