Synthesis, spectroscopy, and structural characterization of neutral seven-coordinate technetium xanthate complexes. X-ray structure of (Tc(PPh sub 3 )(S sub 2 COC sub 4 H sub 9 ) sub 3 ), a capped octahedral technetium(III) complex
- Massachusetts Institute of Technology, Cambridge (USA) Harvard Medical School, Boston, MA (USA)
- Massachusetts Institute of Technology, Cambridge (USA)
- Harvard Medical School, Boston, MA (USA)
Reaction of (Bu{sub 4}N)(TcOCl{sub 4}) with triphenylphosphine and an excess of potassium xanthate yields neutral complexes of the general formula (Tc(PPh{sub 3})(S{sub 2}COR){sub 3}) (R = ethyl, isopropyl, n-butyl, neopentyl). The infrared spectra show a single C{double bond}S absorption from the exclusively bidentate xanthate ligands. The fast-atom-bombardment mass spectral results show the parent ions and a complex fragmentation pattern that includes two sulfido species. The x-ray structure of (Tc(PPh{sub 3})(S{sub 2}COBu{sup n}){sub 3}) confirms the unusual seven-coordinate, capped octahedral geometry, with the technetium and phosphorus atoms each sitting on 3-fold axes and a single crystallographically unique n-butyl xanthate ligand. Crystal data for C{sub 33}H{sub 42}O{sub 3}PS{sub 6}Tc is reported. The {sup 1}H NMR spectra show that the 3-fold molecular symmetry is maintained in solution, with a single set of C-H absorptions from the three xanthate ligands. The {sup 99}Tc NMR resonances of these complexes fall in the Tc(V) region and are the first technetium complexes with sulfur ligation to be so characterized. 16 refs., 3 figs., 4 tabs.
- OSTI ID:
- 6835185
- Journal Information:
- Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 29:1; ISSN 0020-1669; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis, spectroscopy, and structural characterization of five-coordinate, bis(aryldiazenido)technetium complexes and their protonation reactions. X-ray structure of (TcCl(PPh sub 3 ) sub 2 (NNC sub 6 H sub 4 Br) sub 2 )
Synthesis and characterization of technetium(V) complexes with amine, alcoholate, and chloride ligands
Related Subjects
400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COMPLEXES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
NMR SPECTRA
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANOMETALLIC COMPOUNDS
RADIOISOTOPES
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TECHNETIUM 99
TECHNETIUM COMPLEXES
TECHNETIUM ISOTOPES
TRANSITION ELEMENT COMPLEXES
XANTHATES
YEARS LIVING RADIOISOTOPES