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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 613 (1992), S. 132-136 
    ISSN: 0044-2313
    Keywords: Amino-acidate complexes ; Copper(II) ; ESR ; N-alkylated amino acids ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Elektronen- und ESR-Spektren von Kupfer(II)-Komplexen mit N,N-DialkylaminosäurenFünf N,N-Dialkylaminosäuren sowie ihre Kupfer(II)-Komplexe (s. „Abstract“) werden dargestellt. Die UV/VIS-Spektren der Komplexe werden in CH2Cl2 und die ESR-Spektren in CH2Cl2, CD3 OD, und D2O aufgenommen. Die Analyse der mittleren Abweichung zeigt bei den ESR-Spektren Einflüsse durch das Lösungsmittel und durch Unterschiede der Substituenten. Der erstere Effekt ist verbunden mit dem Kovalenzgrad der Kupfer-Ligand-Bindungen. Der Einfluß der Diastereoisomerie der Liganden auf das ESR-Spektrum der Komplexe wird gezeigt und erklärt.
    Notes: Five N,N-dialkylamino acids were synthesised [4]: N,N-dimethylisoleucine (DMIL), N,N-dimethyl-alloisoleucine (DMAIL), N,N-dimethylvaline (DMV), N,N-diethyl-alanine (DEA), and N,N-diethylvaline (DEV), as well as their complexes with copper(II): Cu(DMIL)2, Cu(DMAIL)2, Cu(DMV)2, Cu(DMIL)(DMV), Cu(DEA)2, and Cu(DEV)2. UV/VIS spectra of the complexes were recorded in CH2Cl2 solutions and the ESR spectra in CH2Cl2, CD3OD, and D2O solutions. By applying the analysis of variance, ESR spectra were shown to be influenced by the solvent and substituent differences, the former effect being related to the degree of covalency of the copper-ligand bonds. The effect of the ligand's spatial configuration (diastereoisomerism) upon the ESR spectrum of the complex was demonstrated and explained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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