metal-organic compounds
Poly[[(μ-benzene-1,4-dicarboxylato)bis[μ-4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)benzoato]dizinc] tetrahydrate]
aSchool of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
*Correspondence e-mail: , guangbochejl@yahoo.com
In the title complex, [Zn2(C8H4O4)(C20H11N4O2)2]·4H2O, the ZnII atom is six-coordinated by two carboxylate O atoms from one bidentate benzene-1,4-dicarboxylate (1,4-BDC) ligand, two carboxylate O atoms from two different monodentate 4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)benzoate (HNCP) ligands and two HNCP N atoms. The ZnII atoms are bridged by the centrosymmetric 1,4-BDC ligands, forming an extended single-chain structure. Neighbouring single chains are connected by the HNCP ligands from two opposite directions, resulting in a sheet. In addition, there are N—H⋯O hydrogen-bonding interactions between adjacent layers. As a result, the polymeric sheets are further extended into a three-dimensional supramolecular structure.
Related literature
For the preparation of the 4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)benzoate (HNCP) ligand, see: Yongqin et al. (2007). For coordination polymers with a variety of supramolecular structures, see: Eddaoudi et al. (2001); Chen & Liu (2002). For HNCP-based complexes, see Yongqin et al. (2007); Hsu et al. (2005).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2002); cell SAINT (Bruker, 2002); 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); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536811040062/bg2420sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811040062/bg2420Isup2.hkl
HNCP was prepared according to the literature method (Yongqin et al., 2007). Other reagents were commercially available and used without further purification. Zn(CH3COO)2 (0.2 mmol), 1,4-BDC (0.1 mmol), and HNCP (0.1 mmol) were mixed in 10 ml deionized water. And its pH value was controlled in the range of 7–8 with 1 mol/L NaOH solution. Then, the resulting precursor was placed in 25 ml Teflon-lined stainless steel reactor, and heated at 433 K for 3 d. Cooling slowly to room temperature, the yellow block crystals of the title complex suitable for X-ray
were obtained.All C- and N- attached H atoms were positioned geometrically (N—H = 0.86Å and C—H = 0.93 Å) and refined as riding, with Uiso(H)= 1.2Ueq(C). Hydrogen atoms corresponding to water molecules could not be confidently located and were not included in the model.
Data collection: SMART (Bruker, 2002); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[Zn2(C8H4O4)(C20H11N4O2)2]·4H2O | Z = 1 |
Mr = 1037.54 | F(000) = 526 |
Triclinic, P1 | Dx = 1.651 Mg m−3 Dm = 1.651 Mg m−3 Dm measured by not measured |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.7477 (16) Å | Cell parameters from 5729 reflections |
b = 10.2610 (18) Å | θ = 2.9–25.3° |
c = 11.0480 (19) Å | µ = 1.23 mm−1 |
α = 88.849 (3)° | T = 293 K |
β = 72.115 (4)° | Block, yellow |
γ = 83.121 (3)° | 0.2 × 0.2 × 0.2 mm |
V = 1043.9 (3) Å3 |
Bruker SMART CCD area-detector diffractometer | 3783 independent reflections |
Radiation source: fine-focus sealed tube | 2797 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
ω scans | θmax = 25.3°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | h = −11→10 |
Tmin = 0.782, Tmax = 0.782 | k = −12→11 |
5406 measured reflections | l = −10→13 |
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)] = 0.056 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0678P)2 + 0.7102P] where P = (Fo2 + 2Fc2)/3 |
3783 reflections | (Δ/σ)max < 0.001 |
316 parameters | Δρmax = 0.94 e Å−3 |
0 restraints | Δρmin = −0.66 e Å−3 |
[Zn2(C8H4O4)(C20H11N4O2)2]·4H2O | γ = 83.121 (3)° |
Mr = 1037.54 | V = 1043.9 (3) Å3 |
Triclinic, P1 | Z = 1 |
a = 9.7477 (16) Å | Mo Kα radiation |
b = 10.2610 (18) Å | µ = 1.23 mm−1 |
c = 11.0480 (19) Å | T = 293 K |
α = 88.849 (3)° | 0.2 × 0.2 × 0.2 mm |
β = 72.115 (4)° |
Bruker SMART CCD area-detector diffractometer | 3783 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | 2797 reflections with I > 2σ(I) |
Tmin = 0.782, Tmax = 0.782 | Rint = 0.029 |
5406 measured reflections |
R[F2 > 2σ(F2)] = 0.056 | 0 restraints |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.94 e Å−3 |
3783 reflections | Δρmin = −0.66 e Å−3 |
316 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | ||
Zn1 | 0.39808 (6) | 0.38395 (5) | 0.54113 (5) | 0.0246 (2) | |
C1 | 0.6671 (5) | 0.1755 (5) | 0.4727 (5) | 0.0305 (12) | |
H1 | 0.7021 | 0.2253 | 0.5235 | 0.037* | |
C2 | 0.7546 (5) | 0.0643 (5) | 0.4098 (5) | 0.0318 (12) | |
H2 | 0.8454 | 0.0403 | 0.4200 | 0.038* | |
C3 | 0.7059 (5) | −0.0093 (5) | 0.3327 (5) | 0.0304 (12) | |
H3 | 0.7632 | −0.0835 | 0.2900 | 0.036* | |
C4 | 0.5686 (5) | 0.0291 (4) | 0.3194 (4) | 0.0212 (10) | |
C5 | 0.5041 (5) | −0.0321 (4) | 0.2395 (4) | 0.0237 (11) | |
C6 | 0.3733 (5) | 0.0143 (4) | 0.2210 (5) | 0.0252 (11) | |
C7 | 0.2859 (5) | 0.1260 (5) | 0.2933 (5) | 0.0253 (11) | |
C8 | 0.1468 (5) | 0.1777 (5) | 0.2890 (5) | 0.0333 (12) | |
H8 | 0.1048 | 0.1402 | 0.2352 | 0.040* | |
C9 | 0.0745 (6) | 0.2835 (5) | 0.3647 (5) | 0.0380 (14) | |
H9 | −0.0181 | 0.3176 | 0.3641 | 0.046* | |
C10 | 0.1403 (5) | 0.3396 (5) | 0.4423 (5) | 0.0333 (13) | |
H10 | 0.0903 | 0.4124 | 0.4924 | 0.040* | |
C11 | 0.3431 (5) | 0.1878 (4) | 0.3759 (4) | 0.0232 (10) | |
C12 | 0.4856 (5) | 0.1422 (4) | 0.3874 (4) | 0.0208 (10) | |
C13 | 0.4616 (5) | −0.1529 (4) | 0.0957 (5) | 0.0243 (11) | |
C14 | 0.4894 (5) | −0.2566 (4) | −0.0019 (5) | 0.0255 (11) | |
C15 | 0.6139 (5) | −0.3454 (5) | −0.0274 (5) | 0.0299 (12) | |
H15 | 0.6767 | −0.3415 | 0.0207 | 0.036* | |
C16 | 0.6468 (5) | −0.4398 (5) | −0.1230 (5) | 0.0298 (12) | |
H16 | 0.7298 | −0.4998 | −0.1371 | 0.036* | |
C17 | 0.5563 (5) | −0.4452 (4) | −0.1980 (4) | 0.0246 (11) | |
C18 | 0.4302 (5) | −0.3563 (4) | −0.1718 (4) | 0.0251 (11) | |
H18 | 0.3680 | −0.3587 | −0.2206 | 0.030* | |
C19 | 0.3971 (5) | −0.2648 (5) | −0.0741 (5) | 0.0271 (11) | |
H19 | 0.3114 | −0.2079 | −0.0566 | 0.033* | |
C20 | 0.5974 (6) | −0.5445 (5) | −0.3046 (5) | 0.0296 (12) | |
C21 | −0.0493 (5) | 0.4022 (5) | 1.0852 (5) | 0.0307 (12) | |
H23 | −0.0820 | 0.3366 | 1.1424 | 0.037* | |
C22 | 0.0434 (5) | 0.3690 (5) | 0.9641 (5) | 0.0315 (12) | |
H22 | 0.0721 | 0.2812 | 0.9401 | 0.038* | |
C23 | 0.0935 (5) | 0.4665 (5) | 0.8785 (5) | 0.0291 (12) | |
C24 | 0.1997 (5) | 0.4312 (5) | 0.7506 (5) | 0.0261 (11) | |
N1 | 0.5364 (4) | 0.2129 (4) | 0.4629 (4) | 0.0230 (9) | |
N2 | 0.2706 (4) | 0.2945 (4) | 0.4484 (4) | 0.0248 (9) | |
N3 | 0.5581 (4) | −0.1389 (4) | 0.1592 (4) | 0.0242 (9) | |
H4 | 0.6385 | −0.1880 | 0.1506 | 0.029* | |
N4 | 0.3485 (4) | −0.0610 (4) | 0.1302 (4) | 0.0256 (9) | |
O1 | 0.6824 (5) | −0.6414 (4) | −0.3044 (4) | 0.0562 (12) | |
O2 | 0.5370 (4) | −0.5184 (3) | −0.3944 (3) | 0.0269 (8) | |
O3 | 0.2806 (4) | 0.3234 (3) | 0.7355 (3) | 0.0326 (8) | |
O4 | 0.2120 (4) | 0.5109 (3) | 0.6606 (3) | 0.0333 (8) | |
O1W | 0.0693 (8) | −0.0278 (10) | 0.0842 (10) | 0.193 (5) | |
O2W | 0.9457 (7) | 0.2012 (9) | 0.7044 (9) | 0.165 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Zn1 | 0.0281 (3) | 0.0233 (3) | 0.0200 (3) | −0.0011 (2) | −0.0043 (2) | −0.0080 (2) |
C1 | 0.030 (3) | 0.034 (3) | 0.028 (3) | 0.000 (2) | −0.011 (2) | −0.012 (2) |
C2 | 0.023 (3) | 0.038 (3) | 0.038 (3) | 0.001 (2) | −0.015 (2) | −0.011 (2) |
C3 | 0.032 (3) | 0.026 (3) | 0.033 (3) | 0.005 (2) | −0.013 (2) | −0.008 (2) |
C4 | 0.027 (2) | 0.017 (2) | 0.019 (2) | −0.0010 (19) | −0.007 (2) | −0.0037 (19) |
C5 | 0.029 (3) | 0.022 (2) | 0.019 (3) | 0.002 (2) | −0.009 (2) | −0.008 (2) |
C6 | 0.032 (3) | 0.025 (3) | 0.020 (3) | −0.006 (2) | −0.009 (2) | −0.003 (2) |
C7 | 0.030 (3) | 0.025 (2) | 0.022 (3) | 0.001 (2) | −0.011 (2) | −0.003 (2) |
C8 | 0.032 (3) | 0.031 (3) | 0.040 (3) | 0.002 (2) | −0.018 (3) | −0.009 (2) |
C9 | 0.033 (3) | 0.036 (3) | 0.046 (4) | 0.011 (2) | −0.019 (3) | −0.011 (3) |
C10 | 0.028 (3) | 0.030 (3) | 0.037 (3) | 0.009 (2) | −0.007 (2) | −0.010 (2) |
C11 | 0.024 (2) | 0.027 (3) | 0.017 (3) | −0.004 (2) | −0.004 (2) | −0.001 (2) |
C12 | 0.024 (2) | 0.018 (2) | 0.017 (2) | −0.0006 (19) | −0.003 (2) | −0.0024 (19) |
C13 | 0.028 (3) | 0.024 (3) | 0.023 (3) | −0.001 (2) | −0.011 (2) | −0.001 (2) |
C14 | 0.033 (3) | 0.022 (2) | 0.021 (3) | −0.004 (2) | −0.007 (2) | −0.003 (2) |
C15 | 0.039 (3) | 0.028 (3) | 0.027 (3) | 0.003 (2) | −0.019 (2) | −0.011 (2) |
C16 | 0.034 (3) | 0.025 (3) | 0.033 (3) | 0.003 (2) | −0.016 (2) | −0.005 (2) |
C17 | 0.039 (3) | 0.019 (2) | 0.018 (3) | −0.004 (2) | −0.011 (2) | −0.0010 (19) |
C18 | 0.033 (3) | 0.025 (3) | 0.021 (3) | −0.008 (2) | −0.012 (2) | 0.001 (2) |
C19 | 0.028 (3) | 0.028 (3) | 0.025 (3) | 0.001 (2) | −0.008 (2) | −0.004 (2) |
C20 | 0.036 (3) | 0.024 (3) | 0.029 (3) | 0.000 (2) | −0.012 (2) | −0.004 (2) |
C21 | 0.029 (3) | 0.032 (3) | 0.026 (3) | 0.002 (2) | −0.003 (2) | 0.001 (2) |
C22 | 0.029 (3) | 0.033 (3) | 0.027 (3) | 0.002 (2) | −0.002 (2) | −0.009 (2) |
C23 | 0.025 (3) | 0.038 (3) | 0.022 (3) | 0.002 (2) | −0.004 (2) | −0.010 (2) |
C24 | 0.022 (2) | 0.032 (3) | 0.024 (3) | 0.000 (2) | −0.008 (2) | −0.009 (2) |
N1 | 0.026 (2) | 0.022 (2) | 0.022 (2) | −0.0031 (17) | −0.0075 (18) | −0.0031 (17) |
N2 | 0.030 (2) | 0.020 (2) | 0.023 (2) | 0.0034 (17) | −0.0070 (18) | −0.0079 (17) |
N3 | 0.024 (2) | 0.025 (2) | 0.024 (2) | 0.0051 (17) | −0.0101 (18) | −0.0102 (17) |
N4 | 0.029 (2) | 0.025 (2) | 0.024 (2) | 0.0014 (17) | −0.0113 (18) | −0.0052 (17) |
O1 | 0.084 (3) | 0.042 (2) | 0.048 (3) | 0.023 (2) | −0.038 (2) | −0.021 (2) |
O2 | 0.0374 (19) | 0.0286 (18) | 0.0185 (18) | −0.0098 (15) | −0.0122 (16) | −0.0003 (14) |
O3 | 0.0286 (18) | 0.037 (2) | 0.026 (2) | 0.0072 (16) | −0.0025 (16) | −0.0083 (16) |
O4 | 0.034 (2) | 0.038 (2) | 0.022 (2) | 0.0040 (16) | −0.0042 (16) | −0.0012 (16) |
O1W | 0.133 (6) | 0.237 (10) | 0.239 (11) | 0.082 (6) | −0.129 (7) | −0.141 (9) |
O2W | 0.077 (5) | 0.214 (9) | 0.183 (9) | 0.004 (5) | −0.022 (5) | 0.052 (7) |
Zn1—O2i | 2.071 (3) | C13—N4 | 1.326 (6) |
Zn1—O2ii | 2.102 (3) | C13—N3 | 1.356 (6) |
Zn1—N1 | 2.103 (4) | C13—C14 | 1.472 (6) |
Zn1—N2 | 2.128 (4) | C14—C19 | 1.384 (7) |
Zn1—O4 | 2.182 (3) | C14—C15 | 1.385 (6) |
Zn1—O3 | 2.217 (4) | C15—C16 | 1.384 (7) |
Zn1—C24 | 2.530 (5) | C15—H15 | 0.9300 |
C1—N1 | 1.322 (6) | C16—C17 | 1.390 (7) |
C1—C2 | 1.396 (7) | C16—H16 | 0.9300 |
C1—H1 | 0.9300 | C17—C18 | 1.396 (6) |
C2—C3 | 1.371 (7) | C17—C20 | 1.499 (6) |
C2—H2 | 0.9300 | C18—C19 | 1.380 (6) |
C3—C4 | 1.400 (6) | C18—H18 | 0.9300 |
C3—H3 | 0.9300 | C19—H19 | 0.9300 |
C4—C12 | 1.415 (6) | C20—O1 | 1.216 (6) |
C4—C5 | 1.424 (6) | C20—O2 | 1.310 (6) |
C5—N3 | 1.370 (5) | C21—C22 | 1.388 (7) |
C5—C6 | 1.379 (6) | C21—C23iii | 1.392 (7) |
C6—N4 | 1.374 (6) | C21—H23 | 0.9300 |
C6—C7 | 1.436 (6) | C22—C23 | 1.388 (7) |
C7—C11 | 1.403 (6) | C22—H22 | 0.9300 |
C7—C8 | 1.410 (6) | C23—C21iii | 1.392 (7) |
C8—C9 | 1.366 (7) | C23—C24 | 1.494 (7) |
C8—H8 | 0.9300 | C24—O4 | 1.260 (6) |
C9—C10 | 1.388 (7) | C24—O3 | 1.261 (5) |
C9—H9 | 0.9300 | N3—H4 | 0.8600 |
C10—N2 | 1.320 (6) | O2—Zn1iv | 2.071 (3) |
C10—H10 | 0.9300 | O2—Zn1ii | 2.102 (3) |
C11—N2 | 1.358 (6) | O1—O2Wiv | 2.891 (9) |
C11—C12 | 1.455 (6) | O1W—O2Wv | 2.886 (14) |
C12—N1 | 1.352 (6) | O1W—N4 | 2.899 (10) |
O2i—Zn1—O2ii | 78.91 (13) | C4—C12—C11 | 120.6 (4) |
O2i—Zn1—N1 | 100.31 (14) | N4—C13—N3 | 111.6 (4) |
O2ii—Zn1—N1 | 101.54 (14) | N4—C13—C14 | 127.0 (4) |
O2i—Zn1—N2 | 171.64 (14) | N3—C13—C14 | 121.4 (4) |
O2ii—Zn1—N2 | 93.17 (14) | C19—C14—C15 | 118.3 (4) |
N1—Zn1—N2 | 78.50 (14) | C19—C14—C13 | 121.7 (4) |
O2i—Zn1—O4 | 90.24 (13) | C15—C14—C13 | 120.0 (4) |
O2ii—Zn1—O4 | 96.74 (13) | C16—C15—C14 | 121.4 (5) |
N1—Zn1—O4 | 160.32 (14) | C16—C15—H15 | 119.3 |
N2—Zn1—O4 | 93.37 (14) | C14—C15—H15 | 119.3 |
O2i—Zn1—O3 | 92.56 (13) | C15—C16—C17 | 120.2 (5) |
O2ii—Zn1—O3 | 155.21 (12) | C15—C16—H16 | 119.9 |
N1—Zn1—O3 | 102.89 (14) | C17—C16—H16 | 119.9 |
N2—Zn1—O3 | 95.77 (14) | C16—C17—C18 | 118.4 (4) |
O4—Zn1—O3 | 59.73 (13) | C16—C17—C20 | 119.3 (4) |
O2i—Zn1—C24 | 90.48 (14) | C18—C17—C20 | 122.3 (4) |
O2ii—Zn1—C24 | 126.02 (15) | C19—C18—C17 | 120.6 (4) |
N1—Zn1—C24 | 132.44 (16) | C19—C18—H18 | 119.7 |
N2—Zn1—C24 | 96.40 (15) | C17—C18—H18 | 119.7 |
O4—Zn1—C24 | 29.87 (14) | C18—C19—C14 | 121.0 (4) |
O3—Zn1—C24 | 29.89 (14) | C18—C19—H19 | 119.5 |
N1—C1—C2 | 122.6 (4) | C14—C19—H19 | 119.5 |
N1—C1—H1 | 118.7 | O1—C20—O2 | 124.2 (5) |
C2—C1—H1 | 118.7 | O1—C20—C17 | 120.2 (5) |
C3—C2—C1 | 119.6 (4) | O2—C20—C17 | 115.6 (4) |
C3—C2—H2 | 120.2 | C22—C21—C23iii | 120.2 (5) |
C1—C2—H2 | 120.2 | C22—C21—H23 | 119.9 |
C2—C3—C4 | 118.9 (4) | C23iii—C21—H23 | 119.9 |
C2—C3—H3 | 120.5 | C21—C22—C23 | 120.3 (5) |
C4—C3—H3 | 120.5 | C21—C22—H22 | 119.9 |
C3—C4—C12 | 118.2 (4) | C23—C22—H22 | 119.9 |
C3—C4—C5 | 126.3 (4) | C22—C23—C21iii | 119.5 (5) |
C12—C4—C5 | 115.5 (4) | C22—C23—C24 | 120.4 (4) |
N3—C5—C6 | 105.5 (4) | C21iii—C23—C24 | 120.0 (5) |
N3—C5—C4 | 129.5 (4) | O4—C24—O3 | 120.6 (4) |
C6—C5—C4 | 124.8 (4) | O4—C24—C23 | 120.1 (4) |
N4—C6—C5 | 110.1 (4) | O3—C24—C23 | 119.2 (5) |
N4—C6—C7 | 129.9 (4) | O4—C24—Zn1 | 59.6 (2) |
C5—C6—C7 | 120.0 (4) | O3—C24—Zn1 | 61.2 (2) |
C11—C7—C8 | 117.4 (4) | C23—C24—Zn1 | 174.0 (3) |
C11—C7—C6 | 117.2 (4) | C1—N1—C12 | 119.0 (4) |
C8—C7—C6 | 125.4 (4) | C1—N1—Zn1 | 127.1 (3) |
C9—C8—C7 | 119.3 (5) | C12—N1—Zn1 | 113.7 (3) |
C9—C8—H8 | 120.4 | C10—N2—C11 | 118.4 (4) |
C7—C8—H8 | 120.4 | C10—N2—Zn1 | 127.5 (3) |
C8—C9—C10 | 119.4 (5) | C11—N2—Zn1 | 113.5 (3) |
C8—C9—H9 | 120.3 | C13—N3—C5 | 107.5 (4) |
C10—C9—H9 | 120.3 | C13—N3—H4 | 126.2 |
N2—C10—C9 | 123.1 (5) | C5—N3—H4 | 126.2 |
N2—C10—H10 | 118.5 | C13—N4—C6 | 105.3 (4) |
C9—C10—H10 | 118.5 | C20—O2—Zn1iv | 132.2 (3) |
N2—C11—C7 | 122.4 (4) | C20—O2—Zn1ii | 125.3 (3) |
N2—C11—C12 | 115.9 (4) | Zn1iv—O2—Zn1ii | 101.09 (13) |
C7—C11—C12 | 121.8 (4) | C24—O3—Zn1 | 88.9 (3) |
N1—C12—C4 | 121.7 (4) | C24—O4—Zn1 | 90.6 (3) |
N1—C12—C11 | 117.7 (4) |
Symmetry codes: (i) x, y+1, z+1; (ii) −x+1, −y, −z; (iii) −x, −y+1, −z+2; (iv) x, y−1, z−1; (v) −x+1, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H4···O3v | 0.86 | 2.10 | 2.781 (5) | 136 |
Symmetry code: (v) −x+1, −y, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Zn2(C8H4O4)(C20H11N4O2)2]·4H2O |
Mr | 1037.54 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 9.7477 (16), 10.2610 (18), 11.0480 (19) |
α, β, γ (°) | 88.849 (3), 72.115 (4), 83.121 (3) |
V (Å3) | 1043.9 (3) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 1.23 |
Crystal size (mm) | 0.2 × 0.2 × 0.2 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2002) |
Tmin, Tmax | 0.782, 0.782 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5406, 3783, 2797 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.601 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.139, 1.02 |
No. of reflections | 3783 |
No. of parameters | 316 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.94, −0.66 |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H4···O3i | 0.86 | 2.10 | 2.781 (5) | 135.7 |
Symmetry code: (i) −x+1, −y, −z+1. |
Acknowledgements
The authors thank Jiangsu University for supporting this work.
References
Bruker (2002). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
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Coordination polymers with a variety of supramolecular structures have been studied extensively because of their novel topologies and potential applications as functional materials (Eddaoudi et al., 2001). 1,10-Phenanthroline (phen), as a common organic ligand, has been widely used in the construction of metal-organic coordination polymers (Chen & Liu, 2002). The phen derivative 4-(1H-1, 3, 7, 8-Tetraaza-cyclopenta [l]phenanthren-2-yl)-benzoic acid (HNCP) with both phenanthroline ring and carboxylate groups, is a good building block for construction of coordination polymers. Moreover, the long-conjugated system and the carboxylate groups are inclined to form π-π stacking interactions and hydrogen bonding interactions, which are important factors in the formation of supramolecular architectures. However, to date, only a handful of supramolecular architectures based on HNCP molecules have been described (Yongqin et al., 2007; Hsu et al., 2005). We selected benzene-1,4-dicarboxylic acid (1,4-BDC) as a linker and HNCP as a secondary ligand, generating a new coordination polymer, [Zn2(1,4-BDC)(NCP)2(H2O)4] (I), which is reported here.
In compound (I), the Zn atom is coordinated by two N atoms from one HNCP ligand, two O atoms from one 1,4-BDC ligand, and two O atoms from two different HNCP ligands in a distorted octahedral coordination (Fig. 1). The single unique 1,4-BDC species is generated from the atoms of the asymmetric unit by inversion. Two ZnII centers are bridged by the carboxylate groups of HNCP ligands to furnish a binuclear unit with a ZnII···ZnII distance of 3.2224 (9) Å. Neighbouring binuclear units are bridged by 1,4-BDC ligands, forming a single-chain structure. The neighboring single chains constructed by the 1,4-BDC ligand and the ZnII atoms are connected by the HNCP ligands from two opposite directions and result in a two-dimensional sheet (Fig. 2).
Even though the H atoms pertaining to water molecules could not be confidently found, and accordingly were not included in the model, the short O1···O2Wi 2.891 (9)Å; O1W···O2Wii 2.886 (14)Å; O1W···N4: 2.899 (10)Å distances, (i): x, -1+y, -1+z; (ii): 1-x,-y,1-z might indicate the formation of hydrogen bonds between these atoms.
Besides, there are hydrogen bonding interactions between adjacent layers. The imidazole nitrogen atoms of HNCP ligands act as hydrogen bond donors, while the carboxylate oxygen atoms of 1,4-BDC ligands from the neighboring layer act as hydrogen bond acceptors (N3—H···O3) (Table 1). As a result, these two-dimensional polymeric sheets are further extended into three-dimensional supramolecular structures through these hydrogen-bonding interactions(Fig. 3).