Dioxouranium(VI) complexes with N₂O₂ chelating thiosemicarbazones [UO₂L(R-OH)]

Abstract

Three alkylated thiosemicarbazones (1–3) substituted on sulfur were synthesized using 5-bromosalicylaldehyde as starting material. The template reactions of the S-alkyl-thiosemicarbazones in the presence of dioxouranium(VI) were investigated. Six dioxouranium(VI) (1a–3b) complexes were synthesized. Propyl or allyl alcohol used as second ligand completed the seventh coordination site of . The synthesized thiosemicarbazones and template complexes were characterized by elemental analysis, UV-visible, FTIR, and ¹H NMR. The structure of the dioxouranium(VI) complex, [UO₂L(allylalcohol)], was studied by single-crystal diffraction. The uranium is seven-coordinate in a pentagonal-bipyramidal arrangement with two oxo groups occupying the apical positions.

Keywords:

• Template synthesis
• Dioxouranium(VI)
• Thiosemicarbazones
• X-ray diffraction

Acknowledgment

This work was supported by the Scientific Research Projects Coordination Unit of Istanbul University (Project No: T14/15122006 and BYP-12214).

Supplementary material

CCDC 815247 contains the supplementary crystallographic data for the structure reported in this article. These data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html, or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; Fax: [phone]; or E-mail: [email protected].