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Double salt crystal structure of nona-sodium dihydrogen nona-vanadoplatinate(IV) tri-hydrogen nona-vanadoplatinate(IV) tetra-contahydrate: stepwise-protonated nona-vanadoplatinate(IV).

ABSTRACT: Nonavanadoplatinate [Pt(IV)V9O28](7-), which is the first heteropolyoxovanadate in the deca-vanadate framework, [V10O28](6-), has been investigated crystallographically. The title compound, Na9[H2Pt(IV)V9O28][H3Pt(IV)V9O28]·40H2O, was obtained by a hydro-thermal reaction at pH = 2. This compound contains two different protonated heteropolyoxovanadates, [H2Pt(IV)V9O28](5-) [polyanion (A)] and [H3Pt(IV)V9O28](7-) [polyanion (B)]. The locations of the H atoms on the protonated O atoms were observed in difference Fourier maps and confirmed by the inter-polyanion hydrogen bonds, bond-length elongation and bond-valence-sum (VBS) analysis. The two (Pt and V)-bound μ2-O atoms are protonated in both polyanions. The position of the third protonated O atom in polyanion (B) is an inter-esting feature of the structure, being located on one (V2)-bound μ2-O atom. The discrete heteropolyanions form a dimer, {H5[PtV9O28]2}(9-), through five inter-polyanion hydrogen bonds. Additional O-H⋯O hydrogen bonds and interactions between Na(+) cations and water molecules as well as terminal O atoms of one of the polyanions consolidate the crystal packing.

SUBMITTER: Joo HC

PROVIDER: S-EPMC4518920 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Anhydrous penta-guanidinium dihydrogen nona-vanado(IV)platinate(IV).

Project description:The title compound, (CH(6)N(3))(5)[H(2)PtV(9)O(28)], containing the nona-vanadoplatinate(IV) polyanion, was obtained by hydro-thermal reaction. The polyanion has approximate C(2v) symmetry. The two Pt-bound ?(2)-O atoms are protonated in the polyanion. The heteropolyanions form inversion-generated dimers, {[H(2)PtV(9)O(28)](2)}(10-), held together by each of the two ?(2)-O-H??(2)-O and ?(2)-O-H??(3)-O hydrogen bonds. The guanidinium cations are hydrogen bonded with the ?(2)- and terminal O atoms of the polyanion, connecting the polyanions into a three-dimensional network.

| S-EPMC3238708 | biostudies-literature

Double salt crystal structure of hexa-sodium hemiundeca-hydrogen α-hexa-molybdoplatinate(IV) heminona-hydrogen α-hexa-molybdoplatinate(IV) nona-cosa-hydrate: di-hydrogen disordered-mixture double salt.

Project description:The title double salt containing two distinct, differently protonated hexa-molybdoplatinate(IV) polyanions, Na6[H5.5 α-PtMo6O24][H4.5 α-PtMo6O24]·29H2O, has been synthesized by a hydro-thermal reaction at ca pH 1.80. The positions of the H atoms in the polyanions were established from difference Fourier maps and confirmed by the inter-polyanion hydrogen bonds, bond-distance elongation, and bond-valence sum (BVS) calculations. The fractional numbers of H atoms in each polyanion are required for charge balance and in order to avoid unrealistically short H⋯H distances in the inter-polyanion hydrogen bonds. Considering the disorder, the refined formula of the title polyanion, {[H5.5 α-PtMo6O24]; polyanion (A) and [H4.5 α-PtMo6O24]; polyanion (B)}(6-), can be rewritten as a set of real formula, viz. {[H6 α-PtMo6O24]; polyanion (A). [H4 α-PtMo6O24]; polyanion (B)}(6-) and {[H5 α-PtMo6O24]; polyanion (A). [H5 α-PtMo6O24]; polyanion (B)}(6-). The polyanion pairs both form dimers of the same formula, viz. {[H10 α-Pt2Mo12O48]}(6-) connected by seven inter-polyanion O-H⋯O hydrogen bonds.

| S-EPMC4647359 | biostudies-literature

Crystal structure of penta-potassium di-hydrogen nona-vanadato(V)platinate(IV) nona-hydrate.

Project description:The title compound, K5[H2PtV9O28]·9H2O, containing the nona-vanado-platinate(IV) polyanion, was obtained by hydro-thermal reaction at pH = 4.2. The polyanion has approximate mm2 (C 2v ) symmetry. The two platinum-bound μ2-O atoms are protonated in the polyanion. The heteropolyanions form inversion-generated dimers, {[H2PtV9O28]2}(10-), held together by μ2-O-H⋯μ2-O and μ2-O-H⋯μ3-O hydrogen bonds. All K(+) cations are located on general positions of the space group P-1.

| S-EPMC4459313 | biostudies-literature

Redetermination of hepta-potassium nona-hydrogen bis-[?-hexa-molybdoplatinate(IV)] undeca-hydrate.

Project description:Previously reported at a temperature of 298?(2)?K [Lee & Joo (2007 ?). Acta Cryst. E63, i11-i13], the title compound, K(7)[H(9)?-Pt(2)Mo(12)O(48)]·11H(2)O or K(7)[H(4.5)?-PtMo(6)O(24)](2)·11H(2)O, was redetermined at 146?(2)?K in order to determine whether the H atom in the hydrogen bond that crosses the center of symmetry was located at the center of symmetry or disordered around it as assumed in the previous study. During the present low-temperature study it was found on the center of symmetry. One water molecule shows half-occupancy.

| S-EPMC2984051 | biostudies-literature

Crystal structure of hepta-guanidinium nona-hydrogen bis-[α-hexa-molybdoplatinate(IV)] hepta-hydrate.

Project description:The title compound, (CH6N3)7H9[PtMo6O24]2·7H2O, containing the well-known Anderson-type heteropolyoxomolybdate, was obtained by recrystallization of its powdered guanidinium salt. The protonated O atoms in the polyanion were confirmed by electron-density maps, inter-polyanion hydrogen bonds and bond-valance sums (BVS). The {[H4.5PtMo6O24]2}(7-) polyanion is the same as that already characterized in K7[H4.5PtMo6O24]2·11H2O [space group P-1; Lee & Joo (2010 ▶). Acta Cryst. E66, i8-i9]. The heteropolyanions form inversion-generated dimers, {[H4.5PtMo6O24]2}(7-), held together by each of the four μ3-O-H⋯μ1-O, two μ2-O-H⋯μ2-O hydrogen bonds and one centrosymmetric μ3-O-H-μ3-O hydrogen bond. The H atom of the centrosymmetric hydrogen bond is located on an inversion centre. One guanidinium ion and one water mol-ecule are equally disordered about a twofold rotation axis.

| S-EPMC4350731 | biostudies-literature

trans-Tetra-iodidobis(tri-p-tolyl-phosphine oxide-?O)tin(IV).

Project description:The centrosymmetric title compound, [SnI(4)(C(21)H(21)OP)(2)], is a monomeric complex that displays a nearly octa-hedral coordination of tin(IV), with an Sn-O bond distance of 2.159?(2)?Å and an average Sn-I bond distance of 2.79?(3)?Å.

| S-EPMC2960702 | biostudies-literature

Poly[tetra-butyl-tetra-kis-(μ(2)-hydrogen phenyl-phospho-nato)ditin(IV)].

Project description:In the title compound, [Sn(2)(C(4)H(9))(4)(C(6)H(6)PO(3))(4)](n), the basic unit is a dimer containing two symmetry-related Sn(IV) atoms bridged by two hydrogenphenylphosphonate anions. This fragment is located about an inversion center, and each Sn(IV) atom is linked to two other hydrogenphenylphosphonate anions, giving a layered structure parallel to (010). The coordination geometry for the Sn(IV) atoms is close to octa-hedral. The layers are connected via O-H⋯O hydrogen bonds, generating a three-dimensional network. One butyl group is disordered over two sets of sites, with occupancies of 0.49 (2) and 0.51 (2).

| S-EPMC3515099 | biostudies-literature

Tetra-methyl-ammonium dihydrogen phosphate hemihydrate.

Project description:In the crystal structure of the title compound, C(4)H(12)N(+)·H(2)PO(4) (-)·0.5H(2)O, the anions form an infinite hydrogen-bonded chain along the [10] direction. The anion chains are connected by water mol-ecules, which lie on crystallographic twofold rotation axes, through O-H?O hydrogen bonds. These hydrogen bonds are almost perpendicular to the other hydrogen bonds which create an assembled structure of anions. In addition, C-H?O hydrogen bonds between anions and cations are observed.

| S-EPMC2968790 | biostudies-literature

6,10,16,19-Tetra-oxatrispiro-[4.2.2.4.2.2]nona-deca-ne.

Project description:The asymmetric unit of the title compound, C(15)H(24)O(4), contains one half-mol-ecule; a twofold rotation axis passes through the central C atom. The non-planar six- and five-membered rings adopt chair and envelope conformations, respectively. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules.

| S-EPMC2960158 | biostudies-literature

Hydrogen bonding in cytosinium dihydrogen phosphite.

Project description:In the title compound, C(4)H(8)N(3)O(4)P(+)·H(2)PO(3) (-), the cytosine mol-ecule is monoprotonated and the phospho-ric acid is in the monoionized state. Strong hydrogen bonds, dominated by N-H⋯O inter-actions, are responsible for cohesion between the organic and inorganic layers and maintain the stability of this structure.

| S-EPMC2977815 | biostudies-literature

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