Volume 627, Issue 2 pp. 180-185
Article

Reactions of Chalcogen Oxide Chlorides EOCl2 (E = S, Se) with Group 5 Metal Chlorides

Fausto Calderazzo

Fausto Calderazzo

Pisa/Italy, Dipartimento di Chimica e Chimica Industriale, Università di Pisa

Search for more papers by this author
Michele D'Attoma

Michele D'Attoma

Pisa/Italy, Dipartimento di Chimica e Chimica Industriale, Università di Pisa

Search for more papers by this author
Guido Pampaloni Prof.

Corresponding Author

Guido Pampaloni Prof.

Pisa/Italy, Dipartimento di Chimica e Chimica Industriale, Università di Pisa

Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Vis Risorgimento 35, I-56126 Pisa/ItalySearch for more papers by this author
Sergei I. Troyanov

Sergei I. Troyanov

Moscow/Russia, Department of Chemistry, Moscow State University

Search for more papers by this author

Abstract

en

The tantalum derivative TaCl5(SOCl2), thermally unstable above 290 K, was prepared from Ta2Cl10 and SOCl2 and studied by X-ray crystallography at 180 K. Tantalum atom is octahedrally coordinated by five chlorides at Ta–Cl distances comprised between 2.32 and 2.36 Å and by the oxygen atom of SOCl2 at the Ta–O distance of 2.34 Å. No evidence for the existence of an analogous compound of niobium(V) has been obtained. The halides of Group 5, M2Cl10, M = Nb, Ta, react with SeOCl2 to give the solid adducts MCl5(SeOCl2) stable at room temperature. The reaction of NbCl5(SeOCl2) with SOCl2 affords [SeCl3][NbCl6] which contains trigonal-pyramidal (SeCl3)+ cations with Se–Cl distances of 2.13–2.16 Å and octahedral [NbCl6] anions (Nb–Cl: 2.27–2.45 Å). A distorted octahedral coordination around the selenium atom is achieved by additional interactions [Se…Cl, 2.81–2.98 Å] between selenium and the [NbCl6] anion.

Abstract

de

Reaktionen von Chalkogenoxochloriden EOCl2 (E = S, Se) mit Metallpentachloriden

Der oberhalb 290 K nicht stabile Tantalkomplex TaCl5(SOCl2) wurde bei tiefen Temperaturen aus Ta2Cl10 und SOCl2 synthetisiert und kristallographisch charakterisiert. Das Tantal-Atom ist oktaedrisch von fünf Cl-Atomen und einem O-Atom koordiniert, wobei die Abstände Ta–Cl 2.32–2.35 Å und Ta–O 2.34 Å betragen. Es wurde kein Hinweis auf die Existenz des analogen Niobium(V)-Komplexes erhalten. Die Chloride M2Cl10 (M = Nb, Ta) reagieren mit SeOCl2 unter Bildung von MCl5(SeOCl2). Bei der Reaktion von NbCl5(SeOCl2) mit SOCl2 bildet sich [SeCl3][NbCl6] mit trigonal-pyramidalen (SeCl3)+-Kationen (Se–Cl 2.13–2.16 Å) und oktaedrischen [NbCl6]-Anionen (Nb–Cl 2.27–2.45 Å). Die zusätzliche schwache Wechselwirkung zwischen Selen-Atom und [NbCl6]-Anionen mit den Se…Cl-Abständen zwischen 2.81 und 2.98 Å trägt zur Bildung von stark verzerrter oktaedrischer Koordination der Se-Atome bei.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.