Chemistry and structure of hexakis(thiourea-S)technetium(III) trichloride tetrahydrate, [Tc(SC(NH2)2)6]Cl3.4H2O

Synthesis, Characterization, and Crystal Structure of [ReO(Me4tu)4](PF6)3 (tu = thiourea)

“…Thiourea and its derivatives have long attracted attention as ligands for Tc complexes [6±8]. Due to the easy substitution of the thiourea ligand under mild conditions [Tc III (thiourea-S) 6 ]Cl 3 has been succesfully tested as precursor to other low-valent Tc compounds [9±11]. In this research area we have recently synthesized and characterized the analogous Re III compound…”

“…[Re(thiourea-S) 6 ]Cl 3 [12]. N-methylthiourea and N,N'-dimethylthiourea do also stabilize Tc III by forming analogous cationic hexacoordinated complexes [8,13].…”

“…N-methylthiourea and N,N'-dimethylthiourea do also stabilize Tc III by forming analogous cationic hexacoordinated complexes [8,13]. However in the case of tetramethylthiourea (Me 4 4 ](PF 6 ) 3 has been synthesized and characterized by electronic and infrared spectroscopy. No crystal structure determination has so far been reported [8].…”

(3,6-Dimethyl-3,6-diazaoctan-1,8-dithiolato-S1,N3,N6,S8)oxotechnetium(V) pertechnetate

“…The ligand atoms bonded to Tc form a rough square pyramid such that the Tc atom lies 0.770 (3)/k above the best S1, N1, N2, $2 plane. The plane is quite distorted, however, with the two N atoms lying about one quarter of an ~,ngstr6m on either side of this plane (8) et al, 1978;Bandoli, Nicolini et al, 1984;Franklin et al, 1982) and much shorter than in Tc IIl complexes [range 2.412 to 2.520(3)A] (Abrams, Davison, Faggiani, Jones & Lock, 1984;Baldas, Bonnyman, Pojer, Williams & MacKay, 1982). Distances within the organic moiety are normal and all angles lie within the ranges of related We acknowledge, with thanks, financial support from the Natural Sciences and Engineering Research Council of Canada.…”

Harvard-MIT research program in short-lived radiopharmaceuticals. Final report

“…Results [1977][1978][1979][1980][1981][1982][1983][1984][1985][1986][1987][1988][1989] Studies in Technetium Chemistry -to facilitate the design of radiopharmaceuticals first identification and characterization of oxotechnetium(V) complexes isolated from aqueous solution elucidation of the systematics in technetium complexation first application of high resolution field desorption mass spectroscopy to the structure of these complexes design and synthesis of new agents for heart, brain, and kidney imaging based on the chemistry of the element; n.b. isonitriles for cardiac imaging with SPECT development of new classes of cationic and neutral complexes determination that the uptake of Tc(AcAc), complexes by the brain has a maximum that depends on lipophilicity…”