Uranyl infrared spectrum

An infrared spectrum of the product provides a quick check on the presence of U(VI). The uranyl ion in incompletely reduced samples exhibits a strong peak at 930 cm. , while the nearest acetate band is at 965 cm. ... 

Chlorotris(//-cyclopentadienyl)uranium(IV) is an oxygen-sensitive brown solid. It can be handled in air for brief periods of time with minimal oxidation, which is evidenced by darkening of the color. The compound is soluble in ethereal and aromatic solvents but only sparingly soluble in aliphatic hydrocarbons. Solutions are exceedingly air-sensitive. The nmr spectrum in benzene exhibits a sharp singlet 9.6 ppm to high field of the solvent (r 12.4). The infrared spectrum (Nujol mull) exhibits typical 7t-cyclopentadienyl bands at 1013 (m) and 784 (s) cm i. Oxidation is evidenced by the appearance of the antisymmetric v(OUO) stretch of the uranyl group at 930 cm-i. 

Figure 1. Infrared Spectrum of Triuranium Octoxide (-----) and the coordination Product of Uranyl... 

Figure 2- Infrared Spectrum of Uranyl Nitrate Hexahydrate,...

The infrared spectrum of uranyl nitrate hexahydrate is shown in Figure 2 and the infrared spectrum of UNHH in Figure... 

Uranyl phthalocyanine 31) has a linear 0—U—O bond system whose asymmetric stretching frequency occurs at 920 cm-1. A band observed at 278 cm-1 in the far infrared is assigned to the 0—U—O bending vibration. The electronic spectrum of uranyl phthalocyanine in 1-chloronaphthalene is unique in having no absorption in the 500-800 mju region. All other phthalocyanines exhibit bands in this region (see Section V,B). The complex may be purified by sublimation, but is demetallated in sulfuric acid. 

Uranium pentafluoride prepared in the above maimer is the low-temperature, form, which can be identified by its characteristic X-ray powder pattern. The single<rystal structure has been determined tetragonal symmetry, space group I42d(Z = 8), with eight-coordination and a geometry intermediate between a dodecahedron and a square antiprism. Uranium pentafluoride is air sensitive and disproportionates in water to give a precipitate of uranium tetrafluoride and a solution of uranyl fluoride. Consequently, UFs must be handled in an inert atmosphere. The near-infrared-visible spectrum of uranium pentafluoride in acetonitrile has been determined and is perhaps the most convenient characterization. 

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