Spectrum, infrared correlation charts

This section provides correlation charts and operational information for the design and interpretation of ultraviolet-visible spectrophotometric (UV-Vis) measurements. While UV-Vis is perhaps not as information-rich as infrared or nuclear magnetic resonance, it nonetheless has value in structure determination and sample identification. Moreover, it is extremely valuable in quantitative work. Typical UV-Vis instruments cover not only the UV and visible spectrum, but the near-infrared as well. Although there is overlap among the ranges, the approximate breakdown is ... 

It must be emphasized, however, that the frequencies listed in various inorganic structure-spectra correlation charts are for the ionic salts. There are many instances in which the polyatomic anion (c.., NO3, SO4 , col , IO3) becomes coordinated to the cation, and this causes a lowering of the symmetry of the anion. These are anions that have double or triple degenerate vibrations. This is reflected in the infrared spectrum by additional absorptions because of the removal of the degeneracy. Many examples of this are illustrated in the transition-metal complexes involving the above anions [ ]. 

Infrared Correlation Charts, 9-108 to 112 Infrared detectors, 10-245 Infrared Laser Frequencies, 10-261 to 267 Infrared spectrum... 

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