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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 3 (1997), S. 1232-1237 
    ISSN: 0947-6539
    Keywords: antimony ; heteropolyanions ; polyoxometalates ; synthesis design ; tungsten ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Proceeding from the α-B-SbW9O33 fragment 1, various novel large heteropolyanions ([Na2Sb8W36O132(H2O)4]22- (2), [Sb2W22O74(OH)2]12- (3) and [Sb2W20M2O70(H2O)6](14-2n)- (4); Mn+ = Fe3+, Co2+, Mn2+, Ni2+) have been obtained in crystalline form by systematic synthesis. Their unexpected structures have been studied by X-ray diffraction: 2, 3 and 4 contain β-SbW9 units connected to each other by Sb3+ ions, WO2/WO2OH groups, and WO2/Mn+ (H2O)3 groups, respectively. Structural details and especially the systematic synthesis strategy for the formation of these interesting polytungstates are discussed in order to explain the unusual behaviour of 1 in aqueous solution under different reaction conditions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 191 (1962), S. 179-180 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 84 (1951), S. 527-531 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N-Phenacetyl-β-cyclohexenyl-äthylamin, welches sich nach Schnider und Hellerbach in die „Vorstufe“ und damit in Morphinan überführen läßt, wird auf einem neuen Wege auf der Basis von Cyclohexanon und Acetylen aufgebaut.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1427-1433 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: GeH3-Substituted Carbonyl Metallates and carbonyl (cyclopentadienyl) Metallates with V, Nb, Cr, Mo, W, Re, Co, and Ni. - Preparative and X-Ray InvestigationsKGeH3 reacts with different metal carbonyls and cyclopentadienyl-metal carbonyls with substitution of one CO group and formation of GeH3-substituted carbonyl metallates [M(CO)3(η5-C5H5)GeH3]⊖ [M: V (1), Nb (2)], [M(CO)5GeH3]⊖ [M: Cr (3), Mo (4), W (5)], [Re(CO)2(η5-C5H5)GeH3]⊖ (6), [Ni(CO)3-GeH3]⊖ (7), [Ni(CO)2(PPh3)GeH3]⊖ (8), and [Co(CO)(η5-C5R5)-GeH3]⊖ [R: H (9), Me (10)]. The K salts thus obtained are very air-sensitive and in most cases rather thermolabile. Reaction with [PPh4]Br in aqueous solution yields the somewhat more stable and better crystallizable phosphonium salts. They have been characterized by elemental analysis, spectroscopy (IR, 1H-NMR), and X-ray methods in the cases of 1, 4, 5, 7, and 8. Their short Ge-metal distances are remarkable, although disorder problems prevented a higher precision in most cases.
    Notes: KGeH3 reagiert mit verschiedenen Metallcarbonylen und Cyclopentadienylmetallcarbonylen unter Substitution einer CO-Gruppe und Bildung von GeH3-substituierten Metallaten [M(CO)3(⊖5-C5H5)GeH3]⊖ [M: V (1), Nb (2)], [M(CO)5GeH3]⊖ [M: Cr (3), Mo (4), W (5)], [Re(CO)2(η5-C5H5)GeH3]⊖ (6), [Ni(CO)3GeH3]⊖ (7), [Ni(CO)2(PPh3)GeH3]⊖ (8) und [Co-(CO)(η5R5)GeH3]⊖ [R: H (9), Me (10)]. Die so gebildeten K-Salze sind sehr luftempfindlich und meist ziemlich thermolabil. Umsetzung mit [PPh4]Br in wäßriger Lösung ergibt die etwas stabileren und besser kristallisierenden Phosphonium-Salze. Sie wurden elementaranalytisch und spektroskopisch (IR, 1H-NMR) charakterisiert und im Falle von 1, 4, 5, 7 und 8 auch röntgenographisch untersucht. Auffallend sind ihre kurzen Ge-Metall-Abstände, obgleich wegen Fehlordnungsproblemen meist keine große Genauigkeit erreichbar war.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 343 (1966), S. 87-91 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The reaction of acetyl chloride with Ni2+-ions in acetic acid as the solvent gives good yields of the yellow-brown acetic acid hemisolvate of nickel chloride. It is stable when protected against moisture and is desolvated only on heating to about 190°C. In the presence of moisture it is transformed to nickel chloride dihydrate.In a similar reaction light-brown acetic acid hemisolvate of nickel bromide is formed, which is stable only in presence of acetic acid.With acetyl iodide no other compound can be obtained than anhydrous nickel iodide.
    Notes: Die Einwirkung von Acetylchlorid auf Ni(II)-Ionen in wasserfreier Essigsäure führt in guter Ausbeute zum gelbbraunen Nickel(II)-chlorid-Essigsäurehemisolvat. Dieses ist unter Feuchtigkeitsausschluß stabil und wird erst beim Erhitzen auf etwa 190°C desolvatisiert. In Gegenwart von Luftfeuchtigkeit geht es in Nickel(II)-chlorid-dihydrat über.In analoger Umsetzung entsteht ein hellbraunes Nickel(II)-bromid-Essigsäurehemisolvat, welches nur in Gegenwart von Essigsäure stabil ist.Mit Acetyljodid resultiert nur solvatfreies Nickel(II)-jodid.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 343 (1966), S. 92-100 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Several solvates of nickel acetate, e.g. Ni(OOCCH3)2 · H2O, Ni(OOCCH3)2 · 1/2 H2O · 1/2 CH3COOH and Ni(OOCCH3)2 · 1/2 CH3COOH as well as nonsolvated, crystalline Ni(OOCCH3)2 were obtained by heating the tetrahydrate Ni(OOCCH3)2 · 4 H2O in acetic acid, acetic anhydride and mixtures of acetic acid and acetic anhydride, respectively. It is not possible to prepare the nonsolvated, crystalline Ni(OOCCH3)2 by heating the tetrahydrate.The double salt KOOCCH3 · Ni(OOCCH3)2 is prepared from nickel acetate solution in acetic anhydride by addition of KOOCCH3.These nickel compounds have rather high magnetic moments (μeff = 3.1-3.6 BM).
    Notes: Verschiedene Nickelacetatsolvate, wie z. B. Ni(OOCCH3)2 ·H2O, Ni(OOCCH3)2 · 1/2 H2O · 1/2 CH3COOH, Ni(OOCCH3)2· 1/2 CH3COOH sowie solvatfreies, kristallines Ni(OOCCH3)2 können durch Erhitzen von Ni(OOCCH3)2 · 4 H2O in Essigsäure, Essigsäure-anhydrid und Essigsäure-Essigsäureanhydrid-Gemischen erhalten werden. Es ist nicht möglich, durch thermisches Entwässern von Ni(OOCCH3)2 · 4 H2O solvatfreies, kristallines Ni(OOCCH3)2 darzustellen.Aus Nickelacetatlösungen in Essigsäureanhydrid fällt mit Kaliumacetat das Doppelsalz KOOCCH3 · Ni(OOCCH3)2 aus.Die untersuchten Nickelsalze zeigen relativ hohe magnetische Momente (μeff = 3,1 bis 3,6 BM).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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