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Synthesis and Crystal Structures of Neutral Complexes of Tellurium(IV) – [PhTeX 3 L](X = Br, I; L = ethylenethiourea)
Author(s) -
Casagrande Gleison Antonio,
Schulz Lang Ernesto,
Tirloni Bárbara,
Burrow Robert Alan,
Manzoni de Oliveira Gelson,
Lemos Sebastião S.
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200600001
Subject(s) - tellurium , chemistry , halogen , halogenation , methanol , derivative (finance) , crystallography , medicinal chemistry , inorganic chemistry , organic chemistry , alkyl , financial economics , economics
A three‐step one‐pot synthetic procedure to synthesize the neutral tellurium(IV) coordination compounds PhTeX 3 L (X = Br, I and L = ethylenethiourea) has been developed and is described in this article. Oxidative halogenation of PhTeTePh in methanol generates the tellurium(II) derivative, PhTeX, which is subsequently complexed with ethylenethiourea, and, finally, further oxidative addition of additional halogen affords the corresponding tellurium(IV) compound PhTeX 3 L in good yields. The final product was obtained by the slow evaporation of the reaction mixture as black crystals. The X‐ray structural analyses of the compounds show Te···X and X···X secondary interactions in the solid state and suggest a weak dependence of the formation of supramolecular assemblies on the nature of the halogen bonded to the tellurium atom.