


Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S160053681300682X/sj5305sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S160053681300682X/sj5305Isup2.hkl |
CCDC reference: 935589
Key indicators
- Single-crystal X-ray study
- T = 200 K
- Mean
(C-C) = 0.002 Å
- R factor = 0.036
- wR factor = 0.095
- Data-to-parameter ratio = 13.5
checkCIF/PLATON results
No syntax errors found
Alert level C PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 4.174 PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 8
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? PLAT007_ALERT_5_G Note: Number of Unrefined D-H Atoms ............ 16 PLAT154_ALERT_1_G The su's on the Cell Angles are Equal .......... 0.00400 Deg.
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 2 ALERT level C = Check. Ensure it is not caused by an omission or oversight 3 ALERT level G = General information/check it is not something unexpected 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 0 ALERT type 4 Improvement, methodology, query or suggestion 2 ALERT type 5 Informative message, check
The title compound was synthesized by the addition of excess MgCO3 to 15 ml of a hot aqueous ethanolic solution (10:1) of 3,5-dinitrobenzoic acid (0.1 g). After completion of the reaction, the excess MgCO3 was removed by filtration and the solution was allowed to evaporate to partial dryness at room temperature, giving colourless plates of the title compound from which a specimen was cleaved for the X-ray analysis.
Hydrogen atoms on all water molecules were located by difference methods and both positional and isotropic displacement parameters were initially refined but these were then allowed to ride, with Uiso(H) = 1.5Ueq(O). Other H-atoms were included in the refinement at calculated positions [C—H = 0.93 Å] with Uiso(H) = 1.2Ueq(C) also using a riding-model approximation.
Data collection: CrysAlis PRO (Agilent, 2012); cell refinement: CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis PRO (Agilent, 2012); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 2012); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON (Spek, 2009).
[Mg(C7H3N2O6)2(H2O)4]·4H2O | Z = 2 |
Mr = 590.67 | F(000) = 612 |
Triclinic, P1 | Dx = 1.618 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.1748 (3) Å | Cell parameters from 4480 reflections |
b = 11.7299 (6) Å | θ = 3.3–28.8° |
c = 15.0103 (7) Å | µ = 0.18 mm−1 |
α = 103.224 (4)° | T = 200 K |
β = 98.569 (4)° | Plate, colourless |
γ = 92.181 (4)° | 0.32 × 0.22 × 0.10 mm |
V = 1212.62 (10) Å3 |
Oxford Diffraction Gemini-S CCD-detector diffractometer | 4764 independent reflections |
Radiation source: Enhance(Mo) X-ray source | 3969 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 16.077 pixels mm-1 | θmax = 26.0°, θmin = 3.3° |
ω scans | h = −8→8 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | k = −14→14 |
Tmin = 0.970, Tmax = 0.980 | l = −18→18 |
15059 measured reflections |
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) = 0.095 | H-atom parameters constrained |
S = 0.94 | w = 1/[σ2(Fo2) + (0.0457P)2 + 0.5437P] where P = (Fo2 + 2Fc2)/3 |
4764 reflections | (Δ/σ)max < 0.001 |
352 parameters | Δρmax = 0.29 e Å−3 |
0 restraints | Δρmin = −0.20 e Å−3 |
[Mg(C7H3N2O6)2(H2O)4]·4H2O | γ = 92.181 (4)° |
Mr = 590.67 | V = 1212.62 (10) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.1748 (3) Å | Mo Kα radiation |
b = 11.7299 (6) Å | µ = 0.18 mm−1 |
c = 15.0103 (7) Å | T = 200 K |
α = 103.224 (4)° | 0.32 × 0.22 × 0.10 mm |
β = 98.569 (4)° |
Oxford Diffraction Gemini-S CCD-detector diffractometer | 4764 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | 3969 reflections with I > 2σ(I) |
Tmin = 0.970, Tmax = 0.980 | Rint = 0.027 |
15059 measured reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.095 | H-atom parameters constrained |
S = 0.94 | Δρmax = 0.29 e Å−3 |
4764 reflections | Δρmin = −0.20 e Å−3 |
352 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 | ||
Mg1 | 0.72688 (8) | 0.24686 (5) | 0.49442 (4) | 0.0206 (2) | |
O1W | 0.45776 (18) | 0.27809 (11) | 0.43347 (9) | 0.0315 (4) | |
O2W | 0.80173 (18) | 0.42361 (10) | 0.55275 (8) | 0.0287 (4) | |
O3W | 0.99516 (17) | 0.20820 (11) | 0.55261 (9) | 0.0289 (4) | |
O4W | 0.65142 (18) | 0.06937 (10) | 0.43663 (8) | 0.0283 (4) | |
O11A | 0.62746 (18) | 0.23370 (10) | 0.61171 (8) | 0.0255 (4) | |
O11B | 0.83217 (18) | 0.26394 (10) | 0.37996 (8) | 0.0278 (4) | |
O12A | 0.5701 (2) | 0.41362 (10) | 0.68573 (9) | 0.0318 (4) | |
O12B | 0.8071 (2) | 0.08551 (11) | 0.28425 (9) | 0.0325 (4) | |
O31A | 0.31477 (19) | 0.44416 (11) | 0.97944 (9) | 0.0340 (4) | |
O31B | 0.8787 (2) | 0.06471 (11) | −0.04095 (9) | 0.0351 (4) | |
O32A | 0.4359 (3) | 0.33267 (14) | 1.06560 (10) | 0.0526 (6) | |
O32B | 1.0519 (2) | 0.20264 (14) | −0.06886 (10) | 0.0476 (5) | |
O51A | 0.5101 (2) | −0.07040 (12) | 0.88966 (10) | 0.0432 (5) | |
O51B | 1.0734 (2) | 0.59134 (12) | 0.13968 (10) | 0.0420 (5) | |
O52A | 0.6406 (2) | −0.08279 (12) | 0.76731 (10) | 0.0429 (5) | |
O52B | 0.9300 (2) | 0.60972 (12) | 0.25868 (10) | 0.0447 (5) | |
N3A | 0.3977 (2) | 0.35844 (14) | 0.99081 (10) | 0.0303 (5) | |
N3B | 0.9615 (2) | 0.16217 (13) | −0.01841 (10) | 0.0273 (5) | |
N5A | 0.5629 (2) | −0.02866 (13) | 0.82933 (11) | 0.0300 (5) | |
N5B | 0.9901 (2) | 0.55022 (13) | 0.19201 (11) | 0.0288 (5) | |
C1A | 0.5416 (2) | 0.25645 (14) | 0.75959 (11) | 0.0191 (5) | |
C1B | 0.8897 (2) | 0.25074 (15) | 0.22763 (11) | 0.0221 (5) | |
C2A | 0.4858 (2) | 0.32878 (14) | 0.83639 (11) | 0.0215 (5) | |
C2B | 0.9050 (2) | 0.18121 (15) | 0.14109 (11) | 0.0229 (5) | |
C3A | 0.4564 (2) | 0.28082 (15) | 0.90967 (11) | 0.0235 (5) | |
C3B | 0.9496 (2) | 0.23575 (15) | 0.07369 (11) | 0.0227 (5) | |
C4A | 0.4796 (2) | 0.16471 (15) | 0.91068 (12) | 0.0255 (5) | |
C4B | 0.9805 (2) | 0.35601 (15) | 0.08781 (12) | 0.0245 (5) | |
C5A | 0.5332 (2) | 0.09582 (14) | 0.83218 (12) | 0.0226 (5) | |
C5B | 0.9603 (2) | 0.42181 (15) | 0.17419 (12) | 0.0228 (5) | |
C6A | 0.5640 (2) | 0.13877 (14) | 0.75691 (11) | 0.0211 (5) | |
C6B | 0.9152 (2) | 0.37241 (15) | 0.24432 (11) | 0.0227 (5) | |
C11A | 0.5832 (2) | 0.30567 (14) | 0.67950 (11) | 0.0211 (5) | |
C11B | 0.8402 (2) | 0.19519 (15) | 0.30354 (12) | 0.0234 (5) | |
O5W | 0.21801 (18) | 0.07011 (11) | 0.44221 (9) | 0.0295 (4) | |
O6W | 0.75569 (18) | 0.58555 (11) | 0.44724 (9) | 0.0298 (4) | |
O7W | 1.0086 (2) | 0.11013 (12) | 0.70823 (9) | 0.0413 (5) | |
O8W | 0.4051 (3) | 0.34282 (12) | 0.27062 (10) | 0.0526 (6) | |
H2A | 0.46860 | 0.40750 | 0.83860 | 0.0260* | |
H2B | 0.88570 | 0.09990 | 0.12880 | 0.0270* | |
H4A | 0.46040 | 0.13470 | 0.96110 | 0.0310* | |
H4B | 1.01310 | 0.39060 | 0.04180 | 0.0290* | |
H6A | 0.59920 | 0.08960 | 0.70520 | 0.0250* | |
H6B | 0.90230 | 0.41970 | 0.30160 | 0.0270* | |
H11W | 0.43930 | 0.30080 | 0.37910 | 0.0470* | |
H12W | 0.37960 | 0.31880 | 0.46530 | 0.0470* | |
H21W | 0.73890 | 0.44440 | 0.58890 | 0.0430* | |
H22W | 0.79040 | 0.47460 | 0.51890 | 0.0430* | |
H31W | 1.01100 | 0.18470 | 0.59930 | 0.0430* | |
H32W | 1.05640 | 0.16380 | 0.51110 | 0.0430* | |
H41W | 0.69830 | 0.04970 | 0.39120 | 0.0420* | |
H42W | 0.68820 | 0.02370 | 0.46960 | 0.0420* | |
H51W | 0.16520 | 0.02280 | 0.39150 | 0.0440* | |
H52W | 0.30810 | 0.11320 | 0.43140 | 0.0440* | |
H61W | 0.66770 | 0.57420 | 0.39940 | 0.0450* | |
H62W | 0.84670 | 0.63140 | 0.44130 | 0.0450* | |
H71W | 1.07840 | 0.05610 | 0.72630 | 0.0620* | |
H72W | 1.00000 | 0.16100 | 0.75820 | 0.0620* | |
H81W | 0.42210 | 0.41470 | 0.26020 | 0.0790* | |
H82W | 0.40670 | 0.28650 | 0.22020 | 0.0790* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Mg1 | 0.0281 (3) | 0.0207 (3) | 0.0153 (3) | 0.0025 (2) | 0.0077 (2) | 0.0060 (2) |
O1W | 0.0356 (7) | 0.0391 (8) | 0.0244 (7) | 0.0139 (6) | 0.0088 (5) | 0.0129 (6) |
O2W | 0.0430 (8) | 0.0220 (6) | 0.0251 (7) | 0.0031 (5) | 0.0129 (6) | 0.0089 (5) |
O3W | 0.0328 (7) | 0.0321 (7) | 0.0250 (7) | 0.0092 (5) | 0.0088 (5) | 0.0097 (6) |
O4W | 0.0399 (7) | 0.0237 (6) | 0.0228 (6) | 0.0013 (5) | 0.0099 (5) | 0.0059 (5) |
O11A | 0.0404 (7) | 0.0216 (6) | 0.0179 (6) | 0.0038 (5) | 0.0136 (5) | 0.0056 (5) |
O11B | 0.0415 (7) | 0.0256 (6) | 0.0190 (6) | 0.0001 (5) | 0.0136 (5) | 0.0055 (5) |
O12A | 0.0574 (9) | 0.0193 (6) | 0.0236 (7) | 0.0065 (6) | 0.0152 (6) | 0.0088 (5) |
O12B | 0.0526 (8) | 0.0236 (7) | 0.0247 (7) | 0.0023 (6) | 0.0136 (6) | 0.0078 (5) |
O31A | 0.0372 (7) | 0.0306 (7) | 0.0344 (8) | 0.0046 (6) | 0.0177 (6) | 0.0003 (6) |
O31B | 0.0460 (8) | 0.0303 (7) | 0.0251 (7) | 0.0022 (6) | 0.0021 (6) | 0.0010 (6) |
O32A | 0.0864 (12) | 0.0571 (10) | 0.0185 (7) | 0.0109 (9) | 0.0189 (7) | 0.0099 (7) |
O32B | 0.0645 (10) | 0.0541 (10) | 0.0262 (8) | −0.0070 (8) | 0.0260 (7) | 0.0035 (7) |
O51A | 0.0639 (10) | 0.0333 (8) | 0.0357 (8) | −0.0119 (7) | 0.0008 (7) | 0.0221 (7) |
O51B | 0.0491 (9) | 0.0371 (8) | 0.0434 (9) | −0.0119 (7) | 0.0087 (7) | 0.0187 (7) |
O52A | 0.0676 (10) | 0.0223 (7) | 0.0389 (8) | 0.0090 (7) | 0.0113 (7) | 0.0047 (6) |
O52B | 0.0724 (11) | 0.0252 (7) | 0.0356 (8) | 0.0060 (7) | 0.0147 (7) | 0.0014 (6) |
N3A | 0.0367 (9) | 0.0340 (9) | 0.0208 (8) | −0.0016 (7) | 0.0129 (7) | 0.0034 (7) |
N3B | 0.0321 (8) | 0.0322 (9) | 0.0179 (7) | 0.0062 (7) | 0.0059 (6) | 0.0048 (7) |
N5A | 0.0414 (9) | 0.0209 (8) | 0.0271 (8) | −0.0037 (7) | −0.0023 (7) | 0.0104 (7) |
N5B | 0.0337 (8) | 0.0254 (8) | 0.0264 (8) | −0.0017 (6) | −0.0012 (7) | 0.0090 (7) |
C1A | 0.0215 (8) | 0.0205 (8) | 0.0159 (8) | 0.0001 (6) | 0.0035 (6) | 0.0054 (7) |
C1B | 0.0234 (8) | 0.0258 (9) | 0.0193 (8) | 0.0033 (7) | 0.0076 (7) | 0.0067 (7) |
C2A | 0.0260 (9) | 0.0204 (8) | 0.0188 (8) | 0.0029 (7) | 0.0053 (7) | 0.0051 (7) |
C2B | 0.0267 (9) | 0.0227 (9) | 0.0203 (9) | 0.0021 (7) | 0.0073 (7) | 0.0048 (7) |
C3A | 0.0269 (9) | 0.0278 (9) | 0.0160 (8) | 0.0013 (7) | 0.0077 (7) | 0.0033 (7) |
C3B | 0.0242 (9) | 0.0284 (9) | 0.0160 (8) | 0.0041 (7) | 0.0064 (7) | 0.0042 (7) |
C4A | 0.0298 (9) | 0.0313 (10) | 0.0178 (8) | −0.0032 (7) | 0.0047 (7) | 0.0114 (7) |
C4B | 0.0254 (9) | 0.0307 (9) | 0.0204 (9) | 0.0003 (7) | 0.0069 (7) | 0.0102 (8) |
C5A | 0.0278 (9) | 0.0187 (8) | 0.0214 (9) | −0.0011 (7) | 0.0017 (7) | 0.0067 (7) |
C5B | 0.0237 (8) | 0.0226 (9) | 0.0225 (9) | 0.0005 (7) | 0.0031 (7) | 0.0071 (7) |
C6A | 0.0242 (8) | 0.0216 (8) | 0.0173 (8) | 0.0006 (7) | 0.0051 (7) | 0.0034 (7) |
C6B | 0.0247 (9) | 0.0265 (9) | 0.0167 (8) | 0.0024 (7) | 0.0055 (7) | 0.0034 (7) |
C11A | 0.0265 (9) | 0.0220 (9) | 0.0160 (8) | 0.0018 (7) | 0.0054 (7) | 0.0057 (7) |
C11B | 0.0266 (9) | 0.0254 (9) | 0.0198 (9) | 0.0039 (7) | 0.0072 (7) | 0.0061 (7) |
O5W | 0.0327 (7) | 0.0281 (7) | 0.0284 (7) | −0.0004 (5) | 0.0101 (5) | 0.0053 (6) |
O6W | 0.0316 (7) | 0.0293 (7) | 0.0319 (7) | 0.0014 (5) | 0.0073 (6) | 0.0130 (6) |
O7W | 0.0530 (9) | 0.0423 (8) | 0.0308 (8) | 0.0173 (7) | 0.0087 (7) | 0.0097 (7) |
O8W | 0.1022 (14) | 0.0273 (8) | 0.0264 (8) | 0.0089 (8) | 0.0032 (8) | 0.0064 (6) |
Mg1—O1W | 2.0929 (14) | O6W—H62W | 0.8600 |
Mg1—O2W | 2.0732 (13) | O7W—H72W | 0.8600 |
Mg1—O3W | 2.1024 (14) | O7W—H71W | 0.8900 |
Mg1—O4W | 2.0804 (13) | O8W—H81W | 0.9000 |
Mg1—O11A | 2.0304 (13) | O8W—H82W | 0.8900 |
Mg1—O11B | 2.0237 (13) | N3A—C3A | 1.471 (2) |
O11A—C11A | 1.254 (2) | N3B—C3B | 1.469 (2) |
O11B—C11B | 1.253 (2) | N5A—C5A | 1.476 (2) |
O12A—C11A | 1.256 (2) | N5B—C5B | 1.470 (2) |
O12B—C11B | 1.258 (2) | C1A—C2A | 1.387 (2) |
O31A—N3A | 1.220 (2) | C1A—C6A | 1.388 (2) |
O31B—N3B | 1.219 (2) | C1A—C11A | 1.510 (2) |
O32A—N3A | 1.223 (2) | C1B—C6B | 1.391 (3) |
O32B—N3B | 1.228 (2) | C1B—C11B | 1.514 (2) |
O51A—N5A | 1.222 (2) | C1B—C2B | 1.389 (2) |
O51B—N5B | 1.224 (2) | C2A—C3A | 1.384 (2) |
O52A—N5A | 1.221 (2) | C2B—C3B | 1.383 (2) |
O52B—N5B | 1.227 (2) | C3A—C4A | 1.382 (3) |
O1W—H11W | 0.9100 | C3B—C4B | 1.382 (3) |
O1W—H12W | 0.8800 | C4A—C5A | 1.383 (2) |
O2W—H21W | 0.7600 | C4B—C5B | 1.380 (2) |
O2W—H22W | 0.8700 | C5A—C6A | 1.380 (2) |
O3W—H32W | 0.9000 | C5B—C6B | 1.384 (2) |
O3W—H31W | 0.8000 | C2A—H2A | 0.9300 |
O4W—H41W | 0.8000 | C2B—H2B | 0.9300 |
O4W—H42W | 0.8300 | C4A—H4A | 0.9300 |
O5W—H51W | 0.8600 | C4B—H4B | 0.9300 |
O5W—H52W | 0.8600 | C6A—H6A | 0.9300 |
O6W—H61W | 0.8600 | C6B—H6B | 0.9300 |
Mg1···H52W | 3.2400 | O12B···H2B | 2.5200 |
Mg1···H62Wi | 3.2400 | O12B···H41W | 2.0000 |
O1W···O2W | 3.0289 (18) | O12B···H71Wvi | 1.8700 |
O1W···O4W | 2.8669 (18) | O31A···H4Bx | 2.5900 |
O1W···O5W | 2.9702 (19) | O31A···H2A | 2.4900 |
O1W···O8W | 2.700 (2) | O31B···H2B | 2.4800 |
O1W···O11A | 2.9371 (18) | O31B···H2Bxi | 2.8400 |
O1W···O11B | 2.9163 (18) | O32A···H81Wvii | 2.8800 |
O1W···O6Wii | 2.7934 (19) | O32A···H4A | 2.5200 |
O2W···O12A | 2.8001 (18) | O32A···H82Wvii | 2.5400 |
O2W···O1W | 3.0289 (18) | O32B···H4B | 2.4900 |
O2W···O3W | 2.9285 (18) | O32B···H72Wviii | 2.5000 |
O2W···O6W | 2.7375 (18) | O51A···H82Wiv | 2.8300 |
O2W···O11A | 2.8859 (17) | O51A···H4Axiv | 2.5100 |
O2W···O11B | 2.8740 (17) | O51A···H2Biv | 2.8100 |
O2W···C11A | 3.150 (2) | O51A···H4A | 2.4600 |
O2W···O6Wi | 3.1813 (19) | O51B···H4B | 2.4600 |
O3W···O11A | 2.9108 (18) | O51B···H4Bxii | 2.7600 |
O3W···O6Wi | 2.9522 (19) | O52A···H82Wiv | 2.4500 |
O3W···O2W | 2.9285 (18) | O52A···H6A | 2.4200 |
O3W···O4W | 2.9804 (18) | O52B···H62W | 2.8500 |
O3W···O5Wiii | 2.7722 (18) | O52B···H6B | 2.4700 |
O3W···O7W | 2.8213 (19) | O52B···H31Wi | 2.8000 |
O3W···O52Bi | 3.093 (2) | O52B···H72Wi | 2.7900 |
O3W···O11B | 2.9054 (18) | N3A···O31Aix | 2.951 (2) |
O4W···O12B | 2.7310 (18) | N3A···O32Bx | 2.923 (2) |
O4W···O5W | 3.1235 (19) | N3B···O31Bxi | 3.194 (2) |
O4W···C11B | 3.163 (2) | N5A···O12Biv | 2.897 (2) |
O4W···O1W | 2.8669 (18) | N5A···O31Bvii | 2.765 (2) |
O4W···O3W | 2.9804 (18) | N5B···O31Aii | 3.134 (2) |
O4W···O5Wiv | 2.7986 (18) | C1A···O51Bi | 3.201 (2) |
O4W···O11A | 2.9144 (17) | C2A···O52Bii | 3.290 (2) |
O4W···O11B | 2.9336 (17) | C2A···O51Bi | 3.208 (2) |
O5W···O1W | 2.9702 (19) | C2B···O51Aiv | 3.130 (2) |
O5W···O4W | 3.1235 (19) | C3A···O32Bx | 3.095 (2) |
O5W···O7Wiv | 2.9449 (19) | C4A···O32Bx | 3.167 (2) |
O5W···O4Wiv | 2.7986 (18) | C4A···O51Axiv | 3.416 (2) |
O5W···O3Wv | 2.7722 (18) | C4A···O31Bvii | 3.183 (2) |
O6W···O12Aii | 2.8404 (19) | C4B···O32Axiii | 3.349 (3) |
O6W···O2Wi | 3.1813 (19) | C4B···O31Axiii | 3.348 (2) |
O6W···O3Wi | 2.9522 (19) | C5A···O12Biv | 3.189 (2) |
O6W···O2W | 2.7375 (18) | C5A···O31Bvii | 2.981 (2) |
O6W···C11Aii | 3.336 (2) | C6A···O7W | 3.389 (2) |
O6W···O1Wii | 2.7934 (19) | C11A···O6Wii | 3.336 (2) |
O7W···O52Bi | 3.212 (2) | C11A···O51Bi | 3.343 (2) |
O7W···C6A | 3.389 (2) | C6A···H41Wiv | 3.0900 |
O7W···O5Wiv | 2.9449 (19) | C11A···H61Wii | 2.6400 |
O7W···O3W | 2.8213 (19) | C11A···H21W | 2.6600 |
O7W···O12Bvi | 2.708 (2) | C11B···H41W | 2.6400 |
O7W···O32Bvii | 3.236 (2) | C11B···H71Wvi | 2.9700 |
O8W···O12Aii | 2.7737 (19) | H2A···O31A | 2.4900 |
O8W···O52Aiv | 2.968 (2) | H2A···O12A | 2.5200 |
O8W···O32Aviii | 3.094 (2) | H2B···O51Aiv | 2.8100 |
O8W···O1W | 2.700 (2) | H2B···O12B | 2.5200 |
O11A···O1W | 2.9371 (18) | H2B···O31B | 2.4800 |
O11A···O3W | 2.9108 (18) | H2B···O31Bxi | 2.8400 |
O11A···O4W | 2.9144 (17) | H4A···O51Axiv | 2.5100 |
O11A···O2W | 2.8859 (17) | H4A···O32A | 2.5200 |
O11B···O3W | 2.9054 (18) | H4A···O51A | 2.4600 |
O11B···O2W | 2.8740 (17) | H4B···O31Axiii | 2.5900 |
O11B···O4W | 2.9336 (17) | H4B···O51Bxii | 2.7600 |
O11B···O1W | 2.9163 (18) | H4B···O32B | 2.4900 |
O12A···O6Wii | 2.8404 (19) | H4B···O51B | 2.4600 |
O12A···O2W | 2.8001 (18) | H6A···O52A | 2.4200 |
O12A···O8Wii | 2.7737 (19) | H6A···H51Wiv | 2.5900 |
O12B···N5Aiv | 2.897 (2) | H6A···O11A | 2.4500 |
O12B···O51Aiv | 3.164 (2) | H6A···O4Wiv | 2.8300 |
O12B···C5Aiv | 3.189 (2) | H6B···O52B | 2.4700 |
O12B···O7Wvi | 2.708 (2) | H6B···O11B | 2.4600 |
O12B···O52Aiv | 3.187 (2) | H11W···O8W | 1.7900 |
O12B···O4W | 2.7310 (18) | H11W···H82W | 2.3300 |
O31A···N3Aix | 2.951 (2) | H11W···H81W | 2.4500 |
O31A···O32Bx | 3.218 (2) | H12W···H52W | 2.3700 |
O31A···C4Bx | 3.348 (2) | H12W···H62Wii | 2.3100 |
O31A···O31Aix | 2.8352 (19) | H12W···O6Wii | 1.9300 |
O31A···N5Bii | 3.134 (2) | H12W···H61Wii | 2.2100 |
O31A···O51Bii | 3.036 (2) | H21W···O12A | 2.1100 |
O31B···O31Bxi | 2.6950 (19) | H21W···C11A | 2.6600 |
O31B···C5Aviii | 2.981 (2) | H22W···H61W | 2.4300 |
O31B···O51Aviii | 2.949 (2) | H22W···H62W | 2.4400 |
O31B···N5Aviii | 2.765 (2) | H22W···O6W | 1.8700 |
O31B···O52Aviii | 3.198 (2) | H31W···O52Bi | 2.8000 |
O31B···N3Bxi | 3.194 (2) | H31W···H72W | 2.4800 |
O31B···C4Aviii | 3.183 (2) | H31W···O7W | 2.0200 |
O32A···C4Bx | 3.349 (3) | H31W···H62Wi | 2.5900 |
O32A···O8Wvii | 3.094 (2) | H32W···H52Wiii | 2.3300 |
O32B···O51Bxii | 2.972 (2) | H32W···H51Wiii | 2.3900 |
O32B···N3Axiii | 2.923 (2) | H32W···H62Wi | 2.3900 |
O32B···O7Wviii | 3.236 (2) | H32W···O5Wiii | 1.8900 |
O32B···O31Axiii | 3.218 (2) | H41W···O12B | 2.0000 |
O32B···C4Axiii | 3.167 (2) | H41W···C11B | 2.6400 |
O32B···C3Axiii | 3.095 (2) | H41W···C6Aiv | 3.0900 |
O51A···O12Biv | 3.164 (2) | H42W···H52Wiv | 2.4200 |
O51A···C2Biv | 3.130 (2) | H42W···O5Wiv | 1.9700 |
O51A···C4Axiv | 3.416 (2) | H42W···H51Wiv | 2.3800 |
O51A···O31Bvii | 2.949 (2) | H51W···H42Wiv | 2.3800 |
O51B···O31Aii | 3.036 (2) | H51W···O7Wiv | 2.1100 |
O51B···O32Bxii | 2.972 (2) | H51W···H71Wiv | 2.2900 |
O51B···C11Ai | 3.343 (2) | H51W···H6Aiv | 2.5900 |
O51B···C2Ai | 3.208 (2) | H51W···H32Wv | 2.3900 |
O51B···C1Ai | 3.201 (2) | H52W···H12W | 2.3700 |
O52A···O8Wiv | 2.968 (2) | H52W···Mg1 | 3.2400 |
O52A···O12Biv | 3.187 (2) | H52W···O1W | 2.1700 |
O52A···O31Bvii | 3.198 (2) | H52W···H32Wv | 2.3300 |
O52B···C2Aii | 3.290 (2) | H52W···H42Wiv | 2.4200 |
O52B···O3Wi | 3.093 (2) | H52W···O4W | 2.5300 |
O52B···O7Wi | 3.212 (2) | H61W···O12Aii | 2.0000 |
O1W···H52W | 2.1700 | H61W···C11Aii | 2.6400 |
O2W···H62Wi | 2.6200 | H61W···H12Wii | 2.2100 |
O3W···H62Wi | 2.1400 | H61W···H22W | 2.4300 |
O4W···H6Aiv | 2.8300 | H62W···H31Wi | 2.5900 |
O4W···H52W | 2.5300 | H62W···H22W | 2.4400 |
O5W···H42Wiv | 1.9700 | H62W···O52B | 2.8500 |
O5W···H32Wv | 1.8900 | H62W···Mg1i | 3.2400 |
O6W···H12Wii | 1.9300 | H62W···O2Wi | 2.6200 |
O6W···H22W | 1.8700 | H62W···O3Wi | 2.1400 |
O7W···H31W | 2.0200 | H62W···H12Wii | 2.3100 |
O7W···H51Wiv | 2.1100 | H62W···H32Wi | 2.3900 |
O8W···H11W | 1.7900 | H71W···O12Bvi | 1.8700 |
O11A···H21W | 2.6800 | H71W···C11Bvi | 2.9700 |
O11A···H31W | 2.8600 | H71W···H51Wiv | 2.2900 |
O11A···H6A | 2.4500 | H72W···H31W | 2.4800 |
O11B···H41W | 2.7100 | H72W···O52Bi | 2.7900 |
O11B···H22W | 2.9000 | H72W···O32Bvii | 2.5000 |
O11B···H32W | 2.8500 | H81W···O32Aviii | 2.8800 |
O11B···H6B | 2.4600 | H81W···H11W | 2.4500 |
O11B···H11W | 2.8700 | H81W···O12Aii | 1.9900 |
O12A···H21W | 2.1100 | H82W···O32Aviii | 2.5400 |
O12A···H61Wii | 2.0000 | H82W···H11W | 2.3300 |
O12A···H2A | 2.5200 | H82W···O51Aiv | 2.8300 |
O12A···H81Wii | 1.9900 | H82W···O52Aiv | 2.4500 |
O1W—Mg1—O2W | 93.28 (6) | O51B—N5B—O52B | 123.98 (16) |
O1W—Mg1—O3W | 177.64 (6) | C6A—C1A—C11A | 119.51 (14) |
O1W—Mg1—O4W | 86.78 (6) | C2A—C1A—C6A | 120.12 (15) |
O1W—Mg1—O11A | 90.83 (6) | C2A—C1A—C11A | 120.35 (15) |
O1W—Mg1—O11B | 90.20 (6) | C2B—C1B—C11B | 120.41 (16) |
O2W—Mg1—O3W | 89.06 (6) | C6B—C1B—C11B | 119.53 (14) |
O2W—Mg1—O4W | 179.66 (6) | C2B—C1B—C6B | 120.04 (15) |
O2W—Mg1—O11A | 89.38 (5) | C1A—C2A—C3A | 118.30 (15) |
O2W—Mg1—O11B | 89.09 (5) | C1B—C2B—C3B | 118.44 (16) |
O3W—Mg1—O4W | 90.88 (6) | N3A—C3A—C4A | 118.58 (15) |
O3W—Mg1—O11A | 89.53 (6) | N3A—C3A—C2A | 117.81 (15) |
O3W—Mg1—O11B | 89.50 (6) | C2A—C3A—C4A | 123.62 (15) |
O4W—Mg1—O11A | 90.29 (5) | N3B—C3B—C2B | 118.31 (15) |
O4W—Mg1—O11B | 91.24 (5) | N3B—C3B—C4B | 118.16 (15) |
O11A—Mg1—O11B | 178.20 (6) | C2B—C3B—C4B | 123.52 (15) |
Mg1—O11A—C11A | 134.86 (11) | C3A—C4A—C5A | 115.94 (16) |
Mg1—O11B—C11B | 133.81 (12) | C3B—C4B—C5B | 116.09 (16) |
H11W—O1W—H12W | 103.00 | C4A—C5A—C6A | 122.98 (16) |
Mg1—O1W—H11W | 121.00 | N5A—C5A—C4A | 118.66 (15) |
Mg1—O1W—H12W | 122.00 | N5A—C5A—C6A | 118.35 (15) |
Mg1—O2W—H22W | 121.00 | N5B—C5B—C6B | 118.97 (15) |
H21W—O2W—H22W | 104.00 | C4B—C5B—C6B | 123.07 (17) |
Mg1—O2W—H21W | 108.00 | N5B—C5B—C4B | 117.96 (15) |
Mg1—O3W—H31W | 122.00 | C1A—C6A—C5A | 119.03 (15) |
Mg1—O3W—H32W | 113.00 | C1B—C6B—C5B | 118.81 (15) |
H31W—O3W—H32W | 108.00 | O11A—C11A—O12A | 125.65 (15) |
Mg1—O4W—H41W | 109.00 | O11A—C11A—C1A | 116.26 (15) |
Mg1—O4W—H42W | 116.00 | O12A—C11A—C1A | 118.09 (14) |
H41W—O4W—H42W | 105.00 | O12B—C11B—C1B | 117.76 (15) |
H51W—O5W—H52W | 110.00 | O11B—C11B—O12B | 125.84 (16) |
H61W—O6W—H62W | 110.00 | O11B—C11B—C1B | 116.38 (15) |
H71W—O7W—H72W | 105.00 | C3A—C2A—H2A | 121.00 |
H81W—O8W—H82W | 112.00 | C1A—C2A—H2A | 121.00 |
O32A—N3A—C3A | 117.58 (16) | C3B—C2B—H2B | 121.00 |
O31A—N3A—O32A | 124.23 (16) | C1B—C2B—H2B | 121.00 |
O31A—N3A—C3A | 118.19 (14) | C3A—C4A—H4A | 122.00 |
O31B—N3B—C3B | 118.03 (14) | C5A—C4A—H4A | 122.00 |
O32B—N3B—C3B | 118.34 (15) | C3B—C4B—H4B | 122.00 |
O31B—N3B—O32B | 123.62 (15) | C5B—C4B—H4B | 122.00 |
O51A—N5A—C5A | 117.93 (15) | C5A—C6A—H6A | 120.00 |
O52A—N5A—C5A | 117.70 (15) | C1A—C6A—H6A | 120.00 |
O51A—N5A—O52A | 124.36 (16) | C1B—C6B—H6B | 121.00 |
O52B—N5B—C5B | 117.88 (15) | C5B—C6B—H6B | 121.00 |
O51B—N5B—C5B | 118.14 (15) | ||
O1W—Mg1—O11A—C11A | −76.77 (16) | C11A—C1A—C6A—C5A | 177.32 (14) |
O2W—Mg1—O11A—C11A | 16.50 (16) | C6A—C1A—C11A—O11A | 3.6 (2) |
O3W—Mg1—O11A—C11A | 105.57 (16) | C2A—C1A—C11A—O12A | 1.7 (2) |
O4W—Mg1—O11A—C11A | −163.55 (16) | C2A—C1A—C6A—C5A | −1.1 (2) |
O1W—Mg1—O11B—C11B | −84.11 (16) | C11A—C1A—C2A—C3A | −177.50 (14) |
O2W—Mg1—O11B—C11B | −177.38 (16) | C6A—C1A—C2A—C3A | 0.9 (2) |
O3W—Mg1—O11B—C11B | 93.55 (16) | C2B—C1B—C6B—C5B | −1.6 (2) |
O4W—Mg1—O11B—C11B | 2.68 (16) | C6B—C1B—C2B—C3B | 1.3 (2) |
Mg1—O11A—C11A—O12A | 9.1 (3) | C11B—C1B—C2B—C3B | 179.69 (14) |
Mg1—O11A—C11A—C1A | −171.22 (11) | C6B—C1B—C11B—O11B | −2.7 (2) |
Mg1—O11B—C11B—O12B | −12.6 (3) | C2B—C1B—C11B—O12B | −2.6 (2) |
Mg1—O11B—C11B—C1B | 165.81 (11) | C11B—C1B—C6B—C5B | −179.97 (13) |
O31A—N3A—C3A—C4A | −154.62 (15) | C6B—C1B—C11B—O12B | 175.83 (15) |
O32A—N3A—C3A—C4A | 25.5 (2) | C2B—C1B—C11B—O11B | 178.90 (14) |
O31A—N3A—C3A—C2A | 25.5 (2) | C1A—C2A—C3A—N3A | 179.86 (14) |
O32A—N3A—C3A—C2A | −154.31 (17) | C1A—C2A—C3A—C4A | 0.0 (2) |
O31B—N3B—C3B—C2B | 21.9 (2) | C1B—C2B—C3B—N3B | −178.65 (13) |
O32B—N3B—C3B—C2B | −159.03 (15) | C1B—C2B—C3B—C4B | 0.2 (2) |
O32B—N3B—C3B—C4B | 22.0 (2) | C2A—C3A—C4A—C5A | −0.7 (2) |
O31B—N3B—C3B—C4B | −156.99 (15) | N3A—C3A—C4A—C5A | 179.43 (14) |
O52A—N5A—C5A—C6A | 11.0 (2) | N3B—C3B—C4B—C5B | 177.46 (13) |
O51A—N5A—C5A—C6A | −169.81 (15) | C2B—C3B—C4B—C5B | −1.4 (2) |
O52A—N5A—C5A—C4A | −167.74 (15) | C3A—C4A—C5A—C6A | 0.5 (2) |
O51A—N5A—C5A—C4A | 11.5 (2) | C3A—C4A—C5A—N5A | 179.18 (14) |
O52B—N5B—C5B—C6B | −17.5 (2) | C3B—C4B—C5B—N5B | −179.44 (13) |
O51B—N5B—C5B—C6B | 162.42 (15) | C3B—C4B—C5B—C6B | 1.1 (2) |
O51B—N5B—C5B—C4B | −17.0 (2) | N5A—C5A—C6A—C1A | −178.28 (14) |
O52B—N5B—C5B—C4B | 163.06 (15) | C4A—C5A—C6A—C1A | 0.4 (2) |
C6A—C1A—C11A—O12A | −176.77 (15) | N5B—C5B—C6B—C1B | −179.11 (14) |
C2A—C1A—C11A—O11A | −178.01 (14) | C4B—C5B—C6B—C1B | 0.3 (2) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+1; (iii) x+1, y, z; (iv) −x+1, −y, −z+1; (v) x−1, y, z; (vi) −x+2, −y, −z+1; (vii) x, y, z+1; (viii) x, y, z−1; (ix) −x+1, −y+1, −z+2; (x) x−1, y, z+1; (xi) −x+2, −y, −z; (xii) −x+2, −y+1, −z; (xiii) x+1, y, z−1; (xiv) −x+1, −y, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H11W···O8W | 0.91 | 1.79 | 2.700 (2) | 179 |
O1W—H12W···O6Wii | 0.88 | 1.93 | 2.7934 (19) | 170 |
O2W—H21W···O12A | 0.76 | 2.11 | 2.8001 (18) | 152 |
O2W—H22W···O6W | 0.87 | 1.87 | 2.7375 (18) | 178 |
O3W—H31W···O7W | 0.80 | 2.02 | 2.8213 (19) | 170 |
O3W—H32W···O5Wiii | 0.90 | 1.89 | 2.7722 (18) | 170 |
O4W—H41W···O12B | 0.80 | 2.00 | 2.7310 (18) | 151 |
O4W—H42W···O5Wiv | 0.83 | 1.97 | 2.7986 (18) | 174 |
O5W—H51W···O7Wiv | 0.86 | 2.11 | 2.9449 (19) | 164 |
O5W—H52W···O1W | 0.86 | 2.17 | 2.9702 (19) | 155 |
O5W—H52W···O4W | 0.86 | 2.53 | 3.1235 (19) | 127 |
O6W—H61W···O12Aii | 0.86 | 2.00 | 2.8404 (19) | 163 |
O6W—H62W···O3Wi | 0.86 | 2.14 | 2.9522 (19) | 159 |
O7W—H71W···O12Bvi | 0.89 | 1.87 | 2.708 (2) | 158 |
O7W—H72W···O32Bvii | 0.86 | 2.50 | 3.236 (2) | 145 |
O8W—H81W···O12Aii | 0.90 | 1.99 | 2.7737 (19) | 145 |
O8W—H82W···O32Aviii | 0.89 | 2.54 | 3.094 (2) | 122 |
O8W—H82W···O52Aiv | 0.89 | 2.45 | 2.968 (2) | 117 |
C4A—H4A···O51Axiv | 0.93 | 2.51 | 3.416 (2) | 166 |
C4B—H4B···O31Axiii | 0.93 | 2.59 | 3.348 (2) | 139 |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+1; (iii) x+1, y, z; (iv) −x+1, −y, −z+1; (vi) −x+2, −y, −z+1; (vii) x, y, z+1; (viii) x, y, z−1; (xiii) x+1, y, z−1; (xiv) −x+1, −y, −z+2. |
Experimental details
Crystal data | |
Chemical formula | [Mg(C7H3N2O6)2(H2O)4]·4H2O |
Mr | 590.67 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 200 |
a, b, c (Å) | 7.1748 (3), 11.7299 (6), 15.0103 (7) |
α, β, γ (°) | 103.224 (4), 98.569 (4), 92.181 (4) |
V (Å3) | 1212.62 (10) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.18 |
Crystal size (mm) | 0.32 × 0.22 × 0.10 |
Data collection | |
Diffractometer | Oxford Diffraction Gemini-S CCD-detector diffractometer |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2012) |
Tmin, Tmax | 0.970, 0.980 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15059, 4764, 3969 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.095, 0.94 |
No. of reflections | 4764 |
No. of parameters | 352 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.29, −0.20 |
Computer programs: CrysAlis PRO (Agilent, 2012), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 2012), PLATON (Spek, 2009).
Mg1—O1W | 2.0929 (14) | Mg1—O4W | 2.0804 (13) |
Mg1—O2W | 2.0732 (13) | Mg1—O11A | 2.0304 (13) |
Mg1—O3W | 2.1024 (14) | Mg1—O11B | 2.0237 (13) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H11W···O8W | 0.91 | 1.79 | 2.700 (2) | 179 |
O1W—H12W···O6Wi | 0.88 | 1.93 | 2.7934 (19) | 170 |
O2W—H21W···O12A | 0.76 | 2.11 | 2.8001 (18) | 152 |
O2W—H22W···O6W | 0.87 | 1.87 | 2.7375 (18) | 178 |
O3W—H31W···O7W | 0.80 | 2.02 | 2.8213 (19) | 170 |
O3W—H32W···O5Wii | 0.90 | 1.89 | 2.7722 (18) | 170 |
O4W—H41W···O12B | 0.80 | 2.00 | 2.7310 (18) | 151 |
O4W—H42W···O5Wiii | 0.83 | 1.97 | 2.7986 (18) | 174 |
O5W—H51W···O7Wiii | 0.86 | 2.11 | 2.9449 (19) | 164 |
O5W—H52W···O1W | 0.86 | 2.17 | 2.9702 (19) | 155 |
O6W—H61W···O12Ai | 0.86 | 2.00 | 2.8404 (19) | 163 |
O6W—H62W···O3Wiv | 0.86 | 2.14 | 2.9522 (19) | 159 |
O7W—H71W···O12Bv | 0.89 | 1.87 | 2.708 (2) | 158 |
O7W—H72W···O32Bvi | 0.86 | 2.50 | 3.236 (2) | 145 |
O8W—H81W···O12Ai | 0.90 | 1.99 | 2.7737 (19) | 145 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x+1, y, z; (iii) −x+1, −y, −z+1; (iv) −x+2, −y+1, −z+1; (v) −x+2, −y, −z+1; (vi) x, y, z+1. |
Magnesium complexes involving monoanionic nitro-substituted benzoate ligands (L) show both the common [Mg(H2O)6]2+ 2(L) form, e.g. a dihydrate: L = 4-nitrobenzoate (Srinivasan et al., 2007; Arlin et al., 2011), as well as examples in which the ligand is coordinated, e.g. [MgL(H2O)5] (L). HL. H2O (a complex acid adduct: L = 4-nitro-3-hydroxybenzoate) (Morgant et al., 2006) and [MgL2(H2O)4]: (L = 2-nitrobenzoate) (Srinivasan et al., 2011; Arlin et al., 2011). All known examples are monomeric and have essentially octahedral metal stereochemistry.
The title complex, [Mg(C7H3N2O6)2(H2O)4]. 4H2O was obtained from the reaction of 3,5-dinitrobenzoic acid acid with MgCO3 in aqueous ethanol and the structure is reported here. In this structure (Fig. 1), the slightly distorted octahedral MgO6 coordination polyhedron comprises two trans-related carboxyl O-atom donors from mononodentate 3,5-dinitrobenzoate ligands, and four water molecules [bond range Mg—O, 2.0237 (13)–2.1024 (14) Å (Table 1)]. The coordinated water molecules and the four water molecules of solvation give both intra- and inter-unit O—H···O hydrogen-bonding interactions with carboxyl, water and nitro O-atom acceptors (Table 2), giving a three-dimensional structure (Fig. 2).
In the present complex, the two 3,5-dinitrobenzoate ligands are conformationally similar, with the carboxyl groups lying essentially in the plane of the benzene ring [torsion angles C2—C1—C11—O11 = 178.01 (14)° (A) and 178.90 (14)° (B)]. The C5 nitro groups are variously rotated out of the benzene plane [torsion angles C2—C3—N3—O32 = 154.31 (17)° (A) and 159.03 (15)° (B): C4—C5—N5—O52 = 167.74 (15)° (A) and 163.06 (15)° (B)].