organic compounds
Bis[(3-chlorobenzyl)ammonium] 2-phenylpropanedioate dihydrate
aDepartment of Chemistry, Faculty of Science, University of Ghana, Box LG56 Legon, Accra, Ghana, and bDepartment of Chemistry, Faculty of Science, Okayama University, Okayama 700-8530, Japan
*Correspondence e-mail: kadabohs@ug.edu.gh
In the 7H9ClN+·C9H6O42−·2H2O, there are two crystallographically independent cations, one dianion and two water molecules. The dihedral angle between the two carboxylate groups of the dianion is 78.1 (2)°. In the crystal, the components are held together by N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds, forming a layer parallel to the bc plane, with the hydrophilic and hydrophobic groups located in the inner and outer regions of the layers, respectively.
of the title compound, 2CExperimental
Crystal data
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Refinement
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Data collection: PROCESS-AUTO (Rigaku/MSC, 2004); cell PROCESS-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2004); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: CrystalStructure (Rigaku/MSC, 2004).
Supporting information
https://doi.org/10.1107/S1600536810029764/zl2291sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810029764/zl2291Isup2.hkl
Single crystals of the title compound were grown by slow evaporation of a water-ethanol solution (1:1 v/v; 20 ml) of 3-chlorobenzylamine (0.71 g, 5.0 mmol) and phenylmalonic acid (0.45 g, 0.25 mmol) at room temperature.
All H atoms were found in a difference Fourier map. Positional parameters of the water H atoms were refined, with Uiso(H) = 1.2Ueq(O). The NH3+ groups were refined as rigid groups (N—H = 0.91 Å), with Uiso(H) = 1.5Ueq(N), allowing for rotation around the C—N bonds. Other C-bound H atoms were refined as riding, with C—H = 0.95–1.00 Å, and with Uiso(H) = 1.2Ueq(C).
The title compound was investigated as part of a structural study on D—H···A hydrogen bonding (D = N, O or C; A = N or O) in carboxylic acid and pyridine systems (Ueda et al., 2005; Gotoh & Ishida, 2009).
The molecular structure of the compound and the crystal packing of the molecules viewed along the crystallographic b axis are shown in Figures 1 and 2, respectively. In its
the title compound has two crystallographically independent cations, one dianion and two water molecules. The two 3-chlorobenzylammonium cations have inverted but otherwise virtually indentical conformations as shown by the rotational angle of the ammonium group against the remainder of the molecule, N1-C16-C10-C11 = -119.04 (12)° and N2-C23-C17-C18 = 113.49 (12)° for the two groups (the two crystallographically independent ions are opposite enantiomers, but as as the structure is centrosymmetric both ions are present as racemic pairs throughout the structure).The C—O bond length in one of the carboxylates is slightly longer than in the other with the respective values of O1—C1 and O2—C1 being 1.2714 (14) and 1.2501 (14) Å. The O3—C3 and O4—C3 bond lengths in the other carboxylates are 1.2559 (14) and 1.2538 (14) Å, respectively, making the carbonyl distance in the latter indistinguishable from the single bond due to resonance. The slight difference in the two sets of carbonyl distances may be attributed to the number of H bonds their respective O atoms are involved in, as H bonds tend to stabilize negative charge at the O atoms. The three O atoms with only two strong H bonds have C-O distances below 1.6 Å, the one with three strong H bonds has a C-O distance larger than 1.7 Å.
The molecules associate by placement of all the phenyl rings in one direction, while the hydrophilic ammonium and the carboxylate ends are oriented towards the other end and are hydrogen bonded to water molecules, resulting in alternating hydrophobic and hydrophylic regions respectively in the crystal packing. In the hydrophilic regions the water molecules act as donors and acceptors in an extended hydrogen bonding network. Each water molecule serves as a bridge that links a 3-chlorobenzylammonium moiety and a phenylmalonate group. This arrangement affords an interconnectivity of water and donor protons such that two of the ammonium H atoms are donated to the water O atoms in a short N—H···O contact of comparable length [N2—H2B···O5iii = 1.98Å and N2—H2C···O5i = 2.01Å; Table 1], while the water H atoms are donated to the carboxylate O atoms [O5—H5A···O1 = 1.931 (18), O5—H5B···O3i = 1.868 (17), O6—H6A···O1 = 2.060 (17) and O6—H6B···O3iv = 1.945 (17) Å; Table 1].
In the hydrophobic regions the chloro-substituted aromatic rings show some stacking of parallel-shifted aromatic rings with each other, but the shortest centroid to centroid distance is larger than 4.3 Å and the interplanar separation is with greater than 3.6 Å also rather long for an attractive π-π stacking interaction. In the absence of any other directional interactions in the hydrophobic section of the structure it thus can be assumed that the crystal packing in these layers is likely to be dominated by shape recognition via dispersion forces.
For related structures, see: Ueda et al. (2005); Gotoh & Ishida (2009).
Data collection: PROCESS-AUTO (Rigaku/MSC, 2004); cell
PROCESS-AUTO (Rigaku/MSC, 2004); data reduction: CrystalStructure (Rigaku/MSC, 2004); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: CrystalStructure (Rigaku/MSC, 2004).Fig. 1. ORTEP-3 (Farrugia, 1997) diagram of 3-chlorobenzylammonium phenylmalonate dihydrate, showing the atom-numbering scheme. Displacement ellipsoids for non-hydrogen atoms are plotted at 50% probability and hydrogen atoms are shown as small spheres of arbitrary radii. | |
Fig. 2. A part of the crystal packing of the crystal structure of 3-chlorobenzylammonium phenylmalonate dihydrate, viewed down the b axis showing a network of hydrogen bonds. Hydrogen bonds are shown by broken lines. Colour codes for residues: RED & BLACK = 3-chlorobenzylammonium; GREEN = phenylmalonate; BLUE & YELLOW = water molecules. |
2C7H9ClN+·C9H6O42−·2H2O | F(000) = 1048.00 |
Mr = 499.39 | Dx = 1.399 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71075 Å |
Hall symbol: -P 2ybc | Cell parameters from 19587 reflections |
a = 17.3487 (7) Å | θ = 3.2–27.5° |
b = 9.7903 (5) Å | µ = 0.32 mm−1 |
c = 14.3496 (6) Å | T = 93 K |
β = 103.3832 (12)° | Block, colorless |
V = 2371.07 (17) Å3 | 0.36 × 0.25 × 0.10 mm |
Z = 4 |
Rigaku R-AXIS RAPID-II diffractometer | 4801 reflections with I > 2σ(I) |
Detector resolution: 10.00 pixels mm-1 | Rint = 0.026 |
ω scans | θmax = 27.5°, θmin = 3.2° |
Absorption correction: multi-scan (ABSCOR; Higashi, 1995) | h = −22→22 |
Tmin = 0.809, Tmax = 0.969 | k = −12→12 |
22684 measured reflections | l = −17→18 |
5404 independent reflections |
Refinement on F2 | 312 parameters |
Least-squares matrix: full | H atoms treated by a mixture of independent and constrained refinement |
R[F2 > 2σ(F2)] = 0.030 | w = 1/[σ2(Fo2) + (0.045P)2 + 0.8144P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.080 | (Δ/σ)max = 0.001 |
S = 1.03 | Δρmax = 0.35 e Å−3 |
5404 reflections | Δρmin = −0.28 e Å−3 |
2C7H9ClN+·C9H6O42−·2H2O | V = 2371.07 (17) Å3 |
Mr = 499.39 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 17.3487 (7) Å | µ = 0.32 mm−1 |
b = 9.7903 (5) Å | T = 93 K |
c = 14.3496 (6) Å | 0.36 × 0.25 × 0.10 mm |
β = 103.3832 (12)° |
Rigaku R-AXIS RAPID-II diffractometer | 5404 independent reflections |
Absorption correction: multi-scan (ABSCOR; Higashi, 1995) | 4801 reflections with I > 2σ(I) |
Tmin = 0.809, Tmax = 0.969 | Rint = 0.026 |
22684 measured reflections |
R[F2 > 2σ(F2)] = 0.030 | 312 parameters |
wR(F2) = 0.080 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.35 e Å−3 |
5404 reflections | Δρmin = −0.28 e Å−3 |
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. |
x | y | z | Uiso*/Ueq | ||
Cl1 | 0.439729 (18) | 0.35812 (3) | 0.16174 (2) | 0.02351 (8) | |
Cl2 | 0.456436 (18) | 0.67256 (3) | 0.58413 (2) | 0.02689 (9) | |
O1 | 0.01868 (5) | 0.88588 (8) | 0.27920 (6) | 0.01579 (17) | |
O2 | 0.12915 (5) | 0.76812 (8) | 0.33753 (6) | 0.01682 (17) | |
O3 | 0.10538 (5) | 1.13611 (8) | 0.50629 (6) | 0.01916 (18) | |
O4 | 0.11331 (5) | 0.90909 (8) | 0.52121 (6) | 0.01844 (18) | |
O5 | −0.03654 (5) | 0.85786 (9) | 0.08701 (6) | 0.01747 (17) | |
H5A | −0.0194 (10) | 0.8553 (16) | 0.1434 (13) | 0.021* | |
H5B | −0.0583 (9) | 0.7825 (18) | 0.0693 (11) | 0.021* | |
O6 | −0.06079 (6) | 0.68283 (9) | 0.36504 (7) | 0.02034 (18) | |
H6A | −0.0353 (10) | 0.7262 (17) | 0.3327 (12) | 0.024* | |
H6B | −0.0720 (9) | 0.7440 (17) | 0.4024 (12) | 0.024* | |
N1 | 0.10896 (6) | 0.55243 (10) | 0.20825 (7) | 0.01391 (19) | |
H1A | 0.1134 | 0.6328 | 0.2409 | 0.021* | |
H1B | 0.0613 | 0.5135 | 0.2079 | 0.021* | |
H1C | 0.1126 | 0.5684 | 0.1469 | 0.021* | |
N2 | 0.09606 (6) | 0.61282 (10) | 0.50244 (7) | 0.0162 (2) | |
H2A | 0.1111 | 0.6780 | 0.4650 | 0.024* | |
H2B | 0.0510 | 0.6400 | 0.5193 | 0.024* | |
H2C | 0.0869 | 0.5329 | 0.4693 | 0.024* | |
C1 | 0.09030 (7) | 0.87682 (11) | 0.32604 (7) | 0.0126 (2) | |
C2 | 0.12851 (6) | 1.00848 (11) | 0.37329 (8) | 0.0127 (2) | |
H2 | 0.1016 | 1.0877 | 0.3352 | 0.015* | |
C3 | 0.11362 (6) | 1.01818 (11) | 0.47553 (8) | 0.0136 (2) | |
C4 | 0.21663 (7) | 1.01807 (11) | 0.37713 (8) | 0.0138 (2) | |
C5 | 0.24195 (7) | 1.08640 (12) | 0.30411 (8) | 0.0173 (2) | |
H5 | 0.2040 | 1.1274 | 0.2534 | 0.021* | |
C6 | 0.32227 (8) | 1.09505 (13) | 0.30482 (10) | 0.0225 (3) | |
H6 | 0.3387 | 1.1402 | 0.2541 | 0.027* | |
C7 | 0.37820 (7) | 1.03784 (13) | 0.37942 (10) | 0.0238 (3) | |
H7 | 0.4330 | 1.0452 | 0.3806 | 0.029* | |
C8 | 0.35360 (7) | 0.96960 (13) | 0.45254 (9) | 0.0227 (3) | |
H8 | 0.3918 | 0.9301 | 0.5037 | 0.027* | |
C9 | 0.27344 (7) | 0.95889 (12) | 0.45108 (9) | 0.0188 (2) | |
H9 | 0.2572 | 0.9109 | 0.5008 | 0.023* | |
C10 | 0.25586 (7) | 0.50774 (12) | 0.25364 (8) | 0.0152 (2) | |
C11 | 0.30228 (7) | 0.42829 (12) | 0.20729 (8) | 0.0170 (2) | |
H11 | 0.2804 | 0.3502 | 0.1715 | 0.020* | |
C12 | 0.38073 (7) | 0.46418 (12) | 0.21377 (8) | 0.0171 (2) | |
C13 | 0.41351 (7) | 0.58019 (12) | 0.26201 (9) | 0.0195 (2) | |
H13 | 0.4672 | 0.6038 | 0.2655 | 0.023* | |
C14 | 0.36614 (7) | 0.66165 (13) | 0.30541 (9) | 0.0215 (3) | |
H14 | 0.3874 | 0.7430 | 0.3374 | 0.026* | |
C15 | 0.28821 (7) | 0.62547 (12) | 0.30251 (9) | 0.0188 (2) | |
H15 | 0.2569 | 0.6808 | 0.3338 | 0.023* | |
C16 | 0.17387 (7) | 0.45831 (12) | 0.25573 (9) | 0.0175 (2) | |
H16A | 0.1651 | 0.3681 | 0.2238 | 0.021* | |
H16B | 0.1710 | 0.4456 | 0.3233 | 0.021* | |
C17 | 0.23541 (7) | 0.54046 (12) | 0.56655 (8) | 0.0163 (2) | |
C18 | 0.30291 (7) | 0.62186 (12) | 0.58334 (8) | 0.0175 (2) | |
H18 | 0.3022 | 0.7109 | 0.6094 | 0.021* | |
C19 | 0.37141 (7) | 0.57119 (13) | 0.56150 (9) | 0.0197 (2) | |
C20 | 0.37432 (8) | 0.44271 (13) | 0.52259 (9) | 0.0227 (3) | |
H20 | 0.4216 | 0.4105 | 0.5074 | 0.027* | |
C21 | 0.30677 (8) | 0.36155 (13) | 0.50613 (9) | 0.0227 (3) | |
H21 | 0.3077 | 0.2730 | 0.4794 | 0.027* | |
C22 | 0.23794 (7) | 0.40932 (12) | 0.52858 (9) | 0.0191 (2) | |
H22 | 0.1923 | 0.3527 | 0.5181 | 0.023* | |
C23 | 0.16042 (7) | 0.59252 (12) | 0.59052 (8) | 0.0176 (2) | |
H23A | 0.1425 | 0.5264 | 0.6332 | 0.021* | |
H23B | 0.1715 | 0.6803 | 0.6253 | 0.021* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.01977 (15) | 0.02374 (15) | 0.02822 (16) | 0.00445 (11) | 0.00803 (12) | −0.00380 (12) |
Cl2 | 0.01780 (15) | 0.02676 (17) | 0.03560 (18) | −0.00173 (11) | 0.00518 (13) | 0.00059 (13) |
O1 | 0.0139 (4) | 0.0185 (4) | 0.0145 (4) | 0.0003 (3) | 0.0021 (3) | −0.0018 (3) |
O2 | 0.0175 (4) | 0.0127 (4) | 0.0199 (4) | 0.0010 (3) | 0.0035 (3) | −0.0034 (3) |
O3 | 0.0283 (5) | 0.0130 (4) | 0.0172 (4) | 0.0028 (3) | 0.0073 (4) | −0.0026 (3) |
O4 | 0.0290 (5) | 0.0124 (4) | 0.0146 (4) | −0.0008 (3) | 0.0065 (3) | 0.0003 (3) |
O5 | 0.0221 (4) | 0.0164 (4) | 0.0127 (4) | −0.0040 (3) | 0.0017 (3) | −0.0005 (3) |
O6 | 0.0251 (5) | 0.0176 (4) | 0.0199 (4) | −0.0012 (3) | 0.0084 (4) | −0.0022 (3) |
N1 | 0.0148 (4) | 0.0134 (4) | 0.0135 (4) | −0.0012 (4) | 0.0031 (4) | −0.0012 (3) |
N2 | 0.0158 (5) | 0.0133 (5) | 0.0197 (5) | 0.0012 (4) | 0.0043 (4) | 0.0015 (4) |
C1 | 0.0146 (5) | 0.0151 (5) | 0.0088 (5) | −0.0007 (4) | 0.0044 (4) | −0.0011 (4) |
C2 | 0.0157 (5) | 0.0101 (5) | 0.0119 (5) | 0.0011 (4) | 0.0027 (4) | 0.0003 (4) |
C3 | 0.0136 (5) | 0.0139 (5) | 0.0129 (5) | −0.0004 (4) | 0.0020 (4) | −0.0017 (4) |
C4 | 0.0162 (5) | 0.0100 (5) | 0.0149 (5) | −0.0005 (4) | 0.0028 (4) | −0.0031 (4) |
C5 | 0.0200 (6) | 0.0140 (5) | 0.0180 (5) | −0.0005 (4) | 0.0045 (5) | −0.0008 (4) |
C6 | 0.0238 (6) | 0.0185 (6) | 0.0286 (6) | −0.0024 (5) | 0.0127 (5) | −0.0013 (5) |
C7 | 0.0167 (6) | 0.0196 (6) | 0.0356 (7) | −0.0015 (5) | 0.0074 (5) | −0.0074 (5) |
C8 | 0.0193 (6) | 0.0204 (6) | 0.0252 (6) | 0.0036 (5) | −0.0016 (5) | −0.0021 (5) |
C9 | 0.0204 (6) | 0.0176 (6) | 0.0174 (5) | 0.0006 (4) | 0.0022 (5) | 0.0005 (4) |
C10 | 0.0147 (5) | 0.0146 (5) | 0.0153 (5) | 0.0004 (4) | 0.0012 (4) | 0.0030 (4) |
C11 | 0.0182 (5) | 0.0143 (5) | 0.0177 (5) | −0.0007 (4) | 0.0022 (5) | −0.0003 (4) |
C12 | 0.0172 (5) | 0.0162 (5) | 0.0177 (5) | 0.0036 (4) | 0.0038 (4) | 0.0015 (4) |
C13 | 0.0140 (5) | 0.0191 (6) | 0.0247 (6) | −0.0015 (4) | 0.0028 (5) | 0.0010 (5) |
C14 | 0.0200 (6) | 0.0166 (6) | 0.0265 (6) | −0.0024 (4) | 0.0027 (5) | −0.0042 (5) |
C15 | 0.0179 (6) | 0.0178 (6) | 0.0208 (6) | 0.0010 (4) | 0.0046 (5) | −0.0022 (4) |
C16 | 0.0159 (5) | 0.0152 (5) | 0.0210 (6) | −0.0002 (4) | 0.0036 (5) | 0.0039 (4) |
C17 | 0.0181 (5) | 0.0166 (5) | 0.0134 (5) | 0.0041 (4) | 0.0023 (4) | 0.0027 (4) |
C18 | 0.0197 (6) | 0.0154 (5) | 0.0168 (5) | 0.0024 (4) | 0.0028 (5) | 0.0009 (4) |
C19 | 0.0174 (5) | 0.0212 (6) | 0.0192 (6) | 0.0007 (5) | 0.0014 (5) | 0.0040 (5) |
C20 | 0.0201 (6) | 0.0243 (6) | 0.0237 (6) | 0.0072 (5) | 0.0053 (5) | 0.0009 (5) |
C21 | 0.0262 (6) | 0.0172 (6) | 0.0231 (6) | 0.0052 (5) | 0.0025 (5) | −0.0024 (5) |
C22 | 0.0194 (6) | 0.0165 (5) | 0.0196 (6) | 0.0007 (4) | 0.0007 (5) | 0.0003 (4) |
C23 | 0.0182 (5) | 0.0175 (5) | 0.0165 (5) | 0.0018 (4) | 0.0031 (5) | −0.0006 (4) |
Cl1—C12 | 1.7427 (12) | C8—C9 | 1.3899 (17) |
Cl2—C19 | 1.7448 (13) | C8—H8 | 0.9500 |
O1—C1 | 1.2714 (14) | C9—H9 | 0.9500 |
O2—C1 | 1.2501 (14) | C10—C11 | 1.3941 (16) |
O3—C3 | 1.2559 (14) | C10—C15 | 1.3975 (16) |
O4—C3 | 1.2538 (14) | C10—C16 | 1.5095 (16) |
O5—H5A | 0.795 (18) | C11—C12 | 1.3878 (16) |
O5—H5B | 0.840 (18) | C11—H11 | 0.9500 |
O6—H6A | 0.828 (18) | C12—C13 | 1.3822 (17) |
O6—H6B | 0.855 (17) | C13—C14 | 1.3914 (18) |
N1—C16 | 1.4921 (14) | C13—H13 | 0.9500 |
N1—H1A | 0.9100 | C14—C15 | 1.3888 (17) |
N1—H1B | 0.9100 | C14—H14 | 0.9500 |
N1—H1C | 0.9100 | C15—H15 | 0.9500 |
N2—C23 | 1.4935 (15) | C16—H16A | 0.9900 |
N2—H2A | 0.9100 | C16—H16B | 0.9900 |
N2—H2B | 0.9100 | C17—C18 | 1.3906 (17) |
N2—H2C | 0.9100 | C17—C22 | 1.3994 (16) |
C1—C2 | 1.5338 (15) | C17—C23 | 1.5092 (16) |
C2—C4 | 1.5199 (15) | C18—C19 | 1.3889 (17) |
C2—C3 | 1.5503 (15) | C18—H18 | 0.9500 |
C2—H2 | 1.0000 | C19—C20 | 1.3818 (18) |
C4—C9 | 1.3960 (16) | C20—C21 | 1.3901 (19) |
C4—C5 | 1.3969 (16) | C20—H20 | 0.9500 |
C5—C6 | 1.3937 (17) | C21—C22 | 1.3880 (18) |
C5—H5 | 0.9500 | C21—H21 | 0.9500 |
C6—C7 | 1.3858 (19) | C22—H22 | 0.9500 |
C6—H6 | 0.9500 | C23—H23A | 0.9900 |
C7—C8 | 1.3916 (19) | C23—H23B | 0.9900 |
C7—H7 | 0.9500 | ||
H5A—O5—H5B | 108.4 (15) | C15—C10—C16 | 121.68 (11) |
H6A—O6—H6B | 102.7 (15) | C12—C11—C10 | 119.51 (11) |
C16—N1—H1A | 109.5 | C12—C11—H11 | 120.2 |
C16—N1—H1B | 109.5 | C10—C11—H11 | 120.2 |
H1A—N1—H1B | 109.5 | C13—C12—C11 | 121.67 (11) |
C16—N1—H1C | 109.5 | C13—C12—Cl1 | 119.33 (9) |
H1A—N1—H1C | 109.5 | C11—C12—Cl1 | 118.99 (9) |
H1B—N1—H1C | 109.5 | C12—C13—C14 | 118.56 (11) |
C23—N2—H2A | 109.5 | C12—C13—H13 | 120.7 |
C23—N2—H2B | 109.5 | C14—C13—H13 | 120.7 |
H2A—N2—H2B | 109.5 | C15—C14—C13 | 120.81 (11) |
C23—N2—H2C | 109.5 | C15—C14—H14 | 119.6 |
H2A—N2—H2C | 109.5 | C13—C14—H14 | 119.6 |
H2B—N2—H2C | 109.5 | C14—C15—C10 | 120.02 (11) |
O2—C1—O1 | 124.07 (10) | C14—C15—H15 | 120.0 |
O2—C1—C2 | 119.50 (10) | C10—C15—H15 | 120.0 |
O1—C1—C2 | 116.40 (9) | N1—C16—C10 | 114.08 (9) |
C4—C2—C1 | 113.34 (9) | N1—C16—H16A | 108.7 |
C4—C2—C3 | 110.39 (9) | C10—C16—H16A | 108.7 |
C1—C2—C3 | 108.67 (9) | N1—C16—H16B | 108.7 |
C4—C2—H2 | 108.1 | C10—C16—H16B | 108.7 |
C1—C2—H2 | 108.1 | H16A—C16—H16B | 107.6 |
C3—C2—H2 | 108.1 | C18—C17—C22 | 119.48 (11) |
O4—C3—O3 | 125.78 (10) | C18—C17—C23 | 120.18 (11) |
O4—C3—C2 | 117.67 (9) | C22—C17—C23 | 120.33 (11) |
O3—C3—C2 | 116.51 (10) | C19—C18—C17 | 119.10 (11) |
C9—C4—C5 | 118.66 (11) | C19—C18—H18 | 120.4 |
C9—C4—C2 | 121.95 (10) | C17—C18—H18 | 120.4 |
C5—C4—C2 | 119.39 (10) | C20—C19—C18 | 121.97 (12) |
C6—C5—C4 | 120.74 (11) | C20—C19—Cl2 | 118.99 (10) |
C6—C5—H5 | 119.6 | C18—C19—Cl2 | 119.04 (10) |
C4—C5—H5 | 119.6 | C19—C20—C21 | 118.74 (11) |
C7—C6—C5 | 120.08 (12) | C19—C20—H20 | 120.6 |
C7—C6—H6 | 120.0 | C21—C20—H20 | 120.6 |
C5—C6—H6 | 120.0 | C22—C21—C20 | 120.31 (12) |
C6—C7—C8 | 119.63 (12) | C22—C21—H21 | 119.8 |
C6—C7—H7 | 120.2 | C20—C21—H21 | 119.8 |
C8—C7—H7 | 120.2 | C21—C22—C17 | 120.38 (11) |
C9—C8—C7 | 120.34 (12) | C21—C22—H22 | 119.8 |
C9—C8—H8 | 119.8 | C17—C22—H22 | 119.8 |
C7—C8—H8 | 119.8 | N2—C23—C17 | 111.54 (9) |
C8—C9—C4 | 120.53 (11) | N2—C23—H23A | 109.3 |
C8—C9—H9 | 119.7 | C17—C23—H23A | 109.3 |
C4—C9—H9 | 119.7 | N2—C23—H23B | 109.3 |
C11—C10—C15 | 119.37 (11) | C17—C23—H23B | 109.3 |
C11—C10—C16 | 118.79 (10) | H23A—C23—H23B | 108.0 |
O2—C1—C2—C4 | 35.03 (14) | C10—C11—C12—C13 | −2.61 (18) |
O1—C1—C2—C4 | −147.07 (10) | C10—C11—C12—Cl1 | 176.06 (9) |
O2—C1—C2—C3 | −88.10 (12) | C11—C12—C13—C14 | 0.44 (18) |
O1—C1—C2—C3 | 89.81 (11) | Cl1—C12—C13—C14 | −178.22 (10) |
C4—C2—C3—O4 | −89.86 (12) | C12—C13—C14—C15 | 1.64 (19) |
C1—C2—C3—O4 | 35.02 (13) | C13—C14—C15—C10 | −1.55 (19) |
C4—C2—C3—O3 | 87.97 (12) | C11—C10—C15—C14 | −0.64 (18) |
C1—C2—C3—O3 | −147.15 (10) | C16—C10—C15—C14 | 174.74 (11) |
C1—C2—C4—C9 | −85.18 (13) | C11—C10—C16—N1 | −119.05 (12) |
C3—C2—C4—C9 | 36.99 (14) | C15—C10—C16—N1 | 65.55 (14) |
C1—C2—C4—C5 | 93.96 (12) | C22—C17—C18—C19 | 0.32 (17) |
C3—C2—C4—C5 | −143.87 (10) | C23—C17—C18—C19 | 179.41 (10) |
C9—C4—C5—C6 | 0.20 (17) | C17—C18—C19—C20 | 0.70 (18) |
C2—C4—C5—C6 | −178.97 (10) | C17—C18—C19—Cl2 | −179.13 (9) |
C4—C5—C6—C7 | −1.26 (18) | C18—C19—C20—C21 | −0.84 (19) |
C5—C6—C7—C8 | 1.21 (19) | Cl2—C19—C20—C21 | 178.99 (10) |
C6—C7—C8—C9 | −0.12 (19) | C19—C20—C21—C22 | −0.04 (19) |
C7—C8—C9—C4 | −0.95 (18) | C20—C21—C22—C17 | 1.05 (19) |
C5—C4—C9—C8 | 0.90 (17) | C18—C17—C22—C21 | −1.18 (18) |
C2—C4—C9—C8 | −179.95 (11) | C23—C17—C22—C21 | 179.73 (11) |
C15—C10—C11—C12 | 2.67 (17) | C18—C17—C23—N2 | 113.48 (12) |
C16—C10—C11—C12 | −172.85 (10) | C22—C17—C23—N2 | −67.43 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O2 | 0.91 | 1.89 | 2.7789 (13) | 165 |
N1—H1B···O1i | 0.91 | 1.91 | 2.7891 (14) | 163 |
N1—H1C···O4ii | 0.91 | 1.82 | 2.7286 (13) | 175 |
N2—H2A···O2 | 0.91 | 2.12 | 2.9783 (13) | 157 |
N2—H2A···O4 | 0.91 | 2.40 | 2.9220 (13) | 117 |
N2—H2B···O5iii | 0.91 | 1.98 | 2.8530 (14) | 159 |
N2—H2C···O5i | 0.91 | 2.01 | 2.8863 (13) | 162 |
O5—H5A···O1 | 0.795 (18) | 1.931 (18) | 2.7158 (12) | 169.2 (16) |
O5—H5B···O3i | 0.841 (17) | 1.868 (17) | 2.6818 (12) | 162.6 (15) |
O6—H6A···O1 | 0.828 (17) | 2.060 (17) | 2.8559 (13) | 161.0 (16) |
O6—H6B···O3iv | 0.856 (17) | 1.945 (17) | 2.7948 (13) | 172.3 (16) |
C9—H9···O4 | 0.95 | 2.58 | 3.2035 (15) | 123 |
C15—H15···O2 | 0.95 | 2.39 | 3.2341 (15) | 148 |
C22—H22···O3v | 0.95 | 2.58 | 3.4936 (15) | 160 |
C23—H23A···O6vi | 0.99 | 2.49 | 3.3424 (15) | 144 |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) x, −y+3/2, z−1/2; (iii) x, −y+3/2, z+1/2; (iv) −x, −y+2, −z+1; (v) x, y−1, z; (vi) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | 2C7H9ClN+·C9H6O42−·2H2O |
Mr | 499.39 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 93 |
a, b, c (Å) | 17.3487 (7), 9.7903 (5), 14.3496 (6) |
β (°) | 103.3832 (12) |
V (Å3) | 2371.07 (17) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.32 |
Crystal size (mm) | 0.36 × 0.25 × 0.10 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID-II |
Absorption correction | Multi-scan (ABSCOR; Higashi, 1995) |
Tmin, Tmax | 0.809, 0.969 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 22684, 5404, 4801 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.030, 0.080, 1.03 |
No. of reflections | 5404 |
No. of parameters | 312 |
No. of restraints | ? |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.35, −0.28 |
Computer programs: PROCESS-AUTO (Rigaku/MSC, 2004), CrystalStructure (Rigaku/MSC, 2004), SIR92 (Altomare et al., 1994), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O2 | 0.91 | 1.89 | 2.7789 (13) | 165 |
N1—H1B···O1i | 0.91 | 1.91 | 2.7891 (14) | 163 |
N1—H1C···O4ii | 0.91 | 1.82 | 2.7286 (13) | 175 |
N2—H2A···O2 | 0.91 | 2.12 | 2.9783 (13) | 157 |
N2—H2A···O4 | 0.91 | 2.40 | 2.9220 (13) | 117 |
N2—H2B···O5iii | 0.91 | 1.98 | 2.8530 (14) | 159 |
N2—H2C···O5i | 0.91 | 2.01 | 2.8863 (13) | 162 |
O5—H5A···O1 | 0.795 (18) | 1.931 (18) | 2.7158 (12) | 169.2 (16) |
O5—H5B···O3i | 0.841 (17) | 1.868 (17) | 2.6818 (12) | 162.6 (15) |
O6—H6A···O1 | 0.828 (17) | 2.060 (17) | 2.8559 (13) | 161.0 (16) |
O6—H6B···O3iv | 0.856 (17) | 1.945 (17) | 2.7948 (13) | 172.3 (16) |
C9—H9···O4 | 0.95 | 2.58 | 3.2035 (15) | 123 |
C15—H15···O2 | 0.95 | 2.39 | 3.2341 (15) | 148 |
C22—H22···O3v | 0.95 | 2.58 | 3.4936 (15) | 160 |
C23—H23A···O6vi | 0.99 | 2.49 | 3.3424 (15) | 144 |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) x, −y+3/2, z−1/2; (iii) x, −y+3/2, z+1/2; (iv) −x, −y+2, −z+1; (v) x, y−1, z; (vi) −x, −y+1, −z+1. |
Acknowledgements
This work was partly supported by a Grant-in-Aid for Scientific Research (C) (No. 22550013) from the Japan Society for the Promotion of Science.
References
Altomare, A., Cascarano, G., Giacovazzo, C., Guagliardi, A., Burla, M. C., Polidori, G. & Camalli, M. (1994). J. Appl. Cryst. 27, 435. CrossRef Web of Science IUCr Journals Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Gotoh, K. & Ishida, H. (2009). Acta Cryst. C65, o534–o538. Web of Science CSD CrossRef IUCr Journals Google Scholar
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan. Google Scholar
Rigaku/MSC (2004). PROCESS-AUTO and CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Ueda, S., Fukunaga, T. & Ishida, H. (2005). Acta Cryst. E61, o1845–o1847. Web of Science CSD CrossRef IUCr Journals Google Scholar
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 was investigated as part of a structural study on D—H···A hydrogen bonding (D = N, O or C; A = N or O) in carboxylic acid and pyridine systems (Ueda et al., 2005; Gotoh & Ishida, 2009).
The molecular structure of the compound and the crystal packing of the molecules viewed along the crystallographic b axis are shown in Figures 1 and 2, respectively. In its asymmetric unit the title compound has two crystallographically independent cations, one dianion and two water molecules. The two 3-chlorobenzylammonium cations have inverted but otherwise virtually indentical conformations as shown by the rotational angle of the ammonium group against the remainder of the molecule, N1-C16-C10-C11 = -119.04 (12)° and N2-C23-C17-C18 = 113.49 (12)° for the two groups (the two crystallographically independent ions are opposite enantiomers, but as as the structure is centrosymmetric both ions are present as racemic pairs throughout the structure).
The C—O bond length in one of the carboxylates is slightly longer than in the other with the respective values of O1—C1 and O2—C1 being 1.2714 (14) and 1.2501 (14) Å. The O3—C3 and O4—C3 bond lengths in the other carboxylates are 1.2559 (14) and 1.2538 (14) Å, respectively, making the carbonyl distance in the latter indistinguishable from the single bond due to resonance. The slight difference in the two sets of carbonyl distances may be attributed to the number of H bonds their respective O atoms are involved in, as H bonds tend to stabilize negative charge at the O atoms. The three O atoms with only two strong H bonds have C-O distances below 1.6 Å, the one with three strong H bonds has a C-O distance larger than 1.7 Å.
The molecules associate by placement of all the phenyl rings in one direction, while the hydrophilic ammonium and the carboxylate ends are oriented towards the other end and are hydrogen bonded to water molecules, resulting in alternating hydrophobic and hydrophylic regions respectively in the crystal packing. In the hydrophilic regions the water molecules act as donors and acceptors in an extended hydrogen bonding network. Each water molecule serves as a bridge that links a 3-chlorobenzylammonium moiety and a phenylmalonate group. This arrangement affords an interconnectivity of water and donor protons such that two of the ammonium H atoms are donated to the water O atoms in a short N—H···O contact of comparable length [N2—H2B···O5iii = 1.98Å and N2—H2C···O5i = 2.01Å; Table 1], while the water H atoms are donated to the carboxylate O atoms [O5—H5A···O1 = 1.931 (18), O5—H5B···O3i = 1.868 (17), O6—H6A···O1 = 2.060 (17) and O6—H6B···O3iv = 1.945 (17) Å; Table 1].
In the hydrophobic regions the chloro-substituted aromatic rings show some stacking of parallel-shifted aromatic rings with each other, but the shortest centroid to centroid distance is larger than 4.3 Å and the interplanar separation is with greater than 3.6 Å also rather long for an attractive π-π stacking interaction. In the absence of any other directional interactions in the hydrophobic section of the structure it thus can be assumed that the crystal packing in these layers is likely to be dominated by shape recognition via dispersion forces.