Infrared spectroscopy coordination compounds

Work has also been conducted that involved the investigation, via infrared spectroscopy, of matrix-isolated, plutonium oxides (40), with the appropriate precautions being taken because of the toxicity of plutonium and its compounds. A sputtering technique was used to vaporize the metal. The IR spectra of PuO and PUO2 in both Ar and Kr matrices were identified, with the observed frequencies for the latter (794.25 and 786.80 cm", respectively) assigned to the stretchingmode of Pu 02. Normal-coordinate analysis of the PUO2 isotopomers, Pu 02, Pu 02, and Pu 0 0 in Ar showed that the molecule is linear. The PuO molecule was observed in multiple sites in Ar matrices, but not in Kr, with Pu 0 at 822.28 cm" in the most stable, Ar site, and at 817.27 cm" in Kr. No evidence for PuOa was observed. 

The spectroscopy, reaction kinetics, and photophysics of coordinatively unsaturated metal carbonyls generated in the gas phase via UV photolysis are probed via transient infrared spectroscopy. The parent compounds that have been used to generate coordinatively unsaturated species are Fe(CO)5, Cr(C0)5 and Mn2(CO)io- In contrast to what is observed in solution phase, photolysis of these compounds produces a variety of coordinatively unsaturated photoproducts. 

Nakamoto, K. Infrared and Raman Spectra of Inorganic and Coordination Compounds Wlley-Intersclence New York, 1986. Long, D. A. Raman Spectroscopy McGraw-Hill New York, 1977. Loehr, T. M. Sanders-Loehr, J. In Copper Proteins and Copper Enzymes Lontle, R., Ed. CRC Press Boca Raton, 1984 pp. 115-155. 

Applications in infrared spectroscopy A and B bands, iron-coordinated CO, 232, 186-187 application to allosteric mechanisms, 249, 566 bacteriorhodopsin, 246, 9, 380-381 caged compounds, 246, 6, 520-521 DNA [base pair formation, 246, 506 conformation, 246, 506-507 denaturation thermodynamics, 246, 506 ligand interactions, 246, 6, 507 sample requirements, 246, 506] fatty acyl ester determination in small cell samples, 233,... 

Nakamoto, K. Infrared and Raman Spectra of Inorganic and Coordination Compounds, Vol. 2, 5th Edition, John Wiley Sons, Inc., New York, NY, 1997. Nakamoto, K. and J.R. Ferraro Introductory Raman Spectroscopy, Academic Press. Inc.. 1994. 

K. Nakamoto, Infrared and Raman Spectroscopy of Inorganic and Coordination Compounds , 3rd edn., ed. K. Nakamoto, Wiley, New York, 1978. 

Tt is well-known that Werner determined the structure of a number of metal complexes by skillfully combining his famous coordination theory with chemical methods (30). Modern physico-chemical methods such as x-ray diffraction and infrared spectroscopy, used in the study of Werner complexes, have paralleled the development of these techniques. The results of these investigations have not only confirmed the validity of Werner s coordination theory but have also provided more detailed structural and bonding information. In early 1932, Damaschun (13) measured the Raman spectra of seven complex ions, such as [Cu(NH3)4]" and [Zn(CN)4j and these may be the first vibrational spectra ever obtained for Werner complexes. In these early days, vibrational spectra were mainly observed as Raman spectra because they were technically much easier to obtain than infrared spectra. In 1939, Wilson 35, 36) developed a new theory, the GF method," which enabled him to analyze the normal vibrations of complex molecules. This theoretical revolution, coupled with rapid developments of commercial infrared and Raman instruments after World War II, ushered in the most fruitful period in the history of vibrational studies of inorganic and coordination compounds. 

The ambident coordination of the cyanide in the polymeric compounds is most easily demonstrated by infrared spectroscopy. The stretching... 

Hadjiivanov et al. [86] studied the compounds formed during adsorption of NO2 on anatase by means of infrared spectroscopy. They detected a variety of compounds such as (i) Ti-02N0H species (ii) monodentate and bidentate nitrates coordinated with water and (iii) nitrates and NO+. The adsorption of NO2 neutralizes the Lewis sites under formation of nitrates and generates Bronsted sites. Adsorption of NH3 on N02-Ti02 surfaces leads to the formation of NH4. 

For detailed discussions of IR spectroscopy in metal carbonyls, see K. Nakamoto (1997) Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B, 5th edn, Wiley, New York, p. 126 S.F.A. Kettle, E. Diana, R. Rossetti and P.L. Stanghellini (1998) Journal of Chemical Education, vol. 75, p. 1333 - Bis(dicarbonyl-7r-cyclopentadi-enyliron) a solid-state vibrational spectroscopic lesson . 

The application of infrared spectroscopy to the inorganic compounds started as a more frequent technique during the 60 s with Lawson. This author made a first attempt to compile the work done in the relatively new field-inorganic Infrared Spectroscopy since 1952 where 1171 references were reported. Farmer, in 1964, studied the silicates and Nakamoto in relation to the coordinated compounds prepared a helpful atlas of these compounds. Afremow (1966) presented for an important research of inorganic pigments and extenders in the mid-infrared region from 1500 cm-1 to 200 cm-1. The study of surface chemistry and the nature of surface functional groups was also advanced by Basila (1968). 

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