(EnH2)2[V2O2(O2)4(μ-C2O4)] — The vanadium(V) oxalato oxido peroxido complex with a bridging oxalato group
Mária Grešnerováa, Jana Chrappováa, 
, 
, Peter Schwendta, Jozef Tatierskya and Zdirad Žákb
a Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina, 842 15, Bratislava 4, Slovak Republic
b Department of Chemistry, Faculty of Natural Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
Received 9 March 2011;
accepted 1 June 2011.
Available online 12 June 2011.
Abstract
The oxalato complex (EnH2)2[V2O2(O2)4(μ-C2O4)] (where En = ethane-1,2-diamine) has been prepared and characterised by elemental analysis, infrared and Raman spectra and single crystal X-ray analysis. The crystal structure is stabilised by an extensive network of simple, bi-, tri- or tetrafurcated N
H···O hydrogen bonds which is supposed to have a significant role in stabilising the dinuclear solid state structure of the [V2O2(O2)4(μ-C2O4)]4− anion. The 51V NMR spectrum showed that the dinuclear complex is decomposing immediately after its dissolution in water.
Graphical abstract
The choice of a proper counter cation facilitated the preparation of the first peroxidovanadium complex with bridging oxalato(2−) group.
