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One pot-synthesis of the fourth category of dinuclear molybdenum(VI) oxalate series: Structure and study of thermal and redox properties

Sarr, Bougar and Mbaye, Abdou and Diop, Cheikh A.K. and Sidibe, Mamadou and Melin, Frédéric and Hellwig, Petra and Maury, Francis and Senocq, François and Guionneau, Philippe and Giorgi, Michel and Gautier, Romain One pot-synthesis of the fourth category of dinuclear molybdenum(VI) oxalate series: Structure and study of thermal and redox properties. (2019) Inorganica Chimica Acta, 491. 84-92. ISSN 0020-1693

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Official URL: https://doi.org/10.1016/j.ica.2019.03.037


Three new dinuclear molybdenum(VI) oxalate (Pr2NH2)4·[Mo2O6(C2O4)2] (1), (iPr2NH2)4·[Mo2O6(C2O4)2] (2) and (HDabco)4[Mo2O6(C2O4)2]·2H2O (3) compounds, have been prepared by one pot-synthesis at room temperature and characterized by single crystal X-ray diffraction and vibrational spectroscopies. Each compound contains the binuclear [Mo2O6(C2O4)2]4− anion where each molybdenum is in an octahedral MoO6 environment. In compound (3), the interconnection between [Mo2O6(C2O4)2]4− anions, [HDabco]+ cations and water molecules (H2O) leads to an infinite inorganic-organic chain structure. Similarly, in compounds (1) and (2) the interactions between [Mo2O6(C2O4)2]4− anions and respectively [Pr2NH2]+ and [iPr2NH2]+ cations leads to an infinite inorganic-organic chain structure. A remarkable difference between the compounds is that in compounds (1) and (2) interactions between the chains involve only Van der Waals forces giving rise to layer-like structures, which also interact between them only by Van der Waals forces, whereas in compound (3) the chains interact also through hydrogen bonds giving a 3D supramolecular structure. The thermal properties of the compounds were investigated through thermogravimetric and differential thermal analyzes. The differences in the thermal decomposition of the compounds in the solid state are discussed in relation with their crystal structure. Cyclic voltammetry shows that the [Mo2O6(C2O4)2]4− anion can be reduced in both aprotic solvent and water.

Item Type:Article
HAL Id:hal-02098234
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Aix-Marseille Université - AMU (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Other partners > Université Cheikh Anta Diop - UCAD (SENEGAL)
Other partners > Université de Strasbourg - UNISTRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Ecole Centrale Marseille (FRANCE)
Other partners > Université Assane Seck de Ziguinchor - UASZ (SENEGAL)
Other partners > Université de Bordeaux (FRANCE)
Laboratory name:
Deposited On:12 Apr 2019 12:51

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