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- W1975016851 abstract "Die Molekülstrukturen zweier Komplexe von di- bzw. monoprotoniertem N-(Pyrid-2-ylmethyl)ethylendiamin-N,N′,N′-triacetat (pedta3−) mit CuII bzw. FeIII als Zentralatome wurden durch Röntgenkristallstrukturanalyse bestimmt. Beide Komplexe haben eine verzerrt oktaedrische Koordination, in der H2pedta− bzw. Hpedta2− als fünfzähnige Liganden wirken. Die sechste Koordinationsstelle wird durch ein Chlorid-Ion besetzt. Die unterschiedliche Oxidationsstufe der Zentralatome führt zu einem unterschiedlichen Koordinationsverhalten der Carboxylgruppen. In beiden Komplexen ist eine der CH2COOH-Gruppen unkoordiniert. Im FeIII-Komplex erfolgt die Koordination über die hydroxylischen O-Atome der deprotonierten Carboxylgruppen. Im Gegensatz dazu beobachtet man im CuII-Komplex Koordination über die carbonylischen O-Atome, wobei eine der beiden Carboxylgruppen protoniert und die andere deprotoniert vorliegt. Von allen protonierten Carboxylgruppen in beiden Komplexen gehen intermolekulare Wasserstoffbrückenbindungen aus. Molecular Structures of Copper(II) and Iron(III) Chloro Complexes with di- and monoprotonated N-(pyrid-2-ylmethyl)ethylenediamine-N,N′,N′-triacetate (H2pedta−; Hpedta2−) The molecular structures of two complexes of di- and monoprotonated N-(pyrid-2-ylmethyl)ethylenediamine-N,N′,N′ -triacetate (pedta3−) with CuII and FeIII as central atoms have been determined by single crystal X-ray diffraction methods. Both complexes have a distorted octahedral coordination with H2pedta− and Hpedta2− as pentadentate ligands and a chloride ion occupying the sixth coordination site. The different oxidation states of the central atoms result in a completely different coordination behaviour of the carboxyl groups. In both complexes one of the CH2COOH groups is uncoordinated. In the FeIII complex, the central atom is coordinated by the hydroxylic O atoms of the deprotonated carboxyl groups. Contrary to this in the CuII complex, the central atom is coordinated by the carbonylic O atoms. One of the coordinated carboxyl groups is protonated and the other is deprotonated. All protonated carboxyl groups in both complexes form intermolecular hydrogen bonds." @default.
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- W1975016851 date "1996-04-01" @default.
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- W1975016851 title "Molek�lstrukturen von Kupfer(II)- und Eisen(III)-Chlorokomplexen mit di- und monoprotoniertem N-(Pyrid-2-ylmethyl)ethylendiamin-N,N?,N?-triacetat (H2pedta?; Hpedta2?)" @default.
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- W1975016851 doi "https://doi.org/10.1002/zaac.19966220423" @default.
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