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

ASJC Scopus subject areas

  • Chemistry(all)

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