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Oxo-rhenium(V) compounds bis(3,5-dimethylpyrazol-1-yl)acetate containing scorpionate ligand (Articolo in rivista)

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Oxo-rhenium(V) compounds bis(3,5-dimethylpyrazol-1-yl)acetate containing scorpionate ligand (Articolo in rivista) (literal)

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Marina Porchia; Grazia Papini; Carlo Santini; Giancarlo Gioia Lobbia; Maura Pellei; Francesco Tisato; Giuliano Bandoli; Alessandro Dolmella (2006)
Oxo-rhenium(V) compounds bis(3,5-dimethylpyrazol-1-yl)acetate containing scorpionate ligand
in Inorganica Chimica Acta (Testo stamp.); Elsevier Science SA, Lausanne (Svizzera)
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Marina Porchia; Grazia Papini; Carlo Santini; Giancarlo Gioia Lobbia; Maura Pellei; Francesco Tisato; Giuliano Bandoli; Alessandro Dolmella (literal)

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ICIS, CNR, Padova / Department of Chemical Sciences, University of Camerino / Department of Chemical Sciences, University of Camerino / Department of Chemical Sciences, University of Camerino / Department of Chemical Sciences, University of Camerino / ICIS, CNR, Padova / Department of Pharmaceutical Sciences, University of Padova / Department of Pharmaceutical Sciences, University of Padova (literal)

Titolo

Oxo-rhenium(V) compounds bis(3,5-dimethylpyrazol-1-yl)acetate containing scorpionate ligand (literal)

Abstract

Ligand-exchange reactions of bidentate donor agents such as malonic acid (H2 mal) or 1,3-propanediol (H2 diol) with labile Re(O)(bdmpza)Cl2 (bdmpza = bis(3,5-dimethylpyrazol-1-yl)acetate) precursors in the presence of triethylamine yield the mixed-ligand complexes Re(O)(bdmpza)(mal) (2) and Re(O)(bdmpza)(diol) (3), respectively. Compounds 2 and 3 can also be obtained starting directly from [Re(O)Cl4 ][NBu4 ], Libdmpza and the appropriate bidentate ligand in the presence of triethylamine. X-ray analyses of the two compounds show in both cases a distorted octahedral geometry around the rhenium atom comprising two pyrazolyl nitrogens and the bidentate ligand in the equatorial plane, and the oxo and the carboxylate oxygens on the apices. Differently from 2 and 3, X-ray diffraction analysis of the asymmetric precursor (O C-6-42)Re(O)(bdmpza)Cl2 (1) reveals a slightly distorted octahedral geometry with the apical positions taken by the carboxylate oxygen and a chloride atom, and with the equatorial plane occupied by the nitrogens of the bis-pyrazolyl ligand, a chloride and the oxygen atom. (literal)

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