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Dinukleare Titankomplexe des Thiacalix[4]arens
Author(s) -
Zeller Jürgen,
Treptow Jens,
Radius Udo
Publication year - 2007
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.200600373
Subject(s) - ligand (biochemistry) , chemistry , crystallography , metal , stereochemistry , substitution reaction , medicinal chemistry , receptor , organic chemistry , biochemistry
Abstract Dinuclear Titanium Complexes of Thiacalix[4]arene The reaction of [TiCl 4 (THF) 2 ] with thiacalix[4]arene (H 4 TCA) affords almost insoluble [TCA{TiCl 2 (THF)} 2 ] ( 1 ). Single crystal X‐ray analysis reveals that the thiacalix[4]arene ligand coordinates at least in a part of the reaction product in an 1,2‐alternate cone conformation and that the metal atoms are therefore arranged in opposite directions with respect to a plane through the sulfur atoms of the ligand ( anti ‐configuration). The use of [Ti 2 (acac) 4 (μ‐O) 2 ] as starting material causes the formation of the soluble homodinuclear complex [TCA{Ti(acac)} 2 (μ–O)] ( 2 ) in good yields, in which the thiacalix[4]arene ligand adopts a cone conformation and the metal atoms are thus arranged in syn ‐configuration. Reaction of 2 with 8‐hydroxyquinoline leads to substitution of the acetylacetonato ligands of 2 under formation of crystallographically characterized [TCA{Ti(OC 9 H 5 N)} 2 (μ–O)] ( 3 ).