Synthesis, structure, and complexation of a large 28-mer macrocycle containing two binding sites for either anions or metal ions

L Cronin, P A McGregor, S Parsons, S Teat, R O Gould, V A White, N J Long, N Robertson

Research output: Contribution to journalArticlepeer-review

Abstract

The "one-pot" synthesis and characterization of a large 28-mer macrocycle (H4L2) with oxamido units capable of complexing guest ions through oxygen or nitrogen donor atoms is reported. Single-crystal structure determination of H8L2(NO(3))4 and {CU2[H2L2](H2O)(2)}(NO3)(2) demonstrated that the macrocycle contains two sites capable of complexing two nitrate anions or two copper(II) ions, involving a large structural reorganization in the conformation of the macrocyclic framework on coordination of the copper(Il) ions when compared to the nitrate. Electrochemical and magnetic susceptibility measurements on the dinuclear Cu(II) complex and the related mononuclear and trinuclear Cu(II) complexes derived from the related 14-mer macrocycle were carried out and illustrate the role of the oxamido groups in mediating metal-metal interaction and delocalization.

Original languageEnglish
Pages (from-to)8023-8029
Number of pages7
JournalInorganic Chemistry
Volume43
Issue number25
DOIs
Publication statusPublished - 13 Dec 2004

Keywords

  • MAGNETIC-PROPERTIES
  • CRYSTAL-STRUCTURE
  • COPPER(III) COMPLEXES
  • CYCLAM DERIVATIVES
  • OXAMIDE
  • LIGANDS
  • COORDINATION
  • RECOGNITION
  • CU

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