Synthesis and crystal structure of tetra(quinolin-8-olato)thorium ethanol solvate, Th(C9H6NO)4*C2H5OH

Authors

  • Holger Kohlmann Saarland University FR 8.1 – Inorganic Solid State Chemistry, Am Markt, Zeile 3, 66125 Saarbrücken, Germany

DOI:

https://doi.org/10.13171/mjc.1.1.2011.27.05.13

Abstract

Metal quinolinolates (also known as oxinates) have been widely used for gravimetric analysis and in recent days as materials for organic light emitting diodes (OLEDs). Recrystallisation of tetra(quinolin-8-olato)thorium(IV) (ThQ4) yielded yellow, translucent, prismatic crystals of the title compound, ThQ4*C2H5OH, the single-crystal structure of which is described. Only one crystallographically distinct molecule is found, all ligands are crystallographically inequivalent. Thorium is coordinated by four 8-hydroxyquinolinato with average Th-O distances of 233.3 pm and average Th-N distances of 272.4 pm, and one ethanol ligand with a Th-O distance 256.7 pm. O and N surroundings around thorium can be described by a tricapped trigonal prism. In contrast to quinolinates of the trivalent metals, ThQ4*C2H5OH does not fluoresce under UV irradiation, which is in accordance with the lack of π-π overlap in the crystal structure.

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Published

2011-05-27

Issue

Vol. 1 No. 1 (2011)

Section

Inorganic Chemistry

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