Synthesis of and evidence for electronic communication within heteromultimetallic tetrakis(NCN-pincer metal)-(metallo)porphyrin hybrids

J Org Chem. 2010 Mar 5;75(5):1534-49. doi: 10.1021/jo902402g.

Abstract

Several heteromultimetallic pincer-porphyrin hybrids have been prepared in excellent yields by stepwise metalation of a general precursor, [2H(Br(NCN))(4)], which was designed in such a way so as to guarantee selectivity for either the porphyrin or pincer sites during the metalation steps. First, a metal was introduced in the porphyrin cavity using a metal(II) salt, followed by metalation of the pincer units through oxidative addition to an appropriate metal(0) complex. The resulting multimetallic complexes show an appreciable amount of intramolecular communication between the meso-pincer metal groups and the central metalloporphyrin component. This was manifested in changes of the optical and ligand-binding properties of the metalloporphyrin part upon reactions at the peripheral pincer sites.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Chimera
  • Crystallography, X-Ray
  • Electrochemistry
  • Electronics
  • Ligands
  • Metalloporphyrins / chemical synthesis*
  • Metalloporphyrins / chemistry
  • Metals / chemistry*
  • Molecular Structure
  • Oxidation-Reduction

Substances

  • Ligands
  • Metalloporphyrins
  • Metals