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  • Electronic Resource  (2)
  • 1975-1979  (1)
  • 1960-1964  (1)
  • Chemistry  (2)
  • Azolla
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 332 (1964), S. 103-112 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Eigenschaften von Additionsverbindungen des SnCl4 mit N, N-Dimethylformamid, Acetamid, Acetanilid und Benzamid werden mitgeteilt. Neben der Analyse zeigen auch Donator-Acceptor-Titrationen in Dichloräthan die allgemeine Formel SnCl4 · 2 Amid. Leitfähigkeitsmessungen in Nitromethan und Molekulargewichtsbestimmungen lassen auf das Vorliegen von monomeren Additionsverbindungen schließen. Aus den IR-Spektren geht an Hand einer Erniedrigung der (C—O)- und einer Erhöhung der (C—N)-Valenzschwingung eine Bindung der organischen Liganden an das Zinn über Sauerstoff hervor. Die relativen Basenstärken nehmen in der Reihe Dimethylformamid, Benzamid, Acetanilid, Acetamid ab.
    Notes: The molecular addition compounds of tin (iv) chloride with N, N-dimethyl formamide, acetamide, acetanilide, and benzamide have been prepared. They are of the type SnCl4 · 2 amide. This composition type has been confirmed by indicator titrations of stannic chloride against amides in dichloroethane. Conductivity measurements in nitromethane and molecular weight determinations show that they are true molecular addition compounds being monomeric.The infrared spectra of the adducts show that there are metal-to-oxygen bonds in all these compounds as is evidenced by a negative shift of the carbonyl stretching frequency and a positive shift of the C—N stretching frequency. The relative donor ability of the amides towards stannic chloride has been found to be: dimethyl formamide 〉 benzamide 〉 acetanilide 〉 acetamide.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 423 (1976), S. 173-179 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Untersuchungen an MM″ (NCS)4-Komplexen (M = NiII, FeII, ZnII; M″ = HgII, ZnII)Komplexe des Typs MM′(NCS)4 · xL M = NiII, FeII, ZnII; M″ = HgII, ZnII; x = 2, 4, 6; L = Nicotinamid (nia), Isonicotinsaiurehydroxid (inh) 2-Aminopyrimidin (2apm)] wurden dargestellt und charakterisiert durch Elementaranalyse, molare Leitfähigkeit, magnetisches Moment, IR- und Elektronenspektren.
    Notes: Coordination complexes of the type MM″(NCS)4 · xL M = Ni(II), Fe(II), Zn(II), M″ = Hg(II), Zn(II), x = 2, 4, 6 and L = nicotinamide (nia), 3-cyanopyridine (3-cpy), 4-cyanopyridine (4cpy), 4-aminopyridine (4apy), isonicotinic acid hydrazide (inh), 2-aminopyrimidine (2apm)l have been prepared and characterized by elemental analysis, molar conductance, magnetic moment, infrared and electronic spectral studies. Molar conductance data of NiZn(NCS), complexes are equivalent to 1:1 electrolyte. The infrared spectral studies indicate that only bridged thiocyanate groups are present in the complexes of the type NiHg(SCN)4 · 4L [L=3 and 4cpy, inh] and FeHg(SCN)4 · 2L [L = nia, 2apm], whereas both bridged and terminal thiocyanates are present in the complexes of the type NiHg(SCN)4 · 4L [L = nia, 3apy and ZnHg(SCN)4 · 2(inh). BOHR magneton values and electronic spectral data indicate an octahedral environment around nickel and iron in their complexes. Symmetry and group theory have also been used to establish the structure of the complexes.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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