Tetraalkylammonium uranyl isothiocyanates

Clare E. Rowland, Mercouri G. Kanatzidis, L. Soderholm

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Three tetraalkylammonium uranyl isothiocyanates, [(CH 3) 4N] 3UO 2(NCS) 5 (1), [(C 2H 5) 4N] 3UO 2(NCS) 5 (2), and [(C 3H 7) 4N] 3UO 2(NCS) 5 (3), have been synthesized from aqueous solution and their structures determined by single-crystal X-ray diffraction. All of the compounds consist of the uranyl cation equatorially coordinated to five N-bound thiocyanate ligands, UO 2(NCS) 5 3-, and charge-balanced by three tetraalkylammonium cations. Raman spectroscopy data have been collected on compounds 1-3, as well as on solutions of uranyl nitrate with increasing levels of sodium thiocyanate. By tracking the Raman signatures of thiocyanate, the presence of both free and bound thiocyanate is confirmed in solution. The shift in the Raman signal of the uranyl symmetric stretching mode suggests the formation of higher-order uranyl thiocyanate complexes in solution, while the solid-state Raman data support homoleptic isothiocyanate coordination about the uranyl cation. Presented here are the syntheses and crystal structures of 1-3, pertinent Raman spectra, and a discussion regarding the relationship of these isothiocyanates to previously described uranyl halide phases, UO 2X 4 2-.

Original languageEnglish
Pages (from-to)11798-11804
Number of pages7
JournalInorganic Chemistry
Volume51
Issue number21
DOIs
Publication statusPublished - Nov 5 2012

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Tetraalkylammonium uranyl isothiocyanates'. Together they form a unique fingerprint.

  • Cite this