Structures and Properties of Novel Mononuclear Iron(III) Complexes with Benzimidazole Containing Tripodal Tetradentate Ligands

Autor: Florian Schweppe, Andreas Wiedemann, Kristin Zurlinden, Bernt Krebs, Matthias Pascaly, Cetin Nazikkol
Rok vydání: 2000
Předmět:
Zdroj: Zeitschrift für anorganische und allgemeine Chemie. 626:50-55
ISSN: 1521-3749
0044-2313
DOI: 10.1002/(sici)1521-3749(200001)626:1<50::aid-zaac50>3.0.co;2-y
Popis: The iron(III) complexes of the tripodal benzimidazole-containing ligands tris(2-benzimidazolylmethyl)amine (ntb), bis(2-benzimidazolylmethyl)(2-hydroxyethyl)-amine (bbimae) and tris(5,6-dimethyl-2-benzimidazolylmethyl)amine (me2ntb) are structural and functional models for intradiol cleaving catechol dioxygenases. The complexes [Fe(ntb)Cl2]Cl · 3 CH3OH (1; P 1, a = 9.830(2) A, b = 12.542(3) A, c = 13.139(3) A, α = 82.88(3)°, β = 73.45(3)°, γ = 85.53(3)°, V = 1539.2(6) A3; Z = 2) and [Fe(bbimae)Cl2]Cl (2; P21/n, a = 7.461(2) A, b = 18.994(5) A, c = 14.515(4) A, β = 98.22(2)°, V = 2035.8(9) A3, Z = 4) have been characterized by X-ray crystallography and spectroscopic methods. In the octahedrally coordinated complexes two cis coordination sites – essential for catechol binding – are occupied by chloride ligands. The significant intradiol cleaving catechol dioxygenase activity of the model complexes was examined using 3,5-di-tert-butylcatechol as a substrate.
Databáze: OpenAIRE
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