Crystal structure of hexasodium tetraserinolium paratungstate B decahydrate, [Na₆{(CH₂OH)₂CHNH₃}₄][W₁₂O₄₀(OH)₂]·10H₂O

Abstract

The title polyoxometalate-based organic–inorganic hybrid compound, [Na6(C3H10NO2)4][W12O40(OH)2]·10H2O, consists of a di-μ 3-hydroxido-tetra-μ 3-oxido-octadeca-μ-oxido-octadecaoxidododecatungstate (paradodecatungstate B) anion, [W12O40(OH)2]10–, and six sodium cations coordinated by the oxygen ions of the polyanions, serinol ligands protonated at the N atom, and water molecules. The centrosymmetric paratungstate B anion shows characteristic features in terms of bond lengths and angles. The three-dimensional framework structure is established by bonding of the sodium cations with oxygen ions of the paratungstate B anions and a network consisting of N—H...O and O—H...O hydrogen bonds of medium strength between the protonated serinol cations, water molecules and the paratungstate B anions. The title compound was also characterized by means of elemental analysis, IR spectroscopy and thermogravimetric analysis.

Heteroelements in polyoxometalates: a study on the influence of different group 15 elements on polyoxometalate formation

“…4). [38][39][40][41] It is composed of four corner-linked WO 6 triads, with the linking of the triads resulting in a large cavity inside the structure. Important bond lengths of our investigated structural motifs are summarized in Table 1.…”