μ-Oxoverbrückte, dimere Technetium- und Rheniumkomplexe mit funktionalisierten Aminophenolato-Liganden. Darstellung und Strukturen von [OTcL1OL1TcO] · H2O und [OReL1OL1ReO] (H2L1 = N,N′-Bis(2-hydroxybenzyl)-1,3-diamino-2-(4-nitrobenzyl)propan)
作者： U. Abram , S. Abram , H. R. M�cke , P. Koch
关键词: Chemistry 、 X-ray crystallography 、 Octahedron 、 Stereochemistry 、 Medicinal chemistry 、 Amine gas treating 、 Rhenium 、 Crystal structure 、 Monoclinic crystal system 、 Ligand 、 Deprotonation
摘要: Ausgehend von [MOCl4]−-Komplexen werden mit dem vierzahnigen Amin-Phenolato-Liganden N,N-Bis(2-hydroxybenzyl)-1,3-diamino-2-4-nitrobenzyl)propan (H2L1) Rhenium(V)- und Technetium(V)-Chelate hergestellt strukturell charakterisiert. Es entstehen sauerstoffverbruckte, neutrale Zweikernkomplexe einer zentralen [OMOMO]4+-Einheit. Der Ligand koordiniert jeweils vierzahnig unter Deprotonierung der Phenolfunktionen. [OTcL1OL1TcO] · H2O kristallisiert monoklin in Raumgruppe P21/c a = 10,633(2); b 13,705(1); c 16,364(3) A; β 94,65(1)°; Z 2. Zwei TcOL1-Einheiten je einem terminalen Oxo-Liganden sind uber eine Sauerstoff-Brucke miteinander verknupft. Das Metall befindet sich verzerrt oktaedrischen Umgebung. Fur die TcO-Bindung nahezu linearen OTcOTcO-Einheit wurden zwei unterschiedliche Bindungsabstande bestimmt (TcO(terminal): 1,655(7) A TcO(Brucke): 1,903(1) A. Die analoge Rheniumverbindung gleichen 13,302(7); 9,956(1); 17,535(9) 106,72(2)°; das ebenfalls dimere Komplexmolekul [OReL1OL1ReO] konnten ahnliche Bindungsverhaltnisse wie fur sein Technetium-Analogon werden. Synthesis and Characterization of μ-oxo Dimeric Technetium Rhenium Complexes with Functionalized Amine Phenolate Ligands. X-Ray Crystal Structures [OTcL1OL1TcO] (H2L1 N,N′-bis(2-hydroxybenzyl)-1,3-diamino-2-(4-nitrobenzyl)propane) Neutral rhenium(V) technetium(V) chelates the tetradentate amine phenolate ligand N,N′-bis(2-hydroxybenzyl)-1,3-diamino-2(-4-nitrobenzyl)propane have been prepared from [MOCl4]− complexes structurally characterized. The coordinates tetradentately deprotonation phenolic oxygen atoms. [OTcL1OL1TcO] crystallizes monoclinic space group 10.633(2), 13.705(1), 16.364(3) 94.65(1)°, Two TcOL1 units each one terminal oxo core are connected by ligand. technetium atoms situated distorted octahedral coordination spheres. distinct TcO bond lengths found for almost linear OTcOTcO unit 1.655(7) TcO(μ-oxo): 1.903(1)) A. The analogous rhenium compound same 13.302(7), 9.956(1), 17.535(9) 106.72(2)°, dimeric complex has structure which is very similar to that corresponding compound.
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