Technetium phthalocyanine

Recoil implantation was first performed by Baumgartner and Reichold (1961) for fission recoil synthesis of ruthenocene. This technique was applied to the synthesis of new compounds of technetium phthalocyanine (Yoshihara et al. 1974b) and Tc(II)(acac)2 (Sekine and Yoshihara 1981). In the latter case, sublimatographic separation was effectively employed (O Fig. 24.19). 

Teta—see Acetic acid, tctramethylenediaminetetra-Technetium complexes cupferron, 510 phthalocyanines, 866 polypyrazolylborates, 251 porphyrins, 826 pseudohalides, 229, 230 Tellurium... 

Radiochromatographic techniques have been used to determine the rates of oxidation of cysteine by pertechnate ion, Tc04. The technetium(vu) is reduced by the thiol (and cysteine ethyl ester) to form a Tc complex which involves both S- and 7V-co-ordination of the amino-acid. The rate law is first order with respect to both [Tc ] and [RSH]. A hydrogen-ion dependence observed is attributed to the formation of pertechnic acid, the rate-determining step being the nucleophilic attack by the thiol at the metal centre of HTCO4. The oxidation of RSH (R=Et, Pr, or Bu) has been studied over the range 20—40 °C in aqueous alkaline solutions in the presence of metal phthalo-cyanines. The reaction is zero order with respect to [thiol], first order in phthalocyanin and decreases in the order M = Co>Mn> V>Feii. No effects are observed from the nature of the alkali cation. 

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