Chemistry, spectroscopy, and isotope-selective infrared photochemistry of a volatile uranium compound tailored for 10-.mu. absorption: uranium hexamethoxide (U(OCH3)6)

Mixed Uranium Chloride Fluorides UF6-nClnand Methoxyuranium Fluorides UF6-n(OCH3)n: A Theoretical Study of Equilibrium Geometries, Vibrational Frequencies, and the Role of the f Orbitals

“…Similarly, Downs and Gardner 29 report two lines in this region of their UF 5 Cl spectrum, at 334 and 342 cm -1 , respectively (N 2 matrix). We attribute the extra lines to isotope effects with the higher frequency being, in each case, due to 35 Cl and the lower frequency to 37 Cl. This view is shared by Downs and Gardner.…”

“…Two years earlier, Vergamini had reported 34 the synthesis of the first member of the same series, UF 5 OCH 3 . The hexamethoxy derivative, U(OCH 3 ) 6 , has also been studied experimentally 35 ‡ Present address: Department of Computational Science and Engineering, CLRC Daresbury Laboratory, Daresbury, Warrington, Cheshire, U.K. WA4 4AD.…”

Electrochemical Synthesis, X-ray Single Crystal, IR Spectroscopic, and Quantum Chemical Investigation of Molybdenum and Tungsten Hexamethoxides

“…At the beginning of 1980s, the hexamethoxide complexes, M(OMe) 6 , of molybdenum, tungsten, − and uranium were already attracting considerable attention as comparably simple mononuclear molecular aggregates with octahedral symmetryuseful objects for development of theoretical approaches to modeling of vibration spectra. In the case of uranium, this research was of direct practical interest, since it was proposed to use U(OMe) 6 in the processes of isotope separation by means of laser-induced photochemical reduction .…”

“…The general synthetic approach to M(OMe) 6 described in the literature was based on low-temperature co-condensation of MF 6 with Si(OMe) 4 and proved to be technically rather complicated and unable to provide large quantities of the complexes under laboratory conditions. An alternative approach developed for U(OMe) 6 , and based on the oxidation of Li 2 U(OMe) 6 with lead tetraacetate, was obviously inapplicable to tungsten or molybdenum derivatives.…”