Die Herstellung und einige physikalisch-chemische Eigenschaften von Modifikationen des Dipyridin-Dirhodankupfer(II)-Komplexes

The paper deals with the preparation of modifications of Cu(Py)₂(CNS)₂ from aqueous media. The -from was obtained by precipitation of pyridine containing solutions of CuSO₄ with NH₄CNS, while for the -modification crystallisation from solutions was applied that in addition to the above components contained also ammonia. The differences betwwen the modifications are discussed on the basis of their infra-red spectra, their thermograms and their powder-diffractograms. The structural differences are localized in the inner coordination sphere of the central atom. Besides, also the properties of some products of the thermal decomposition of these modifications are reported.

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Darstellung,Eigenschaften und Molekülstruktur eines Titan-tris(diazadien)-Komplexes

Preparation, Properties, and Molecular Structure of a Titanium-tris(diazadiene) Complex (R = i-C₃H₇) 1 was obtained by reaction of TiCl₄ · 2 THF with Li₂(NR? CH = CH? NR) in the presence of the ligand molecules. The compound was characterized by ¹H-, ¹³C-n.m.r., and mass spectroscopy. The molecular structure was determined by X-ray diffraction. The bonding distances in the identically coordinated diazadiene ligands are similar to those of radical.     

Das polarographische Verhalten des Tris-(1,10-Phenanthrolin)-Kobalt(III)-Komplexes und des 1,10-Phenanthrolin-Kobalt(I)-Komplexes

Ohne Zusammenfassung     

Die Kristallstruktur eines 1:2-Chrom(III)-Komplexes vom Sandwichtypus

The crystal structure of the triclinic modification of the 1:2 complex of chromium-(III) with the azo dye from 3-methyl-anthranilic acid with 1-(4-bromophenyl)-3-methyl-5-pyrazolone has been determined. The space group is P1 with a = 13,46 Å, b = 14,79 Å, c = 12,56 Å, α = 62°30′, β = 106°51′ and γ = 98°25′. The structure was solved by the heavy atom technique and refined by blockdiagonal least squares method. The sandwich configuration postulated by SCHETTY [1] was confirmed.     

Synthese und Struktur eines zweikernigen Gadolinium(III)-Komplexes: Magnetische Austauschwechselwirkungen in alkoxyverbrückten Komplexen der Lanthanoiden

Synthesis and Structure of a Binuclear Gadolinium(III) Complex: Magnetic Exchange Interactions in Alkoxy Bridged Lanthanide Complexes The Schiff Base ligand N-salicylidene-2-(bis-(2-hydroxyethyl)amino)ethylamine (H₃sabhea) reacts with Gd(NO₃)₃ · 6 H₂O in methanol solution to yield the alkoxy bridged binuclear gadolinium(III) complex [{Gd(Hsabhea)(NO₃)}₂] · 2MeOH ( 1 ). 1 crystallizes in the monoclinic space group P2₁/c with a = 1014.8(2), b = 2059.2(4), c = 867.5(2) pm, β = 106.72(2)°, and Z = 2. The two gadolinium atoms are bridged by two alkoxide oxygen atoms with angles of 107.60(11)° at the oxygen bridgeheads and a Gd? Gd separation of 376.43(7) pm. A variable-temperature magnetic susceptibility study (2 to 280 K) of 1 revealed an antiferromagnetic coupling between the Gd(III) ions with J = ?0.198 cm^?1 (g = 1.975).