Adducts technetium

The adducts Mn(S2PBu12)2(bipy) and Mn PBu Cphen) are octahedral and in solid state form supramolecular architectures through n—n interactions between the aromatic heterocyclic ligands.106 Technetium derivatives, important for radiological imaging, such as " TcN(S2PR2)2 (R = Me, Et, Pr, /-Pr), have been described.107... 

Elemental analysis, fullerene adducts, 44 21 Elemental technetium, see Technetium Element displacement principle, 28 167-198 applications, 28 172-176 theory, 28 169-171 Elements... 

Partition behaviour of americium(III) chelates with cupferron and other bidentate reagents was studied spectrophotometrically between a number of inert solvents and dilute HC104 solutions.98 Of special interest may be the data on their extractability and colours of chloroform extracts, collected in a tabular form for cupferronate derivatives of 58 metals. The pH ranges for the formation of cupferronates of 39 metal ions have been shown graphically in this publication.99 Solvent extraction and polarographic techniques were employed to study the possible adducts between technetium and cupferron.100 Evidence indicates a Tcm cupferronate and possibly a pertechnitate adduct, but no indication of a technetium(IV) complex was obtained. 

No binary xanthate structures of manganese, technetium, or rhenium have been reported. Indeed, there are relatively few crystal structures known with only a single manganese structure (two polymorphs), two phosphine adducts of technetium and three structures containing rhenium, two of which are dinuclear. 

An alternative approach to cationic myocardial imaging agents has been the development of neutral seven-coordinate Tc(III) complexes based on 1,2-dioxime ligands (dioximeH2) with one end capped by a boronic acid derivative (19, 253). These complexes are generally referred to as BATOs (boronic acid adducts of technetium dioximes) and have the general structure [TcX(dioximeH)2(dioxime)BR ] (X = Cl, Br R = alkyl) shown in 18. 

Dioxime type ligands can be considered as Schiff base bischelates (Deutsch et al. 1978 Bandoli et al. 1986). The first complexes with oxime ligands were described as mono-capped Tc(dioxime)3(//OH)SnCl3 (dioxime = dimethylglyoxime) complexes (Treher et al. 1989). The boronic adducts of technetium oximes - (BATOs) (Fig. 2.1.19) - were well characterized, and some could be used both as myocardial and cerebral perfusion agents. The complexes are neutral technetium is coordinated to three N-bonded dioxime molecules and to one Cl or Br atom in an axial position (seven covalent bonds). 

Nunn AD, Treher EN, Feld T (1986) Boronic acid adducts of technetium oxime complexes (BATOs), a new class of neutral complexes with myocardial imaging capabilities. J Nucl Med 27 893 Pasqualini R, Comazzi V, Bellande E, Duatti A, March A (1992) A new efficient method for the preparation of " Tc-radiopharmaceuticals containing the Tc = N multiple bond. Int J Appl Radial Isot 43 1329-1333... 

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