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  • Electronic Resource  (13)
  • Chemistry  (10)
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  • 11
    Electronic Resource
    Electronic Resource
    Molecular addition compounds of tin(iv) chloride. I. Preparation and infrared spectra of the complexes of stannic chloride with certain amides (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 332 (1964), S. 103-112 
    Details
    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
    URL: http://dx.doi.org/10.1002/zaac.19643320112
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Studies on MM″(NCS)4 [M=Ni(II), Fe(II), Zn(II), and M″=Hg(II) Zn(II)] complexes (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 423 (1976), S. 173-179 
    Details
    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
    URL: http://dx.doi.org/10.1002/zaac.19764230211
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  • 13
    Electronic Resource
    Electronic Resource
    Quantitative softness parameters and their application in elucidation of Structure of Bimetallic Tetrathiocyanate Complexes (1980)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 461 (1980), S. 222-230 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Quantitative „Softness“ Parameter und ihre Anwendung in der Strukturaufklärung von Bimetalltetracyanat-Komplexen〉2M(NCS)2M′(SCN)2〈 und [Ml6][M′(SCN)4], (M = COII und NiII; M′ = ZnII, CdII und HgII, L = Anilin, p-Toluidin, Pyridin, Nicotinamid, 2,2′-Bipyridin und 4-Aminopyridin) wurden dargestellt und charackterisiert. Die Strukturen werden auf Grund von Leitfähigkeits-, magnetischen und spektroskopischen (IR und VIS) Messungen, sowie durch gruppentheoretische Berechnungen und Ligandenfeldparametern vorgeschlagen. Diese Strukturvorschläge werden gestützt durch quantitative „Softness“ - Werte „\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm E}_{\rm n}^{_ + ^ +},{\rm E}_{\rm m}^{_{\rm +}^{\rm +}} $\end{document}“. Die totale „Softness“ von M und M′ und ihre Differenz \documentclass{article}\pagestyle{empty}\begin{document}$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}'} \right) $\end{document} wurden abgeleitet (Gleichungen siehe Abstract) und mit der Struktur der Komplexe in Verbindung gebracht.
    Notes: 〉2M(NCS)2M′(SCN)2〈 and [ML6][M′(SCN)4], (M = Co(II) and Ni(II), M′ = Zn(II), Cd(II) and Hg(II) and L = aniline(ani), p-toluidine(tol), pyridine(py), nicotinamide(nia), 2,2′-bipyridine(bipy) and 4-aminopyridine (apy)) have been prepared and characterized. Their structure have been proposed on the basis of molar conductance, magnetic moment, group theoretical calculations, ligand field parameters, infrared and electronic spectral studies. The proposed structures have also been supported by quantitative values of softness „\documentclass{article}\pagestyle{empty}\begin{document}$ {\rm E}_{\rm n}^{_ + ^ +},{\rm E}_{\rm m}^{_{\rm +}^{\rm +}} $\end{document}“,. Total softness of M and M′ and their difference \documentclass{article}\pagestyle{empty}\begin{document}$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}'} \right) $\end{document} have also been derived by the following equations and related to the structure of the complexes. \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm TE}_{\rm n}^{_ + ^ +} \left({\rm M} \right) = {\rm E}_{\rm n}^{_ + ^ +} \left({\rm M} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({\rm L} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({{\rm NCS}} \right) $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right) = {\rm E}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({\rm L} \right) + \sum {\rm E}_{\rm m}^{_ + ^ +} \left({{\rm SCN}} \right) $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \Delta {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M} - {\rm M}^\prime} \right) = \,|\,{\rm TE}_{\rm n}^{_ + ^ +} \left({\rm M} \right) - {\rm TE}_{\rm n}^{_ + ^ +} \left({{\rm M}}^\prime \right)$$\end{document}.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19804610134
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