Volume 628, Issue 9-10 pp. 2113-2117
Artikel

A Series of Molybdenum(VI) Complexes with Tridentate Schiff Base Ligands

Marina Cindrić Dr.

Corresponding Author

Marina Cindrić Dr.

Zagreb/Croatia, Chemistry Department, Faculty of Science, University of Zagreb

Chemistry Department, Faculty of Science, University of Zagreb, Ul. kralja Zvonimira 8, 10000 Zagreb/Croatia, Fax: +385-1-46 11 191Search for more papers by this author
Neven Strukan

Neven Strukan

Zagreb/Croatia, Chemistry Department, Faculty of Science, University of Zagreb

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Višnja Vrdoljak

Višnja Vrdoljak

Zagreb/Croatia, Chemistry Department, Faculty of Science, University of Zagreb

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Tanja Kajfež

Tanja Kajfež

Zagreb/Croatia, Chemistry Department, Faculty of Science, University of Zagreb

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Boris Kamenar

Boris Kamenar

Zagreb/Croatia, Chemistry Department, Faculty of Science, University of Zagreb

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Abstract

en

Mononuclear and polynuclear dioxomolybdenum(VI) complexes with Schiff base ligands have been prepared by the reaction of [MoO2(acac)2] with salicylaldehyde (1 and 4), 2-hydroxy-1-naphthaldehyde (2 and 5) and 2-hydroxy-3-methoxybenzaldehyde (3 and 6) with addition of appropriate amine. All prepared complexes of the general formulae [MoO2LD] and [MoO2L]n consist of cis-MoO22+ core coordinated by Schiff-base ligand (L) in a tridentate manner through two deprotonated hydroxyl groups and one imino nitrogen. The usual octahedral coordination around molybdenum atom is completed by monodentate solvent molecules D (methanol, ethanol or dimethylsulphoxide). All compounds were characterized by means of chemical analysis, IR spectroscopy, thermogravimetric analysis and some of them by X-ray crystallography (1a, 2c, 3a, 4c and 6c).

Abstract

de

Eine Reihe von Molybdän(VI)-Komplexen mit dreizähnigen Schiff-Basen-Liganden

Ein- und vielkernige Dioxomolybdän(VI)-Komplexe mit Schiff-Basen-Liganden wurden durch Reaktion von [MoO2(acac)2] mit Salicylaldehyd (1 und 4), 2-Hydroxy-1-naphthaldehyd (2 und 5) und 2-Hydroxy-3-methoxybenzaldehyd (3 und 6) durch Zugabe von Amin hergestellt. Alle Komplexe der allgemeinen Formeln [MoO2LD] und [MoO2L]n enthalten die cis-MoO22+-Einheit, die durch die Schiff-Basen-Liganden dreifach durch zwei deprotonierte Hydroxyl-Gruppen und durch ein Imino-Stickstoffatom koordiniert ist. Die übliche oktaedrische Koordination am Molybdänatom wird durch einzähnige Solvens-Moleküle D (Methanol, Ethanol oder Dimethylsulfoxid) ergänzt. Alle Verbindungen werden durch Elementaranalysen, IR-Spektren, thermogravimetrische Analysen und einige von ihnen durch Kristallstrukturanalysen (1a, 2c, 3a, 4c und 6c) charakterisiert.

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