Synthesis and crystal structure of two copper(II) complexes with coordinated decavanadate ion

Two new compounds containing decavanadate ions coordinated to copper centers, (2-hepH+)2[{Cu(H2O)2(O,N-2-hep)}2V10O28]·6H2O (2-hepH+ = 2-(2-hydroxyethyl)pyridinium; 2-hep = 2-(2-hydroxyethyl)pyridine) (1), [{Cu(2-amp)2(H2O)}2H2V10O28]·4H2O (amp = 2-(aminomethyl)pyridine) (2), have been prepared and characterized by elemental analyses and IR spectroscopy. The structure of 1 consists of trinuclear units [{Cu(H2O)2(O,N-2-hep)}2V10O28]2−, 2-hepH+ cations and molecules of water of crystallization. A trinuclear unit [{Cu(2-amp)2(H2O)}2H2V10O28] is a principal part also in the structure of 2, but the bonds of decavanadate group to the copper complexes are much weaker than in 1.

Graphical abstractTwo new compounds containing decavanadate ions in the role of bridging ligands coordinated to copper centers, (2-hepH+)2[{Cu(H2O)2(O,N-2-hep)}2(V10O28)]·6H2O (2-hepH+ = 2-(2-hydroxyethyl)pyridinium; 2-hep = 2-(2-hydroxyethyl)pyridine) and {[Cu(2-amp)2(H2O)]2H2V10O28}·4H2O (amp = 2-(aminomethyl)pyridine), have been prepared and characterized by elemental analyses, IR and NMR spectroscopy and X-ray structure determination.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Two new compounds with coordinated decavanadate anion. ► The shortest Cu–O(decavanadate) bond found until now. ► Trinuclear unit in both compounds consisting of bridging decavanadate ligand and two copper complexes.