Koordinativ ungesättigte Eisen-Chalkogenolat-Komplexe mit trigonalplanaren Ligandensphären – Synthese, Eigenschaften und Reaktionen mit Stickstoff- und Sauerstoff-Donormolekülen
作者:Ralf Hauptmann、Rainer Kliß、Jörg Schneider、Gerald Henkel
DOI:10.1002/(sici)1521-3749(1998110)624:11<1927::aid-zaac1927>3.3.co;2-g
日期:1998.11
The new bulky organo-selenium compound 2,4,6-triphenylbenzeneselenole (1A) was synthesized by a multistep-reaction from 1,3,5-triphenylbenzene. 1A was converted by oxidation into the air-stable bis(2,4,6-triphenylphenyl)diselenide (1B), which was characterized by X-ray diffraction. The stepwise reaction of [Fe-2N(SiMe3)(2)}(4)] with 1A leads to the complexes [Fe-2(SeC6H2-2,4,6-Ph-3)(2)N(SiMe3)(2)}(2)] (2) and [Fe2(SeC6H2-2,4,6-Ph3)4] (3), controlled by their molar ratios. The conversion of 2 to 3 is also described. In addition, the coordinatively unsaturated thiolate complexes [Fe-2SC6H3-2,6-(SiMe3)(2)}(2)N(SiMe3)(2)}(2)] (4) and [Fe-2SC6H3- 2,6-(SiMe3)(2)}(4)] (5) were synthesized by stepwise reaction of [Fe-2N(SiMe3)(2)}(4)] with 2,6-bis(trimethylsilyl)benzenethiole. It is also possible to convert the heteroleptic compound 4 into the homoleptic thiolate complex 5. During our investigations of the reactivity of 5 towards small electroneutral molecules, the compounds [Fez(SC6H3-2,6-(SiMe3)2)4. (MeCN)(2)] (6) and [FeSC6H3-2,6-(SiMe3)(2)}(2)(OPEt3)] (7) were obtained. 6 is the product of the addition of two molecules of acetonitrile to 5. The iron atoms of 6 are coordinated by three sulfur and one nitrogen atom in a distorted tetrahedral manner. When 5 is treated with triethylphosphine oxide instead of acetonitrile, the mononuclear complex 7 with the coordination number three is formed. The iron atom is surrounded by two sulfur and one oxygen donor functions.