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Studies on technetium complexes containing nitrogen heterocyclic ligands

Thesis/Dissertation ·
OSTI ID:7169133

Two classes of low valent technetium complexes containing polypyridyl ligands have been prepared and characterized by spectrophotometric, mass spectroscopic, electrochemical and single crystal x-ray structure techniques. The first class, of the general form cis(X),trans(P)-(Tc/sup III/II/X/sub 2/ (PR/sub 2/R')L)/sup +/0/ (X = Cl or Br, L = 2,2'-bipyridine, 1,10-phenanthroline or 4,4'-dimethyl-2,2'-bipyridine), can be prepared in either the Tc(III) or Tc(II) form. The second class, of the general form trans (P)-TcX(PR/sub 2/R')terpy/sup +/, can be prepared only in the Tc(II) form. A series of Tc(V) complexes containing 8-quinolinolate ligands has been synthesized and characterized. The complexes are of the general form TcO(L)/sub 2/X, where L is a bidentate 8-quinolinolate ligand and X is Cl or Br. The complexes have been characterized by elemental analysis, UV-visible and IR spectroscopy and by single crystal x-ray structural analysis of TcO (oxMe)Cl (oxMe = 2-methyl-8-quinolinolate). Single crystal x-ray structural analysis of a new complex chlorobis(2-(2-hydroxyphenyl)benzothialoato)-oxotechnetium(V), TcO(hbt)/sub 2/Cl, is presented. This complex results from the oxidative intramolecular ring closure reaction of a tridentate O,N,S Schiff base molecule N-(2-mercaptophenyl)salicylideneimine to form the bidentate 2-(2-hydroxyphenyl)benzothiazole moiety.

Research Organization:
Cincinnati Univ., OH (USA)
OSTI ID:
7169133
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CHEMISTRY
COHERENT SCATTERING
COMPLEXES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTROCHEMISTRY
INFRARED SPECTRA
MASS SPECTROSCOPY
PHOTOMETRY
SCATTERING
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TECHNETIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES
ULTRAVIOLET SPECTRA
X-RAY DIFFRACTION