Ligand-exchange reactivity patterns of oxotechnetium(V) complexes
Journal Article
·
· Inorg. Chem.; (United States)
- Harvard Medical School and Brigham and Women's Hospital, Boston, MA
The ligand-exchange reactions of various oxotechnetium(V) complexes with 1,2-dithiols have been investigated. The complexes (TcO(OCH/sub 2/CH/sub 2/O)/sub 2/)/sup -/(1), (TcO(O/sub 2/C/sub 6/H/sub 4/)/sub 2/)/sup -/(2), and (TcO(SCH/sub 2/CH/sub 2/O)/sub 2/)/sup -/(3) all react with 2 equiv of 1,2-ethanedithiol to ultimately form (TcO(SCH/sub 2/CH/sub 2/S)/sub 2/)/sup -/(4). However, different mechanisms and/or intermediates are observed in each case. The reaction of 1 proceeds without evidence for the formation of intermediates. In the reaction of 2, an intermediate is detected, which is probably a mixed-ligand oxotechnetium monomer; and in the reaction of 3 the spectrum of the intermediate formed is similar to that of the dimer species ((TcO)/sub 2/(SCH/sub 2/CH/sub 2/S)/sub 3/) (5). The relation of these results to ligand-exchange reactions of 1,2-dithiols with citrate complexes of technetium is discussed. Reaction of 1,3-propanedithiol with (TcOCl/sub 4/)/sup -/ gives a compond formulated as ((TcO)/sub 2/(SCH/sub 2/CH/sub 2/CH/sub 2/S)/sub 3/), which does not react with further amounts of ligand to form the bis(1,3-dithiolato) monomer, as would be anticipated from the sequential formation of 4 from 5 in the reacton of (TcOCl/sub 4/)/sup -/ with 1,2-ethanedithiol.
- DOE Contract Number:
- AC02-76EV04115
- OSTI ID:
- 5217172
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 22:16; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thiol complex of technetium pertinent to radiopharmaceutical use of /sup 99m/Tc
Synthesis of sulfido and oxo complexes of technetium(V) and rhenium(V) containing dithiolato and hydrotris(1-pyrazolyl)borato ligands. Crystal structures of dimeric bis([mu]-ethane-1,2-dithiolato)bis(ethene-1,2-dithiolato)technetium(IV) and [hydrotris(1-pyrazolyl)borato](ethane-1,2-dithiolato)oxorhenium(V)
Synthesis of inequivalently bridged cyclopentadienyl dimers of molybdenum and a comparison of their reactivities with unsaturated molecules and with hydrogen
Journal Article
·
Wed Aug 16 00:00:00 EDT 1978
· J. Am. Chem. Soc.; (United States)
·
OSTI ID:6548347
Synthesis of sulfido and oxo complexes of technetium(V) and rhenium(V) containing dithiolato and hydrotris(1-pyrazolyl)borato ligands. Crystal structures of dimeric bis([mu]-ethane-1,2-dithiolato)bis(ethene-1,2-dithiolato)technetium(IV) and [hydrotris(1-pyrazolyl)borato](ethane-1,2-dithiolato)oxorhenium(V)
Journal Article
·
Wed May 12 00:00:00 EDT 1993
· Inorganic Chemistry; (United States)
·
OSTI ID:6236194
Synthesis of inequivalently bridged cyclopentadienyl dimers of molybdenum and a comparison of their reactivities with unsaturated molecules and with hydrogen
Journal Article
·
Wed Aug 10 00:00:00 EDT 1983
· J. Am. Chem. Soc.; (United States)
·
OSTI ID:6831783