Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Otto Kumberger"'
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Preparation and Crystal Structure of Zinc Bis[orotate(1–)] Octahydrate
Autor: Jürgen Riede, Otto Kumberger, Hubert Schmidbaur
Publikováno v: Zeitschrift für Naturforschung B. 48:961-964
A discrete zinc bis[orotate(1—)] complex of the composition Zn(OrH)2·8 H2O has been isolated and characterized by a single-crystal X-ray structure analysis. The crystals are monoclinic, space group P21/c (No. 14), Z = 2, a = 10.884(2), b = 12.896(
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb80fc501617982ed687ec272778c08a
https://doi.org/10.1515/znb-1993-0718
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4
Preparative, X‐ray, and NMR Studies of the Interaction of Beryllium with Salicylic and o ‐Cresotic Acid: Crystal Structures of (NH 4 ) 2 [Be(C 6 H 4 OCO 2 ) 2 ] · 2.25 H 2 O and Na 3 [Be(C 7 H 6 OCO 2 )(OH)(CO 3 )Be(C 7 H 6 OCO 2 )] · 8 H 2 O
Autor: Otto Kumberger, Hubert Schmidbaur
Publikováno v: Chemische Berichte. 126:3-9
The existence of well-defined crystalline beryllium salicylate(2 – ) and bis[salicylato(2 – )]beryllate complexes as well as of their o-cresotate analogs is established. The structure of (NH4)2[Be(C6H4OCO2)2] · 2.25 H2O has been determined by an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7f0ab89a93235379b788c212aeb7c5b8
https://doi.org/10.1002/cber.19931260102
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5
Beryllium Coordination to Bio-Ligands: Isolation from Aqueous Solution and Crystal Structure of a Hexanuclear Complex of Be2+ with Glycolic Acid, Na4[Be6(OCH2CO2)8]
Autor: Jürgen Riede, Otto Kumberger, Hubert Schmidbaur
Publikováno v: Zeitschrift für Naturforschung B. 47:1717-1720
Beryllium and its compounds are highly toxic to most living cells, but the mechanisms of the interference with the biological substrates on the molecular level is not understood. From observations in (attempted) chemotherapy of beryllium poisoning us
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7cc619bedec79e316700d9c5ed3f30f0
https://doi.org/10.1515/znb-1992-1212
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6
Orotate Complexes, II 1) Preparation and Crystal Structures of Calcium and Zinc Orotate(2‐) Hydrates
Autor: Hubert Schmidbaur, Jürgen Riede, Otto Kumberger
Publikováno v: Chemische Berichte. 124:2739-2742
From aqueous solutions containing orotate (dianion of 1) and calcium or zinc ions in the molar ratio of 2:1, metal orotate (2-) hydrates are readily obtained in crystalline form at pH 9.0 and 5.4, respectively. According to an X-ray crystal structure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71ec2868d92cabbe5bfee0da8a051941
https://doi.org/10.1002/cber.19911241215
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7
Modellsysteme für die Gallium-Extraktion, II / Model Systems for Gallium Extraction, II
Autor: Otto Kumberger, Joachim Lachmann, Gerhard Müller, Hubert Schmidbaur, Josef Lettenbauer
Publikováno v: Zeitschrift für Naturforschung B. 46:1065-1076
The introduction of a methyl substituent in the 2-position of 8-oxy-quinoline strongly alters its ligand properties in the complex formation with gallium(III). From aqueous solutions (ammonium acetate buffer, acetic acid, gallium nitrate) a pale-gree
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b85508d3469894c3034f2bb2549dcbbb
https://doi.org/10.1515/znb-1991-0816
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8
Modellsysteme für die Gallium-Extraktion, I. Struktur und Moleküldynamik von Aluminium- und Galliumtris(oxinaten) / Model Systems for Gallium Extraction, I. Structure and Molecular Dynamics of Aluminium and Gallium Tris(oxinates)
Autor: Gerhard Müller, Otto Kumberger, Josef Lettenbauer, Hubert Schmidbaur, Dallas L. Wilkinson
Publikováno v: Zeitschrift für Naturforschung B. 46:901-911
Tris(oxinato) complexes of aluminium(III) and gallium(III) have been prepared from 8-oxyquinoline (OxH) and its six C-methylated derivatives from aqueous solutions of the metal chlorides or nitrates and an ammonium acetate buffer. Crystalline monohyd
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12d49aa5fec54691b4cffe47883a8e99
https://doi.org/10.1515/znb-1991-0709
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9
Metal Bonding by Amino Acids: Preparation and Crystal Structures of Calcium Bis‐L‐pyroglutamate and Lithium L‐Pyroglutamate. Calcium bis‐L‐pyroglutamate and lithium L‐pyroglutamate are prepared by reaction of the metal hydroxides with L‐pyroglutamic acid in aqueous solution. In the solid state calcium bis‐L‐pyroglutamate adopts a layer structure, built up by sixteen‐membered rings consisting of four L‐pyroglutamate ligands bridging four calcium centers by their carboxylate groups. All three oxygen donors of the L‐pyroglutamate ligands are attached to metal centers. The calcium atom lies at the center of a slightly distorted octahedron formed by four carboxylate oxygens and two amide oxygen atoms. Lithium L‐pyroglutamate also features a layer structure. All three oxygen donors of the L‐pyroglutamate ligand have contacts with metal atoms. The coordination sphere of the lithium atom is a slightly distorted tetrahedron consisting of three carboxylate oxygen atoms and one amide oxygen atom. The investigation of aqueous solutions of the compounds by multinuclear NMR ( 1 H, 13 C, 17 O) indicates extensive electrolytic dissociation in dilute solutions
Autor: Jürgen Riede, Otto Kumberger, Paul Kiprof, Hubert Schmidbaur
Publikováno v: Chemische Berichte. 124:1083-1087
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dfbc359e7bcfa35b3ef6f06f00613318
https://doi.org/10.1002/cber.19911240515
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10
Cyclic dinuclear gold(I) complexes: The crystal structure of bis‐μ‐[(diphenylphosphino)(diphenylphosphinoselenoyl)methane]‐digold(I) bis(perchlorate)
Autor: Gerhard Müller, Hubert Schmidbaur, Jennifer Ebner Von Eschenbach, Otto Kumberger
Publikováno v: Chemische Berichte. 123:2261-2265
[(CO)AuCl] reacts with equimolar amounts of Ph2PCH2P(Se)Ph2 (dpmSe) to afford ClAuPh2PCH2P(Se)Ph2, in which dpmSe is bound to gold in a monodentate fashion by phosphorus. Subsequent reaction of this 1:1 complex with AgClO4 results in the formation of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae392487b218ba483bda7d41dd6663ab
https://doi.org/10.1002/cber.19901231206
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