IR = infrared spectrum

M = Zr or Hf. P = dissociation pressure measurements IR = infrared spectrum AH = thermochemical data NMR = h NMR spectrum A = electrical conductance x = magnetic susceptibility. 

See text. XD = X-ray diffracUon IR = infrared spectrum R = Raman spectrum UV = ultraviolet spectrum H-NMR = h NMR spectrum C-NMR = "C NMR spectrum F-NMR = "f NMR spectrum MS = mass spectrum PES — photoelectron spectrum E — electric polarization and dielectric loss measurements D - dipole moment measurements TDPAC = time differential perturbed angular correlation measurements 1... u.... . . Isolated as the THF adduct M(dik)Cl3-C4HgO. 

Dipole moment in benzene solution at 20 °C. " AH is the enthalpy o the reaction in equation (42). IR = infrared spectrum NMR — NMR spectrum M = molecular weight A — electrical conductance. 

M = Zr or Hf. IR = infrared spectrum R = Raman spectrum NMR= HNMR spectrum Aff = Ifaermochemical data M = molecular weight A = electrical conductance XD = X-ray diffraction P = vapor pressure measurements. 

Increasing v pertains to a vibrational excitation of the molecule, and requires the energy to be smaller by one or two orders of magnitude than an electronic excitation (IR. infrared spectrum). 

IRE Infrared emission IR emission spectrum observed High resolution, long... 

The simplicity of the infrared spectrum of solid Cgo (see Fig. 9), which shows four prominent lines at 527, 576, 1183, 1428 cm each with Ti symmetry [4], provides a convenient method for characterizing Cqq samples [4, 88]. The IR spectrum of solid Cqq remains almost unchanged relative to the isolated Ceo molecule, with the most prominent addition being the weak feature at... 

Figure 4.22. The infrared spectrum of gas phase CO shows rotational fine structure, which disappears upon adsorption, as shown by the spectrum of CO adsorbed on an Ir/Si02 catalyst. [J.W. Niemantsverdriet, Spectroscopy in Catalysis, An Introduction (2000), Wiley-VCH, Weinheim.]...

The formation of appreciable quantities (up to "oQ0% based on the initial additive concentration) of the grafted substituted hydroxylamine O W0PP as from reaction 7) in photo-degrading PPH can be demonstrated by indirect methods (10, 11). For example after the rapid loss of the initial concentration of a piperidine or its nitroxide in PPH film, heating the film immersed in isooctane for several hours at 100 C in the presence of oxygen causes the re-appearance of nitroxide in appreciable quantities as measured by e.s.r. spectroscopy (ll). This nitroxide most likely results from a reaction analogous to reaction 8 (l2). In addition we have observed the ) N-0-C band (at 1306 cm 1) in the infrared spectrum of irradiated, nitroxide-containing PP films by Fourier Transform IR spectroscopy (ll)., ... 

The infrared (IR) absorption spectrum of primaquine diphosphate was obtained as KBr disc using a Perkin-Elmer infrared spectrometer. The infrared spectrum is shown in Fig. 4 and the principal peaks are at 2946, 1612, 1469, 1430, 1384, 1200, 1050, 956, 815, and 760 cm-1. The assignments of the infrared absorption bands of primaquine diphosphate are shown in Table 2. Clarke reported the following principal peaks at 1611, 1595, 815, 1230, 1572, and 1170 cm-1 (KBr disk) [2],... 

It must be acknowledged, however, that the determination of the number of the different surface species which are formed during an adsorption process is often more difficult by means of calorimetry than by spectroscopic techniques. This may be phrased differently by saying that the resolution of spectra is usually better than the resolution of thermograms. Progress in data correction and analysis should probably improve the calorimetric results in that respect. The complex interactions with surface cations, anions, and defects which occur when carbon monoxide contacts nickel oxide at room temperature are thus revealed by the modifications of the infrared spectrum of the sample (75) but not by the differential heats of the CO-adsorption (76). Any modification of the nickel-oxide surface which alters its defect structure produces, however, a change of its energy spectrum with respect to carbon monoxide that is more clearly shown by heat-flow calorimetry (77) than by IR spectroscopy. 

The second measurement, the infrared (IR) absorption spectrum, is described in the next section. 

In support of Chapman s assignment7 of the matrix infrared spectrum of the product formed from la, the calculations of Matzinger et al. found that the experimental IR spectmm agrees well with the spectrum calculated for 3a, but not with that computed for 2a.55 The calculations for 3a reproduced the weak allene stretching band that Chapman et al. observed at 1823 cm-1. 

The infrared spectrum of griseofulvln, obtained as a mineral oil mull, was run on a Perkin-Elmer Model 180 grating IR spectrophotometer. Important absorption assignments are given in Table V. The spectrum is given in Figure 6. 

The infrared spectrum of hydralazine hydrochloride (Figure 1) was obtained with a Beckman IR-12 spectrophotometer. A mineral oil dispersion between potassium bromide plates was scanned from 420 to 4000 cm-1, and a thicker layer of the dispersion, supported on polyethylene film,... 

Figure 1 is the infrared spectrum taken from a mineral oil suspension of a representative sample of calcium leucovorin. A common feature of folate derivative ir spectra obtained in this laboratory is the absence of sharp absorption bands, which is usually attributed to lack of crystallinity. Below are listed the major absorption assignments ... 

The infrared spectrum of pseudoephedrine hydrochloride is shown in Figure 1. It was obtained as a 0.2% dispersion of pseudoephedrine hydrochloride in KBr with a Nicolet Model 7199 FT-IR spectrophotometer.2 Table I gives the infrared assignments consistent with the structure of pseudoephedrine hydrochloride. 

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