Showing papers by "Heinz Gornitzka published in 2000"
TL;DR: Bis(trimesitylgermyl carbodiimido)germylene (1), isolated as a white precipitate from the reaction of lithium trimesity lgermylscyanamide with dichlorogermylene, is stable at room temperature in the absence of water and oxygen as discussed by the authors.
31 citations
TL;DR: In this article, the pentadentate ligand bis[1,1-di(2-pyridyl)ethyl]amine (BDPEA) is complexed with cobalt(II) salts, leading to novel Co(II)/Co(III) mixed-valence complexes.
Abstract: The complexation of the pentadentate ligand bis[1,1-di(2-pyridyl)ethyl]amine (BDPEA),
by cobalt(II) salts leads to novel Co(II)/Co(III) mixed-valence complexes: the
secondary amine of the starting BDPEA is deprotonated, leading to a dinucleating bridging amido ligand.
15 citations
2 citations
TL;DR: A new tetrapyridyl ligand (BDPEA) and the corresponding di-iron(III) μ-oxo complex were synthesized in this article, with monopersulfate as oxidant, which catalyzed the conversion of 2,4,6 trichlorophenol and catechol.
Abstract: A new tetrapyridyl ligand (BDPEA) and the corresponding di-iron(III) μ-oxo complex were synthesized. The iron complex structure, determined by X-ray crystallography, exhibited the dinuclear core [Fe2III(BDPEA)2(μ-O)(NO3)2](NO3)2 (1). With monopersulfate as oxidant, this complex catalyzed the conversion of 2,4,6-trichlorophenol and catechol, with a better activity and an enhanced life-time compared to the previously reported complex [FeIII(BDPMA)](NO3)3 (2) (BDPMA: bis[di(2-pyridyl)methyl]amine) which contained two fragile benzylic C–H bonds on the tetrapyridyl ligand.
TL;DR: Bis(trimesitylgermyl carbodiimido)germylene (1), isolated as a white precipitate from the reaction of lithium trimesity lgermylscyanamide with dichlorogermylene, is stable at room temperature in the absence of water and oxygen.
Abstract: Bis(trimesitylgermylcarbodiimido)germylene (1), isolated as a white precipitate from the reaction of lithium trimesitylgermylcyanamide with dichlorogermylene, is stable at room temperature in the absence of water and oxygen. The germylene structure is preserved in the reaction with 3,5-di-t-butylcatechol, while subsequent addition to 3,5-di-t-butylorthoquinone gave the corresponding spirogermane. Thermal decomposition of 1 occurs around 50°C leading to bis(trimesitylgermyl)carbodiimide and polycarbodiimidogermylene. Hydrolysis of 1 gave the corresponding monogermylated derivative of cyanamide (3) in two isomeric forms: trimesitylgermylcyanamide (3a) and trimesitylgermylcarbodimide (3b), in equilibrium in solution. Isomer 3b is the first compound to precipitate from a benzene solution. Its structure was established by X-ray diffraction. Compound 3 decomposes on heating to form dicyanamide and bis(trimesitylgermyl)carbodiimide.