Nitrogen-rich compounds of the actinoids: Dioxouranium(VI) 5,5'-Azobis[tetrazolide] Pentahydrate and Its unusually small uranyl angle

Autor(en)

Georg Steinhauser, Gerald Giester, Christoph Wagner, Peter Weinberger, Bernahrd Zachhuber, Georg Ramer, Mario Villa, Bernhard Lendl

Abstrakt

Uranyl(VI) 5,5'-azobis[tetrazolide] pentahydrate was synthesized and characterized using X-ray crystallog., elemental anal., UV/vis, MIR, FIR, and Raman spectroscopy. It is the second-most nitrogen rich compd. of uranium (26.72 wt % N) and only the second structurally characterized uranium complex with a tetrazole ligand described in the literature. The compd.'s structure is characterized by an exceptionally small uranyl angle of 172.4(1)°, which provides information on the coordination properties of tetrazole ligands as they affect the donor's environment by strong steric and perhaps electrostatic repulsion. The compd. showed luminescence under excitation with a near UV laser. The mean lifetime of its excited state was shorter than in the case of UO2(NO3)2·6H2O, indicating quenching by the ligand. Despite its high nitrogen content (and thus potentially explosive character), the title compd. proved to be stable even under neutron radiation causing induced fission processes.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Technische Universität Wien

Journal

Inorganic Chemistry

Band

51

Seiten

6739-6745

Anzahl der Seiten

7

ISSN

0020-1669

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

105113 Kristallographie, 104015 Organische Chemie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/5376fd73-9eaf-4e7b-ab4e-4d46142c4817