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  • Springer  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    2-amino-4,6-lutidineN-oxide complexes formed from various copper(II) salts (1986)
    Springer
    Transition metal chemistry 11 (1986), S. 151-155 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Copper(II) complexes of 2-amino-4,6-lutidineN-oxide (4,6DMAH) have been isolated as tetrafluoroborate, nitrate, chloride and bromide salts, and characterized by spectral methods (i.e., i.r., u.v.-vis. and e.s.r.). Variation of the ligand-to-copper(II) ratio yielded solids having the following empirical formulae: [Cu(4,6DMAH)4]X2 (X=BF4), [Cu(4,6DMAH)2X2] (X=NO3, Cl) and [Cu(4,6DMAH)X2] (X=Br). In addition, a deprotonated ligand complex, Cu(4,6DMA)2, was prepared using copper(II) acetate. The Sigand usually binds to the copper(II) centresvia theN-oxide oxygen and only the deprotonated ligand coordinatesvia the exocyclic nitrogen as well as the TV-oxide oxygen. The complexes involving coordinated anions and at least two ligands are monomeric while Cu(4,6DMAH)Br2 is polymeric. The ring substituents affect either the stoichiometry or the stereochemistry of these solids when compared to less sterically demanding 2-aminopyridineN-oxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00637017
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  • 2
    Electronic Resource
    Electronic Resource
    Metal ion complexes of 2-picolinamineN-oxide (1988)
    Springer
    Transition metal chemistry 13 (1988), S. 29-34 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A series of cobalt(II), nickel(II) and copper(II) complexes of 2-picolinamineN-oxide, HA, has been prepared. Solids of formula [M(HA)3](BF4)2 (M=cobalt(II) or nickel(II); [Cu(HA)2]X2 (X=BF 4 − , NO 3 − ); [Co(HA)2X2] (X=Cl− or Br−); [Ni(HA)2Cl2] and [Cu(HA)X2] (X=Cl− or Br−] have been isolated and characterized by partial elemental analyses, molar conductivities, magnetic susceptibilities, DSC-TGA, and spectral methods. All complexes were found to be monomeric, and their spectral parameters are compared with those of the metal ion complexes ofN-alkyl-2-picolinamineN-oxides, 2-dialkylaminopyridineN-oxides and 2-picolinamine. The cobalt(II) and nickel(II) halide complexes spectrally show a mixture of octahedral and tetrahedral centres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041494
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  • 3
    Electronic Resource
    Electronic Resource
    Cobalt(II) complexes of the 2-aminopicolineN-oxides and 2-amino-4, 6-lutidineN-oxide (1988)
    Springer
    Transition metal chemistry 13 (1988), S. 45-49 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Cobalt(II) complexes of the four 2-aminopicolineN-oxides and 2-amino-4, 6-lutidineN-oxide were prepared from Co(BF4)2 and CoCl2, and characterized by partial elemental analyses, magnetic moments, molar conductivities, thermal analyses, and by plasma desorption mass, i.r., electronic, and e.s.r. spectroscopy. The compounds derived from CoCl2 are 4-coordinate, tetrahedral, molecular solids with CoO2Cl2 chromophores. Dq values range from 332 to 382 cm−1 and those of B from 758 to 813 cm−1 for the five solids. Three of the compounds prepared from Co(BF4)2 are octahedral with the following stoichiometry: [CoL6](BF4)2 where L=2-amino-4-picolineN-oxide and [CoL5(H2O)] (BF4)2 where L is either 2-amino-3-or 2-amino-5-picolineN-oxide. Both 2-amino-6-picolineN-oxide and 2-amino-4, 6-lutidineN-oxide gave square planar [CoL 4 2+ ] complex ions. While numerous square planar cobalt(II) centers are known, those described here are probably the first examples with monodentate ligands and a CoO4 center. They have weak e.s.r. spectra, magnetic moments between 2 and 3 BM and characteristic d-d spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041498
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