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Pyrazolonderivate VII Synthese und Struktur von Metallchelatkomplexen mit 4-aminomethylen-Δ2-pyrazolinon-(5)-ligaden

Synthesis and structure of metal complexes with 4-aminomethylene-Δ2-pyrazoline-(5) ligands ligands

Eine15N-,1H- und13C-NMR-Studie

  • Organic Chemistry and Biochemistry
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Abstract

In the reaction of 4-aminomethylene-Δ2-pyrazolin-5-ones with metal acetates new chelate complexes with a ligand-metal ratio of 2:1 are formed. For structural investigations15N-labeled compounds and azomethines of the pyrazole type are also prepared. The15N-,13C-, and1H-chemical shifts have been measured in CDCl3. Chemical shifts as well as coupling constantsnJ (13C−15N)n=1, 2;2 J (HC=15N);2 J (=CH−15N) are discussed with regard to the structure of metal complexes and azomethines. It has been shown that complex formation causes a considerable change of the π-electron structure within the merocyanin part.

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Authors and Affiliations

  1. Zentralinstitut für Optik und Spektroskopie, Akademie der Wissenschaften der DDR, DDR-1199, Berlin-Adlershof

    Wolfgang Freyer

  2. Zentralinstitut für Physikalische Chemie, Akademie der Wissenschaften der DDR, Bereich physikalische Methoden der analytischen Chemie, DDR-1199, Berlin-Adlershof

    Reiner Radeglia

Authors
  1. Wolfgang Freyer
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  2. Reiner Radeglia
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Freyer, W., Radeglia, R. Pyrazolonderivate VII Synthese und Struktur von Metallchelatkomplexen mit 4-aminomethylen-Δ2-pyrazolinon-(5)-ligaden. Monatshefte für Chemie 112, 105–117 (1981). https://doi.org/10.1007/BF00906247

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  • DOI: https://doi.org/10.1007/BF00906247

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