2-thenoyltrifluoroacetone

Thenoyltrifluoroacetone [326-91-0] M 222.2, m 42-44°, b 96-98°/9mm. Crystd from hexane or benzene. (Aqueous solns slowly decompose). 

Thenoyltrifluoroacetone and carboxin and its derivatives specifically block Complex II, the succinate-UQ reductase. Antimycin, an antibiotic produced by Streptomyees griseus inhibits the UQ-cytochrome c reductase by blocking electron transfer between bn and coenzyme Q in the Q site. Myxothiazol inhibits the same complex by acting at the site. 

Thenoyltrifluoroacetone(TTA), C4H3S,CO,CH2,COCF3. This is a crystalline solid, m.p. 43 °C it is, of course, a /1-diketone, and the trifluoromethyl group increases the acidity of the enol form so that extractions at low pH values are feasible. The reactivity of TTA is similar to that of acetylacetone it is generally used as a 0.1-0.5 M solution in benzene or toluene. The difference in extraction behaviour of hafnium and zirconium, and also among lanthanides and actinides, is especially noteworthy. 

After the stipulated leaching period, the waters were sampled before and after filtration through 0.05 ym Nuclepore filters and the oxidation-state distribution of plutonium in the filtrates was determined as follows PrF3 carrier precipitation for Pu(III) and (IV), PrF3 precipitation following NaHS03 reduction for total plutonium, and thenoyltrifluoroacetone (TTA) extraction... 

The exchange reaction between Np(VI) and Np(V) has been investigated using the isotopic method ( Np) and an extraction separation (Np(VI) with tri-butylphosphate or thenoyltrifluoroacetone in toluene) Cohen et al. have found, for the exchange in perchlorate media, a rate law... 

The reduction of pertechnetate with concentrated hydrochloric acid finally yields the tetravalent state, and no further reduction to the tervalent state takes place. Therefore, the tervalent technetium complex has usually been synthesized by the reduction of pertechnetate with an appropriate reductant in the presence of the desired ligand. Recently, the synthesis of tervalent technetium complexes with a new starting complex, hexakis(thiourea)technetium(III) chloride or chloropentakis(thiourea)technetium(III) chloride, has been developed. Thus, tris(P-diketonato)technetium(III) complexes (P-diketone acetylacetone, benzoyl-acetone, and 2-thenoyltrifluoroacetone) were synthesized by the ligand substitution reaction on refluxing [TcCl(tu)5]Cl2 with the desired P-diketone in methanol [28]. 

Pt(II)(8-quinolinolate), Tb(III)(TTFA)3(o-phen) with TTFA = thenoyltrifluoroacetonate and o-phen = 1.10— phenanthroline, Tb(III)(TTFA) , and Eu(III)(TFFA)3 (o-phen). An eel of Re(o-phen)(CO)3C1 occured during the electrolysis of tetralin hydroperoxide in the presence of the rhenium compound. The mechanism of these electrochemical reactions is discussed. 

Iron in urine has been determined by Zettner and Mansback 6S) by direct aspiration, and by Devoto 66) following digestion with sulfuric acid and extraction of the iron with a 3.3 % solution of thenoyltrifluoroacetone in MIBK. 

Thallium metal, 24 627—629 Thallium nitrates, 24 633 Thallium organometallics, 24 633—635 Thallium oxides, 24 632—633 Thallium poisonings, 24 637, 638-639 Thallium stress test, 24 629 Thallium sulfates, 24 628, 633 Thaumatin, 72 43, 24 241-242 Thaumatin II, 24 242 Theaspiranes, 24 572 Thebaine, 2 89 Thenardite, 22 863, 5 785t Thenoyltrifluoroacetone molecular formula, 5 712t Theobroma cacao, 6 350 Theobromine, 2 105-106... 

A broad range of metal centers have been used for the complexation of functional ligands, including beryllium [37], zinc, transition metals such as iridium [38], and the lanthanide metals introduced by Kido [39], especially europium and terbium. Common ligands are phenanthroline (phen), bathophenanthrolin (bath), 2-phenylpyridine (ppy), acetylacetonate (acac), dibenzoylmethanate (dbm), and 11 thenoyltrifluoroacetonate (TTFA). A frequently used complex is the volatile Eu(TTFA)3(phen), 66 [40]. 

Fig. 4.2 Synergistic extraction Distribution of U(VI) between 0.01 M HNO3 and mixtures of thenoyltrifluoroacetone (TTA) and tributylphosphate (TBP), or tributylphos-phineoxide (TBPO), at constant total molarity ([TTA] ,g plus [TBP] rg or [TBPO] ,g = 0.02 M) in cyclohexane. (From Ref. 2.)...

Sodium diediyldithiocarbamate. Mono(2-ediylhexyl)phosphoric acid. Thenoyltrifluoroacetone. 

Equation (4.41) is valid only when the complexes MA ° can be neglected in the aqueous phase. Comparing Eqs. (4.37b) and (4.41c), it is seen that no horizontal asymptote is obtained even at high concentrations of AT or HA and H. Thus, for very large distribution constant of the uncharged complex (i.e., >1000) a straight line with slope -z is experimentally observed, as in the case for the Cu(II)-thenoyltrifluoroacetone (HTTA) system (Appendix D 5g). 

Fig. 4.21 Distribution constants, Ky)c, for uncharged metal complexes MA vs. distribution constants for the corresponding undissociated acid ligand HA solid circles Zn(II), solid triangles Co(III). Variation with ligand composition HFA hexafluoroace-tylacetone, TFA trifluoroacetylacetone, AA acetylacetone, FTA 2-furoyltrifluoroacetone, TTA 2-thenoyltrifluoroacetone, PTA pivaloyltrifluoroacetone, BFA benzoyltrifluoroace-tone, BZA benzoylacetone. (From Ref. 36.)... 

It should be noted here that the variable temperature data presented for Np02 in Fig. 6 are close to those reported by Glebov et al. (43) but that the relaxivities presented in this figure for PuOl are different from those published by these authors (44) (the concentration of the PuO is uncertain in this reference). It has already been mentioned that special care must be taken in the preparation of solutions of plutonyl salts to avoid the presence of lower oxidation states. UV-visible spectroscopy (27) and liquid scintillation detectors (50) are particularly useful to assess the concentration and the nature of Pu species in solution. The purity of the PuO can also be tested by liquid liquid extraction with thenoyltrifluoroacetone, an agent known to be able to extract Pu" " from acidic aqueous phases but unable to extract PuO + (51). 

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