Unusual Metalloporphyrin Complexes of Rhenium and Technetium

Abstract

Monometallic and bimetallic porphyrin complexes of rhenium and technetium were synthesized. Visible spectroscopy indicates that first the monometallic and then the bimetallic porphyrin complex is formed. The monometallic complex of rhenium can further react with either Re2(CO)10 or Tc2(CO)10 to form the homo- and heterodinuclear metalloporphyrin complexes. Structural data for the homodinuclear metalloporphyrin complexes of both rhenium and technetium were obtained by single crystal X-ray diffraction. Both the rhenium and technetium homodinuclear porphyrins are centrosymmetric complexes having two metals bonded to the porphyrin, one above and one below the plane of the macrocycle while the porphyrin macrocycle is highly distorted. Proton magnetic resonance spectra gave evidence for the proposed structures. A fluxional character of both Re and Tc monometallic porphyrin complexes was observed by variable-temperature pmr spectral studies. A novel thermal disproportionation of (H-MP)Tc(CO)3 was also observed.

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Document Details

Document Type
Technical Report
Publication Date
Jun 06, 1975
Accession Number
ADA012430

Entities

People

  • C. P. Hrung
  • D. L. Cullen
  • D. Ostfeld
  • M. Tsutsui
  • T. S. Srivastava

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Carbonyl Complexes
  • Chemical Synthesis
  • Chemistry
  • Chlorides
  • Diffraction
  • Diffraction Analysis
  • Diffractometers
  • Distortion
  • Mass Spectra
  • Materials
  • Measurement
  • Organic Chemistry
  • Scattering
  • Spectra
  • Spectroscopy
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry