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One‐Pot Synthesis and Structure of Organochalcogen Halides with Mixed Valence States
Author(s) -
Schulz Lang Ernesto,
Casagrande Gleison Antônio,
Manzoni de Oliveira Gelson,
Ledesma Gabriela Nanci,
Lemos Sebastião S.,
Castellano Eduardo Ernesto,
Abram Ulrich
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200500803
Subject(s) - chemistry , trihalide , intramolecular force , halide , halogen , tellurium , bromine , chalcogen , valence (chemistry) , thiourea , aryl , intermolecular force , crystallography , methanol , supramolecular chemistry , crystal structure , sulfur , inorganic chemistry , molecule , stereochemistry , organic chemistry , alkyl
Abstract Treatment of the diorganodichalcogenides PhEEPh (E = Se, Te) with one equivalent of elemental halogen (bromine or iodine) in methanol followed by addition of a sulfur donor and one more equivalent of the corresponding organochalcogen trihalide PhTeX 3 affords the mixed‐oxidation‐state organochalcogen halides [PhE II (L)PhE′ IV X 4 ] (E = Se, Te; E′ = Te; X = Br, I; L = thiourea, tetramethylthiourea) in a one‐pot procedure. The X‐ray structural analyses of these compounds suggest a strong dependence of the formation of supramolecular assemblies on the nature of the halogen bonded to the tellurium atom. The halogen can induce intramolecular and intermolecular secondary interactions among the heavy atoms simultaneously and, in addition to Te ··· X and X ··· X secondary bonds, intramolecular interactions of the type Te ··· η 6 ‐π‐aryl can be formed. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)