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Two Polymorphs of Bis(4-methoxyphenyl)tellurium(IV) Diiodide
Farran José, Joan (Universitat Autònoma de Barcelona. Unitat de Cristal·lografia)
Alvarez Larena, Ángel (Universitat Autònoma de Barcelona. Unitat de Cristal·lografia)
Piniella, J. Francesc (Joan Francesc) (Universitat Autònoma de Barcelona. Unitat de Cristal·lografia)
Capparelli, Mario V. (Universitat Autònoma de Barcelona. Unitat de Cristal·lografia)
Germain, Gabriel (Université de Louvain. Unité de Chimie Physique Moléculaire et de Cristallographie)
Torres-Castellanos, Libardo (Universidad Nacional de Colombia. Departamento de Química)

Date: 1998
Abstract: The title compound, (C7H7O)2Tel2 (orC14H14I2O2Te), crystallizes in space group P1, either with Z = 8, (Ia), or Z = 4, (Ib). The six independent molecules [four in (Ia) and tow in (Ib)] have very similar structures. The geometry at the Te atoms is pseudo-trigonal bipyramidal, with the I atoms in the axial positions and the anisyl groups and the lone pair of electrons in the equatiorial plane. The Te-C and Te-I distances are in the ranges 2. 107(4)-2. 128(6) and 2. 8549 (10)-3. 0071(10) A, respectively. In both polymorphs, the molecules are associated via Te. . . I secondary bonds [3. 6922(6)-3. 9017(7)A] to form centrosymmetric tetramers in which the Te4I8 cores display step-like geometries. Including the secondary interactions, the coordination about each Te atom is distorted octahedral.
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; publishedVersion
Subject: Cristal·lografia ; Crystallography
Published in: Acta Crystallographica. Section C: Crystal Structure Communications, Vol. 54, Issue 7 (July 1998) , p. 995-1000, ISSN 0108-2701

DOI: 10.1107/S0108270197016387


6 p, 673.0 KB

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 Record created 2008-07-29, last modified 2019-02-10



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