CHEMISTRY, SPECTROSCOPY, AND ISOTOPE-SELECTIVE INFRARED PHOTOCHEMISTRY OF A VOLATILE URANIUM COMPOUND TAILORED FOR 10- mu M ABSORPTION

U(OCH//3)//6.

Edward A. Cuellar, Steven S. Miller, Tobin J Marks, Eric Weitz

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This contribution reports on the chemical, vibrational spectroscopic, and infrared multiphoton photochemical properties of uranium hexamethoxide, U(OCH//3)//6, a prototype molecule for laser-induced uranium isotope separation with a carbon dioxide laser. Uranium hexamethoxide can be prepared from UCl//4 by conversion to Li//2U(OCH//3)//6, followed by oxidation with lead tetraacetate. Vapor pressure studies on U(OCH//3)//6 indicate that DELTA H//s//u//b degree equals 23 plus or minus 3 kcal/mol and DELTA S//s//u//b degree equals 76 plus or minus 4 eu; at 33 degree C, the vapor pressure is 17 mtorr. The vibrational spectra of U(**1**6OCH//3)//6 and U(**1**8OCH//3)//6 have been assigned by using infrared and laser Raman data. Under idealized O//h symmetry, the U(**1**6OCH//3)//6 U-O stretching fundamentals are assigned at 505. 0 (A//1//g), 464. 8 (T//1u), and 414. 0 cm** minus **1 (E//g). Tentative assignments are also made for several of the overtone and combination transitions evidence for possible lowering of the symmetry is presented.

Original languageEnglish
Pages (from-to)4580-4589
Number of pages10
JournalJournal of the American Chemical Society
Volume105
Issue number14
Publication statusPublished - Jan 1 1983

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Uranium Compounds
Uranium compounds
Photochemistry
Uranium
Photochemical reactions
Isotopes
Vapor Pressure
Spectrum Analysis
Spectroscopy
Infrared radiation
Vapor pressure
Lasers
Carbon dioxide lasers
Gas Lasers
Vibrational spectra
Stretching
Lead
Oxidation
Molecules

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

CHEMISTRY, SPECTROSCOPY, AND ISOTOPE-SELECTIVE INFRARED PHOTOCHEMISTRY OF A VOLATILE URANIUM COMPOUND TAILORED FOR 10- mu M ABSORPTION : U(OCH//3)//6. / Cuellar, Edward A.; Miller, Steven S.; Marks, Tobin J; Weitz, Eric.

In: Journal of the American Chemical Society, Vol. 105, No. 14, 01.01.1983, p. 4580-4589.

Research output: Contribution to journalArticle

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abstract = "This contribution reports on the chemical, vibrational spectroscopic, and infrared multiphoton photochemical properties of uranium hexamethoxide, U(OCH//3)//6, a prototype molecule for laser-induced uranium isotope separation with a carbon dioxide laser. Uranium hexamethoxide can be prepared from UCl//4 by conversion to Li//2U(OCH//3)//6, followed by oxidation with lead tetraacetate. Vapor pressure studies on U(OCH//3)//6 indicate that DELTA H//s//u//b degree equals 23 plus or minus 3 kcal/mol and DELTA S//s//u//b degree equals 76 plus or minus 4 eu; at 33 degree C, the vapor pressure is 17 mtorr. The vibrational spectra of U(**1**6OCH//3)//6 and U(**1**8OCH//3)//6 have been assigned by using infrared and laser Raman data. Under idealized O//h symmetry, the U(**1**6OCH//3)//6 U-O stretching fundamentals are assigned at 505. 0 (A//1//g), 464. 8 (T//1u), and 414. 0 cm** minus **1 (E//g). Tentative assignments are also made for several of the overtone and combination transitions evidence for possible lowering of the symmetry is presented.",
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