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  • Articles: DFG German National Licenses  (65)
  • 1985-1989  (41)
  • 1970-1974  (24)
  • Inorganic Chemistry  (65)
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Low-Temperature Synthesis of Oxyhalides, YOX (X = Cl, Br, I), as the Source of Impurity in the Preparation of Trihalides, YX3, via the Ammonium Halide Route. Analogy of YOCl and YSClAmmonium halides, NH4X (X = Cl, Br, I), react with Y2O3 and Y2S3, respectively, at temperatures as low as 230=C (X = Cl), 280=C (Br), and 360=C (I) (molar ratio 12:1) to yield (NH4)3YX6, NH3, and H2O (H2S). The choice of smaller ratios than 12:1 (for example 2:1) results in the formation of oxyhalides, YOX, via the reaction of (NH4)3YX6 with surplus Y2O3. This reaction is therefore the actual source of impurity of rare-earth trihalides in their preparation via the ammonium halide routes.
    Notes: Ammoniumhalogenide, NH4X (X = Cl, Br, I), reagieren mit Y2O3 bzw. Y2S3 (im molaren Verhältnis 12:1) bereits bei Temperaturen um 230°C (X = Cl), 280°C (Br) bzw. 360°C (I) unter Bildung von (NH4)3YX6, NH3 und H2O (H2S). Wird das Verhältnis NH4X:Y2O3 kleiner als 12:1 gewählt (z. B. 2:1), so entstehen Oxidhalogenide YOX durch Reaktion von (NH4)3YX6 mit „überschüssigem“ Y2O3. Diese Reaktion ist somit die Quelle der Verunreinigungen von Selten-Erd-Halogeniden durch Oxidhalogenide bei ihrer Gewinnung nach der Ammoniumhalogenid-Methode.
    Additional Material: 2 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 533 (1986), S. 181-185 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Oxychlorides under Reducing Conditions: Single Crystals of NdOCl and GdOClSingle crystals of NdOCl and GdOCl are obtained in metallothermic reduction reactions of NdCl3 and GdCl3, respectively, with sodium due to ubiquitous oxidic impurities by crystallization from the melt. The crystal structures of NdOCl [a = 402.49(2), c = 678.37(5) pm] and GdOCl [a = 394.95(3), c = 667.08(7) pm], both PbFCl structure type (P4/nmm, Z = 2) were refined.
    Notes: Bei der metallothermischen Reduktion von NdCl3 bzw. GdCl3 mit Natrium werden, durch kaum vermeidbare oxydische Verunreinigungen bedingt, Einkristalle von NdOCl bzw. GdOCl durch Kristallisation aus der Schmelze erhalten. Die Kristallstrukturen (PbFCl-Typ, P4/nmm, Z = 2) wurden verfeinert. Es ist: a = 402,49(2); c = 678,37(5) pm (NdOCl) und a = 394,95(3); c = 667,08(7) pm (GdOCl).
    Additional Material: 1 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 408 (1974), S. 15-20 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Notice on the Magnetic Behaviour of Li3CrO4Li3CrO4, a smaragd green powder, is due to powder photographs (Guinier-Simon-technique) isotypic with orthorhombic HT—Li3PO4, a = 6.309, b = 10.851, c = 4.952 Å, Z = 4. Between 298 and 10K the Curie-Weiss-Law is obeyed with μ=1.60 B.M. and Θ=+10 K. Below 5 K ferromagnetism is observed. ESR measurements at 4.2 K and more pronounced at 1.8 K show anisotropy of the ligand field.
    Notes: Li3CrO4, ein smaragdgrünes Pulver, ist nach Guinier-Simon-Aufnahmen isotyp mit HT-Li3PO4, a = 6,309 Å, b = 10,851 Å, c = 4,952 Å, Z = 4. Zwischen 298 und 10 K wird das Curie-Weisssche Gesetz mit μ=1,60 B.M., Θ=+10K befolgt. Unterhalb von 5 K tritt überraschend Ferromagnetismus auf. ESR-Messungen bei 4,2 K und ausgeprägter bei 1,8 K zeigen eine Anisotropie des Ligandenfeldes.
    Additional Material: 5 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 408 (1974), S. 275-282 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Dinitrito Cobalt(III) Complexes. I. Preparation and Absorption Spectra of Di(ethylenediamine) Cobalt(III) PerchloratesCis and trans dinitrito diethylenediamine cobalt perchlorates could be prepared starting with carbonato and trans dichloro ethylenediamine cobalt perchlorate. Spectroscopic data are reported and compared with those of the corresponding dinitro complexes.
    Notes: Ausgehend von Carbonato- und trans-Dichloro-diäthylendiaminkobalt(III)-perchlorat konnten cis- und trans-Dinitrito-diäthylendiamin-kobalt(III)-perchlorate dargestellt werden. Ihre Spektren im sichtbaren Gebiet und UV werden mitgeteilt und mit den Spektren der entsprechenden Dinitrokomplexe verglichen.
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 528 (1985), S. 55-60 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Divalent Neodymium: NdCl2 and KNd2Cl5Single crystals of NdCl2 have been obtained via metallothermic reduction of NdCl3 with lithium: a = 908.49(5), b = 761.47(5), c = 455.62(2) pm, Pbnm, Z = 4, PbCl2 type, refined to R = 0.047. Reduction of NdCl3 with potassium yields KNd2Cl5: a = 894.51(9), b = 785.16(7), c = 1 265.28(13) pm, β = 90.000(8)°, P21/c, Z = 4, isotypic with TlPb2Cl5. There is a close structural relationship of KNd2Cl5 with K2NdCl5.
    Notes: Bei der „metallothermischen Reduktion“ von NdCl3 mit Lithium werden Einkristalle von NdCl2 erhalten: a = 908,49(5); b = 761,47(5); c = 455,62(2) pm; Pbnm, Z = 4, PbCl2-Typ, Verfeinerung bis R = 0,047. Kalium reduziert NdCl3 unter Bildung von KNd2Cl5: a = 894,51(9); b = 785,16(7); c = 1265,28(13) pm; β = 90,000(8)°, P21/c, Z = 4, isotyp mit TlPb2Cl5. Es besteht eine enge strukturelle Verwandtschaft mit K2NdCl5.
    Additional Material: 1 Ill.
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  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Dinitrito Cobalt(III) Complexes. II. Kinetics of Isomerisation and Reaction of Cis and Trans Dinitrito Di(ethylenediamine) Cobalt(III) Perchlorates with Hydrazoic AcidAfter a reinvestigation of the kinetic data of the nitrito-nitro isomerisation of cis and trans dinitrito-di(ethylenediamine) cobaltic perchlorate, the kinetics of the reactions between both coordination compounds and hydrazoic acid, to yield the diaquo compounds, nitrogen and dinitrogen oxide, has been studied by gasvolumetric measurements in the temperature range from 1 to 15°C. In azide buffer solutions both reactions proceed independently of pH, in two stages bimolecular with regard to the complex ion and hydrazoicacid. In both cases the first stage velocity constant is five times greater than the second constant. The cis-compounds react approximately three times faster than the trans-compounds. Possible reasons for the observed facts are discussed.
    Notes: Nach nochmaliger Ermittlung der kinetischen Daten der Nitritonitro-Isomerisierung von cis- bzw. trans-Dinitrito-di(äthylendiamin)-kobalt(III)-perchlorat wurde die Kinetik der Umsetzung der beiden Komplexverbindungen mit Stickstoffwasserstoffsäure zu den Diaquo-di(äthylendiamin)-Komplexen, Stickstoff und Distickstoffmonooxid gasvolumetrisch im Temperaturbereich von 1—15°C untersucht. In Azidpufferlösungen verlaufen die Reaktionen unabhängig vom pH in zwei Stufen bimolekular in bezug auf das jeweils vorliegende Komplexion und Stickstoffwasserstoffsäure, wobei die erste Geschwindigkeitskonstante etwa fünfmal größer ist als die zweite. Die cis-Verbindungen reagieren in beiden Stufen etwa dreimal rascher als die trans-Komplexe. Mögliche Gründe für diese Beobachtungen werden diskutiert.
    Additional Material: 3 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 524 (1985), S. 90-94 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chlorotitanates (II): RbTiCl3 and CsTiCl3RbTiCl3 and CsTiCl3 are obtained as shiny black single crystals by synproportionation of appropriate amounts of RbCl (CsCl), Ti and TiCl3 in sealed tantalum containers (700°C, 3 d, cooled down with 2 deg/h). The structure determination from single crystal data confirms the assumed isotypism with CsNiCl3 (hexagonal, P63/mmc, Z = 2; RbTiCl3: a = 711.73(4), c = 599.96(11) pm; CsTiCl3: a = 730.18(11), c = 605.3(3) pm).
    Notes: RbTiCl3 und CsTiCl3 erhält man in Form glänzend schwarzer Einkristalle bei der Synproportionierung entsprechender Gemenge von RbCl (CsCl), Ti und TiCl3 in verschweißten Tantalampullen (700°C, 3 d, dann Abkühlen mit 2°/h). Die Strukturbestimmung an Einkristallen belegt die Isotypie mit CsNiCl3 (hexagonal, P63/mmc, Z = 2; RbTiCl3: a = 711.73(4); c = 599,96(11) pm; CsTiCl3: a = 730,18(11); c = 605.3(3) pm).
    Additional Material: 1 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 521 (1985), S. 161-172 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ternary Rare-Earth Halides of the A2MX5 Type (A = K, In, NH4, Rb, Cs; X = Cl, Br, I)Ternary rare-earth (=M) chlorides, bromides, and iodides In2MCl5, (NH4)2MCl5, Rb2MCl5, Cs2MCl5, CsRbMCl5, K2MBr5, Rb2MBr5, K2MI5, and Rb2MI5 have been synthesized. Single crystals of In2PrCl5, Rb2PrCl5, K2PrBr5, and K2PrI5 were grown and the structures refined. The other halides were characterized by x-ray powder patterns. They are isotypic either with K2PrCl5(orthorhombic, Pnma, Z = 4, hexagonal arrangement of chains of edge-connected polyhedra [PrX7]) or with Cs2DyCl5 (orthorhombic, Pbnm, Z = 4, hexagonal arrangement of cis-corner-connected octahedra [DyCl6]) which may be discriminated in structure field diagrams. The thermal expansion was investigated für Cs2LuCl5 and Rb2PrX5 (X = Cl, Br, I).
    Notes: Die Halogenide sind entweder mit K2PrCl5 (orthorhombisch, Pnma, Z = 4, hexagonal gebündelte Ketten kantenverknüpfter Polyeder [PrCl7]) order mit Cs2DyCl5 (orthorhombisch, Pbnm, Z = 4, hexagonal gebündelte Ketten cis-eckenverknüpfter Oktaeder [DyCl6]) isotyp, sie können in Strukturfeld-Diagrammen voneinander abgegrenzt werden. Die Thermische Ausdehnung wird für Cs2SLuCl5 und Rb2PrX5 (X = Cl, Br, I) röntgenographisch verfolgt.
    Additional Material: 3 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 869-875 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Glycosides of Amino Sugars, IV. Synthesis of Disaccharides of 2-Amino-2-deoxy- and 3-Amino-3-deoxy-D-glucoseThe solvent dependency of the Koenigs-Knorr reaction between two derivatives of 2-amino-2-deoxy-D-glucose (3 and 4) was investigated. The highest yield of the α-disaccharide 5 was obtained in the system toluene/1,2-dimethoxyethane. The condensation of two derivatives of 3-amino-3-deoxy-D-glucose (11 and 13) under similar conditions yielded the 1,6-linked α-and β-disaccharides (15, 14) of this sugar which were unknown until now.
    Notes: Die Koenigs-Knorr-Reaktion zwischen zwei Derivaten der 2-Amino-2-desoxy-D-glucose (3 und 4) wurde in Abhängigkeit vom Lösungsmittel untersucht. Die höchste Ausbeute an α-Disaccharid 5 konnte in einem Gemisch von Toluol und 1,2-Dimethoxyäthan erhalten werden. Die Kondensation zweier Derivate der 3-Amino-3-desoxy-D-glucose (11 und 13) unter ähnlichen Bedingungen führte zu den bisher unbekannten 1,6-verknüpften α- und β-Disacchariden (15 bzw. 14) dieses Zuckers.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1188-1194 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Di- and Polyamino Sugars, XX. Synthesis of 2,3,4,6-Tetraamino-2,3,4,6-tetradeoxy-D-glucoseThe title compound has been prepared by introduction of two amino functions into the molecule of 2,3-diamino-2,3-dideoxy-D-glucose. Instead of the free sugar we obtained mainly the pyrrolidine 17.
    Notes: Die Titelverbindung wurde durch Einführung von zwei Stickstoff-Funktionen in die 2,3-Diamino-2,3-didesoxy-D-glucose dargestellt. Anstelle des freien Zuckers erhielten wir hauptsächlich das Pyrrolidin 17.
    Type of Medium: Electronic Resource
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