Structure of potassium paradodecatungstate 71/2-hydrate

Evans, Howard T.; Kortz, Ulrich; Jameson, G. B.

doi:10.1107/s0108270192012010

Cited by 14 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The centrosymmetric (H 2 W 12 O 42 ) 10-ion is formed from 12 WO 6 octahedra, which can be divided into four groups, each containing three edge-sharing WO 6 (Table 1). These values are in accord with those reported in other paradodecatungstates [23][24][25][26], although the angle W side -W middle -W side in the open angular trimer is somewhat smaller than the reported value of 115.72° [27]. In the anionic chain in 1, the (H 2 W 12 O 42 ) 10-cluster is coordinated to four Cu(II) ions through the l-oxygen atoms of four side WO 6 octahedra.…”

Section: Crystal Data Collection and Refinementsupporting

confidence: 93%

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

Dutta

Maity

Ali

et al. 2007

Transition Met Chem

View full text Add to dashboard Cite

A novel bis(glycinato)copper(II)paradodecatungstate Na 8 [{Cu(gly) 2 } 2 ]-{H 2 (H 2 W 12 O 42 )}] Á 24H 2 O (1) has been synthesized under hydrothermal conditions. The crystal structure of 1 reveals an infinite one-dimensional chain along the [100] direction and is built from paradodecatungstate (H 2 W 12 O 42 ) 10-clusters joined through [Cu(gly) 2 ] moieties. Parallel chains are interlinked by NaO 6 octahedra to generate a two-dimensional network.

show abstract

Section: Crystal Data Collection and Refinementsupporting

confidence: 93%

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

Dutta

Maity

Ali

et al. 2007

Transition Met Chem

View full text Add to dashboard Cite

show abstract

“…The paradodecatungstate is very similar to those previously reported [41,42] It is well known that POMs tend to act as multidentate ligands to link secondary metals into high-dimensional structures through surface terminal or bridging oxygen atoms [18,21]. In the title compound, the [H 2 W 12 O 42 ] 10À cluster acts as a tetradentate ligand coordinating to four Cu 2+ cations through terminal oxygen atoms of WO 6 of the belt-type W 3 O 14 groups.…”

supporting

confidence: 55%

A new high-dimensional architecture constructed from paradodecatungstate and [Cu(2-Hpzc)]2+ complexes

Chen

Peng

Pang

et al. 2009

Inorganic Chemistry Communications

View full text Add to dashboard Cite

“…However, the crystal structures of the different (hydrate) phases of AMT have never been fully determinedthere are also no crystal structures of any hydrous or anhydrous form of AMT reported or deposited in the ICSD (Inorganic Crystal Structure Database) . This is in contrast to APT, for which at least five different hydrate phases have been structurally determined or the composition has been reported: (NH 4 ) 10 [H 2 W 12 O 42 ](H 2 O) 4 , , (NH 4 ) 10 [H 2 W 12 O 42 ](H 2 O) 10 , , (NH 4 ) 10 [H 2 W 12 O 42 ](H 2 O) 9 , (NH 4 ) 6 [H 2 W 12 O 42 ](H 2 O) 10 , , and (NH 4 ) 10 [H 2 W 12 O 42 ](H 2 O) 6 …”

Section: Introductionmentioning

confidence: 99%

Ammonium Metatungstate, (NH₄)₆[H₂W₁₂O₄₀]: Crystallization and Thermal Behavior of Various Hydrous Species

Eder

Weil

Schubert

et al. 2021

Crystal Growth & Design

View full text Add to dashboard Cite

Various hydrous ammonium metatungstate phases (NH4)6[H2W12O40]·XH2O (AMT-X) have been obtained in the form of single crystals, using supersaturated solutions, antisolvent crystallization, and partial dehydration as strategies for crystal growth. On the basis of laboratory X-ray diffraction data, the crystal structures of the hydrous phases with X = 22, 12.5, 9.5, 8.5, 6, 4, and 2 as well of the cocrystals with X = 12-ethanol and X = 4-2acetone have been determined for the first time. AMT-22 forms the solid solution series (NH4)6–x K x [H2W12O40]·22H2O with the potassium salt (PMT-22) without a miscibility gap. Its tetragonal crystal structure shows a distorted cubic close-packed arrangement of the spherical α-Keggin-type [H2W12O40]6– anions with disordered ammonium N and water O atoms in the voids. The crystal structures of the other, less-hydrated AMT phases can be derived from distorted hexagonal rod packings of the α-Keggin anions, likewise with the cations and crystal water molecules in the voids. The thermal behavior of AMT-22 crystals reveals a quick dehydration, with AMT-9.5 as an intermediate and AMT-4 as a stable hydrate phase under ambient conditions. Upon further heating, the material decomposes with stepwise formation of AMT-2, AMT-1, AMT-0, and an amorphous phase, before orthorhombic WO3 forms above 400 °C. One of the commercially available AMT phases, “(NH4)6[H2W12O40]·XH2O” (with X = unspecified) has a water content of X = 4 but crystallizes in a structure other than AMT-4. Consequently, the 4-hydrate shows polymorphic behavior.

show abstract

Structure of potassium paradodecatungstate 71/2-hydrate

Cited by 14 publications

References 1 publication

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

A new high-dimensional architecture constructed from paradodecatungstate and [Cu(2-Hpzc)]2+ complexes

Ammonium Metatungstate, (NH₄)₆[H₂W₁₂O₄₀]: Crystallization and Thermal Behavior of Various Hydrous Species

Contact Info

Product

Resources

About

Structure of potassium paradodecatungstate 71/2-hydrate

Cited by 14 publications

References 1 publication

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

A novel cation induced polymeric chain in Na8[{Cu(gly)2}2]{H2(H2W12O42)}] · 24H2O: hydrothermal synthesis, spectroscopic characterization and X-ray structure analysis

A new high-dimensional architecture constructed from paradodecatungstate and [Cu(2-Hpzc)]2+ complexes

Ammonium Metatungstate, (NH4)6[H2W12O40]: Crystallization and Thermal Behavior of Various Hydrous Species

Contact Info

Product

Resources

About

Ammonium Metatungstate, (NH₄)₆[H₂W₁₂O₄₀]: Crystallization and Thermal Behavior of Various Hydrous Species