title: Oxotechnetium(V) complexes with a novel class of tridentate thiosemicarbazide ligands.
abstract: A novel tridentate thiosemicarbazide-type ligand class with an SNS donor set, H(2)L(1), was prepared by reactions of N-[N',N'-dialkylamino(thiocarbonyl)]benzimidoyl chlorides with thiosemicarbazides. H(2)L(1) ligands readily react with (NBu(4))[TcOCl(4)] in MeOH under the formation of red oxotechnetium(V) complexes of composition [TcOCl(L(1))]. The monomeric, five-coordinate compounds are air-stable and bind (L(1))(2-) tridentate in the equatorial coordination sphere. The compounds represent the first examples of oxotechnetium(V) complexes with NS chelate-bonded thiosemicarbazones.
authors.affiliation: Institute of Chemistry and Biochemistry, Freie Universitat Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany.
authors.forename: Hung Huy
authors.initials: HH
authors.lastname: Nguyen
authors.forename: Pedro I da S
authors.initials: PI
authors.lastname: Maia
authors.forename: Victor M
authors.initials: VM
authors.lastname: Deflon
authors.forename: Ulrich
authors.initials: U
authors.lastname: Abram
mesh_terms: D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D015609:Organotechnetium Compounds / Q000737:chemistry*; D012663:Semicarbazides / Q000737:chemistry*; D013890:Thiourea / Q000737:chemistry
chemical_list: D008024:Ligands; D015609:Organotechnetium Compounds; D012663:Semicarbazides; C005151:thiosemicarbazide; D013890:Thiourea