The chemistry of technetium: Toward improved diagnostic agents

Preparation and crystal structures of [AsPh4]4[Tc4N4O2(ox)6] and [AsPh4]2[TcO(ox)2(Hox)]·3H2O: technetium complexes containing quadridentate or unidentate oxalato ligands

“…~~ Structure (2) represents a new structural type closely related to [NH,]3[NbO(ox),]-H,0 which is ~even-co-ordinate.~~ An example of a seven-coordinate technetium complex containing the Tc-O core is Ba[TcO(edta)], (edta = ethylenediaminetetra-acetate). 32 The reason why six-co-ordination with a pendant oxalate is preferred for (2) rather than the five-or seven-co-ordinate complexes with all oxalato ligands bidentate is unclear.…”

Technetium(V)–nitrido complexes of dithiocarbazic acid derivatives. Reactivity of [TcN]2+core towards Schiff bases derived from S-methyl dithiocarbazate. Crystal structures of [S-methyl 3-(2-hydroxyphenylmethylene)dithiocarbazato]nitrido(triphenylphosphine)technetium(V) and bis(S-methyl 3-isopropylidenedithiocarbazato)nitridotechnetium(V)

“…y = 101.34 (1), and Z = 2; for (2): refined from 1 756 reflections with I > 30 (1) t o a final R of 0.023, crystals are monoclinic, space group 12/a, with unit-cell dimensions a = 16.707 (3), b = 8.838 (1), c = 12.51 4(2)A, (j = 106.85(1 ) O , and Z = 4. In both complexes, the co-ordination around Tc is distorted square pyramidal with an apical multiply bonded nitrogen atom [Tc=N 1.61 1 (3) A in ( I ) and I .613(3) A in (2)] and the basal ligands bent away from the nitrido group.…”

Comparison of desorption ionization methods for the analysis of neutral seven-coordinate technetium radiopharmaceuticals

“…Costello and co-workers used positive (4,5) and negative (6) field desorption (FD) mass spectrometry (11) to characterize Tc-containing complexes (12). They performed a chromatographic separation of rat bile and urine followed by FD-MS to establish the presence of a "Tc complex (6).…”