Publication Type Journal Article
Title Uranium(III, IV) and thorium(IV) pyrazolylmethane complexes: Synthesis and structures
Authors José M. Carretas Jinlan Cui Isabel Cordeiro Santos Adelaide Cruz Leonor Maria Joaquim Marçalo
Groups IOARC
Journal INORGANICA CHIMICA ACTA
Year 2012
Month April
Volume 385
Number
Pages 53-57
Abstract Reactions of UI3(THF)(4), UCl4 and ThCl4 with 1 equiv. of tris(3,5-dimethylpyrazolyl)methane (Tpm*) in THF led to the formation of the complexes [U(Tpm*)I-3(THF)] (1), [U(Tpm*)Cl-4] (2) and [Th(Tpm*)Cl-4] (3) in good yields. The NMR spectra indicated symmetrical structures in solution, with equivalent pyrazolyl groups of the Tpm* ligand. The X-ray crystal structures of the three complexes were determined and in all cases the metallic centre is seven-coordinated, presenting distorted capped octahedral coordination geometry with near C-3v symmetry. In 1, the tridentate pyrazolylmethane ligand and the three iodine atoms define the two staggered triangular faces of the octahedron, respectively, and the latter is capped by the THF oxygen. In 2 and 3, the coordination geometry is similar, with three chlorine atoms defining a triangular face capped by the fourth chlorine. (C) 2011 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.ica.2011.12.033
ISBN
Publisher
Book Title
ISSN 0020-1693
EISSN
Conference Name
Bibtex ID ISI:000301455100008
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