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Synthesis, characterization and electrochemical studies on technetium(V) and rhenium(V) oxo-complexes with N,N?-2-hydroxypropane-1,3-bis(salicylideneimine) (Articolo in rivista)

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Synthesis, characterization and electrochemical studies on technetium(V) and rhenium(V) oxo-complexes with N,N?-2-hydroxypropane-1,3-bis(salicylideneimine) (Articolo in rivista) (literal)

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Tisato F.; Refosco F.; Mazzi U.; Bandoli G.; Dolmella A. (1989)
Synthesis, characterization and electrochemical studies on technetium(V) and rhenium(V) oxo-complexes with N,N?-2-hydroxypropane-1,3-bis(salicylideneimine)
in Inorganica Chimica Acta (Testo stamp.); Elsevier, Amsterdam (Paesi Bassi)
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1-2 Istituto di Chimica e Tecnologia dei Radioelementi, C.N.R., Corso Stati Uniti 4, 35020 Padua, Italy 3-5 Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, 35131 Padua, Italy (literal)

Titolo

Synthesis, characterization and electrochemical studies on technetium(V) and rhenium(V) oxo-complexes with N,N?-2-hydroxypropane-1,3-bis(salicylideneimine) (literal)

Abstract

Ligand-exchange reactions of potential quinquedentate Schiff base ligands derived from salicylaldehyde and 1,3-diamino-2-hydroxypropane (H3L) with [MOCl4]- (M = Tc and Re) have been investigated. The complexes [MOCl2(ROH)(H2L·HCl)] (I) (R = Me, Et), [ReOCl(HL)] (II) and ?-O[MO(HL)]2 (III) were synthesized and characterized by the usual physicochemical measurements. Cyclic voltammetries for both III complexes reveal two separate and single-electron redox processes. The crystal structure of ?-O[TcO(HL)]2 was determined by single-crystal X-ray diffraction methods. Crystals are monoclinic, space group P21/c, with a = 9.423(6), b = 19.666(9), c = 22.785(11) Å, ? = 99.41(4)° and Z = 4. X-ray diffraction provides 2842 observed reflections (up to ? = 40°) and the structure has been refined by full-matrix least-squares methods to R = 0.10. The 'dimeric' structure of ?-O[TcO(HL)]2 consists of two distorted octahedral TcO(HL) moieties bridged by an oxygen atom which occupies the sixth coordination site of each moiety with the TcOTc angle nearly linear (173°). (literal)

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