Technetium carbonyl

Technetium carbonyl, 16 66 Technical art history, 11 398 Technical Association of the Pulp and Paper Industry (TAPPI), 21 17 Technical enzymes, 10 310 Technical-grade active ingredient analysis, 18 544... 

The chemistry of the technetium carbonyls has not been extensively studied and tetranuclear species have not yet been reported. 

Keywords Technetium Carbonyl complexes Technetium cyclopentadienyl Vitamin B12 Molecular imaging... 

There are several examples of metal carbonyls containing a Tc(CO)5 fragment. The carbonyl halides Tc(CO)sX (X = Cl, Br, and 1) may be prepared by the reaction of the halogen with Tc2(CO)io. The reaction with chlorine or bromine occurs readily at room temperature but the reaction with iodine is very slow. The IR spectra of these compounds have shown three v(C-O) bands expected for C4 symmetry, between 2153 and 1991 cm. Several other technetium carbonyl halide species have been identified by... 

The technetium carbonyl catalysts, [Tc2(CO)io]° and [Tc2(CO)io]°/P(n-C4H9)3 promote the hydroformylation reactions of cyclohexenc, propene, and 1-octene in solution at 235 °C and a pressure of 20 MPa. [Tc2(CO)io] VP(n-C4Hg)3 showed the best results in activity and selectivity within the anologous subgroup VII complexes studied, but proved to be a rather poor catalyst compared with the cobalt or rhodium carbonyl compounds [22]. 

Very recently technetium carbonyl triphenylphosphinc complexes containing 1.4-benzodiazepinc derivatives were synthesized by reaction of [Tc(CO)3Cl(PPh3)2] in refluxing CH2Cl2/EtOH with 7-chloro-5-(2-chlorophenyl)-l,3-dihydro-2H-l,4-bcnzo-diazepine-2-one-4-oxide (LH) and other derivative ligands. Pale yellow crystals of the... 

Reaction of [Tc(CO)3Br]4° with an excess of TI-IF produced the crystalline, probably dimeric compound [Tc(CO)3Br THF]2 . In acetonitrile the analogous complex [Tc(CO)3BrCH3CN]2° w as reported to bo formed [651]. The mass spectra of technetium carbonyl compounds were studied extensively [652]. 

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