title: Tetrapalladium-containing polyoxotungstate [Pd(II)4(α-P2W15O56)2]16-: a comparative study.
abstract: The novel tetrapalladium(II)-containing polyoxometalate [Pd(II)4(α-P2W15O56)2](16-) has been prepared in aqueous medium and characterized as its hydrated sodium salt Na16[Pd4(α-P2W15O56)2]·71H2O by single-crystal XRD, elemental analysis, IR, Raman, multinuclear NMR, and UV-vis spectroscopy. The complex exists in anti and syn conformations, which form in a 2:1 ratio, and possesses unique structural characteristics in comparison with known {M4(P2W15)2} species. (31)P and (183)W NMR spectroscopy are consistent with the long-term stability of the both isomers in aqueous solutions.
authors.affiliation: Peter Grünberg Institute-PGI 6 and ‡Central Institute for Engineering, Electronics and Analytics-ZEA-3, Forschungszentrum Jülich , D-52425 Jülich, Germany.
authors.forename: Natalya V
authors.initials: NV
authors.lastname: Izarova
authors.forename: Raisa I
authors.initials: RI
authors.lastname: Maksimovskaya
authors.forename: Sabine
authors.initials: S
authors.lastname: Willbold
authors.forename: Paul
authors.initials: P
authors.lastname: Kögerler