A co-crystal of nona­hydrated disodium(II) with mixed anions from m-chloro­benzoic acid and furosemide

In the title compound, [Na₂(H₂O)₉](C₇H₄ClO₂)(C₁₂H₁₀ClN₂O₅S) {systematic name: catena-poly[[[triaquasodium(I)]-di-[mu]-aqua-[triaquasodium(I)]-[mu]-aqua] 3-chlorobenzoate 4-chloro-2-[(furan-2-ylmethyl)amino]-5-sulfamoylbenzoate]}, both the original m-chloro­benzoic acid and furosemide exist with deprotonated carboxyl­ates, and the sodium cations and water mol­ecules exist in chains with stoichiometry [Na₂(OH₂)₉]²⁺ that propagate in the [-110] direction. Each of the two independent Na⁺ ions is coordinated by three monodentate water mol­ecules, two double-water bridges, and one single-water bridge. There is considerable cross-linking between the [Na₂(OH₂)₉]²⁺ chains and to furosemide sulfonamide and carboxyl­ate by inter­molecular O-H...O hydrogen bonds. All hydrogen-bond donors participate in a complex two-dimensional array parallel to the ab plane. The furosemide NH group donates an intra­molecular hydrogen bond to the carboxyl­ate group, and the furosemide NH₂ group donates an intra­molecular hydrogen bond to the Cl atom and an inter­molecular one to the m-chloro­benzoate O atom. The plethora of hydrogen-bond donors on the cation/water chain leads to many large rings, up to graph set R₄⁴(24), involving two chains and two furosemide anions. The chloro­benzoate is involved in only one R₂²(8) ring, with two water mol­ecules cis-coordinated to Na. The furan O atom is not hydrogen bonded.

Key indicators

• Single-crystal X-ray study
• T = 100 K
• Mean [sigma](C-C) = 0.002 Å
• R factor = 0.043
• wR factor = 0.107
• Data-to-parameter ratio = 23.2

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd.  #          1 Note
              H18 Na2 O9
PLAT906_ALERT_3_C Large K value in the Analysis of Variance ......      8.747 Check
PLAT910_ALERT_3_C Missing # of FCF Reflection(s) Below Th(Min) ...          5 Report
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.600         66 Report
PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF ....          2 Note

Alert level G
PLAT002_ALERT_2_G Number of Distance or Angle Restraints on AtSite         24 Note
PLAT004_ALERT_5_G Polymeric Structure Found with Maximum Dimension          1 Info
PLAT042_ALERT_1_G Calc. and Reported MoietyFormula Strings  Differ     Please Check
PLAT066_ALERT_1_G Predicted and Reported Tmin&Tmax Range Identical          ? Check
PLAT154_ALERT_1_G The su's on the Cell Angles are Equal ..........    0.02000 Degree
PLAT176_ALERT_4_G The CIF-Embedded .res File Contains SADI Records          1 Report
PLAT860_ALERT_3_G Number of Least-Squares Restraints .............        120 Note
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L=  0.600        434 Note

   0 ALERT level A = Most likely a serious problem - resolve or explain
   0 ALERT level B = A potentially serious problem, consider carefully
   5 ALERT level C = Check. Ensure it is not caused by an omission or oversight
   8 ALERT level G = General information/check it is not something unexpected

   3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   5 ALERT type 3 Indicator that the structure quality may be low
   3 ALERT type 4 Improvement, methodology, query or suggestion
   1 ALERT type 5 Informative message, check

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S1. Chemical context

Furosemide is a widely used diuretic for the treatment of hypertension and edema (Krumlovsky & del Greco, 1976; Musini et al., 2015), and to a lesser extent, hypercalcemia (Belen et al., 2014; Carvalhana et al. (2006)). This furan-containing compound is of inter­est; however, the toxicity elicited by these core compounds is not well understood. The free furan itself is a known hepato-carcinogen and toxicant, as studied in rats (Gill et al., 2010) and mice (Terrell et al., 2014). The epoxide metabolite of furans, formed in CYP450-mediated oxidations, can isomerize to highly reactive electrophilic inter­mediates such as cis-2-butene-1,4-dial (Chen et al., 1995; Peterson 2015; Vargas et al., 1998).

We have performed the oxidation of furosemide with m-chloro­perbenzoic acid (m-CPBA), and isolated various epoxide and isomerized products in support of our efforts to understand this type of toxicity mechanism, and to also identify potential biomarkers for furosemide in humans. During the separation and drying of the products of the furosemide–m-CPBA reaction, we observed the formation of crystals in the mother liquor (the organic layer). Analysis of these crystals by X-ray crystallography revealed a nonahydrate co-crystal of furosemide (starting material) with that of m-chloro­benzoic acid (an inadvertent contaminant or the reduced product of m-CPBA). Analogous to the known properties of co-crystals of furosemide with nicotinamide and their pharmaceutical importance (Aitipamula et al., 2012; Chadha et al., 2012; Goud et al., 2012; Stepanovs & Mishnev, 2012; Ueto et al., 2012), we believe that the co-crystals of furosemide with m-chloro­benzoic acid could have useful applications in drug development and may lead to formulations with improved potency, solubility, and stability. Therefore, this serendipitous finding may have important applications for improving furosemide bioavailability.

S2. Structural commentary

The asymmetric unit is illustrated in Fig. 1. The furosemide moiety is present as the monoanion, with the COOH group deprotonated, N2 as NH and the primary amine nitro­gen N1 as NH₂. The m-chloro­benzoate moiety is also deprotonated. Balancing the charge of the two types of anions are two independent sodium cations, both of which are hexacoordinate, with Na···O(water) distances in the range 2.3558 (13)–2.4500 (13) Å. Each Na⁺ cation is coordinated by three monodentate water molecules, two double-water bridge molecules, and one single-water bridge molecules, as shown in Fig. 2. Thus, centrosymmetric Na₂(OH₂)₈ units are linked by single water bridges, forming chains in the [110] direction.

S3. Supra­molecular features

Hydrogen bonding is extensive (Table 1), with all 21 hydrogen-bond donors involved. Notable features of the two-dimensional hydrogen-bonding pattern (Etter et al.. 1990) are sulfonamide N—H···O bonds to m-chloro­benzoate, secondary amine N—H···O hydrogen bonds to furosemide carboxyl­ate, and water O—H···O hydrogen bonds to sulfonamide O, to both types of carboxyl­ates, and to other water molecules. The direction of the normal to the hydrogen-bonding network is [001]. The furan oxygen atom O5 is not involved in the hydrogen bonding.

S4. Synthesis and crystallization

Furosemide (8.2 mmol; 2.71 g), dissolved in 3 ml of di­chloro­methane (DCM), was added dropwise over 5 min to a solution of 8.2 mmol of m-CPBA (1.84 g) and 10.5 mmol NaHCO₃ (0.88 g) in 20 ml of DCM on ice with rapid stirring (Fig. 3). After 2 h, an additional 4 mmol of m-CPBA in 10 ml of DCM was added to the reaction mixture. Upon removal from the ice bath, 4 ml of aqueous sodium sulfite solution (10%) was added with stirring for an additional 15 min. After partitioning the layers with deionized water (resistance ~18.2 M Ω cm^-1), the organic layer was collected and the aqueous layer was extracted with another 10 ml of DCM. The combined mixture of the organic layer was washed with 10 ml of aqueous solution of NaHCO₃ (5%, w/v), dried over anhydrous Na₂SO₄, and then subjected to partial evaporation under low pressure (ca 4 psi) at 308 K. The partially evaporated sample was left at ambient pressure and temperature overnight. Crystals were formed with slow evaporation.

S5. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. H atoms on C were idealized with C—H distances of 0.95 Å for sp² C and 0.99 Å for CH₂. Those on N and O were assigned from difference maps, and their positions refined, with O—H distances restrained to be equal. U_iso(H) were assigned as 1.2 times U_eq of the attached atoms (1.5 for water). Six reflections with Fo<<Fc were omitted from the calculations.

Related literature

For the origins and functions of furosemide, see: Belen et al. (2014); Carvalhana et al. (2006); Musini et al.. (2015); Krumlovsky & del Greco (1976); Vargas et al. (1998). For related structural studies, see: Aitipamula et al. (2012); Chadha et al. (2012); Goud et al. (2012); Stepanovs & Mishnev (2012); Ueto et al. (2012). For information supporting the reported structure and analogs, see: Chen et al. (1995); Gill et al. (2010); Peterson et al. (2015); Terrell et al. (2014). For graph sets of hydrogen bonding, see: Etter et al. (1990).

Computing details

Data collection: COLLECT (Nonius, 1999); cell refinement: HKL SCALEPACK (Otwinowski & Minor 1997); data reduction: HKL DENZO and SCALEPACK (Otwinowski & Minor 1997); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures

	Fig. 1. The asymmetric unit with 50% ellipsoids.
	Fig. 2. A portion of the Na–water chain, showing the centrosymmetric Na2(OH2)2 bridges and the single water bridges.
	Fig. 3. Proposed scheme of reactions of furosemide with m-chloroperoxybenzoic acid.
	Fig. 4. A supramolecular layer of the title compound in the ab plane.

catena-Poly[[[triaquasodium(I)]-di-µ-aqua-[triaquasodium(I)]-µ-aqua] 3-chlorobenzoate 4-chloro-2-[(furan-2-ylmethyl)amino]-5-sulfamoylbenzoate]

Crystal data

[Na2(OH2)9](C7H4ClO2)(C12H10ClN2O5S)	Z = 2
Mr = 693.41	F(000) = 720
Triclinic, P1	Dx = 1.519 Mg m^−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 7.908 (2) Å	Cell parameters from 17752 reflections
b = 10.224 (3) Å	θ = 2.5–32.6°
c = 19.631 (4) Å	µ = 0.39 mm^−1
α = 85.46 (2)°	T = 100 K
β = 81.80 (2)°	Lath fragment, colorless
γ = 74.96 (2)°	0.30 × 0.25 × 0.07 mm
V = 1515.7 (7) Å^3

Data collection

Nonius KappaCCD diffractometer	10267 independent reflections
Radiation source: fine-focus sealed tube	7760 reflections with I > 2s(I)
Graphite monochromator	Rint = 0.035
ω and φ scans	θmax = 32.3°, θmin = 2.7°
Absorption correction: multi-scan (SCALEPACK; Otwinowski & Minor, 1997)	h = −11→11
Tmin = 0.893, Tmax = 0.974	k = −13→15
17752 measured reflections	l = −29→29

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.043	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.107	H atoms treated by a mixture of independent and constrained refinement
S = 1.05	w = 1/[σ^2(Fo^2) + (0.058P)^2] where P = (Fo^2 + 2Fc^2)/3
10267 reflections	(Δ/σ)max = 0.001
442 parameters	Δρmax = 0.47 e Å^−3
120 restraints	Δρmin = −0.55 e Å^−3

Special details

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
Cl1	0.62548 (4)	0.49926 (3)	0.089838 (16)	0.01988 (8)
S1	0.53103 (4)	0.56412 (3)	0.252718 (16)	0.01360 (7)
O1	0.49898 (12)	0.54858 (10)	0.32676 (5)	0.01772 (19)
O2	0.61708 (13)	0.66762 (9)	0.22345 (5)	0.0186 (2)
O3	0.86565 (12)	0.10830 (9)	0.36913 (5)	0.01511 (18)
O4	0.95416 (13)	−0.04844 (9)	0.29000 (5)	0.01778 (19)
O5	0.92982 (13)	−0.22550 (10)	0.12326 (6)	0.0250 (2)
N1	0.34022 (15)	0.59988 (12)	0.22586 (6)	0.0171 (2)
H11N	0.345 (2)	0.6226 (18)	0.1837 (10)	0.021*
H12N	0.282 (2)	0.5394 (18)	0.2404 (9)	0.021*
N2	0.97465 (16)	0.03032 (12)	0.15946 (6)	0.0191 (2)
H2N	1.009 (2)	−0.0258 (18)	0.1927 (9)	0.023*
C1	0.65991 (16)	0.40639 (13)	0.22332 (6)	0.0133 (2)
C2	0.70427 (17)	0.37919 (13)	0.15334 (7)	0.0149 (2)
C3	0.81105 (18)	0.25674 (13)	0.13183 (7)	0.0165 (2)
H3	0.8422	0.2422	0.0840	0.020*
C4	0.87486 (17)	0.15226 (13)	0.18053 (7)	0.0147 (2)
C5	0.83234 (16)	0.17957 (12)	0.25209 (6)	0.0128 (2)
C6	0.72692 (16)	0.30566 (13)	0.27139 (7)	0.0131 (2)
H6	0.6996	0.3237	0.3190	0.016*
C7	0.88889 (16)	0.07359 (13)	0.30778 (7)	0.0133 (2)
C8	1.0003 (2)	−0.01178 (14)	0.08920 (7)	0.0215 (3)
H8A	1.0944	0.0249	0.0619	0.026*
H8B	0.8900	0.0247	0.0682	0.026*
C9	1.05072 (18)	−0.16262 (14)	0.08795 (7)	0.0179 (3)
C10	1.19245 (19)	−0.25494 (14)	0.05907 (7)	0.0193 (3)
H10	1.2949	−0.2372	0.0325	0.023*
C11	1.1573 (2)	−0.38525 (14)	0.07659 (7)	0.0211 (3)
H11	1.2312	−0.4709	0.0634	0.025*
C12	0.9991 (2)	−0.36173 (15)	0.11544 (9)	0.0252 (3)
H12	0.9430	−0.4302	0.1348	0.030*
Cl2	0.28737 (6)	0.23829 (4)	0.026181 (19)	0.02904 (9)
O6	0.15314 (12)	0.41020 (9)	0.27976 (5)	0.01757 (19)
O7	0.25838 (13)	0.23500 (10)	0.35073 (5)	0.01731 (19)
C13	0.31680 (17)	0.20440 (13)	0.22941 (7)	0.0147 (2)
C14	0.27177 (18)	0.25472 (13)	0.16425 (7)	0.0162 (2)
H14	0.1917	0.3408	0.1589	0.019*
C15	0.34577 (19)	0.17705 (14)	0.10766 (7)	0.0191 (3)
C16	0.4648 (2)	0.05117 (14)	0.11350 (8)	0.0230 (3)
H16	0.5148	−0.0002	0.0740	0.028*
C17	0.5091 (2)	0.00209 (15)	0.17849 (8)	0.0243 (3)
H17	0.5903	−0.0836	0.1836	0.029*
C18	0.43507 (18)	0.07803 (14)	0.23614 (7)	0.0198 (3)
H18	0.4654	0.0434	0.2804	0.024*
C19	0.23698 (16)	0.28915 (13)	0.29148 (7)	0.0140 (2)
Na1	0.01996 (6)	0.65083 (5)	0.45870 (3)	0.01372 (11)
Na2	−0.44798 (7)	0.87445 (5)	0.44265 (3)	0.01394 (11)
O8	−0.15551 (12)	0.88218 (10)	0.46379 (5)	0.01546 (18)
H81	−0.126 (2)	0.9400 (19)	0.4362 (10)	0.023*
H82	−0.175 (2)	0.9155 (18)	0.5017 (10)	0.023*
O9	0.19980 (12)	0.42119 (10)	0.45986 (5)	0.01525 (18)
H91	0.295 (2)	0.4001 (18)	0.4793 (9)	0.023*
H92	0.217 (2)	0.3797 (19)	0.4253 (10)	0.023*
O10	0.18912 (12)	0.66647 (10)	0.54828 (5)	0.01560 (18)
H101	0.169 (2)	0.6053 (19)	0.5718 (10)	0.023*
H102	0.158 (2)	0.7401 (18)	0.5767 (9)	0.023*
O11	−0.10007 (13)	0.54861 (10)	0.37594 (5)	0.01550 (18)
H111	−0.026 (2)	0.5051 (18)	0.3452 (10)	0.023*
H112	−0.161 (2)	0.6123 (19)	0.3560 (9)	0.023*
O12	−0.30234 (14)	0.80747 (10)	0.33026 (5)	0.0182 (2)
H121	−0.221 (2)	0.8455 (19)	0.3142 (10)	0.027*
H122	−0.329 (2)	0.7843 (19)	0.2985 (10)	0.027*
O13	−0.47562 (13)	1.11930 (10)	0.43409 (5)	0.01560 (18)
H131	−0.543 (2)	1.1568 (19)	0.4070 (10)	0.023*
H132	−0.380 (2)	1.1303 (18)	0.4114 (10)	0.023*
O14	0.16422 (13)	0.76011 (10)	0.36697 (5)	0.01745 (19)
H141	0.108 (3)	0.802 (2)	0.3408 (10)	0.026*
H142	0.236 (3)	0.713 (2)	0.3462 (10)	0.026*
O15	−0.73738 (13)	0.97411 (10)	0.41518 (5)	0.01661 (19)
H151	−0.770 (2)	0.9090 (19)	0.4010 (9)	0.025*
H152	−0.753 (2)	1.0342 (19)	0.3861 (10)	0.025*
O16	−0.49332 (13)	0.65364 (10)	0.46360 (5)	0.01549 (18)
H161	−0.582 (2)	0.6532 (18)	0.4885 (10)	0.023*
H162	−0.494 (2)	0.6123 (18)	0.4305 (10)	0.023*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Cl1	0.02539 (17)	0.01556 (15)	0.01459 (14)	0.00207 (12)	−0.00343 (12)	0.00125 (11)
S1	0.01423 (14)	0.01061 (14)	0.01548 (15)	−0.00184 (11)	−0.00167 (11)	−0.00254 (11)
O1	0.0191 (5)	0.0175 (5)	0.0155 (4)	−0.0020 (4)	−0.0016 (4)	−0.0041 (4)
O2	0.0209 (5)	0.0136 (4)	0.0221 (5)	−0.0062 (4)	−0.0016 (4)	−0.0022 (4)
O3	0.0167 (4)	0.0147 (4)	0.0138 (4)	−0.0036 (4)	−0.0024 (3)	−0.0002 (3)
O4	0.0240 (5)	0.0108 (4)	0.0176 (5)	−0.0022 (4)	−0.0036 (4)	−0.0001 (3)
O5	0.0199 (5)	0.0182 (5)	0.0335 (6)	−0.0016 (4)	0.0032 (4)	−0.0038 (4)
N1	0.0153 (5)	0.0159 (5)	0.0194 (6)	−0.0022 (4)	−0.0036 (4)	0.0003 (4)
N2	0.0276 (6)	0.0118 (5)	0.0141 (5)	0.0027 (5)	−0.0032 (5)	−0.0016 (4)
C1	0.0137 (5)	0.0117 (6)	0.0144 (6)	−0.0022 (4)	−0.0020 (4)	−0.0027 (4)
C2	0.0170 (6)	0.0129 (6)	0.0146 (6)	−0.0027 (5)	−0.0039 (5)	0.0015 (4)
C3	0.0207 (6)	0.0137 (6)	0.0134 (6)	−0.0014 (5)	−0.0019 (5)	−0.0013 (4)
C4	0.0158 (6)	0.0120 (6)	0.0155 (6)	−0.0018 (5)	−0.0019 (5)	−0.0021 (4)
C5	0.0138 (5)	0.0108 (5)	0.0141 (6)	−0.0035 (5)	−0.0022 (4)	−0.0006 (4)
C6	0.0129 (5)	0.0128 (6)	0.0147 (6)	−0.0044 (5)	−0.0023 (4)	−0.0019 (4)
C7	0.0118 (5)	0.0137 (6)	0.0155 (6)	−0.0050 (5)	−0.0019 (4)	0.0002 (4)
C8	0.0317 (8)	0.0147 (6)	0.0144 (6)	0.0003 (6)	−0.0010 (5)	−0.0025 (5)
C9	0.0205 (6)	0.0153 (6)	0.0169 (6)	−0.0024 (5)	−0.0022 (5)	−0.0028 (5)
C10	0.0205 (6)	0.0173 (6)	0.0179 (6)	−0.0011 (5)	−0.0019 (5)	−0.0015 (5)
C11	0.0266 (7)	0.0137 (6)	0.0210 (7)	0.0011 (5)	−0.0064 (5)	−0.0033 (5)
C12	0.0252 (7)	0.0158 (7)	0.0351 (8)	−0.0059 (6)	−0.0027 (6)	−0.0037 (6)
Cl2	0.0479 (2)	0.02199 (18)	0.01606 (16)	−0.00506 (16)	−0.00745 (15)	−0.00001 (13)
O6	0.0176 (4)	0.0127 (4)	0.0196 (5)	0.0003 (4)	−0.0008 (4)	−0.0010 (4)
O7	0.0203 (5)	0.0165 (5)	0.0149 (4)	−0.0031 (4)	−0.0048 (4)	−0.0003 (3)
C13	0.0144 (6)	0.0130 (6)	0.0168 (6)	−0.0029 (5)	−0.0032 (5)	−0.0016 (4)
C14	0.0187 (6)	0.0114 (6)	0.0182 (6)	−0.0026 (5)	−0.0038 (5)	0.0002 (5)
C15	0.0268 (7)	0.0167 (6)	0.0146 (6)	−0.0067 (5)	−0.0036 (5)	0.0006 (5)
C16	0.0299 (7)	0.0166 (7)	0.0204 (7)	−0.0033 (6)	0.0017 (6)	−0.0047 (5)
C17	0.0282 (7)	0.0137 (6)	0.0257 (7)	0.0036 (6)	−0.0017 (6)	−0.0020 (5)
C18	0.0217 (7)	0.0156 (6)	0.0192 (6)	0.0000 (5)	−0.0031 (5)	0.0012 (5)
C19	0.0119 (5)	0.0137 (6)	0.0170 (6)	−0.0037 (5)	−0.0039 (4)	−0.0002 (4)
Na1	0.0119 (2)	0.0117 (2)	0.0173 (3)	−0.00179 (19)	−0.00343 (19)	−0.00038 (19)
Na2	0.0129 (2)	0.0116 (2)	0.0173 (3)	−0.00220 (19)	−0.00328 (19)	−0.00089 (19)
O8	0.0164 (4)	0.0126 (4)	0.0164 (5)	−0.0017 (4)	−0.0026 (4)	−0.0003 (4)
O9	0.0129 (4)	0.0153 (4)	0.0168 (5)	−0.0006 (4)	−0.0040 (4)	−0.0025 (3)
O10	0.0168 (4)	0.0128 (4)	0.0182 (5)	−0.0054 (4)	−0.0022 (4)	−0.0011 (4)
O11	0.0138 (4)	0.0139 (4)	0.0173 (5)	−0.0006 (4)	−0.0022 (4)	−0.0006 (4)
O12	0.0196 (5)	0.0178 (5)	0.0187 (5)	−0.0063 (4)	−0.0044 (4)	−0.0014 (4)
O13	0.0127 (4)	0.0158 (5)	0.0181 (5)	−0.0030 (4)	−0.0036 (4)	0.0012 (4)
O14	0.0142 (5)	0.0155 (5)	0.0207 (5)	−0.0006 (4)	−0.0008 (4)	−0.0025 (4)
O15	0.0168 (5)	0.0142 (5)	0.0205 (5)	−0.0047 (4)	−0.0065 (4)	−0.0005 (4)
O16	0.0138 (4)	0.0150 (5)	0.0184 (5)	−0.0041 (4)	−0.0020 (4)	−0.0031 (4)

Geometric parameters (Å, º)

Cl1—C2	1.7411 (14)	C14—H14	0.9500
S1—O2	1.4418 (10)	C15—C16	1.391 (2)
S1—O1	1.4427 (10)	C16—C17	1.392 (2)
S1—N1	1.6120 (13)	C16—H16	0.9500
S1—C1	1.7604 (14)	C17—C18	1.393 (2)
O3—C7	1.2572 (16)	C17—H17	0.9500
O4—C7	1.2761 (16)	C18—H18	0.9500
O5—C9	1.3664 (17)	Na1—O14	2.3558 (13)
O5—C12	1.3703 (18)	Na1—O10	2.3946 (12)
N1—H11N	0.839 (18)	Na1—O9^i	2.4090 (12)
N1—H12N	0.872 (18)	Na1—O9	2.4091 (13)
N2—C4	1.3512 (17)	Na1—O8	2.4134 (13)
N2—C8	1.4483 (18)	Na1—O11	2.4200 (12)
N2—H2N	0.860 (18)	Na2—O15	2.3709 (13)
C1—C6	1.3919 (18)	Na2—O16	2.3718 (13)
C1—C2	1.4001 (18)	Na2—O12	2.4016 (13)
C2—C3	1.3755 (19)	Na2—O13^ii	2.4108 (12)
C3—C4	1.4163 (18)	Na2—O8	2.4294 (12)
C3—H3	0.9500	Na2—O13	2.4500 (13)
C4—C5	1.4295 (18)	O8—H81	0.83 (2)
C5—C6	1.3892 (18)	O8—H82	0.821 (19)
C5—C7	1.5066 (18)	O9—Na1^i	2.4090 (12)
C6—H6	0.9500	O9—H91	0.862 (19)
C8—C9	1.4907 (19)	O9—H92	0.806 (19)
C8—H8A	0.9900	O10—H101	0.784 (19)
C8—H8B	0.9900	O10—H102	0.932 (18)
C9—C10	1.3501 (19)	O11—H111	0.842 (19)
C10—C11	1.436 (2)	O11—H112	0.811 (19)
C10—H10	0.9500	O12—H121	0.848 (19)
C11—C12	1.344 (2)	O12—H122	0.76 (2)
C11—H11	0.9500	O13—Na2^ii	2.4108 (12)
C12—H12	0.9500	O13—H131	0.807 (19)
Cl2—C15	1.7510 (15)	O13—H132	0.848 (19)
O6—C19	1.2637 (16)	O14—H141	0.76 (2)
O7—C19	1.2623 (16)	O14—H142	0.74 (2)
C13—C18	1.3938 (19)	O15—H151	0.853 (19)
C13—C14	1.3995 (18)	O15—H152	0.803 (19)
C13—C19	1.5158 (19)	O16—H161	0.798 (19)
C14—C15	1.3857 (19)	O16—H162	0.80 (2)
O2—S1—O1	118.19 (6)	O7—C19—O6	124.65 (13)
O2—S1—N1	106.89 (7)	O7—C19—C13	118.41 (12)
O1—S1—N1	106.20 (7)	O6—C19—C13	116.94 (12)
O2—S1—C1	108.39 (6)	O14—Na1—O10	99.71 (4)
O1—S1—C1	106.54 (6)	O14—Na1—O9^i	163.93 (4)
N1—S1—C1	110.57 (6)	O10—Na1—O9^i	91.71 (4)
C9—O5—C12	106.30 (11)	O14—Na1—O9	103.75 (5)
S1—N1—H11N	112.4 (11)	O10—Na1—O9	81.57 (4)
S1—N1—H12N	112.1 (11)	O9^i—Na1—O9	89.00 (4)
H11N—N1—H12N	116.8 (16)	O14—Na1—O8	77.59 (4)
C4—N2—C8	124.07 (12)	O10—Na1—O8	95.33 (4)
C4—N2—H2N	113.6 (12)	O9^i—Na1—O8	90.19 (4)
C8—N2—H2N	121.6 (12)	O9—Na1—O8	176.78 (4)
C6—C1—C2	118.22 (12)	O14—Na1—O11	89.24 (4)
C6—C1—S1	118.85 (10)	O10—Na1—O11	159.01 (4)
C2—C1—S1	122.88 (10)	O9^i—Na1—O11	83.87 (4)
C3—C2—C1	121.58 (12)	O9—Na1—O11	77.85 (4)
C3—C2—Cl1	117.22 (10)	O8—Na1—O11	105.17 (4)
C1—C2—Cl1	121.21 (10)	O15—Na2—O16	94.41 (4)
C2—C3—C4	120.46 (12)	O15—Na2—O12	99.60 (4)
C2—C3—H3	119.8	O16—Na2—O12	88.32 (4)
C4—C3—H3	119.8	O15—Na2—O13^ii	96.08 (4)
N2—C4—C3	120.49 (12)	O16—Na2—O13^ii	81.69 (4)
N2—C4—C5	121.12 (12)	O12—Na2—O13^ii	162.00 (4)
C3—C4—C5	118.38 (12)	O15—Na2—O8	153.51 (4)
C6—C5—C4	119.11 (12)	O16—Na2—O8	111.98 (4)
C6—C5—C7	118.49 (11)	O12—Na2—O8	83.99 (4)
C4—C5—C7	122.30 (11)	O13^ii—Na2—O8	85.91 (4)
C5—C6—C1	122.19 (12)	O15—Na2—O13	74.54 (4)
C5—C6—H6	118.9	O16—Na2—O13	166.06 (4)
C1—C6—H6	118.9	O12—Na2—O13	101.72 (4)
O3—C7—O4	123.35 (12)	O13^ii—Na2—O13	90.90 (4)
O3—C7—C5	119.00 (11)	O8—Na2—O13	79.02 (4)
O4—C7—C5	117.62 (11)	Na1—O8—Na2	105.44 (4)
N2—C8—C9	110.13 (12)	Na1—O8—H81	118.9 (13)
N2—C8—H8A	109.6	Na2—O8—H81	106.7 (12)
C9—C8—H8A	109.6	Na1—O8—H82	116.0 (13)
N2—C8—H8B	109.6	Na2—O8—H82	102.7 (12)
C9—C8—H8B	109.6	H81—O8—H82	105.7 (17)
H8A—C8—H8B	108.1	Na1^i—O9—Na1	91.00 (4)
C10—C9—O5	110.48 (12)	Na1^i—O9—H91	105.6 (12)
C10—C9—C8	134.27 (13)	Na1—O9—H91	120.6 (12)
O5—C9—C8	115.26 (12)	Na1^i—O9—H92	109.7 (13)
C9—C10—C11	106.27 (13)	Na1—O9—H92	118.4 (13)
C9—C10—H10	126.9	H91—O9—H92	108.7 (17)
C11—C10—H10	126.9	Na1—O10—H101	97.5 (13)
C12—C11—C10	106.22 (13)	Na1—O10—H102	122.0 (11)
C12—C11—H11	126.9	H101—O10—H102	105.4 (17)
C10—C11—H11	126.9	Na1—O11—H111	116.0 (11)
C11—C12—O5	110.72 (13)	Na1—O11—H112	104.5 (13)
C11—C12—H12	124.6	H111—O11—H112	105.9 (17)
O5—C12—H12	124.6	Na2—O12—H121	115.2 (13)
C18—C13—C14	119.61 (13)	Na2—O12—H122	135.5 (14)
C18—C13—C19	121.12 (12)	H121—O12—H122	103.8 (19)
C14—C13—C19	119.27 (12)	Na2^ii—O13—Na2	89.10 (4)
C15—C14—C13	119.01 (12)	Na2^ii—O13—H131	123.6 (13)
C15—C14—H14	120.5	Na2—O13—H131	111.3 (13)
C13—C14—H14	120.5	Na2^ii—O13—H132	126.5 (12)
C14—C15—C16	122.04 (13)	Na2—O13—H132	106.2 (12)
C14—C15—Cl2	119.23 (11)	H131—O13—H132	98.4 (17)
C16—C15—Cl2	118.73 (11)	Na1—O14—H141	117.4 (14)
C15—C16—C17	118.54 (14)	Na1—O14—H142	113.1 (15)
C15—C16—H16	120.7	H141—O14—H142	104 (2)
C17—C16—H16	120.7	Na2—O15—H151	104.6 (12)
C16—C17—C18	120.34 (13)	Na2—O15—H152	119.8 (13)
C16—C17—H17	119.8	H151—O15—H152	106.5 (18)
C18—C17—H17	119.8	Na2—O16—H161	112.4 (13)
C17—C18—C13	120.46 (13)	Na2—O16—H162	117.0 (13)
C17—C18—H18	119.8	H161—O16—H162	106.8 (18)
C13—C18—H18	119.8
O2—S1—C1—C6	119.77 (10)	C10—C11—C12—O5	0.73 (17)
O1—S1—C1—C6	−8.40 (12)	C9—O5—C12—C11	−0.22 (17)
N1—S1—C1—C6	−123.38 (11)	C18—C13—C14—C15	0.23 (19)
O2—S1—C1—C2	−57.59 (12)	C19—C13—C14—C15	179.71 (12)
O1—S1—C1—C2	174.23 (10)	C13—C14—C15—C16	−0.7 (2)
N1—S1—C1—C2	59.26 (13)	C13—C14—C15—Cl2	179.03 (10)
C6—C1—C2—C3	−0.01 (19)	C14—C15—C16—C17	0.5 (2)
S1—C1—C2—C3	177.37 (10)	Cl2—C15—C16—C17	−179.18 (12)
C6—C1—C2—Cl1	179.75 (10)	C15—C16—C17—C18	0.1 (2)
S1—C1—C2—Cl1	−2.87 (16)	C16—C17—C18—C13	−0.5 (2)
C1—C2—C3—C4	2.1 (2)	C14—C13—C18—C17	0.3 (2)
Cl1—C2—C3—C4	−177.66 (10)	C19—C13—C18—C17	−179.15 (13)
C8—N2—C4—C3	−10.5 (2)	C18—C13—C19—O7	−10.56 (19)
C8—N2—C4—C5	170.04 (13)	C14—C13—C19—O7	169.97 (11)
C2—C3—C4—N2	177.67 (12)	C18—C13—C19—O6	169.39 (12)
C2—C3—C4—C5	−2.87 (19)	C14—C13—C19—O6	−10.09 (18)
N2—C4—C5—C6	−178.95 (12)	O14—Na1—O8—Na2	117.64 (5)
C3—C4—C5—C6	1.59 (18)	O10—Na1—O8—Na2	−143.56 (4)
N2—C4—C5—C7	−2.64 (19)	O9^i—Na1—O8—Na2	−51.83 (5)
C3—C4—C5—C7	177.90 (11)	O11—Na1—O8—Na2	31.87 (5)
C4—C5—C6—C1	0.48 (19)	Na1^i—Na1—O8—Na2	−54.90 (7)
C7—C5—C6—C1	−175.97 (11)	O15—Na2—O8—Na1	−165.17 (8)
C2—C1—C6—C5	−1.29 (18)	O16—Na2—O8—Na1	20.07 (6)
S1—C1—C6—C5	−178.78 (10)	O12—Na2—O8—Na1	−65.67 (5)
C6—C5—C7—O3	−12.06 (17)	O13^ii—Na2—O8—Na1	99.40 (5)
C4—C5—C7—O3	171.61 (11)	O13—Na2—O8—Na1	−168.88 (5)
C6—C5—C7—O4	166.10 (11)	Na2^ii—Na2—O8—Na1	145.27 (4)
C4—C5—C7—O4	−10.23 (18)	O14—Na1—O9—Na1^i	−170.12 (4)
C4—N2—C8—C9	−156.88 (13)	O10—Na1—O9—Na1^i	91.87 (4)
C12—O5—C9—C10	−0.43 (16)	O9^i—Na1—O9—Na1^i	0.0
C12—O5—C9—C8	179.48 (12)	O11—Na1—O9—Na1^i	−83.94 (4)
N2—C8—C9—C10	−119.97 (17)	O15—Na2—O13—Na2^ii	96.06 (4)
N2—C8—C9—O5	60.15 (16)	O16—Na2—O13—Na2^ii	57.56 (17)
O5—C9—C10—C11	0.86 (16)	O12—Na2—O13—Na2^ii	−167.08 (4)
C8—C9—C10—C11	−179.02 (15)	O13^ii—Na2—O13—Na2^ii	0.0
C9—C10—C11—C12	−0.96 (16)	O8—Na2—O13—Na2^ii	−85.65 (4)

Symmetry codes: (i) −x, −y+1, −z+1; (ii) −x−1, −y+2, −z+1.

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
N1—H11N···Cl1	0.839 (18)	2.767 (17)	3.2848 (16)	121.6 (14)
N1—H12N···O6	0.872 (18)	1.920 (18)	2.7905 (17)	175.3 (17)
N2—H2N···O4	0.860 (18)	1.906 (18)	2.6199 (16)	139.4 (16)
O8—H81···O3^iii	0.83 (2)	2.07 (2)	2.8737 (16)	162 (2)
O8—H82···O15^ii	0.82 (2)	2.00 (2)	2.8025 (16)	168 (2)
O9—H91···O16^i	0.86 (2)	1.99 (2)	2.8499 (15)	172 (2)
O9—H92···O7	0.81 (2)	2.10 (2)	2.8867 (16)	167 (2)
O10—H101···O11^i	0.78 (2)	1.96 (2)	2.7444 (16)	174 (2)
O10—H102···O3^iv	0.93 (2)	1.90 (2)	2.8271 (15)	171 (2)
O11—H111···O6	0.84 (2)	1.89 (2)	2.7296 (16)	176 (2)
O11—H112···O12	0.81 (2)	2.08 (2)	2.8641 (16)	162 (2)
O12—H121···O4^iii	0.85 (2)	1.96 (2)	2.7962 (16)	171 (2)
O12—H122···O2^v	0.76 (2)	2.12 (2)	2.8593 (15)	165 (2)
O13—H131···O7^iii	0.81 (2)	2.01 (2)	2.8082 (15)	169 (2)
O13—H132···O3^iii	0.85 (2)	1.97 (2)	2.7939 (15)	165 (2)
O14—H141···O4^iii	0.76 (2)	1.99 (2)	2.7265 (16)	164 (2)
O14—H142···O1	0.74 (2)	2.31 (2)	3.0019 (17)	156 (2)
O15—H151···O14^v	0.85 (2)	1.92 (2)	2.7766 (16)	178 (2)
O15—H152···O7^iii	0.80 (2)	2.14 (2)	2.8545 (16)	149 (2)
O16—H161···O10^v	0.798 (19)	1.990 (19)	2.7857 (16)	175.7 (18)
O16—H162···O1^v	0.80 (2)	2.20 (2)	2.9852 (15)	165.8 (17)

Symmetry codes: (i) −x, −y+1, −z+1; (ii) −x−1, −y+2, −z+1; (iii) x−1, y+1, z; (iv) −x+1, −y+1, −z+1; (v) x−1, y, z.