Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

A monoclinic polymorph of KY(PO(3))(4).

ABSTRACT: The title compound, potassium yttrium polyphosphate, KY(PO(3))(4), was synthesized using the flux method. The atomic arrangement consists of an infinite long-chain polyphosphate organization. Chains, with a period of four PO(4) tetra-hedra, run along the a-axis direction. Two other polymorphs of this phosphate are known, in space groups P21/n and C2/c.

SUBMITTER: Horchani-Naifer K

PROVIDER: S-EPMC2961604 | biostudies-literature | 2008 May

REPOSITORIES: biostudies-literature

ACCESS DATA

Json Xml

Publications

A monoclinic polymorph of KY(PO(3))(4).

Horchani-Naifer Karima K Jouini Anis A Férid Mokhtar M

Acta crystallographica. Section E, Structure reports online 20080517 Pt 6

The title compound, potassium yttrium polyphosphate, KY(PO(3))(4), was synthesized using the flux method. The atomic arrangement consists of an infinite long-chain polyphosphate organization. Chains, with a period of four PO(4) tetra-hedra, run along the a-axis direction. Two other polymorphs of this phosphate are known, in space groups P21/n and C2/c. ...[more]

PMID: 21202436

Similar Datasets

2-Pyridone: monoclinic polymorph.

Project description:The asymmetric unit in the title compound, C(5)H(5)NO, comprises two independent but virtually identical mol-ecules of 2-pyridone, and represents a monoclinic polymorph of the previously reported ortho-rhom-bic (P2(1)2(1)2(1)) form [Penfold (1953 ?). Acta Cryst.6, 591-600; Ohms et al. (1984 ?). Z. Kristallogr.169, 185-200; Yang & Craven (1998 ?). Acta Cryst. B54, 912-920]. The independent mol-ecules are linked into supra-molecular dimers via eight-membered {?HNC(O)}(2) amide synthons in contrast to the helical supra-molecular chains, mediated by {?HNC(O)} links, found in the ortho-rhom-bic form.

| S-EPMC2972078 | biostudies-literature

A monoclinic polymorph of theophylline.

Project description:A monoclinic polymorph of theophylline, C(7)H(8)N(4)O(2), has been obtained from a chloro-form/methanol mixture by evaporation under ambient conditions. The new polymorph crystallizes with two mol-ecules in the asymmetric unit. The structure features inter-molecular N-H?O hydrogen bonds, resulting in the formation of dimers between two crystallographically different mol-ecules; each mol-ecule acts as both donor and acceptor.

| S-EPMC3239002 | biostudies-literature

Dicyclo-hexyl-ammonium thio-cyanate: monoclinic polymorph.

Project description:The title salt, C(12)H(24)N(+)·NCS(-), represents a monoclinic polymorph of the previously reported ortho-rhom-bic form [Khawar Rauf et al. (2008 ?). Acta Cryst. E64, o366]. Two independent formula units comprise the asymmetric unit with the major difference in their mol-ecular structures relating to the relative dispositions of the cyclo-hexyl rings [dihedral angles = 79.88?(6) and 67.72?(5)°]. Further, the independent anions form distinctive patterns of hydrogen-bonding inter-actions, i.e. 2 × N-H?N versus N-H?N and N-H?S. The resulting supra-molecular architecture is a supra-molecular chain along the c axis based on a square-wave topology.

| S-EPMC3247581 | biostudies-literature

2-Benzyl-isoindoline-1,3-dione: a monoclinic polymorph.

Project description:In the molecule of the title compound, C(15)H(11)NO(2), the dihedral angle between the ring systems is 81.3?(2)°. In the crystal structure, mol-ecules are held together via C-H?O inter-actions.

| S-EPMC2915367 | biostudies-literature

Naphthalene-1,8-dicarb-oxy-lic anhydride: a monoclinic polymorph.

Project description:A new type of naphthalene-1,8-dicarb-oxy-lic anhydride, C(12)H(6)O(3), was synthesized hydro-thermally. Unlike the two previously reported polymorphs, which crystallize in the ortho-rhom-bic space groups P2(1)2(1)2(1) [Shok et al. (1971). Kristallografiya, 16, 500-502; Grigor'eva & Chetkina (1975). Kristallografiya, 20, 1289-1290] and Pbca [Shok & Gol'der (1970). Zh. Strukt. Khim.11, 939-940], this present structure crystallizes in the monoclinic space group P2(1)/c. In this structure, the planar [total puckering amplitude Q = 0.0362?(15)] mol-ecules lie parallel to each other along the a axis.

| S-EPMC2983304 | biostudies-literature

A monoclinic polymorph of 1-benzoyl-4-thio-biuret.

Project description:The title compound, C9H9N3O2S, is a monoclinic (C2/c) polymorph of the previously reported triclinic structure [Kang (2013 ?). Acta Cryst. E69, o1327]. The mol-ecule is almost planar with an r.m.s. deviation of 0.069?Å from the mean plane of all non-H atoms. The benzoyl and terminal thio-urea fragments adopt a transoid conformation with respect to the central carbonyl O atom. Two intra-molecular N-H?O hydrogen bonds are present. In the crystal, N-H?O and N-H?S inter-actions link the mol-ecules into zigzag chains extending along the c-axis direction.

| S-EPMC3885036 | biostudies-literature

2-(4-Fluoro-benzyl-idene)propane-dinitrile: monoclinic polymorph.

Project description:The title compound, C10H5FN2, is a monoclinic (P21/c) polymorph of the previously reported triclinic (P-1) form [Anti-pin et al. (2003 ?). J. Mol. Struct. 650, 1-20]. The 13 non-H atoms in the title polymorph are almost coplanar (r.m.s. deviation = 0.020?Å); a small twist between the fluoro-benzene and dinitrile groups [C-C-C-C torsion angle = 175.49?(16)°] is evident in the triclinic polymorph. In the crystal, C-H?N inter-actions lead to supra-molecular layers parallel to (-101); these are connected by C-F?? inter-actions.

| S-EPMC3629574 | biostudies-literature

A second monoclinic polymorph of methyl 4-hydroxy-benzoate.

Project description:A second monoclinic polymorph of methyl 4-hydroxy-benzoate, C(8)H(8)O(3), is reported. The unit-cell dimensions are different from those of the previously reported monoclinic form [Vujovic & Nassimbeni (2006 ?). Cryst. Growth Des.6, 1595-1597]. The asymmetric unit contains three crystallographically independent mol-ecules, as observed in the previous form. The crystal structure is stabilized by inter-molecular O-H?O and C-H?O hydrogen bonds and C-H?? inter-actions, which link the mol-ecules into a three-dimensional network.

| S-EPMC2961691 | biostudies-literature

The type IV polymorph of KEu(PO(3))(4).

Project description:Single crystals of KEu(PO(3))(4), potassium europium(III) polyphosphate, were obtained by solid-state reactions. This monoclinic form is the second polymorph described for this composition and belongs to type IV of long-chain polyphosphates with general formula A(I)B(III)(PO(3))(4). It is isotypic with its KEr(PO(3))(4) and KDy(PO(3))(4) homologues. The crystal structure is built of infinite helical chains of corner-sharing PO(4) tetra-hedra with a repeating unit of eight tetra-hedra. These chains are further linked by isolated EuO(8) square anti-prisms, forming a three-dimensional framework. The K(+) ions are located in pseudo-hexa-gonal channels running along [01] and are surrounded by nine O atoms in a distorted environment.

| S-EPMC2972142 | biostudies-literature

A second monoclinic polymorph of 3?-chloro-cholest-5-ene.

Project description:The title compound, C(27)H(45)Cl, is a second monoclinic polymorph which crystallizes in the space group P2(1) with four crystallographically independent mol-ecules in the asymmetric unit. The structure was previously reported [Bernal et al. (1940 ?). Philos. Trans. R. Soc. London Ser. B, 239, 135-182; Vani & Vijayan (1979 ?). Mol. Cryst. Liq. Cryst.51, 253-264], also in the space group P2(1), but with two unique mol-ecules in the asymmetric unit. As in the previously reported structures, rings A and C in the mol-ecule adopt chair conformations with half-chair conformations for rings B and D. The ring junctions B-C and C-D are trans, whereas the junction A-B is quasi-trans. In the crystal structure, mol-ecules are arranged in a head-to-tail fashion along a and are stacked along the b axis.

| S-EPMC2979588 | biostudies-literature

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data