metal-organic compounds
catena-Poly[diquinolinium [[diaquacobaltate(II)]-μ-cyclotetraphosphato] hexahydrate]
aLaboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna Bizerte, Tunisia, and bChemistry Departement, Faculty of Sciences, King Saud University, Riyadh, Saudi Arabia
*Correspondence e-mail: Hanene.Hemissi@fsb.rnu.tn
The cyclotetraphosphate anion, [P4O12]4−, forms the title complex with cobalt(II) and quinolinium, {(C9H8N)2[Co(P4O12)(H2O)2]·6H2O}n. In the complex anion, the CoII ion, lying on an inversion center, is surrounded by four phosphate O atoms and two water molecules in a slightly distorted octahedral geometry. The consists of anionic ribbons of formula {[Co(P4O12)(H2O)2]2−}n extending along [100]. A network of O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds consolidates the crystal packing.
Related literature
For the crystal chemistry of condensed phosphates, see: Durif (1995). For general background to transition metal–organic derivatives of polyoxoanions, see: Feher & Budzichowski (1995); Guerrero et al. (1999); Ikotun et al. (2008); Lugmair & Tilley (1998). For general background to hydrogen bonds, see: Blessing (1986); Brown (1976); Steiner & Saenger (1993). For the synthesis, see: Ondik (1964).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1989); cell CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536810002096/hy2272sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810002096/hy2272Isup2.hkl
The title compound was prepared by adding ethanolic solution (5 ml) of quinoline (8.34 mmol) dropwise to a mixture of H4P4O12 (4.15 mmol) and CoCl2 (4.15 mmol) in water (20 ml). Pink prism crystals of good quality were obtained after a slow evaporation during few days at ambient temperature. The cyclotetraphosphoric acid, H4P4O12, was produced from Na4P4O12.4H2O, prepared according to the Ondik process (Ondik, 1964) through an ion-exchange resin in H-state (Amberlite IR 120).
H atoms on C and N atoms were positioned geometrically and treated as riding on their parent atoms, with N—H = 0.86, C—H =0.93 Å and with Uiso(H) = 1.2Ueq(C,N). H atoms of water molecules were located from difference Fourier maps and refined isotropically. The highest residual electron density was found 0.73 Å from Co1 and the deepest hole 0.76 Å from Co1.
Transition metal–organic derivatives of polyoxoanions have recently been attracting considerable attention, because they serve as molecular models of metal species bound on oxo surfaces of heterogeneous catalysts (Feher & Budzichowski, 1995). In this context, several frameworks of this kind of materials with one-, two- or three-dimensional networks have been successfully constructed by using monophosphates, monophosphonates and monophosphinates (Guerrero et al., 1999; Lugmair & Tilley, 1998). In contrast, structural diversity of transition metal–organic derivatives of condensed phosphates has been much less explored. In order to enrich the varieties in such kinds of hybrid materials, we report the synthesis and
of (C9H8N)2[Co(P4O12)(H2O)2].6H2O.The title compound contains protonated quinolinium cations, diaquacyclotetraphosphatocobaltate(II) dianions and water molecules (Fig. 1). The cyclic phosphate anion, [P4O12]4-, is located around an inversion center and so is built up by only two independent PO4 tetrahedra. Its main geometrical features [the bond lengths P—O = 1.473 (2)–1.603 (2) Å, and the bond angles O—P—O = 100.24 (9)–121.11 (1)°, P—O—P = 134.40 (1)–137.25 (1)°] are not significantly different from what is commonly observed in other cyclotetraphosphate anions with the same internal symmetry (Durif, 1995). The
of the CoII atom, which lies on an inversion center, is octahedral with four external O atoms O(E) from two adjacent bidentate cyclotetraphosphates and two water O atoms O(w), providing a Co atom with six O donor set [four O(E) equatorial arrangement with two axial O(w)]. The Co—O bond lengths fall within the range of 2.106 (2)–2.116 (2) Å. The shortest distance between two neighboring Co atoms is 7.443 (3) Å. This distance could explain the cobalt magnetic properties in several materials (Ikotun et al., 2008). The [CoO4(H2O)2] octahedra alternate with the P4O12 rings as to form infinite ribbons, fused through Co—O—P linkage, propagating along the a axis (Fig. 2). The protonated quinolinim is located in the inter-ribbons spacing, and it neutralizes the negative charge of the anionic part. These organic entities are planar as evidenced by the mean deviation (±0.005 Å) from least square plane defined by the nine constituent atoms. As well as electrostatic and van der Waals interactions, the component species of the title compound establish a three-dimensional network through N—H···O and O—H···O hydrogen bonds. The structure is further stabilized with non-classical hydrogen bonds of the C—H···O type (Steiner & Saenger, 1993). The examination of the hydrogen-bond scheme shows that hydrogen bond connecting C9 to the phosphate group and water molecule is bifurcated. In the structure, there are two strong hydrogen bonds, with O···O distances of 2.666 (3) and 2.728 (3) Å. The others are weaker, with O(N, C)···O ranging from 2.743 (3) to 3.459 (4) Å (Blessing, 1986; Brown, 1976).For the crystal chemistry of condensed phosphates, see: Durif (1995). For general background to transition metal–organic derivatives of polyoxoanions, see: Feher & Budzichowski (1995); Guerrero et al. (1999); Ikotun et al. (2008); Lugmair & Tilley (1998). For general background to hydrogen bonds, see: Blessing (1986); Brown (1976); Steiner & Saenger (1993). For the synthesis, see: Ondik (1964).
Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1989); cell
CAD-4 EXPRESS (Enraf–Nonius, 1989); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. The structure of the title compound. Displacement ellipsoids are drawn at the 30% probability level. [Symmetry codes: (i) 1-x, 1-y, 1-z; (ii) 2-x, 1-y, 1-z.] | |
Fig. 2. Projection of the title compound along the b axis. |
(C9H8N)2[Co(P4O12)(H2O)2]·6H2O | Z = 1 |
Mr = 779.27 | F(000) = 401 |
Triclinic, P1 | Dx = 1.727 Mg m−3 |
Hall symbol: -P 1 | Ag Kα radiation, λ = 0.56083 Å |
a = 7.443 (3) Å | Cell parameters from 25 reflections |
b = 10.037 (4) Å | θ = 9.0–11.0° |
c = 10.682 (7) Å | µ = 0.46 mm−1 |
α = 83.74 (4)° | T = 293 K |
β = 70.98 (4)° | Prism, pink |
γ = 85.71 (3)° | 0.20 × 0.18 × 0.16 mm |
V = 749.4 (6) Å3 |
Enraf–Nonius TurboCAD-4 diffractometer | Rint = 0.039 |
Radiation source: fine-focus sealed tube | θmax = 28.0°, θmin = 2.2° |
Graphite monochromator | h = −12→12 |
non–profiled ω/2θ scans | k = −16→16 |
12878 measured reflections | l = −17→10 |
7242 independent reflections | 2 standard reflections every 120 min |
4531 reflections with I > 2σ(I) | intensity decay: 2% |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.164 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.98 | w = 1/[σ2(Fo2) + (0.097P)2] where P = (Fo2 + 2Fc2)/3 |
7242 reflections | (Δ/σ)max = 0.022 |
237 parameters | Δρmax = 1.11 e Å−3 |
13 restraints | Δρmin = −1.46 e Å−3 |
(C9H8N)2[Co(P4O12)(H2O)2]·6H2O | γ = 85.71 (3)° |
Mr = 779.27 | V = 749.4 (6) Å3 |
Triclinic, P1 | Z = 1 |
a = 7.443 (3) Å | Ag Kα radiation, λ = 0.56083 Å |
b = 10.037 (4) Å | µ = 0.46 mm−1 |
c = 10.682 (7) Å | T = 293 K |
α = 83.74 (4)° | 0.20 × 0.18 × 0.16 mm |
β = 70.98 (4)° |
Enraf–Nonius TurboCAD-4 diffractometer | Rint = 0.039 |
12878 measured reflections | 2 standard reflections every 120 min |
7242 independent reflections | intensity decay: 2% |
4531 reflections with I > 2σ(I) |
R[F2 > 2σ(F2)] = 0.057 | 13 restraints |
wR(F2) = 0.164 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.98 | Δρmax = 1.11 e Å−3 |
7242 reflections | Δρmin = −1.46 e Å−3 |
237 parameters |
x | y | z | Uiso*/Ueq | ||
Co1 | 0.5000 | 0.5000 | 0.5000 | 0.02117 (10) | |
P2 | 0.84035 (7) | 0.67186 (5) | 0.52866 (5) | 0.02037 (11) | |
P1 | 0.94639 (7) | 0.49127 (5) | 0.31420 (5) | 0.02082 (11) | |
O5 | 0.7442 (2) | 0.47075 (18) | 0.33361 (17) | 0.0290 (3) | |
O9 | 0.8351 (3) | 0.81917 (16) | 0.5033 (2) | 0.0353 (4) | |
O8 | 0.9759 (3) | 0.63833 (17) | 0.6180 (2) | 0.0329 (4) | |
O7 | 0.9688 (2) | 0.61035 (16) | 0.39418 (17) | 0.0284 (3) | |
O1 | 0.4503 (3) | 0.68127 (18) | 0.39353 (19) | 0.0348 (4) | |
O6 | 1.0732 (3) | 0.5182 (2) | 0.17668 (18) | 0.0410 (4) | |
C1 | 1.2832 (4) | 0.9562 (2) | −0.0159 (3) | 0.0314 (4) | |
N1 | 1.3663 (3) | 0.8353 (2) | −0.0577 (2) | 0.0350 (4) | |
H1 | 1.3836 | 0.7736 | 0.0002 | 0.042* | |
C2 | 1.2288 (5) | 0.9765 (3) | 0.1194 (3) | 0.0432 (6) | |
H2 | 1.2488 | 0.9092 | 0.1811 | 0.052* | |
C6 | 1.2539 (4) | 1.0555 (3) | −0.1110 (3) | 0.0370 (5) | |
C7 | 1.3093 (5) | 1.0269 (3) | −0.2441 (3) | 0.0447 (6) | |
H7 | 1.2879 | 1.0908 | −0.3082 | 0.054* | |
C3 | 1.1460 (6) | 1.0973 (4) | 0.1583 (4) | 0.0549 (8) | |
H3 | 1.1094 | 1.1128 | 0.2476 | 0.066* | |
C8 | 1.3942 (5) | 0.9057 (4) | −0.2799 (3) | 0.0495 (7) | |
H8 | 1.4340 | 0.8876 | −0.3686 | 0.059* | |
C9 | 1.4211 (4) | 0.8100 (3) | −0.1843 (3) | 0.0437 (6) | |
H9 | 1.4780 | 0.7269 | −0.2086 | 0.052* | |
C5 | 1.1660 (5) | 1.1797 (3) | −0.0655 (4) | 0.0512 (8) | |
H5 | 1.1433 | 1.2478 | −0.1255 | 0.061* | |
C4 | 1.1153 (6) | 1.1986 (3) | 0.0652 (4) | 0.0607 (10) | |
H4 | 1.0590 | 1.2805 | 0.0940 | 0.073* | |
O10 | 0.6636 (2) | 0.59823 (17) | 0.58700 (16) | 0.0282 (3) | |
O2 | 1.3962 (3) | 0.65569 (19) | 0.14615 (19) | 0.0358 (4) | |
O3 | 1.3081 (3) | 0.5195 (2) | −0.0816 (2) | 0.0412 (4) | |
O4 | 0.2153 (3) | 0.9054 (2) | 0.4559 (3) | 0.0549 (6) | |
H11 | 0.369 (4) | 0.735 (3) | 0.436 (3) | 0.044 (10)* | |
H21 | 0.436 (5) | 0.674 (4) | 0.320 (2) | 0.052 (11)* | |
H12 | 1.496 (3) | 0.610 (3) | 0.118 (4) | 0.052 (11)* | |
H22 | 1.299 (3) | 0.613 (3) | 0.163 (4) | 0.046 (10)* | |
H13 | 1.208 (4) | 0.513 (4) | −0.013 (2) | 0.052 (11)* | |
H23 | 1.264 (5) | 0.505 (4) | −0.145 (2) | 0.056 (11)* | |
H14 | 0.231 (5) | 0.990 (2) | 0.451 (4) | 0.056 (11)* | |
H24 | 0.098 (3) | 0.897 (3) | 0.465 (4) | 0.056 (11)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.01923 (17) | 0.02359 (18) | 0.02047 (18) | 0.00158 (13) | −0.00587 (13) | −0.00424 (13) |
P2 | 0.0235 (2) | 0.0164 (2) | 0.0224 (2) | 0.00486 (16) | −0.00927 (18) | −0.00462 (16) |
P1 | 0.0217 (2) | 0.0241 (2) | 0.0155 (2) | 0.00357 (17) | −0.00460 (16) | −0.00431 (17) |
O5 | 0.0228 (7) | 0.0389 (9) | 0.0272 (8) | 0.0059 (6) | −0.0095 (6) | −0.0111 (6) |
O9 | 0.0451 (10) | 0.0176 (7) | 0.0457 (11) | 0.0086 (6) | −0.0190 (8) | −0.0054 (7) |
O8 | 0.0385 (9) | 0.0262 (7) | 0.0439 (10) | 0.0039 (6) | −0.0270 (8) | −0.0061 (7) |
O7 | 0.0277 (7) | 0.0257 (7) | 0.0277 (8) | −0.0016 (6) | −0.0009 (6) | −0.0091 (6) |
O1 | 0.0473 (10) | 0.0289 (8) | 0.0294 (9) | 0.0092 (7) | −0.0153 (8) | −0.0057 (7) |
O6 | 0.0442 (10) | 0.0516 (11) | 0.0189 (7) | −0.0067 (9) | 0.0032 (7) | −0.0060 (7) |
C1 | 0.0319 (10) | 0.0283 (10) | 0.0328 (12) | 0.0007 (8) | −0.0094 (9) | −0.0019 (8) |
N1 | 0.0377 (11) | 0.0283 (9) | 0.0329 (11) | 0.0020 (8) | −0.0050 (8) | 0.0013 (8) |
C2 | 0.0487 (15) | 0.0478 (15) | 0.0337 (13) | 0.0005 (12) | −0.0135 (11) | −0.0072 (11) |
C6 | 0.0421 (13) | 0.0286 (11) | 0.0394 (13) | −0.0012 (9) | −0.0137 (11) | 0.0025 (9) |
C7 | 0.0512 (16) | 0.0462 (15) | 0.0356 (14) | −0.0076 (12) | −0.0154 (12) | 0.0092 (12) |
C3 | 0.064 (2) | 0.0542 (19) | 0.0495 (18) | −0.0019 (16) | −0.0158 (16) | −0.0233 (15) |
C8 | 0.0562 (18) | 0.0559 (18) | 0.0300 (13) | −0.0067 (14) | −0.0044 (12) | −0.0033 (12) |
C9 | 0.0460 (15) | 0.0368 (13) | 0.0383 (14) | 0.0024 (11) | 0.0004 (11) | −0.0071 (11) |
C5 | 0.0574 (19) | 0.0280 (12) | 0.069 (2) | 0.0018 (12) | −0.0237 (16) | −0.0006 (13) |
C4 | 0.062 (2) | 0.0364 (15) | 0.082 (3) | 0.0054 (14) | −0.0164 (19) | −0.0267 (17) |
O10 | 0.0251 (7) | 0.0347 (8) | 0.0249 (7) | −0.0022 (6) | −0.0056 (6) | −0.0095 (6) |
O2 | 0.0398 (10) | 0.0339 (9) | 0.0312 (9) | 0.0008 (7) | −0.0094 (8) | 0.0001 (7) |
O3 | 0.0451 (11) | 0.0543 (12) | 0.0253 (9) | 0.0030 (9) | −0.0129 (8) | −0.0072 (8) |
O4 | 0.0449 (12) | 0.0263 (9) | 0.091 (2) | 0.0085 (8) | −0.0178 (12) | −0.0164 (11) |
Co1—O10i | 2.1064 (16) | N1—H1 | 0.8600 |
Co1—O10 | 2.1064 (16) | C2—C3 | 1.361 (5) |
Co1—O1i | 2.1127 (18) | C2—H2 | 0.9300 |
Co1—O1 | 2.1127 (18) | C6—C7 | 1.402 (4) |
Co1—O5i | 2.1159 (16) | C6—C5 | 1.421 (4) |
Co1—O5 | 2.1159 (16) | C7—C8 | 1.362 (5) |
P2—O9 | 1.4737 (17) | C7—H7 | 0.9300 |
P2—O10 | 1.4748 (17) | C3—C4 | 1.403 (6) |
P2—O8 | 1.5963 (17) | C3—H3 | 0.9300 |
P2—O7 | 1.6029 (16) | C8—C9 | 1.377 (5) |
P1—O6 | 1.4730 (18) | C8—H8 | 0.9300 |
P1—O5 | 1.4779 (17) | C9—H9 | 0.9300 |
P1—O8ii | 1.5833 (18) | C5—C4 | 1.354 (6) |
P1—O7 | 1.5913 (17) | C5—H5 | 0.9300 |
O8—P1ii | 1.5833 (18) | C4—H4 | 0.9300 |
O1—H11 | 0.830 (17) | O2—H12 | 0.827 (17) |
O1—H21 | 0.831 (17) | O2—H22 | 0.825 (17) |
C1—N1 | 1.372 (3) | O3—H13 | 0.863 (17) |
C1—C6 | 1.401 (4) | O3—H23 | 0.875 (17) |
C1—C2 | 1.402 (4) | O4—H14 | 0.855 (18) |
N1—C9 | 1.326 (4) | O4—H24 | 0.855 (17) |
O10i—Co1—O10 | 180.00 (8) | N1—C1—C2 | 119.6 (2) |
O10i—Co1—O1i | 90.99 (7) | C6—C1—C2 | 122.1 (3) |
O10—Co1—O1i | 89.01 (7) | C9—N1—C1 | 122.4 (2) |
O10i—Co1—O1 | 89.01 (7) | C9—N1—H1 | 118.8 |
O10—Co1—O1 | 90.99 (7) | C1—N1—H1 | 118.8 |
O1i—Co1—O1 | 180.0 | C3—C2—C1 | 118.3 (3) |
O10i—Co1—O5i | 89.95 (6) | C3—C2—H2 | 120.8 |
O10—Co1—O5i | 90.05 (6) | C1—C2—H2 | 120.8 |
O1i—Co1—O5i | 86.22 (7) | C1—C6—C7 | 118.8 (3) |
O1—Co1—O5i | 93.78 (7) | C1—C6—C5 | 117.5 (3) |
O10i—Co1—O5 | 90.05 (6) | C7—C6—C5 | 123.7 (3) |
O10—Co1—O5 | 89.95 (6) | C8—C7—C6 | 120.1 (3) |
O1i—Co1—O5 | 93.78 (7) | C8—C7—H7 | 119.9 |
O1—Co1—O5 | 86.22 (7) | C6—C7—H7 | 119.9 |
O5i—Co1—O5 | 180.0 | C2—C3—C4 | 120.8 (3) |
O9—P2—O10 | 121.11 (11) | C2—C3—H3 | 119.6 |
O9—P2—O8 | 105.29 (10) | C4—C3—H3 | 119.6 |
O10—P2—O8 | 110.13 (10) | C7—C8—C9 | 119.8 (3) |
O9—P2—O7 | 108.09 (10) | C7—C8—H8 | 120.1 |
O10—P2—O7 | 109.91 (9) | C9—C8—H8 | 120.1 |
O8—P2—O7 | 100.23 (10) | N1—C9—C8 | 120.5 (3) |
O6—P1—O5 | 117.41 (11) | N1—C9—H9 | 119.7 |
O6—P1—O8ii | 109.43 (12) | C8—C9—H9 | 119.7 |
O5—P1—O8ii | 106.81 (10) | C4—C5—C6 | 119.9 (3) |
O6—P1—O7 | 106.60 (11) | C4—C5—H5 | 120.0 |
O5—P1—O7 | 111.38 (9) | C6—C5—H5 | 120.0 |
O8ii—P1—O7 | 104.47 (10) | C5—C4—C3 | 121.3 (3) |
P1—O5—Co1 | 130.02 (10) | C5—C4—H4 | 119.3 |
P1ii—O8—P2 | 137.26 (12) | C3—C4—H4 | 119.3 |
P1—O7—P2 | 134.40 (11) | P2—O10—Co1 | 131.90 (10) |
Co1—O1—H11 | 117 (2) | H12—O2—H22 | 113 (3) |
Co1—O1—H21 | 116 (3) | H13—O3—H23 | 102 (2) |
H11—O1—H21 | 110 (2) | H14—O4—H24 | 107 (3) |
N1—C1—C6 | 118.3 (2) |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+2, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2 | 0.86 | 1.88 | 2.728 (3) | 171 |
O1—H11···O4 | 0.83 (3) | 1.98 (3) | 2.747 (3) | 154 (3) |
O1—H21···O2iii | 0.84 (3) | 2.00 (3) | 2.841 (3) | 179 (4) |
O2—H12···O3iv | 0.83 (3) | 1.85 (3) | 2.666 (3) | 168 (3) |
O2—H22···O6 | 0.83 (3) | 1.95 (3) | 2.771 (3) | 172 (4) |
O3—H13···O6 | 0.86 (2) | 1.95 (2) | 2.743 (3) | 152 (3) |
O3—H23···O5v | 0.87 (3) | 2.02 (2) | 2.833 (3) | 154 (3) |
O4—H14···O9vi | 0.86 (2) | 2.01 (2) | 2.824 (3) | 157 (4) |
O4—H24···O9iii | 0.86 (3) | 2.06 (3) | 2.890 (3) | 163 (3) |
C7—H7···O9vii | 0.93 | 2.59 | 3.459 (4) | 156 |
C9—H9···O3 | 0.93 | 2.54 | 3.080 (4) | 118 |
C9—H9···O10viii | 0.93 | 2.59 | 3.381 (3) | 143 |
Symmetry codes: (iii) x−1, y, z; (iv) −x+3, −y+1, −z; (v) −x+2, −y+1, −z; (vi) −x+1, −y+2, −z+1; (vii) −x+2, −y+2, −z; (viii) x+1, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | (C9H8N)2[Co(P4O12)(H2O)2]·6H2O |
Mr | 779.27 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 7.443 (3), 10.037 (4), 10.682 (7) |
α, β, γ (°) | 83.74 (4), 70.98 (4), 85.71 (3) |
V (Å3) | 749.4 (6) |
Z | 1 |
Radiation type | Ag Kα, λ = 0.56083 Å |
µ (mm−1) | 0.46 |
Crystal size (mm) | 0.20 × 0.18 × 0.16 |
Data collection | |
Diffractometer | Enraf–Nonius TurboCAD-4 |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12878, 7242, 4531 |
Rint | 0.039 |
(sin θ/λ)max (Å−1) | 0.836 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.164, 0.98 |
No. of reflections | 7242 |
No. of parameters | 237 |
No. of restraints | 13 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 1.11, −1.46 |
Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1989), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2 | 0.8600 | 1.8800 | 2.728 (3) | 171.00 |
O1—H11···O4 | 0.83 (3) | 1.98 (3) | 2.747 (3) | 154 (3) |
O1—H21···O2i | 0.84 (3) | 2.00 (3) | 2.841 (3) | 179 (4) |
O2—H12···O3ii | 0.83 (3) | 1.85 (3) | 2.666 (3) | 168 (3) |
O2—H22···O6 | 0.83 (3) | 1.95 (3) | 2.771 (3) | 172 (4) |
O3—H13···O6 | 0.86 (2) | 1.95 (2) | 2.743 (3) | 152 (3) |
O3—H23···O5iii | 0.87 (3) | 2.02 (2) | 2.833 (3) | 154 (3) |
O4—H14···O9iv | 0.86 (2) | 2.01 (2) | 2.824 (3) | 157 (4) |
O4—H24···O9i | 0.86 (3) | 2.06 (3) | 2.890 (3) | 163 (3) |
C7—H7···O9v | 0.93 | 2.59 | 3.459 (4) | 156 |
C9—H9···O3 | 0.93 | 2.54 | 3.080 (4) | 118 |
C9—H9···O10vi | 0.93 | 2.59 | 3.381 (3) | 143 |
Symmetry codes: (i) x−1, y, z; (ii) −x+3, −y+1, −z; (iii) −x+2, −y+1, −z; (iv) −x+1, −y+2, −z+1; (v) −x+2, −y+2, −z; (vi) x+1, y, z−1. |
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Transition metal–organic derivatives of polyoxoanions have recently been attracting considerable attention, because they serve as molecular models of metal species bound on oxo surfaces of heterogeneous catalysts (Feher & Budzichowski, 1995). In this context, several frameworks of this kind of materials with one-, two- or three-dimensional networks have been successfully constructed by using monophosphates, monophosphonates and monophosphinates (Guerrero et al., 1999; Lugmair & Tilley, 1998). In contrast, structural diversity of transition metal–organic derivatives of condensed phosphates has been much less explored. In order to enrich the varieties in such kinds of hybrid materials, we report the synthesis and crystal structure of (C9H8N)2[Co(P4O12)(H2O)2].6H2O.
The title compound contains protonated quinolinium cations, diaquacyclotetraphosphatocobaltate(II) dianions and water molecules (Fig. 1). The cyclic phosphate anion, [P4O12]4-, is located around an inversion center and so is built up by only two independent PO4 tetrahedra. Its main geometrical features [the bond lengths P—O = 1.473 (2)–1.603 (2) Å, and the bond angles O—P—O = 100.24 (9)–121.11 (1)°, P—O—P = 134.40 (1)–137.25 (1)°] are not significantly different from what is commonly observed in other cyclotetraphosphate anions with the same internal symmetry (Durif, 1995). The coordination polyhedron of the CoII atom, which lies on an inversion center, is octahedral with four external O atoms O(E) from two adjacent bidentate cyclotetraphosphates and two water O atoms O(w), providing a Co atom with six O donor set [four O(E) equatorial arrangement with two axial O(w)]. The Co—O bond lengths fall within the range of 2.106 (2)–2.116 (2) Å. The shortest distance between two neighboring Co atoms is 7.443 (3) Å. This distance could explain the cobalt magnetic properties in several materials (Ikotun et al., 2008). The [CoO4(H2O)2] octahedra alternate with the P4O12 rings as to form infinite ribbons, fused through Co—O—P linkage, propagating along the a axis (Fig. 2). The protonated quinolinim is located in the inter-ribbons spacing, and it neutralizes the negative charge of the anionic part. These organic entities are planar as evidenced by the mean deviation (±0.005 Å) from least square plane defined by the nine constituent atoms. As well as electrostatic and van der Waals interactions, the component species of the title compound establish a three-dimensional network through N—H···O and O—H···O hydrogen bonds. The structure is further stabilized with non-classical hydrogen bonds of the C—H···O type (Steiner & Saenger, 1993). The examination of the hydrogen-bond scheme shows that hydrogen bond connecting C9 to the phosphate group and water molecule is bifurcated. In the structure, there are two strong hydrogen bonds, with O···O distances of 2.666 (3) and 2.728 (3) Å. The others are weaker, with O(N, C)···O ranging from 2.743 (3) to 3.459 (4) Å (Blessing, 1986; Brown, 1976).