Spectroscopic studies, infrared

S. 11.2.2 Nuclear Magnetic Resonance Spectroscopic Studies S. 11.2.3 Infrared Spectroscopic Studies... 

Ultraviolet absorptions ofvinylogous lactams were found by MOLCAO calculations and compared with experimental values (663). Infrared spectroscopic studies of vinylogous amides (664) and some fifty vinylogous urethanes (665) allowed configurational and structural assignments. The effect of enamine-imine equilibrium in a series of benzophenone derivatives was established (666) and the effect of structure on enamine basicity studied (667). 

Amino-pyrazines and -pyridazines have been shown to exist predominantly in the amino form by infrared spectroscopic studies (cf. Table VI). Ultraviolet spectral data have been interpreted to indicate that 4-aminocinnoline exists predominantly in the imino form 256, but this conclusion, which was based on comparison of its spectrum with those of cinnolin-4-one and 4-ethoxycinnoline, is probably incorrect. Ultraviolet spectroscopic data strongly support the predominance of amino structures for 2-aminopyrazine (257) and 2-aminoquin-oxaline how ever, the former compound was at first erroneously concluded to exist in the imino form from ultraviolet spectral evidence. Isolation of two isomers of 2-amino-8-dimethylamino-3-methylphenazine, assigned the amino and imino structures 258 and 259, respectively, has been claimed, but it is very unlikely that these assignments are correct. 

Poti and Ruff have also reported recently that infrared spectroscopic studies indicate that the magnesium function in indole magnesium iodide is associated with the nitrogen atom of the indole nucleus and not the carbon atom in the 3-position. 

Crisp, S., O Neill, I. K., Prosser, H. J., Stuart, B. Wilson, A. D. (1978). Infrared spectroscopic studies on the development of crystallinity in dental zinc phosphate cements. Journal of Dental Research, 57, 245-54. 

Nicholson, J. W., Brookman, P. J., Lacy, O. M. Wilson, A. D. (1988b). Fourier transform infrared spectroscopic study of the role of tartaric acid in glass-ionomer cements. Journal of Dental Research, 67, 145CM. 

A number of infrared spectroscopic studies have been made which have thrown light on the cement-forming reaction (Copeland et al., 1955 Gemer et al., 1966 Wilson Mesley, 1972). Wilson Mesley (1972) used ATR spectroscopy to follow the course of the reaction and showed that major spectral changes were almost entirely associated with loss of the... 

Kunimatsu K. 1986. Infrared spectroscopic study of methanol and formic acid adsorbates on a platinum electrode Part I. Comparison of the infrared absorption intensities of hnear CO(a) derived from CO, CH3OH and HCOOH. J Electroanal Chem 213 149 157. 

Maillard F, Savinova FR, Simonov PA, Zaikovskii VI, Stimnting U. 2004b. Infrared spectroscopic study of CO adsorption and electro-oxidation on carbon-supported Pt nanoparticles Interparticle versus intiaparticle heterogeneity. J Phys Chem B 108 17893-17904. 

Beden B, Hahn F, Juanto S, Lamy C, Leger JM. 1987a. Infrared spectroscopic study of the methanol adsorbates at a platinum electrode Part I. Influence of the bulk concentration of methanol upon the nature of the adsorbates. J Electroanal Chem 225 215-225. 

Chang SC, Hamelin A, Weaver MJ. 1991. Dependence of the electrooxidation rates of carbon-monoxide at gold on the surface crystallographic orientation—A combined kinetic-surface infrared spectroscopic study. J Phys Chem 95 5560-5567. 

J. F. Carpenter and J. H. Crowe, An infrared spectroscopic study of the interactions of carbohydrates with dried proteins, Biochemistry, 28, 3916 (1989). 

Trudeau, G., Dupuis, P., Sandorfy, C., Dumas, J.-M. and Guerin, M. Intermolecular Interactions and Anesthesia Infrared Spectroscopic Studies. 93, 91-125 (1980). 

Schaumberg et al. [58] made a qualitative infrared spectroscopic study of water-soluble compounds extracted from sewage sludge/oil mixtures which were being incubated in the laboratory for 100 weeks at 25°C, and the results are presented. It was found that there was a pattern to the microbial decomposition of anaerobically-digested sewage sludge which involved the disappearance of carbohydrate, protein, sulphonate, and/or sulphate compounds, coupled with the appearance of carboxylates and nitrates. 

A. Fujii, S. Enomoto, M. Miyazaki, and N. Mikami, Morphology of protonated methanol clusters An infrared spectroscopic study of hydrogen bond networks of H+(CH30H)n (n 4 15). 

M. A. Czarnecki, Near infrared spectroscopic study of hydrogen bonding in chiral and racemic octan 2 ol. J. Phys. Chem. A 107, 1941 1944 (2003). 

For infrared spectroscopic studies, all the procedures described above were done while the electrode was set in the IR cell shown in Chapter 1. The electrolj s and the rinse water were supplyed and withdrawn through the tubes attached to the cell. 

Nuclear magnetic resonance has frequently been employed for general studies and for the structural studies of petroleum constituents (Bouquet and BaiUeul, 1982 Hasan et al., 1989). In fact, proton magnetic resonance (PMR) studies (along with infrared spectroscopic studies) were perhaps the first studies of the modem era that allowed stmctmal inferences to be made about the polynuclear aromatic systems that occm in the high-molecular-weight constituents of petroleum. 

Mauritz, K. A. and Warren, R. M. 1989. Microstructural evolution of a silicon-oxide phase in a perfluorosulfonic acid ionomer by an in situ sol-gel reaction. 1. Infrared spectroscopic studies. Macromolecules 22 1730-1734. 

In a detailed infrared spectroscopic study. Peri and Hannan (333) confirmed the existence of at least three types of isolated hydroxyl groups on y-alumina. 

Pate, C. T., B. J. Finlayson, and J. N. Pitts, Jr. A long path infrared spectroscopic study of the reaction of methylperoxy free radicals with nitric oxide. J. Amer. Chem. Soc. % 6554-6558, 1973. 

The rate of the overall catalytic reaction is not very high, TOF =15.4 h at 140 X, 4 bar CO, 30 bar ethene, 0.01 M [Ru] and 0.1 M CF3SO3H. Infrared spectroscopic studies revealed no change in the concentration of the acylruthenium species during the reaction which suggests that the rate... 

Shin, S Arakawa, H Hatakeyama, Y Ogawa, K Shimomura, K. Absorption of NO in the lattice of an oxygen-deficient perovskite SrFeOs.x and the infrared spectroscopic study of the system NO-SrFeOs.x. Mater. Res. Bull, 1979, Volume 14, Issue 5, 633-639. 

Grap, R.T., Koenig, J.L. and Ishida, H. (1985). Diffuse reflectance fourier transform infrared spectroscopic study of chemical bonding and hydrothermal stability of an aminosilane on metal oxide surfaces. J. Adhesion 18, 93-110. 

Ishida, H., Koenig, J.L. (1978). Fourier transformed infrared spectroscopic study of the silane coupling agent/porous silica interface. J. Colloid. Interface Sci. 64, 555-564. 

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