Benzene solid Raman spectrum

Typically, the UV Raman spectra of various hydrocarbons adsorbed in zeolites have been found to be similar to their spectra in solution, as a pure liquid, or as a pure solid (25). This is an important finding because the UV Raman spectra of free molecules (which are relatively quick and easy to measure) can be used for fingerprint identification of adsorbed species. One minor exception to this rule is the Raman spectrum of naphthalene, which shows some changes in the pattern of peak intensities between solid naphthalene and naphthalene adsorbed in ultrastable Y-zeolite. In this case, the adsorbed naphthalene spectrum more closely resembles that of the molecule in solution with benzene or CCI4, which suggests that interaction with the pore walls of the zeolite was similar to solvent interactions. The smaller pore diameters and pore intersections in zeolite MFI compared to Y-zeolite might be expected to produce more pronounced changes in molecular vibrational spectra as a consequence of steric interactions of the molecules with the pore walls. 

Tetramethyldiphosphane disulfide is stable in air. The crystals are soluble in chloroform and acetone, moderately soluble in benzene and toluene, slightly soluble in alcohols, and insoluble in ether and pentane. In the solid state the preferred conformation is trans, as indicated by one strong P—S stretching absorption in the infrared spectrum (Nujol mull) at 567 cm.-1, and the absence of a P—P band, which is found only in the Raman spectrum at 445 cm.-1.9 Other principal absorption bands are at 733, 745, 860, 882, 939, and 1281 cm."1. 

See text. Solid state spectra (Nu)ol or KBr) unless otherwise stated, only strong bands quoted. Relative to CD NO electrode. Petroleum ether solution. iriphos = PhP(CH2CH2PPh2)2- Benzene solution. Toluene solution. Raman spectrum... 

Janik and co-workers (1969) carried out incoherent inelastic neutron scattering studies on solid methane. They studied the lattice vibrations and molecular rotation in this solid near the melting point. Ito (1964) reported the lattice vibrational Raman spectrum of solid methyl iodide. Durig, Craven, and Bragin (1970) studied the low-frequency vibrations in the solid phases of two classes of molecules (CH3)jMCl and (CH3)3MBr where M was C, Si, and Ge. The infrared spectra of solid CCI4, benzene, and CS2, pure and activated by the impurities I3 and HCl, were studied by Munier and Hadni (1968). Colombo (1968) described the low-frequency Raman spectrum of single crystals of imidazole. 

Here, T is the observed line width (Av << F), 7d is the peak-to-valley intensity in the difference spectrum, and To is the peak height of the Raman line. Although this equation is for Lorentzian-shaped bands, the results are approximately the same for Gaussian-shaped bands (the constant 0.385 becomes 0.350). In the case of carbon disulfide-benzene mixtures, the smallest shift observed was -0.06 cm-1, and the associated error was 0.02 cm-1 (77). A convenient rotating system that can be used for (1) difference spectroscopy, (2) normal rotating sample techniques (solid and solution), and (3) automatic scanning of the depolarization ratios as a function of the wave number has been designed (45). 

Figure 17 The Raman excitation spectrum for a transition to the B electronic state of iodo-benzene with one quantum of vibrational excitation in the v, vibrational mode. (Solid line) computed in the harmonic approximation for the motion in the B state. (Dotted line) The maximal entropy fit of this spectrum obtained using Eq. (97). This fit is used to determine the cross-correlation function as shown in Fig. 18. (From Ref. (102).)...

Indium(III) iodide is a yellow hygroscopic crystalline solid, mp 210°. The compound exists in the solid state as iodine bridged dimers (I2lnl2lnl2) and is readily soluble in organic solvents such as benzene, chloroform, and diethyl ether. The vibrational spectrum has been reported, but the observed infrared and Raman frequencies occur in the far-infrared region, below 250 cm . ... 

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