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Dimeric iron n-confused porphyrin complexes.

Chen-Hsiung Hung1, Wan-Chin Chen, Gene-Hsiang Lee

  • 1Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan. chhung@cc.ncue.edu.tw

Chemical Communications (Cambridge, England)
|August 23, 2002
PubMed
Summary

Researchers synthesized a dimeric iron N-confused porphyrin under anaerobic conditions. Aerobic conditions led to oxygenation and formation of a novel ONCTPP porphyrinic ring.

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Area of Science:

  • Coordination Chemistry
  • Organometallic Chemistry
  • Materials Science

Background:

  • Iron N-confused porphyrins are versatile macrocycles with unique electronic and steric properties.
  • Understanding their reactivity under different conditions is crucial for developing new catalysts and materials.

Purpose of the Study:

  • To investigate the reactivity of iron N-confused porphyrins under anaerobic and aerobic conditions.
  • To synthesize and characterize novel porphyrinic structures derived from iron N-confused porphyrins.

Main Methods:

  • Anaerobic reaction of iron(III) N-confused tetraphenylporphyrin bromide (Fe(NCTPP)Br) with sodium phenylselenide (NaSePh).
  • Aerobic reaction of Fe(NCTPP)Br with NaSePh, followed by characterization of the products using spectroscopic and analytical techniques.

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Main Results:

  • A dimeric iron N-confused porphyrin, [Fe(NCTPP)]2, was successfully synthesized under anaerobic conditions.
  • Under aerobic conditions, a hydroxo-bridged iron dimer was formed, featuring Na bridging the outer-N atoms.
  • Oxygenation occurred on the inner core pyrrolic carbon, leading to the formation of a novel oxygen- and nitrogen-containing N-confused porphyrin (ONCTPP) ring.

Conclusions:

  • The reactivity of iron N-confused porphyrins is highly dependent on the reaction atmosphere (anaerobic vs. aerobic).
  • Novel porphyrinic structures, including an ONCTPP ring, can be accessed through controlled oxygenation reactions.
  • These findings expand the scope of N-confused porphyrin chemistry and offer pathways to new functional molecules.