Copper(II) complexes of asymmetrical and symmetrical acyclic pentadentate (N5) mono-Schiff-base ligands. The X-ray structure of [Cu(ppe-py)](ClO4)2

Hassan Keypour, Sadegh Salehzadeh, Robin G. Pritchard, Richard V. Parish

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In the presence of copper(II) ion, two asymmetrical tripodal tetraamine ligands N{(CH2)3NH2} {(CH2)2NH2}2 (pee), N{(CH2)3NH2}2 {(CH2)2NH2} (ppe) and one symmetrical ligand, N{(CH2)3NH2}3 (tpt), were condensed with 2-acetylpyridine. In EtOH-H2O solutions the reaction stops after the first condensation stage, and complexes of acyclic pentadentate(N5) mono-Schiff-base ligands were obtained. With asymmetrical tetraamines there are two possible condensation sites: the primary amine of the propylene, or the ethylene chain. The X-ray structure analysis of one complex, [Cu(ppe-py)](ClO4)2, indicates that condensation with 2-acetylpyridine in this case occurs at the propylene chain and the geometry around the copper ion is trigonal-bipyramidal.
    Original languageEnglish
    Pages (from-to)720-723
    Number of pages3
    JournalTransition Metal Chemistry
    Volume27
    Issue number7
    DOIs
    Publication statusPublished - Oct 2002

    Keywords

    • Schiff bases Role: SPN (Synthetic preparation), PREP (Preparation) (copper complexes, sym. acyclic pentadentate N5 Schiff bases; prepn. of); Crystal structure; Molecular structure (of copper sym. acyclic pentadentate N5 Schiff base complex)

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