Bis[tris(phenanthroline-κ²N,N′)cobalt(II)] undecatungsto(VI)vanado(V)phosphate dihydrate

Abstract

In the title hydrated salt, [Co(C12H8N2)3]2[PVW11O40]·2H2O, the complete Kegggin ion is generated by crystallographic inversion symmetry, which imposes statistical disorder on the O atoms of its central PO4 group. The V atom is statistically disordered over all the metal sites of the anion. In the cation, the Co2+ ion is coordinated by three bidentate 1,10-phenanthroline (phen) ligands, generating a distorted CoN6 octa­hedron. Possible very weak intra­molecular C—H⋯π inter­actions occur in the cation. In the crystal, the components are linked by O—H⋯O and C—H⋯O inter­actions, building a three-dimensional network featuring one-dimensional voids along the c-axis direction.

Hydrothermal Synthesis, Characterization and Photoluminescent Properties of a New Vanadium Substituted Keggin Assembly Supported by Ni Complex

“…The X-O-X bond angles are in the range from 91.1 (9)° to 142.2 (14)° (Table 3). These geometrical features are comparable to those observed in related structure of substituted keggin type clusters [23][24][25]33]. The Ni 2+ ion metal is also coordinated by six nitrogen atoms from three chelating 1,10-phenanthroline ligands to form a rather regular MN6 octahedron with bond lenghts around Ni are 2.11 (2) -2.16 (2) Å (Ni-N), 77.3 (7) -172.8 (8) ° (N-Ni-N) ( Table 3).…”

“…The distortion index [34] of Ni 2+ octahedron is 0.023. By comparison with the Co-complex in [Co(phen)3]2[PVW11O40].2H2O [25], we can observe that the distortion decreases to 0.015 for Co 2+ octahedron which may be in relation with the ionic radius of metal cations. N4-Ni1-N3 78.9 (8) N6-Ni1-N3 172.8 (8) N1-Ni1-N3 98.7 (7) N5-Ni1-N3 93.7 (9) N4-Ni1-N2 90.5 (7) N6-Ni1-N2 93.5 (8) N1-Ni1-N2 77.3 (7) N5-Ni1-N2 170.9 (7) N3-Ni1-N2 93.3 (8) [11 0] crystallographic directions respectively at z = 0 and z = ½ (Figure 4b).…”

“…As a result, each X site in the polyanion structure was assigned as 11/12W and 1/12 V while the V was constrained in the final refinement. This statistically disorder is very common for this kind of heteropolyoxotungstate as regarded in bibliography [23][24][25]. Commonly, the X-O bond distances are grouped into three sets: X-Ot, X-Ob and X-Oc (with Ot: terminal oxygen atoms of type X-Ot, Ob: bridging oxygen atoms of type X-Ob-X and Oc: central oxygen atoms of type X-Oc-P) which are respectively ranged between 1.648 (15)-1.693 (17), 1.83 (2)-2.08 (3)Å and 2.37 (2) -2.51 (2)Å as shown in Table 3.…”

“…In the course of these investigations and by varying the metal chelating agent, we succeeds to prepare new two Keggin-type tungstovanado phosphate cluster decorated by metal-organic mononuclear complex. The first with Co ion was recently published [Co(phen)3]2[PVW11O40].2H2O [25] and the second with Ni metal; [Ni(phen)3]2[PVW11O40].4H2O is the subject of this paper. Its preparation and its structure and physicochemical characterization are discussed.…”