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Chlorination and Bromination of Dialkyl Tellurides
Author(s) -
Klapötke Thomas M.,
Krumm Burkhard,
Mayer Peter,
Piotrowski Holger,
Ruscitti Oliver P.
Publication year - 2002
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 - 10.1002/1521-3749(200201)628:1<229::aid-zaac229>3.0.co;2-4
Subject(s) - halogenation , chemistry , organic chemistry
The reactions of dialkyl tellurides R 2 Te (R = C 2 H 5 , n ‐C 3 H 7 , i ‐C 3 H 7 , c ‐C 6 H 11 ) with sulfuryl chloride and bromine were examined. The dialkyltellurium(IV) dichlorides (C 2 H 5 ) 2 TeCl 2 ( 1 ), ( n ‐C 3 H 7 ) 2 TeCl 2 ( 2 ), ( i ‐C 3 H 7 ) 2 TeCl 2 ( 3 ) and ( c ‐C 6 H 11 ) 2 TeCl 2 ( 4 ) were obtained upon reaction with stoichiometric amounts of SO 2 Cl 2 . Excess of SO 2 Cl 2 resulted in formation of mixtures of R 2 TeCl 2 and RTeCl 3 . Treatment of (C 2 H 5 ) 2 Te and ( n ‐C 3 H 7 ) 2 Te with excess bromine gave the dialkyltellurium(IV) dibromides (C 2 H 5 ) 2 TeBr 2 ( 5 ) and ( n ‐C 3 H 7 ) 2 TeBr 2 ( 6 ), whereas ( i ‐C 3 H 7 ) 2 Te and ( c ‐C 6 H 11 ) 2 Te yielded the alkyltellurium(IV) tribromides i ‐C 3 H 7 TeBr 3 ( 7 ) and c ‐C 6 H 11 TeBr 3 ( 8 ). Equimolar amounts of bromine resulted in mixtures of R 2 Te and RTeBr 3 . All products were identified and characterized by analytical and spectroscopic methods. n ‐Propyl tellurium tribromide ( 9 ) was detected from a solution of the dibromide 6 after prolonged periods. The crystal structures of 7 , 8 and 9 were determined.