La structure cristalline du tétramétaphosphate de cuivre, Cu2P4O12

Laügt, M.; Guitel, J. C.; Tordjman, I.; Bassi, G.

doi:10.1107/s0567740872002079

Cited by 31 publications

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“…Illustration of the structure type have been given earlier (cf. Laügt et al, 1974;Nord and Lindberg, 1975;Nord, 1986). The tetrametaphosphate anion is shown in Fig.…”

Section: Structure Analysismentioning

confidence: 95%

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The crystal structure of iron(II) tetrametaphosphate, Fe₂P₄O₁₂

Nord¹,

Ericsson²,

Werner³

1990

Zeitschrift Für Kristallographie - Crystalline Materials

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Iron(II) tetrametaphosphate / Crystal structure / Rietveld techniqueAbstract. The preparation of Fe 2 P40 12 is described. The monoclinic (C2/ c) unit cell has the dimensions a = 11.942(2), b = 8.370(2), c = 9.936(2) A, Β -118.77(1)°, V =• 870.6(4) A 3 (Z = 4); Λ/ = 427.58 a.u., D X = 3.262g • cm -3 . The compound belongs to a family of isostructural Λ/ 2 Ρ 4 0 12 tetrametaphosphates, and its structure has been refined with the Rietveld full-profile technique utilizing neutron powder diffraction data down to R F -0.046 on the basis of 462 independent reflections (R P = 0.049, R WP = 0.066). The structure is built of two distinct types of Fe0 6 octahedra, both with an average Fe-Ο distance of 2.13(1) A, and ring-shaped P 4 Of 2 anions. A comparison with other known M2P4O12 structures is made, showing good correlation between metal-oxygen distances, Af 2+ cation radii and unit cell dimensions.

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“…Illustration of the structure type have been given earlier (cf. Laügt et al, 1974;Nord and Lindberg, 1975;Nord, 1986). The tetrametaphosphate anion is shown in Fig.…”

Section: Structure Analysismentioning

confidence: 95%

“…The crystal structure of this group was determined independently by studies of Cu 2 P 4 0 12 (Laügt et al, 1974) and Mg 2 P 4 0 12 (Nord and Lindberg, 1975). Somewhat later, Fe 2 P 4 0 12 was also added to the group by Bagieu-Beucher et al (1976), who published X-ray powder diffraction data and unit-cell dimensions for this compound.…”

Section: Introductionmentioning

confidence: 98%

The crystal structure of iron(II) tetrametaphosphate, Fe₂P₄O₁₂

Nord¹,

Ericsson²,

Werner³

1990

Zeitschrift Für Kristallographie - Crystalline Materials

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“…One strategy is based on acidification of MCl 2 (M = Co, Fe, Mn, Ni, Cu) by [H 2 PO 4 ] − , followed by thermal treatment at high temperatures (≥600°C), leading to binary oligomeric systems of the general formula M 2 P 4 O 12 . [2][3][4][10][11][12][13][14][15][16][17][18][19] A second strategy developed by Kamimura et al comprises stirring a solution containing a salt of the cyclo-tetrametaphosphate ligand with the desired noble transition metal (such as rhodium, iridium, ruthenium, and palladium) at room temperature overnight. The desired product can then be obtained by further extraction and crystallization from dichloromethane and diethyl ether.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of mononuclear early transition-metal complexes of κ³cyclo-tetrametaphosphate ([P₄O₁₂]⁴⁻) and cyclo-trimetaphosphate ([P₃O₉]³⁻)

et al. 2014

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We herein report the preparation of several mononuclear-metaphosphate complexes using simple techniques and mild conditions with yields ranging from 56% to 78%. Treatment of cyclo-tetrametaphosphate ([TBA]4[P4O12]·5H2O, TBA = tetra-n-butylammonium) with various metal sources including (CH3CN)3Mo(CO)3, (CH3CN)2Mo(CO)2(η(3)-C3H5)Cl, MoO2Cl2(OSMe2)2, and VOF3, leads to the clean and rapid formation of [TBA]4[(P4O12)Mo(CO)3]·2H2O, [TBA]3[(P4O12)Mo(CO)2(η(3)-C3H5)], [TBA]3[(P4O12)MoO2Cl] and [TBA]3[(P4O12)VOF2]·Et2O salts in isolated yields of 69, 56, 68, and 56% respectively. NMR spectroscopy, NMR simulations and single crystal X-ray studies reveal that the [P4O12](4-) anion behaves as a tridentate ligand wherein one of the metaphosphate groups is not directly bound to the metal. cyclo-Trimetaphosphate-metal complexes were prepared using a similar procedure i.e., treatment of [PPN]3[P3O9]·H2O (PPN = bis(triphenylphosphine)iminium) with the metal sources (CH3CN)2Mo(CO)2(η(3)-C3H5)Cl, MoO2Cl2(OSMe2)2, MoOCl3, VOF3, WOCl4, and WO2Cl2(CH3CN)2 to produce the corresponding salts, [PPN]2[(P3O9)Mo(CO)2(η(3)-C3H5)], [PPN]2[(P3O9)MoO2Cl], [PPN]2[(P3O9)MoOCl2], [PPN]2[(P3O9)VOF2]·2CH2Cl2, and [PPN]2[(P3O9)WO2Cl] in isolated yields of 78, 56, 75, 59, and 77% respectively. NMR spectroscopy, NMR simulations and single-crystal X-ray studies indicate that the trianionic ligand [P3O9](3-) in these complexes also has κ(3) connectivity.

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“…Crystalographically, ZrP 2 O 7 and CuP 2 O 6 phosphates are very different [35,36] and, besides the distinctions in crystal symmetry, the degree of condensation of phosphate groups in these compounds is not the same as well. In pyrophosphate of Zr(IV), PO 4 tetrahedra are linked in couples via P O P connection forming P 2 O 7 groups, while polyphosphate of Cu(II) represents a cyclic tetraphosphate where four PO 4 groups are linked in a ring forming P 4 O 12 groups.…”

Section: Resultsmentioning

confidence: 93%