inorganic compounds
Strontium disodium hexathiodiphosphate(IV) octahydrate
aInstitute of Inorganic and Analytical Chemistry, Clausthal University of Technology, Paul-Ernst-Strasse 4, 38678 Clausthal-Zellerfeld, Germany
*Correspondence e-mail: mimoza.gjikaj@tu-clausthal.de
The 2(P2S6)·8H2O is isotypic with that of its calcium analogue. The consists of one Sr2+ cation (2 symmetry), two Na+ cations (2 and symmetry, respectively), one-half of a centrosymmetric (P2S6)4− anion with a staggered confirmation and four water molecules. The is built up from layers of cations and anions extending parallel to (101). Each SrO8 polyhedron is connected via edge-sharing to two NaO4S2 octahedra and to one NaO2S4 octahedron. The NaO4S2 octaedra are, in turn, connected with two (P2S6)4− anions through common corners. Adjacent layers are held together by several O—H⋯S hydrogen-bonding interactions.
of SrNaRelated literature
For background to thiodiphosphates(IV), including their crystal structures, see: Jörgens et al. (2003); Klingen et al. (1973). For the synthesis of Na4(P2S6)·6H2O, see: Fincher et al. (1998). For the isotypic structure of CaNa2(P2S6)·8H2O, see: Ehrhardt &Gjikaj (2010).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: X-AREA (Stoe & Cie, 2008); cell X-AREA; data reduction: X-AREA; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2004); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810025316/wm2365sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810025316/wm2365Isup2.hkl
Na4(P2S6).6H2O has been prepared according to Fincher et al. (1998). The title compound was obtained by adding a molar equivalent of strontium hydroxide to a solution of Na4(P2S6).6H2O in 70 ml distilled water at 348 K. Slow cooling to room temperature yielded colorless crystals of the title compound within some days.
Hydrogen atoms were found from the difference Fourier map and were refined independently from their respective oxygen atoms with individual isotropic displacement parameters.
Alkaline earth hypothiodiphosphates were first reported by Klingen et al. (1973). The structure of the title compound, SrNa2(P2S6).8H2O, is isotypic with that of its calcium analogue, CaNa2(P2S6).8H2O (Ehrhardt & Gjikaj, 2010). The
of SrNa2(P2S6).8H2O contains one Sr2+ cation, two Na+ cations, one half of a (P2S6)4- anion and four water molecules (Fig. 1)Na(1) is octahedrally coordinated by four H2O molecules and two sulfur atoms of two (P2S6)4- anions (Fig. 2). Na(2) is also octahedrally coordinated by two H2O molecules and four sulfur atoms of two (P2S6)4- anions (Fig. 3). The strontium cation is eightfold coordinated by water O atoms with Sr—O distances from 2.573 (2) to 2.6459 (19) Å. The SrO8
can be described as a bicapped trigonal prism.The
is built up from layers of cations and anions extending parallel to (101). Within the layer each SrO8 polyhedron is connected by edge-sharing to two Na(1)O4S2 octahedra and to one Na(2)O2S4 octaedron. Furthermore, the Na(1)O4S2 octaedra are connected through common corners with two (P2S6)4- anions.The discrete ethane-like (P2S6)4- anion has a
and is located on a centre of inversion associated with the midpoint of the P—P bond. The corresponding P—P distance is 2.2405 (12) Å; the P—S distances range from 2.0162 (9) to 2.0248 (9) Å. These values agree well with those reported previously for other hypothiodiphosphate structures (Jörgens et al., 2003).Neighbouring layers are held together by various O—H···S hydrogen bonding interactions. The donor—acceptor distances between O atoms of water molecules and S atoms of (P2S6)4- units range from 3.169 to 3.334 Å (Table 2).
With the exception of the M-O bond lengths (M = Ca, Sr), all other bond lengths and angles as well as the O—H···S hydrogen bonding scheme are very similar in the two isotypic MNa2(P2S6).8H2O structures.
For background to thiodiphosphates(IV), including their crystal structures, see: Jörgens et al. (2003); Klingen et al. (1973). For the synthesis of Na4(P2S6).6H2O, see: Fincher et al. (1998). For the isotypic structure of CaNa2(P2S6).8H2O, see: Ehrhardt & Gjikaj (2010).
Data collection: X-AREA (Stoe & Cie, 2008); cell
X-AREA (Stoe & Cie, 2008); data reduction: X-AREA (Stoe & Cie, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2004); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The crystal structure of CaNa2(P2S6).8H2O in a projection along [010]. | |
Fig. 2. Coordination of Na1 with the atom labelling scheme. The displacement ellipsoids are drawn at the 50% probability level. Symmetry codes as in Table 1. H atoms are represented as spheres of arbirtary radius. | |
Fig. 3. View of the edge-shared CaO8 and Na(2)O2S4 polyhedra with the atom labelling scheme. The displacement ellipsoids are drawn at the 50% probability level. Symmetry codes as in Table 1. H atoms are represented as spheres of arbirtary radius. |
SrNa2(P2S6)·8H2O | F(000) = 1064 |
Mr = 532.03 | Dx = 1.983 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 14971 reflections |
a = 14.9010 (19) Å | θ = 1.0–29.8° |
b = 9.3282 (7) Å | µ = 3.98 mm−1 |
c = 14.1338 (19) Å | T = 223 K |
β = 114.918 (10)° | Block, colorless |
V = 1781.7 (4) Å3 | 0.28 × 0.26 × 0.25 mm |
Z = 4 |
Stoe IPDS 2 diffractometer | 2302 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.064 |
Graphite monochromator | θmax = 29.8°, θmin = 2.7° |
ω–scans | h = −20→20 |
14472 measured reflections | k = −13→11 |
2544 independent reflections | l = −19→17 |
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)] = 0.036 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.087 | All H-atom parameters refined |
S = 1.12 | w = 1/[σ2(Fo2) + (0.0378P)2 + 5.0597P] where P = (Fo2 + 2Fc2)/3 |
2544 reflections | (Δ/σ)max < 0.001 |
121 parameters | Δρmax = 1.14 e Å−3 |
0 restraints | Δρmin = −0.89 e Å−3 |
SrNa2(P2S6)·8H2O | V = 1781.7 (4) Å3 |
Mr = 532.03 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 14.9010 (19) Å | µ = 3.98 mm−1 |
b = 9.3282 (7) Å | T = 223 K |
c = 14.1338 (19) Å | 0.28 × 0.26 × 0.25 mm |
β = 114.918 (10)° |
Stoe IPDS 2 diffractometer | 2302 reflections with I > 2σ(I) |
14472 measured reflections | Rint = 0.064 |
2544 independent reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.087 | All H-atom parameters refined |
S = 1.12 | Δρmax = 1.14 e Å−3 |
2544 reflections | Δρmin = −0.89 e Å−3 |
121 parameters |
x | y | z | Uiso*/Ueq | ||
Sr | 0.5000 | 0.24637 (4) | 0.2500 | 0.01746 (10) | |
Na1 | 0.2500 | 0.2500 | 0.0000 | 0.0260 (3) | |
Na2 | 0.5000 | 0.6875 (3) | 0.2500 | 0.0440 (5) | |
P | 0.20406 (5) | 0.76351 (7) | 0.04496 (5) | 0.01570 (13) | |
S1 | 0.07286 (5) | 0.67170 (8) | −0.04401 (6) | 0.02445 (15) | |
S2 | 0.18992 (5) | 0.97603 (7) | 0.06433 (5) | 0.01959 (14) | |
S3 | 0.28146 (5) | 0.66742 (8) | 0.18434 (5) | 0.02452 (15) | |
O1 | 0.59794 (17) | 0.0300 (3) | 0.2305 (2) | 0.0318 (5) | |
O2 | 0.50855 (17) | 0.4687 (2) | 0.14363 (17) | 0.0259 (4) | |
O3 | 0.41245 (15) | 0.1665 (2) | 0.05340 (16) | 0.0238 (4) | |
O4 | 0.31300 (14) | 0.3293 (2) | 0.17560 (15) | 0.0220 (4) | |
H1A | 0.627 (5) | 0.042 (7) | 0.197 (5) | 0.08 (2)* | |
H1B | 0.638 (4) | 0.000 (6) | 0.292 (5) | 0.065 (17)* | |
H2A | 0.555 (5) | 0.473 (6) | 0.127 (5) | 0.070 (17)* | |
H2B | 0.461 (4) | 0.486 (5) | 0.093 (4) | 0.046 (13)* | |
H3A | 0.404 (4) | 0.086 (7) | 0.048 (5) | 0.067 (17)* | |
H3B | 0.450 (5) | 0.195 (8) | 0.023 (5) | 0.09 (2)* | |
H4A | 0.282 (3) | 0.283 (5) | 0.214 (4) | 0.037 (11)* | |
H4B | 0.302 (4) | 0.425 (7) | 0.170 (4) | 0.059 (15)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Sr | 0.01698 (15) | 0.01714 (16) | 0.01694 (15) | 0.000 | 0.00585 (11) | 0.000 |
Na1 | 0.0230 (7) | 0.0303 (9) | 0.0221 (7) | 0.0003 (6) | 0.0068 (6) | −0.0014 (6) |
Na2 | 0.0384 (10) | 0.0598 (15) | 0.0284 (9) | 0.000 | 0.0086 (8) | 0.000 |
P | 0.0192 (3) | 0.0137 (3) | 0.0171 (3) | −0.0002 (2) | 0.0104 (2) | −0.0003 (2) |
S1 | 0.0209 (3) | 0.0200 (3) | 0.0336 (3) | −0.0042 (2) | 0.0127 (3) | −0.0043 (3) |
S2 | 0.0232 (3) | 0.0145 (3) | 0.0219 (3) | 0.0012 (2) | 0.0103 (2) | −0.0008 (2) |
S3 | 0.0343 (3) | 0.0226 (3) | 0.0197 (3) | 0.0094 (3) | 0.0144 (3) | 0.0058 (2) |
O1 | 0.0232 (10) | 0.0306 (12) | 0.0366 (12) | 0.0049 (8) | 0.0076 (9) | −0.0042 (10) |
O2 | 0.0237 (9) | 0.0299 (11) | 0.0224 (9) | 0.0016 (8) | 0.0081 (8) | 0.0062 (8) |
O3 | 0.0277 (10) | 0.0218 (10) | 0.0236 (9) | −0.0005 (8) | 0.0126 (8) | −0.0037 (8) |
O4 | 0.0242 (9) | 0.0205 (9) | 0.0229 (9) | 0.0013 (7) | 0.0115 (7) | 0.0007 (8) |
Sr—O1 | 2.573 (2) | Na1—S2iv | 2.9741 (7) |
Sr—O1i | 2.573 (2) | Na2—O2 | 2.570 (3) |
Sr—O2i | 2.596 (2) | Na2—O2i | 2.570 (3) |
Sr—O2 | 2.596 (2) | Na2—S1iv | 2.9525 (15) |
Sr—O3 | 2.631 (2) | Na2—S1v | 2.9525 (15) |
Sr—O3i | 2.631 (2) | Na2—S3 | 2.9924 (9) |
Sr—O4 | 2.6459 (19) | Na2—S3i | 2.9925 (9) |
Sr—O4i | 2.6459 (19) | P—S1 | 2.0162 (9) |
Na1—O3ii | 2.344 (2) | P—S2 | 2.0243 (9) |
Na1—O3 | 2.345 (2) | P—S3 | 2.0248 (9) |
Na1—O4 | 2.372 (2) | P—Piv | 2.2405 (12) |
Na1—O4ii | 2.372 (2) | S1—Na2iv | 2.9525 (15) |
Na1—S2iii | 2.9741 (7) | S2—Na1vi | 2.9741 (7) |
O1—Sr—O1i | 76.65 (12) | O3—Na1—S2iii | 91.09 (6) |
O1—Sr—O2i | 149.01 (7) | O4—Na1—S2iii | 89.18 (5) |
O1i—Sr—O2i | 113.34 (9) | O4ii—Na1—S2iii | 90.82 (5) |
O1—Sr—O2 | 113.34 (9) | O3ii—Na1—S2iv | 91.09 (6) |
O1i—Sr—O2 | 149.01 (7) | O3—Na1—S2iv | 88.91 (6) |
O2i—Sr—O2 | 73.96 (10) | O4—Na1—S2iv | 90.82 (5) |
O1—Sr—O3 | 73.49 (8) | O4ii—Na1—S2iv | 89.18 (5) |
O1i—Sr—O3 | 80.77 (8) | S2iii—Na1—S2iv | 180.0 |
O2i—Sr—O3 | 135.60 (7) | O2—Na2—O2i | 74.82 (12) |
O2—Sr—O3 | 74.82 (7) | O2—Na2—S1iv | 82.23 (5) |
O1—Sr—O3i | 80.78 (8) | O2i—Na2—S1iv | 147.35 (8) |
O1i—Sr—O3i | 73.50 (8) | O2—Na2—S1v | 147.35 (8) |
O2i—Sr—O3i | 74.82 (7) | O2i—Na2—S1v | 82.23 (5) |
O2—Sr—O3i | 135.59 (7) | S1iv—Na2—S1v | 127.17 (10) |
O3—Sr—O3i | 147.09 (10) | O2—Na2—S3 | 94.85 (7) |
O1—Sr—O4 | 137.47 (7) | O2i—Na2—S3 | 79.40 (6) |
O1i—Sr—O4 | 73.86 (7) | S1iv—Na2—S3 | 79.75 (3) |
O2i—Sr—O4 | 72.30 (7) | S1v—Na2—S3 | 103.51 (3) |
O2—Sr—O4 | 80.60 (7) | O2—Na2—S3i | 79.40 (6) |
O3—Sr—O4 | 72.10 (6) | O2i—Na2—S3i | 94.85 (7) |
O3i—Sr—O4 | 118.24 (6) | S1iv—Na2—S3i | 103.51 (3) |
O1—Sr—O4i | 73.86 (7) | S1v—Na2—S3i | 79.75 (3) |
O1i—Sr—O4i | 137.47 (7) | S3—Na2—S3i | 172.83 (11) |
O2i—Sr—O4i | 80.60 (7) | S1—P—S2 | 111.81 (4) |
O2—Sr—O4i | 72.30 (7) | S1—P—S3 | 115.08 (4) |
O3—Sr—O4i | 118.23 (6) | S2—P—S3 | 110.55 (4) |
O3i—Sr—O4i | 72.10 (6) | S1—P—Piv | 105.20 (5) |
O4—Sr—O4i | 145.98 (9) | S2—P—Piv | 108.07 (5) |
O3ii—Na1—O3 | 180.0 | S3—P—Piv | 105.57 (5) |
O3ii—Na1—O4 | 97.64 (7) | P—S1—Na2iv | 106.45 (5) |
O3—Na1—O4 | 82.36 (7) | P—S2—Na1vi | 137.58 (3) |
O3ii—Na1—O4ii | 82.36 (7) | P—S3—Na2 | 111.92 (4) |
O3—Na1—O4ii | 97.64 (7) | Na2—O2—Sr | 105.61 (9) |
O4—Na1—O4ii | 180.0 | Na1—O3—Sr | 103.36 (8) |
O3ii—Na1—S2iii | 88.91 (6) | Na1—O4—Sr | 102.17 (7) |
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) −x+1/2, −y+1/2, −z; (iii) x, y−1, z; (iv) −x+1/2, −y+3/2, −z; (v) x+1/2, −y+3/2, z+1/2; (vi) x, y+1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···S3vii | 0.76 (7) | 2.66 (6) | 3.324 (3) | 146 (6) |
O1—H1B···S2viii | 0.86 (6) | 2.53 (6) | 3.306 (3) | 151 (5) |
O2—H2A···S2vii | 0.82 (6) | 2.51 (6) | 3.334 (2) | 176 (6) |
O2—H2B···S2iv | 0.79 (5) | 2.43 (5) | 3.214 (2) | 176 (5) |
O3—H3A···S1ii | 0.76 (7) | 2.44 (7) | 3.169 (2) | 163 (5) |
O3—H3B···S1vii | 0.88 (7) | 2.40 (7) | 3.222 (2) | 157 (6) |
O4—H4A···S3ix | 0.95 (5) | 2.29 (5) | 3.245 (2) | 175 (4) |
O4—H4B···S3 | 0.91 (6) | 2.30 (6) | 3.199 (2) | 171 (5) |
Symmetry codes: (ii) −x+1/2, −y+1/2, −z; (iv) −x+1/2, −y+3/2, −z; (vii) x+1/2, y−1/2, z; (viii) −x+1, y−1, −z+1/2; (ix) −x+1/2, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | SrNa2(P2S6)·8H2O |
Mr | 532.03 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 223 |
a, b, c (Å) | 14.9010 (19), 9.3282 (7), 14.1338 (19) |
β (°) | 114.918 (10) |
V (Å3) | 1781.7 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.98 |
Crystal size (mm) | 0.28 × 0.26 × 0.25 |
Data collection | |
Diffractometer | Stoe IPDS 2 |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14472, 2544, 2302 |
Rint | 0.064 |
(sin θ/λ)max (Å−1) | 0.700 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.087, 1.12 |
No. of reflections | 2544 |
No. of parameters | 121 |
H-atom treatment | All H-atom parameters refined |
Δρmax, Δρmin (e Å−3) | 1.14, −0.89 |
Computer programs: X-AREA (Stoe & Cie, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 2004).
Sr—O1 | 2.573 (2) | Na2—O2 | 2.570 (3) |
Sr—O2 | 2.596 (2) | Na2—S1i | 2.9525 (15) |
Sr—O3 | 2.631 (2) | Na2—S3 | 2.9924 (9) |
Sr—O4 | 2.6459 (19) | P—S1 | 2.0162 (9) |
Na1—O3 | 2.345 (2) | P—S2 | 2.0243 (9) |
Na1—O4 | 2.372 (2) | P—S3 | 2.0248 (9) |
Na1—S2i | 2.9741 (7) | P—Pi | 2.2405 (12) |
Symmetry code: (i) −x+1/2, −y+3/2, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···S3ii | 0.76 (7) | 2.66 (6) | 3.324 (3) | 146 (6) |
O1—H1B···S2iii | 0.86 (6) | 2.53 (6) | 3.306 (3) | 151 (5) |
O2—H2A···S2ii | 0.82 (6) | 2.51 (6) | 3.334 (2) | 176 (6) |
O2—H2B···S2i | 0.79 (5) | 2.43 (5) | 3.214 (2) | 176 (5) |
O3—H3A···S1iv | 0.76 (7) | 2.44 (7) | 3.169 (2) | 163 (5) |
O3—H3B···S1ii | 0.88 (7) | 2.40 (7) | 3.222 (2) | 157 (6) |
O4—H4A···S3v | 0.95 (5) | 2.29 (5) | 3.245 (2) | 175 (4) |
O4—H4B···S3 | 0.91 (6) | 2.30 (6) | 3.199 (2) | 171 (5) |
Symmetry codes: (i) −x+1/2, −y+3/2, −z; (ii) x+1/2, y−1/2, z; (iii) −x+1, y−1, −z+1/2; (iv) −x+1/2, −y+1/2, −z; (v) −x+1/2, y−1/2, −z+1/2. |
References
Brandenburg, K. (2004). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Ehrhardt, C. & Gjikaj, M. (2010). Acta Cryst. E66, i54. Web of Science CrossRef IUCr Journals Google Scholar
Fincher, T., LeBret, G. & Cleary, D. A. (1998). J. Solid State Chem. 141, 274–281. Web of Science CrossRef CAS Google Scholar
Jörgens, S., Mewis, A., Hoffmann, R.-D., Pöttgen, R. & Mosel, B. D. (2003). Z. Anorg. Allg. Chem. 629, 429–433. Google Scholar
Klingen, W., Ott, R. & Hahn, H. (1973). Z. Anorg. Allg. Chem. 396, 271–278. CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Stoe & Cie (2008). X-AREA. Stoe & Cie, Darmstadt, Germany. Google Scholar
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Alkaline earth hypothiodiphosphates were first reported by Klingen et al. (1973). The structure of the title compound, SrNa2(P2S6).8H2O, is isotypic with that of its calcium analogue, CaNa2(P2S6).8H2O (Ehrhardt & Gjikaj, 2010). The asymmetric unit of SrNa2(P2S6).8H2O contains one Sr2+ cation, two Na+ cations, one half of a (P2S6)4- anion and four water molecules (Fig. 1)
Na(1) is octahedrally coordinated by four H2O molecules and two sulfur atoms of two (P2S6)4- anions (Fig. 2). Na(2) is also octahedrally coordinated by two H2O molecules and four sulfur atoms of two (P2S6)4- anions (Fig. 3). The strontium cation is eightfold coordinated by water O atoms with Sr—O distances from 2.573 (2) to 2.6459 (19) Å. The SrO8 coordination polyhedron can be described as a bicapped trigonal prism.
The crystal structure is built up from layers of cations and anions extending parallel to (101). Within the layer each SrO8 polyhedron is connected by edge-sharing to two Na(1)O4S2 octahedra and to one Na(2)O2S4 octaedron. Furthermore, the Na(1)O4S2 octaedra are connected through common corners with two (P2S6)4- anions.
The discrete ethane-like (P2S6)4- anion has a staggered conformation and is located on a centre of inversion associated with the midpoint of the P—P bond. The corresponding P—P distance is 2.2405 (12) Å; the P—S distances range from 2.0162 (9) to 2.0248 (9) Å. These values agree well with those reported previously for other hypothiodiphosphate structures (Jörgens et al., 2003).
Neighbouring layers are held together by various O—H···S hydrogen bonding interactions. The donor—acceptor distances between O atoms of water molecules and S atoms of (P2S6)4- units range from 3.169 to 3.334 Å (Table 2).
With the exception of the M-O bond lengths (M = Ca, Sr), all other bond lengths and angles as well as the O—H···S hydrogen bonding scheme are very similar in the two isotypic MNa2(P2S6).8H2O structures.