Crystal structure of two salts derived from paratungstate in the [H2W12O42]10− anion

Structure and Thermal Transformations of Methylammonium Tungstate

“…Colorless single crystals suitable for X‐ray structure analysis were obtained by slow ethanol diffusion into an aqueous solution of solid E. The XRD analysis revealed that [H 2 W 12 O 42 ] 10− crystallized in the triclinic space group 1 bar together with ten methylammonium counter‐cations and twelve water molecules (Table 2), which is same to the crystal structure of (CH 3 NH 3 ) 10 [H 2 W 12 O 42 ] ⋅ 12H 2 O reported by Morajkar and Srinivasan [27] . The [H 2 W 12 O 42 ] 10− anion is structurally identical to the anions of (NH 4 ) 10 [H 2 W 12 O 42 ] ⋅ 4H 2 O, [33] (NH 4 ) 7 [Bi(H 2 W 12 O 42 )] ⋅ 20H 2 O, [35] and Na 2 (NH 4 ) 8 [H 2 W 12 O 42 ] ⋅ 12H 2 O [36] . The [H 2 W 12 O 42 ] 10− anion consists of two HW 3 O 13 groups and two W 3 O 14 groups that are connected by corner sharing.…”

Iron(II) and copper(II) paratungstates B: a single-crystal X-ray diffraction study

“…One of the most common isopolytungstates (IPOTs) is paratungstate B, built of the [W 12 O 40 (OH) 2 ] 10À anion that is stable in aqueous acidic solution and exhibits a cluster-like construction of 12 W-centred distorted octahedra (Evans & Rollins, 1976;Pope, 1983). Due to a high surface charge density, the paratungstate anion acts as a multidentate ligand, which can coordinate alkaline (Peresypkina et al, 2014) and transition-metal cations (Radio et al, 2010(Radio et al, , 2011Gumerova et al, 2015), and also act as a precursor (Sokolov et al, 2012). By coordinating transitionmetal cations, paratungstates can form high-dimensional extended structures, which exhibit unique catalytic (He et al, 2008;Chen et al, 2017) and magnetic properties (Li et al, 2008(Li et al, , 2009.…”

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

“…The [W 12 O 40 (OH) 2 ] 10paratungstate B anion is stable in aqueous acidic solution and has a cluster-like structure of twelve W-centered distorted octahedra {WO 6 } (Evans & Rollins, 1976;Pope, 1983). Due to its high surface charge density q/m = 0.83 (q = net charge, m = number of metal ions), the paratungstate B anion can act as a multidentate ligand for alkaline (Peresypkina et al, 2014) or transition-metal cations (Radio et al, 2010(Radio et al, , 2011Gumerova et al, 2015Gumerova et al, , 2018 and as a precursor for the synthesis of catalytically active sandwich-type polyoxotungstates (POTs) (Sokolov et al, 2012).…”