Calix[4]pyrrole Schiff base macrocycles: Novel binucleating ligands for Cu(I) and Cu(II)

Jacqueline M. Veauthier, Elisa Tomat, Vincent M. Lynch, Jonathan L. Sessler, Utkir Mirsaidov, John T. Markert

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

New bimetallic copper(I) and copper(II) complexes of dipyrromethane-derived Schiff base macrocycles are reported. Two different structural motifs were identified, providing support for the notion that ligands of this type can support a variety of coordination modes. In the case of the Cu(I) complexes, the metal centers were found to have a distorted tetrahedral geometry and be coordinated to two imine nitrogens on each side of the ligand, with the exact structure depending on the choice of Schiff base macrocycle. In contrast to what is seen for Cu(I), with Cu(II) as the coordinated cation the Cu(II) metal centers assumed distorted square planar geometries, and both pyrrole N-Cu and imine N-Cu interactions were confirmed by single-crystal X-ray diffraction analysis. This structural analysis revealed a copper-copper distance of 3.47 Å, while SQUID magnetic susceptibility data provided evidence for antiferromagnetic coupling between the two metal centers.

Original languageEnglish (US)
Pages (from-to)6736-6743
Number of pages8
JournalInorganic Chemistry
Volume44
Issue number19
DOIs
StatePublished - Sep 19 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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    Veauthier, J. M., Tomat, E., Lynch, V. M., Sessler, J. L., Mirsaidov, U., & Markert, J. T. (2005). Calix[4]pyrrole Schiff base macrocycles: Novel binucleating ligands for Cu(I) and Cu(II). Inorganic Chemistry, 44(19), 6736-6743. https://doi.org/10.1021/ic050690d