metal-organic compounds
Hexaaquamagnesium bis(3-carboxy-4-hydroxybenzenesulfonate) dihydrate
aFaculty of Science and Technology, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia, and bSchool of Biomolecular and Physical Sciences, Griffith University, Nathan, Queensland 4111, Australia
*Correspondence e-mail: g.smith@qut.edu.au
In the 2O)6](C7H5O6S)2·2H2O, the octahedral complex cation lies on an inversion centre and is hydrogen bonded through the coordinated water molecules to the substituted benzenesulfonate monoanions and the water molecules of solvation. These interactions together with a carboxylic acid O—H⋯O(sulfonate) association give a three-dimensional structure.
of the title compound, [Mg(HRelated literature
For the structure of the isotypic MnII, CuII and CoII dihydrate complexes, see: Ma et al. (2003a,d); Abdelhak et al. (2005). For the structures of the analogous CoII, NiII and ZnII tetrahydrate complexes, see: Ma et al. (2003b,c,e).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supporting information
10.1107/S1600536811030777/tk2770sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811030777/tk2770Isup2.hkl
The title compound was synthesized by heating 218 mg (1 mmol) of 3-carboxy-4-hydroxybenzenesulfonic acid (5-sulfosalicylic acid) with an excess of MgCO3 in 50 ml of 1:1 ethanol–water under reflux for 10 min. After completion of the reaction, the unreacted MgCO3 was removed by filtration and the solution was allowed evaporate to incipient dryness at room temperature, giving small colourless prisms of the title compound from which a specimen was cleaved for the X-ray analysis.
Hydrogen atoms involved in hydrogen-bonding interactions were located by difference methods and their positional and isotropic displacement parameters were refined. Other H-atoms were included in the
at calculated positions [C–H = 0.93 Å and with Uiso(H) = 1.2Ueq(C), using a riding-model approximation.Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell
CrysAlis PRO (Oxford Diffraction, 2010); data reduction: CrysAlis PRO (Oxford Diffraction, 2010); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. Molecular configuration and atom naming scheme for the cation, anion and water species in the asymmetric unit of the title compound. Inter-species hydrogen bonds are shown as dashed lines and displacement ellipsoids are drawn at the 50% probability level. For symmetry code (i): -x, -y, -z. | |
Fig. 2. The hydrogen-bonding interactions in the title compound viewed down a. For symmetry codes, see Table 1. |
[Mg(H2O)6](C7H5O6S)2·2H2O | Z = 1 |
Mr = 602.78 | F(000) = 314 |
Triclinic, P1 | Dx = 1.613 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.8694 (4) Å | Cell parameters from 4714 reflections |
b = 6.9069 (4) Å | θ = 3.2–28.9° |
c = 14.3950 (8) Å | µ = 0.33 mm−1 |
α = 77.472 (5)° | T = 200 K |
β = 78.120 (4)° | Prism, colourless |
γ = 70.131 (5)° | 0.40 × 0.12 × 0.10 mm |
V = 620.51 (6) Å3 |
Oxford Diffraction Gemini-S CCD-detector diffractometer | 2899 independent reflections |
Radiation source: Enhance (Mo) X-ray source | 2553 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
ω scans | θmax = 28.8°, θmin = 3.2° |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) | h = −9→9 |
Tmin = 0.96, Tmax = 0.99 | k = −9→8 |
8134 measured reflections | l = −19→18 |
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)] = 0.032 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.086 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | w = 1/[σ2(Fo2) + (0.0388P)2 + 0.10P] where P = (Fo2 + 2Fc2)/3 |
2899 reflections | (Δ/σ)max = 0.001 |
209 parameters | Δρmax = 0.34 e Å−3 |
0 restraints | Δρmin = −0.43 e Å−3 |
[Mg(H2O)6](C7H5O6S)2·2H2O | γ = 70.131 (5)° |
Mr = 602.78 | V = 620.51 (6) Å3 |
Triclinic, P1 | Z = 1 |
a = 6.8694 (4) Å | Mo Kα radiation |
b = 6.9069 (4) Å | µ = 0.33 mm−1 |
c = 14.3950 (8) Å | T = 200 K |
α = 77.472 (5)° | 0.40 × 0.12 × 0.10 mm |
β = 78.120 (4)° |
Oxford Diffraction Gemini-S CCD-detector diffractometer | 2899 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) | 2553 reflections with I > 2σ(I) |
Tmin = 0.96, Tmax = 0.99 | Rint = 0.023 |
8134 measured reflections |
R[F2 > 2σ(F2)] = 0.032 | 0 restraints |
wR(F2) = 0.086 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | Δρmax = 0.34 e Å−3 |
2899 reflections | Δρmin = −0.43 e Å−3 |
209 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
S5 | 0.32291 (6) | 0.27288 (6) | 0.24107 (3) | 0.0205 (1) | |
O2 | −0.30636 (17) | 0.30257 (19) | 0.58938 (9) | 0.0293 (4) | |
O11 | 0.33290 (17) | 0.10533 (19) | 0.60809 (9) | 0.0282 (4) | |
O12 | 0.00797 (17) | 0.16915 (18) | 0.68922 (8) | 0.0285 (3) | |
O51 | 0.21125 (18) | 0.34405 (17) | 0.15798 (8) | 0.0282 (3) | |
O52 | 0.4428 (2) | 0.4036 (2) | 0.24880 (9) | 0.0358 (4) | |
O53 | 0.45513 (17) | 0.05481 (18) | 0.24189 (8) | 0.0288 (3) | |
C1 | 0.0565 (2) | 0.2280 (2) | 0.51806 (10) | 0.0168 (4) | |
C2 | −0.1584 (2) | 0.2911 (2) | 0.51141 (11) | 0.0198 (4) | |
C3 | −0.2240 (2) | 0.3455 (2) | 0.42131 (12) | 0.0235 (5) | |
C4 | −0.0799 (2) | 0.3391 (2) | 0.33881 (11) | 0.0223 (4) | |
C5 | 0.1338 (2) | 0.2784 (2) | 0.34503 (11) | 0.0182 (4) | |
C6 | 0.2005 (2) | 0.2238 (2) | 0.43408 (11) | 0.0176 (4) | |
C11 | 0.1284 (2) | 0.1655 (2) | 0.61309 (11) | 0.0193 (4) | |
Mg1 | 0.00000 | 0.00000 | 0.00000 | 0.0200 (2) | |
O1W | 0.0127 (2) | 0.0693 (2) | 0.12890 (9) | 0.0323 (4) | |
O2W | 0.3193 (2) | −0.1459 (2) | −0.01676 (11) | 0.0338 (4) | |
O3W | 0.0515 (2) | 0.27534 (19) | −0.06749 (9) | 0.0307 (4) | |
O4W | 0.5409 (2) | 0.7353 (2) | 0.13401 (10) | 0.0313 (4) | |
H2 | −0.244 (3) | 0.264 (3) | 0.6383 (17) | 0.045 (6)* | |
H3 | −0.36580 | 0.38640 | 0.41680 | 0.0280* | |
H4 | −0.12490 | 0.37510 | 0.27890 | 0.0270* | |
H6 | 0.34260 | 0.18390 | 0.43800 | 0.0210* | |
H11 | 0.369 (4) | 0.070 (3) | 0.6595 (18) | 0.049 (7)* | |
H11W | −0.002 (3) | −0.002 (3) | 0.1845 (18) | 0.049 (6)* | |
H12W | 0.067 (4) | 0.155 (4) | 0.1343 (17) | 0.050 (7)* | |
H21W | 0.395 (4) | −0.180 (4) | 0.025 (2) | 0.061 (8)* | |
H22W | 0.383 (5) | −0.180 (4) | −0.068 (2) | 0.083 (10)* | |
H31W | −0.028 (4) | 0.370 (4) | −0.0898 (17) | 0.044 (7)* | |
H32W | 0.177 (4) | 0.293 (4) | −0.0885 (17) | 0.055 (7)* | |
H41W | 0.490 (4) | 0.826 (4) | 0.1655 (18) | 0.058 (8)* | |
H42W | 0.514 (4) | 0.631 (4) | 0.1686 (18) | 0.055 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S5 | 0.0224 (2) | 0.0251 (2) | 0.0139 (2) | −0.0083 (2) | −0.0034 (1) | −0.0009 (1) |
O2 | 0.0175 (6) | 0.0402 (7) | 0.0254 (7) | −0.0054 (5) | 0.0016 (5) | −0.0055 (5) |
O11 | 0.0199 (6) | 0.0418 (7) | 0.0185 (6) | −0.0022 (5) | −0.0075 (5) | −0.0035 (5) |
O12 | 0.0263 (6) | 0.0358 (6) | 0.0176 (6) | −0.0060 (5) | −0.0002 (5) | −0.0007 (5) |
O51 | 0.0354 (6) | 0.0288 (6) | 0.0177 (6) | −0.0063 (5) | −0.0106 (5) | 0.0022 (4) |
O52 | 0.0433 (7) | 0.0494 (8) | 0.0254 (6) | −0.0322 (6) | −0.0010 (6) | −0.0027 (5) |
O53 | 0.0267 (6) | 0.0321 (6) | 0.0212 (6) | 0.0025 (5) | −0.0061 (5) | −0.0074 (5) |
C1 | 0.0171 (7) | 0.0134 (6) | 0.0189 (7) | −0.0034 (5) | −0.0042 (6) | −0.0014 (5) |
C2 | 0.0177 (7) | 0.0166 (7) | 0.0237 (8) | −0.0040 (6) | −0.0007 (6) | −0.0048 (6) |
C3 | 0.0154 (7) | 0.0246 (8) | 0.0301 (9) | −0.0028 (6) | −0.0067 (6) | −0.0058 (6) |
C4 | 0.0218 (7) | 0.0224 (7) | 0.0223 (8) | −0.0029 (6) | −0.0105 (6) | −0.0025 (6) |
C5 | 0.0192 (7) | 0.0174 (7) | 0.0173 (7) | −0.0052 (6) | −0.0030 (6) | −0.0017 (5) |
C6 | 0.0152 (7) | 0.0177 (7) | 0.0192 (7) | −0.0038 (5) | −0.0044 (6) | −0.0016 (5) |
C11 | 0.0206 (7) | 0.0168 (7) | 0.0190 (7) | −0.0033 (6) | −0.0036 (6) | −0.0029 (6) |
Mg1 | 0.0227 (4) | 0.0233 (4) | 0.0142 (4) | −0.0084 (3) | −0.0045 (3) | 0.0007 (3) |
O1W | 0.0492 (8) | 0.0395 (7) | 0.0156 (6) | −0.0245 (6) | −0.0067 (5) | −0.0005 (5) |
O2W | 0.0254 (6) | 0.0455 (8) | 0.0245 (7) | −0.0053 (6) | −0.0017 (6) | −0.0042 (6) |
O3W | 0.0247 (6) | 0.0250 (6) | 0.0371 (7) | −0.0078 (5) | −0.0063 (6) | 0.0079 (5) |
O4W | 0.0300 (7) | 0.0287 (7) | 0.0357 (7) | −0.0114 (6) | −0.0048 (6) | −0.0022 (6) |
S5—O51 | 1.4584 (15) | O2W—H21W | 0.82 (3) |
S5—O52 | 1.4466 (17) | O2W—H22W | 0.82 (3) |
S5—O53 | 1.4699 (15) | O3W—H32W | 0.89 (3) |
S5—C5 | 1.7661 (19) | O3W—H31W | 0.75 (3) |
Mg1—O1W | 2.0396 (17) | O4W—H42W | 0.84 (3) |
Mg1—O2W | 2.0664 (19) | O4W—H41W | 0.79 (3) |
Mg1—O3W | 2.0494 (17) | C1—C11 | 1.476 (2) |
Mg1—O1Wi | 2.0396 (17) | C1—C6 | 1.394 (2) |
Mg1—O2Wi | 2.0664 (19) | C1—C2 | 1.408 (2) |
Mg1—O3Wi | 2.0494 (17) | C2—C3 | 1.393 (2) |
O2—C2 | 1.347 (2) | C3—C4 | 1.379 (2) |
O11—C11 | 1.314 (2) | C4—C5 | 1.399 (2) |
O12—C11 | 1.229 (2) | C5—C6 | 1.382 (2) |
O2—H2 | 0.85 (2) | C3—H3 | 0.9300 |
O11—H11 | 0.79 (3) | C4—H4 | 0.9300 |
O1W—H11W | 0.85 (2) | C6—H6 | 0.9300 |
O1W—H12W | 0.82 (3) | ||
S5···H12W | 2.96 (3) | O1W···H22Wi | 2.83 (4) |
S5···H42W | 3.08 (3) | O2···H3v | 2.5300 |
S5···H11ii | 2.92 (2) | O2W···H32W | 2.87 (3) |
S5···H22Wiii | 2.91 (3) | O3W···H12W | 2.86 (2) |
O1W···O2W | 2.907 (3) | O4W···H32Wx | 1.87 (3) |
O1W···O3W | 2.879 (2) | O4W···H21Wxi | 1.91 (3) |
O1W···O51 | 2.824 (2) | O11···H6 | 2.3800 |
O1W···O12iv | 2.779 (2) | O11···H6ii | 2.5200 |
O1W···O2Wi | 2.900 (3) | O12···H11Wiv | 1.93 (2) |
O1W···O3Wi | 2.903 (2) | O12···H2 | 1.87 (2) |
O2···C3v | 3.324 (3) | O51···H4 | 2.5600 |
O2···O11vi | 3.151 (3) | O51···H31Wix | 2.10 (3) |
O2···O12 | 2.632 (2) | O51···H22Wiii | 2.78 (3) |
O2···O52vii | 3.207 (3) | O51···H12W | 2.00 (3) |
O2W···O3Wi | 2.926 (3) | O52···H6 | 2.8900 |
O2W···O1W | 2.907 (3) | O52···H2vii | 2.89 (2) |
O2W···O3W | 2.894 (2) | O52···H42W | 1.88 (3) |
O2W···O1Wi | 2.900 (3) | O53···H11ii | 1.92 (3) |
O2W···O4Wviii | 2.728 (3) | O53···H22Wiii | 2.61 (3) |
O3W···O2W | 2.894 (2) | O53···H41Wviii | 2.04 (3) |
O3W···O1W | 2.879 (2) | C1···C2iv | 3.515 (3) |
O3W···O51ix | 2.850 (2) | C1···C1vii | 3.511 (3) |
O3W···O1Wi | 2.903 (2) | C1···C2vii | 3.543 (3) |
O3W···O2Wi | 2.926 (3) | C2···C1vii | 3.543 (3) |
O3W···O4Wx | 2.748 (3) | C2···C6iv | 3.570 (3) |
O4W···O2Wxi | 2.728 (3) | C2···C6vii | 3.509 (3) |
O4W···O53xi | 2.803 (2) | C2···C1iv | 3.515 (3) |
O4W···O52 | 2.717 (2) | C3···C11vii | 3.568 (3) |
O4W···O3Wx | 2.748 (3) | C3···C11iv | 3.490 (3) |
O11···O2xii | 3.151 (3) | C3···O2v | 3.324 (3) |
O11···O53ii | 2.678 (2) | C4···C11vii | 3.529 (3) |
O11···C6ii | 3.264 (3) | C4···C11iv | 3.519 (3) |
O12···O1Wiv | 2.779 (2) | C6···C2iv | 3.570 (3) |
O12···O2 | 2.632 (2) | C6···C2vii | 3.509 (3) |
O51···O1W | 2.824 (2) | C6···O11ii | 3.264 (3) |
O51···O3Wix | 2.850 (2) | C11···C4vii | 3.529 (3) |
O52···O4W | 2.717 (2) | C11···C3iv | 3.490 (3) |
O52···O2vii | 3.207 (3) | C11···C3vii | 3.568 (3) |
O53···O4Wviii | 2.803 (2) | C11···C4iv | 3.519 (3) |
O53···O11ii | 2.678 (2) | C11···H2 | 2.38 (2) |
O1W···H21W | 2.92 (3) | ||
O51—S5—O52 | 114.10 (7) | Mg1—O2W—H21W | 126.5 (19) |
O51—S5—O53 | 110.20 (7) | H21W—O2W—H22W | 113 (3) |
O51—S5—C5 | 107.36 (7) | Mg1—O3W—H32W | 125.3 (17) |
O52—S5—O53 | 111.08 (8) | Mg1—O3W—H31W | 126 (2) |
O52—S5—C5 | 106.81 (7) | H31W—O3W—H32W | 107 (3) |
O53—S5—C5 | 106.91 (7) | H41W—O4W—H42W | 105 (3) |
O2W—Mg1—O3Wi | 90.64 (6) | C2—C1—C11 | 120.22 (13) |
O1Wi—Mg1—O3W | 90.48 (5) | C6—C1—C11 | 120.43 (13) |
O2Wi—Mg1—O3W | 90.64 (6) | C2—C1—C6 | 119.35 (13) |
O3W—Mg1—O3Wi | 180.00 | O2—C2—C1 | 122.58 (14) |
O1Wi—Mg1—O2Wi | 90.12 (6) | C1—C2—C3 | 119.67 (14) |
O1Wi—Mg1—O3Wi | 89.53 (5) | O2—C2—C3 | 117.75 (13) |
O2Wi—Mg1—O3Wi | 89.36 (6) | C2—C3—C4 | 120.41 (14) |
O1Wi—Mg1—O2W | 89.88 (6) | C3—C4—C5 | 120.14 (14) |
O1W—Mg1—O2W | 90.12 (6) | C4—C5—C6 | 119.90 (14) |
O1W—Mg1—O3W | 89.53 (5) | S5—C5—C6 | 118.58 (11) |
O1W—Mg1—O1Wi | 180.00 | S5—C5—C4 | 121.52 (12) |
O1W—Mg1—O2Wi | 89.88 (6) | C1—C6—C5 | 120.53 (14) |
O1W—Mg1—O3Wi | 90.48 (5) | O11—C11—O12 | 123.56 (14) |
O2W—Mg1—O3W | 89.36 (6) | O11—C11—C1 | 113.42 (13) |
O2W—Mg1—O2Wi | 180.00 | O12—C11—C1 | 123.02 (14) |
C2—O2—H2 | 107.2 (15) | C2—C3—H3 | 120.00 |
C11—O11—H11 | 112 (2) | C4—C3—H3 | 120.00 |
Mg1—O1W—H11W | 128.1 (14) | C3—C4—H4 | 120.00 |
Mg1—O1W—H12W | 123.6 (17) | C5—C4—H4 | 120.00 |
H11W—O1W—H12W | 106 (2) | C1—C6—H6 | 120.00 |
Mg1—O2W—H22W | 121 (2) | C5—C6—H6 | 120.00 |
O51—S5—C5—C4 | 1.22 (13) | C2—C1—C11—O11 | 178.30 (13) |
O51—S5—C5—C6 | −177.90 (11) | C2—C1—C11—O12 | −1.5 (2) |
O52—S5—C5—C4 | 124.00 (12) | C6—C1—C11—O11 | −1.25 (19) |
O52—S5—C5—C6 | −55.12 (13) | C6—C1—C11—O12 | 178.95 (13) |
O53—S5—C5—C4 | −117.02 (12) | O2—C2—C3—C4 | 179.28 (13) |
O53—S5—C5—C6 | 63.86 (13) | C1—C2—C3—C4 | −0.4 (2) |
C6—C1—C2—O2 | −178.76 (13) | C2—C3—C4—C5 | −0.2 (2) |
C6—C1—C2—C3 | 0.9 (2) | C3—C4—C5—S5 | −178.80 (11) |
C11—C1—C2—O2 | 1.7 (2) | C3—C4—C5—C6 | 0.3 (2) |
C11—C1—C2—C3 | −178.65 (12) | S5—C5—C6—C1 | 179.34 (10) |
C2—C1—C6—C5 | −0.8 (2) | C4—C5—C6—C1 | 0.2 (2) |
C11—C1—C6—C5 | 178.75 (12) |
Symmetry codes: (i) −x, −y, −z; (ii) −x+1, −y, −z+1; (iii) −x+1, −y, −z; (iv) −x, −y, −z+1; (v) −x−1, −y+1, −z+1; (vi) x−1, y, z; (vii) −x, −y+1, −z+1; (viii) x, y−1, z; (ix) −x, −y+1, −z; (x) −x+1, −y+1, −z; (xi) x, y+1, z; (xii) x+1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···O12 | 0.85 (2) | 1.87 (2) | 2.632 (2) | 149 (2) |
O11—H11···O53ii | 0.79 (3) | 1.92 (3) | 2.678 (2) | 161 (3) |
O1W—H11W···O12iv | 0.85 (2) | 1.93 (2) | 2.779 (2) | 175 (2) |
O1W—H12W···O51 | 0.82 (3) | 2.00 (3) | 2.824 (2) | 175 (2) |
O2W—H21W···O4Wviii | 0.82 (3) | 1.91 (3) | 2.728 (3) | 173 (3) |
O3W—H31W···O51ix | 0.75 (3) | 2.10 (3) | 2.850 (2) | 171 (3) |
O3W—H32W···O4Wx | 0.89 (3) | 1.87 (3) | 2.748 (3) | 167 (2) |
O4W—H41W···O53xi | 0.79 (3) | 2.04 (3) | 2.803 (2) | 162 (3) |
O4W—H42W···O52 | 0.84 (3) | 1.88 (3) | 2.717 (2) | 178 (3) |
C3—H3···O2v | 0.93 | 2.53 | 3.324 (3) | 144 |
C4—H4···O51 | 0.93 | 2.56 | 2.940 (3) | 105 |
C6—H6···O11 | 0.93 | 2.38 | 2.705 (2) | 100 |
C6—H6···O11ii | 0.93 | 2.52 | 3.264 (3) | 137 |
Symmetry codes: (ii) −x+1, −y, −z+1; (iv) −x, −y, −z+1; (v) −x−1, −y+1, −z+1; (viii) x, y−1, z; (ix) −x, −y+1, −z; (x) −x+1, −y+1, −z; (xi) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | [Mg(H2O)6](C7H5O6S)2·2H2O |
Mr | 602.78 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 200 |
a, b, c (Å) | 6.8694 (4), 6.9069 (4), 14.3950 (8) |
α, β, γ (°) | 77.472 (5), 78.120 (4), 70.131 (5) |
V (Å3) | 620.51 (6) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 0.33 |
Crystal size (mm) | 0.40 × 0.12 × 0.10 |
Data collection | |
Diffractometer | Oxford Diffraction Gemini-S CCD-detector diffractometer |
Absorption correction | Multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) |
Tmin, Tmax | 0.96, 0.99 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8134, 2899, 2553 |
Rint | 0.023 |
(sin θ/λ)max (Å−1) | 0.678 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.086, 1.14 |
No. of reflections | 2899 |
No. of parameters | 209 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.34, −0.43 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2010), SIR92 (Altomare et al., 1994), SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···O12 | 0.85 (2) | 1.87 (2) | 2.632 (2) | 149 (2) |
O11—H11···O53i | 0.79 (3) | 1.92 (3) | 2.678 (2) | 161 (3) |
O1W—H11W···O12ii | 0.85 (2) | 1.93 (2) | 2.779 (2) | 175 (2) |
O1W—H12W···O51 | 0.82 (3) | 2.00 (3) | 2.824 (2) | 175 (2) |
O2W—H21W···O4Wiii | 0.82 (3) | 1.91 (3) | 2.728 (3) | 173 (3) |
O3W—H31W···O51iv | 0.75 (3) | 2.10 (3) | 2.850 (2) | 171 (3) |
O3W—H32W···O4Wv | 0.89 (3) | 1.87 (3) | 2.748 (3) | 167 (2) |
O4W—H41W···O53vi | 0.79 (3) | 2.04 (3) | 2.803 (2) | 162 (3) |
O4W—H42W···O52 | 0.84 (3) | 1.88 (3) | 2.717 (2) | 178 (3) |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x, −y, −z+1; (iii) x, y−1, z; (iv) −x, −y+1, −z; (v) −x+1, −y+1, −z; (vi) x, y+1, z. |
Acknowledgements
The authors acknowledge financial support from the Australian Research Council, the Faculty of Science and Technology and the University Library, Queensland University of Technology, and Griffith University.
References
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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.
The title compound, [Mg(H2O)6]2+ 2(C7H5O6S-). 2(H2O) was obtained from the reaction of 3-carboxy-4-hydroxybenzenesulfonic acid (5-sulfosalicylic acid, 5-SSA) with MgCO3 and the structure is reported here In the structure of this compound (Fig. 1), the octahedral cationic Mg complex cations lie on crystallographic inversion centres [Mg—O, 2.0396 (17)–2.0664 (19) Å]. This complex is isomorphous with other divalent first transition metal–5-SSA complexes with the same basic dihydrate formula [M(H2O)6] 2(5-SSA-). 2(H2O), [M = Mn (Ma et al., 2003a); Co (Abdelhak et al., 2005); Cu (Ma et al., 2003d)]. These complexes are also similar to the tetrahydrate analogues {[M(H2O)6] 2(5-SSA-). 4(H2O)}, having triclinic unit cells with comparable cell parameters e.g. CoII (Ma et al., 2003b) and Ni (Ma et al., 2003c) and Zn (Ma et al., 2003e).
The coordinated water molecules are involved in a number of O—H···O hydrogen-bonding interactions with sulfonate and carboxylate O acceptors of the uncoordinated 5-SSA monoanions and the water molecules of solvation (Table 1) and together with a carboxylic acid O—H···Osulfonate hydrogen bond form a three-dimensional structure (Fig. 2). In the anion there is the intramolecular cyclic phenol O—H···Ocarboxyl hydrogen bond which is invariably present in this monoanion (Ma et al., 2003a). One H of one of the coordinated water molecules (H22W) has no reasonable acceptor in the structure.