metal-organic compounds
Bis[3-(2-carboxyethenyl)pyridinium-1-acetato]dichloridozinc(II)
aShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, People's Republic of China
*Correspondence e-mail: eqgao@chem.ecnu.edu.cn
In the title complex, [ZnCl2(C10H9NO4)2], the ZnII ion lies on a twofold rotation axis and is four-coordinated by two carboxylate O atoms from two 3-(2-carboxyethenyl)pyridinium-1-acetate ligands in a monodentate mode and two Cl atoms in a distorted tetrahedral geometry. In the intermolecular O—H⋯O hydrogen bonds link the molecules into a double-chain structure extending parallel to [101].
Related literature
For general background to hydrogen bonds, see: Beatty (2003); Liu et al. (2008); Steiner (2002). For related structures, see: Mao et al. (1999); Sun et al. (2009); Wu et al. (2006); Zhang et al. (2002).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S160053680904793X/hy2249sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S160053680904793X/hy2249Isup2.hkl
The zwitterionic ligand was synthesized from ethyl pyridine-3-acrylate and ethyl bromoacetate according to the procedure for similar compounds (Mao et al., 1999). A mixture of the ligand (0.021 g, 0.10 mmol), ZnCl2 (0.014 g, 0.10 mmol), NaN3 (0.026 g, 0.40 mmol), ethanol (1.0 ml) and H2O (2.0 ml) was sealed in a Teflon-lined autoclave and heated at 343 K for 3 d, then cooled to room temperature at a rate of 5 K h-1, giving a pale yellow solution. Slow evaporation of the solution at room temperature for several days afforded colorless block crystals of the title compound (yield 46%). Analysis, calculated for C20H18Cl2N2O8Zn: C 27.22, H 3.43, N 22.22%; found: C 27.11, H 3.82, N 22.50%. FT—IR (KBr, cm-1): 3530m, 3348br, 2084vs, 2059vs, 1630vs, 1582 s, 1505m, 1461w, 1388vs, 1307m, 985m.
H atoms attached to C atoms were placed at calculated positions and refined as riding atoms, with C—H = 0.93 (CH) and 0.97 (CH2) Å and with Uiso(H) = 1.2Ueq(C). The carboxylic H atom (H4B) was located from a difference Fourier map and refined isotropically.
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[ZnCl2(C10H9NO4)2] | F(000) = 1120 |
Mr = 550.63 | Dx = 1.708 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 9202 reflections |
a = 16.6247 (6) Å | θ = 2.3–26.0° |
b = 7.1973 (3) Å | µ = 1.45 mm−1 |
c = 18.8873 (7) Å | T = 296 K |
β = 108.685 (1)° | Block, colorless |
V = 2140.81 (14) Å3 | 0.12 × 0.12 × 0.08 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 2450 independent reflections |
Radiation source: fine-focus sealed tube | 2309 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
ϕ and ω scans | θmax = 27.5°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −21→20 |
Tmin = 0.845, Tmax = 0.893 | k = −9→8 |
27422 measured reflections | l = −24→23 |
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)] = 0.028 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.077 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0424P)2 + 2.553P] where P = (Fo2 + 2Fc2)/3 |
2450 reflections | (Δ/σ)max < 0.001 |
154 parameters | Δρmax = 0.50 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
[ZnCl2(C10H9NO4)2] | V = 2140.81 (14) Å3 |
Mr = 550.63 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 16.6247 (6) Å | µ = 1.45 mm−1 |
b = 7.1973 (3) Å | T = 296 K |
c = 18.8873 (7) Å | 0.12 × 0.12 × 0.08 mm |
β = 108.685 (1)° |
Bruker APEXII CCD diffractometer | 2450 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 2309 reflections with I > 2σ(I) |
Tmin = 0.845, Tmax = 0.893 | Rint = 0.019 |
27422 measured reflections |
R[F2 > 2σ(F2)] = 0.028 | 0 restraints |
wR(F2) = 0.077 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.50 e Å−3 |
2450 reflections | Δρmin = −0.24 e Å−3 |
154 parameters |
x | y | z | Uiso*/Ueq | ||
Zn1 | 0.0000 | 0.21438 (4) | 0.2500 | 0.02879 (10) | |
C1 | 0.10900 (11) | 0.5110 (3) | 0.25776 (10) | 0.0324 (4) | |
C2 | 0.14353 (12) | 0.6811 (3) | 0.22916 (10) | 0.0360 (4) | |
H2A | 0.1139 | 0.7904 | 0.2379 | 0.043* | |
H2B | 0.2032 | 0.6953 | 0.2576 | 0.043* | |
C3 | 0.20158 (11) | 0.6192 (3) | 0.12864 (11) | 0.0370 (4) | |
H3A | 0.2525 | 0.5883 | 0.1649 | 0.044* | |
C4 | 0.19519 (13) | 0.6114 (3) | 0.05458 (12) | 0.0432 (4) | |
H4A | 0.2413 | 0.5734 | 0.0405 | 0.052* | |
C5 | 0.12009 (13) | 0.6600 (3) | 0.00115 (11) | 0.0395 (4) | |
H5A | 0.1155 | 0.6563 | −0.0492 | 0.047* | |
C6 | 0.06027 (11) | 0.7173 (2) | 0.09822 (10) | 0.0318 (4) | |
H6A | 0.0146 | 0.7511 | 0.1137 | 0.038* | |
C7 | 0.05107 (12) | 0.7146 (2) | 0.02242 (10) | 0.0323 (4) | |
C8 | −0.02829 (13) | 0.7712 (3) | −0.03508 (10) | 0.0371 (4) | |
H8A | −0.0273 | 0.7784 | −0.0840 | 0.044* | |
C9 | −0.10021 (13) | 0.8126 (3) | −0.02414 (11) | 0.0401 (4) | |
H9A | −0.1045 | 0.8061 | 0.0237 | 0.048* | |
C10 | −0.17521 (12) | 0.8700 (3) | −0.08844 (10) | 0.0380 (4) | |
N1 | 0.13464 (9) | 0.6713 (2) | 0.14914 (8) | 0.0290 (3) | |
O1 | 0.06462 (9) | 0.39902 (19) | 0.21043 (7) | 0.0371 (3) | |
O2 | 0.12548 (10) | 0.5002 (2) | 0.32652 (7) | 0.0509 (4) | |
O3 | −0.17174 (10) | 0.9091 (3) | −0.14938 (9) | 0.0574 (4) | |
O4 | −0.24415 (10) | 0.8769 (3) | −0.07066 (9) | 0.0592 (5) | |
H4B | −0.290 (2) | 0.919 (5) | −0.1137 (19) | 0.091 (11)* | |
Cl1 | 0.07978 (3) | 0.02552 (6) | 0.34083 (2) | 0.03619 (12) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Zn1 | 0.03138 (16) | 0.03059 (16) | 0.02483 (15) | 0.000 | 0.00960 (11) | 0.000 |
C1 | 0.0285 (8) | 0.0387 (9) | 0.0288 (8) | −0.0027 (7) | 0.0075 (6) | 0.0018 (7) |
C2 | 0.0417 (9) | 0.0378 (9) | 0.0263 (8) | −0.0084 (8) | 0.0076 (7) | −0.0012 (7) |
C3 | 0.0288 (8) | 0.0389 (9) | 0.0422 (9) | 0.0025 (7) | 0.0099 (7) | 0.0063 (8) |
C4 | 0.0391 (10) | 0.0484 (11) | 0.0485 (11) | 0.0031 (8) | 0.0231 (8) | 0.0044 (9) |
C5 | 0.0492 (11) | 0.0384 (9) | 0.0343 (9) | −0.0016 (8) | 0.0183 (8) | 0.0024 (8) |
C6 | 0.0289 (8) | 0.0313 (8) | 0.0345 (9) | 0.0009 (6) | 0.0090 (7) | 0.0001 (7) |
C7 | 0.0356 (9) | 0.0271 (8) | 0.0308 (8) | −0.0020 (6) | 0.0059 (7) | 0.0030 (6) |
C8 | 0.0411 (10) | 0.0382 (9) | 0.0283 (8) | −0.0014 (8) | 0.0060 (7) | 0.0027 (7) |
C9 | 0.0447 (10) | 0.0434 (10) | 0.0292 (9) | 0.0027 (8) | 0.0077 (8) | −0.0009 (8) |
C10 | 0.0422 (10) | 0.0332 (9) | 0.0329 (9) | 0.0023 (7) | 0.0040 (7) | −0.0018 (7) |
N1 | 0.0304 (7) | 0.0282 (6) | 0.0268 (7) | −0.0021 (5) | 0.0069 (5) | 0.0026 (5) |
O1 | 0.0436 (7) | 0.0394 (7) | 0.0300 (6) | −0.0126 (6) | 0.0142 (5) | −0.0051 (5) |
O2 | 0.0545 (9) | 0.0663 (10) | 0.0266 (6) | −0.0263 (8) | 0.0056 (6) | 0.0030 (6) |
O3 | 0.0447 (8) | 0.0801 (12) | 0.0441 (8) | 0.0034 (8) | 0.0094 (7) | 0.0092 (8) |
O4 | 0.0445 (8) | 0.0929 (14) | 0.0360 (8) | 0.0210 (9) | 0.0070 (6) | 0.0123 (8) |
Cl1 | 0.0369 (2) | 0.0387 (2) | 0.0321 (2) | 0.00658 (17) | 0.00991 (17) | 0.00704 (16) |
Zn1—O1 | 1.9983 (13) | C5—C7 | 1.388 (3) |
Zn1—Cl1 | 2.2566 (4) | C5—H5A | 0.9300 |
C1—O2 | 1.241 (2) | C6—N1 | 1.342 (2) |
C1—O1 | 1.253 (2) | C6—C7 | 1.390 (3) |
C1—C2 | 1.522 (3) | C6—H6A | 0.9300 |
C2—N1 | 1.472 (2) | C7—C8 | 1.473 (2) |
C2—H2A | 0.9700 | C8—C9 | 1.311 (3) |
C2—H2B | 0.9700 | C8—H8A | 0.9300 |
C3—N1 | 1.343 (2) | C9—C10 | 1.493 (3) |
C3—C4 | 1.370 (3) | C9—H9A | 0.9300 |
C3—H3A | 0.9300 | C10—O3 | 1.204 (3) |
C4—C5 | 1.376 (3) | C10—O4 | 1.294 (3) |
C4—H4A | 0.9300 | O4—H4B | 0.97 (4) |
O1i—Zn1—O1 | 96.63 (8) | C4—C5—H5A | 120.0 |
O1i—Zn1—Cl1i | 115.43 (4) | C7—C5—H5A | 120.0 |
O1—Zn1—Cl1i | 111.82 (4) | N1—C6—C7 | 120.43 (17) |
O1i—Zn1—Cl1 | 111.82 (4) | N1—C6—H6A | 119.8 |
O1—Zn1—Cl1 | 115.43 (4) | C7—C6—H6A | 119.8 |
Cl1i—Zn1—Cl1 | 105.92 (3) | C5—C7—C6 | 118.26 (17) |
O2—C1—O1 | 126.04 (17) | C5—C7—C8 | 119.55 (17) |
O2—C1—C2 | 116.10 (16) | C6—C7—C8 | 122.18 (17) |
O1—C1—C2 | 117.82 (15) | C9—C8—C7 | 126.40 (18) |
N1—C2—C1 | 113.62 (15) | C9—C8—H8A | 116.8 |
N1—C2—H2A | 108.8 | C7—C8—H8A | 116.8 |
C1—C2—H2A | 108.8 | C8—C9—C10 | 120.04 (18) |
N1—C2—H2B | 108.8 | C8—C9—H9A | 120.0 |
C1—C2—H2B | 108.8 | C10—C9—H9A | 120.0 |
H2A—C2—H2B | 107.7 | O3—C10—O4 | 123.81 (18) |
N1—C3—C4 | 120.36 (17) | O3—C10—C9 | 123.98 (19) |
N1—C3—H3A | 119.8 | O4—C10—C9 | 112.19 (17) |
C4—C3—H3A | 119.8 | C6—N1—C3 | 121.35 (16) |
C3—C4—C5 | 119.60 (18) | C6—N1—C2 | 119.36 (15) |
C3—C4—H4A | 120.2 | C3—N1—C2 | 119.28 (15) |
C5—C4—H4A | 120.2 | C1—O1—Zn1 | 115.16 (11) |
C4—C5—C7 | 119.98 (18) | C10—O4—H4B | 109 (2) |
O2—C1—C2—N1 | 170.27 (17) | C8—C9—C10—O4 | 169.7 (2) |
O1—C1—C2—N1 | −12.1 (2) | C7—C6—N1—C3 | −1.0 (3) |
N1—C3—C4—C5 | 1.0 (3) | C7—C6—N1—C2 | 178.06 (16) |
C3—C4—C5—C7 | −0.7 (3) | C4—C3—N1—C6 | −0.2 (3) |
C4—C5—C7—C6 | −0.4 (3) | C4—C3—N1—C2 | −179.18 (18) |
C4—C5—C7—C8 | 178.33 (19) | C1—C2—N1—C6 | 82.1 (2) |
N1—C6—C7—C5 | 1.2 (3) | C1—C2—N1—C3 | −98.9 (2) |
N1—C6—C7—C8 | −177.45 (16) | O2—C1—O1—Zn1 | 11.0 (3) |
C5—C7—C8—C9 | 174.5 (2) | C2—C1—O1—Zn1 | −166.35 (13) |
C6—C7—C8—C9 | −6.8 (3) | O1i—Zn1—O1—C1 | 57.77 (12) |
C7—C8—C9—C10 | 179.31 (18) | Cl1i—Zn1—O1—C1 | 178.59 (12) |
C8—C9—C10—O3 | −11.8 (3) | Cl1—Zn1—O1—C1 | −60.24 (14) |
Symmetry code: (i) −x, y, −z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4B···O2ii | 0.97 (4) | 1.60 (4) | 2.560 (2) | 169 (3) |
Symmetry code: (ii) x−1/2, −y+3/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [ZnCl2(C10H9NO4)2] |
Mr | 550.63 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 16.6247 (6), 7.1973 (3), 18.8873 (7) |
β (°) | 108.685 (1) |
V (Å3) | 2140.81 (14) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.45 |
Crystal size (mm) | 0.12 × 0.12 × 0.08 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.845, 0.893 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 27422, 2450, 2309 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.028, 0.077, 1.06 |
No. of reflections | 2450 |
No. of parameters | 154 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.50, −0.24 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4B···O2i | 0.97 (4) | 1.60 (4) | 2.560 (2) | 169 (3) |
Symmetry code: (i) x−1/2, −y+3/2, z−1/2. |
Acknowledgements
We are grateful for financial support from the NSFC (grant No. 20771038) and the Shanghai Leading Academic Discipline Project (B409).
References
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As we know, hydrogen bond is the most important of all directional intermolecular interactions. It is operative in determining molecular conformation, molecular aggregation, and the function of a vast number of chemical systems ranging from inorganic to biological (Beatty, 2003; Liu et al., 2008; Steiner, 2002). In this paper, we report the coordination and hydrogen-bond structure of the title complex derived from a zwitterionic dicarboxylic ligand, 1-carboxymethylpyridinium-3-acrylic acid. Zwitterionic dicarboxylic acids as ligands have received less attention in coordination chemistry than the common dicarboxylic acids, although an increasing number of coordination compounds with such ligands have been reported in recent years (Mao et al., 1999; Wu et al., 2006; Zhang et al., 2002).
The molecular structure is shown in Fig. 1. The ZnII ion, lying on a twofold rotation axis, is coordinated by two Cl atoms and the two zwitterionic ligands through carboxylate O atoms, with a distorted tetrahedral coordination geometry. The Zn—Cl and Zn—O distances lie in the usual range for a tetrahedral ZnII center (Table 1). The zwitterionic ligand is neutral with an anionic N-acetate group in a monodentate coordination mode and a cationic pyridinium ring. The acrylic group remains protonated and uncoordinated. This is in contrast with the only previous coordination compound with this ligand, [Ni3(C10H8NO4)2(N3)4(H2O)2].5H2O (Sun et al., 2009), in which both carboxylate groups are deprotonated and coordinated in a bidentate bridging mode, giving an extended coordination network. As shown in Fig. 2, the mononuclear complex molecules in the title compound are associated into a one-dimensional chain along the [101] direction through intermolecular O—H···O hydrogen bonds (Table 2). The hydrogen bond involves the acrylic hydroxyl group (O4—H4B) from one molecule and the uncoordinated acetate O atom (O2) from another molecule.