metal-organic compounds
cis-Diaquabis(2,2′,2′′-tripyridylamine)zinc(II) bis(perchlorate)
aJiangsu Key Lab of Organic Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, People's Republic of China
*Correspondence e-mail: iamswang@njupt.edu.cn
In the title compound, [Zn(2,2′,2′′-tpa)2(H2O)2](ClO4)2 (2,2′,2′′-tpa is 2,2′,2′′-tripyridylamine, C15H12N4), the Zn center lies on a twofold axis and is coordinated octahedrally by two water molecules and two bidentate 2,2′,2′′-tpa ligands. The perchlorate anions are linked to the coordinated water molecules in the complex cations via O—H⋯O hydrogen bonds.
Related literature
For general background, see: Liu et al. (1997). For related structures, see: Yang et al. (1999).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536809042688/nk2005sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809042688/nk2005Isup2.hkl
The ligand, 2,2',2''-tpa was synthesized according to the procedure described in the literature (Yang et al. (1999)).
A solution of 2,2',2''-tpa (62.11 mg, 0.2 mmol) in ethanol (5 ml) was added dropwise to a solution of Zn(ClO4)2.6H2O (46.58 mg, 0.1 mmol) in ethanol (2 ml). The mixture was stirred at room temperature for 5 min and then filtered. Colorless crystals of (I) suitable for X-ray analysis were obtained by slow evaporation of the filtrate.
H atoms of water molecule were located in difference Fourier maps and included in the subsequent
O–H distance restraints in the range 0.83 (2)–0.85 (4) Åwith Uiso(H)= 1.5Ueq(O). Aromatic H atoms were placed in calculated positions with C—H = 0.93 Å, and refined in riding mode with Uiso(H) = 1.2Ueq(C).
Luminescent organic and coordination compounds have been an active research area for decades because of their various potential applications in materials sciences. It has been demonstrated that 2,2'-dipyridylamine can produce a bright blue luminescence when deprotonated and bound to either an aluminium ion or a boron center (Liu et al., 1997). However, many of the previously reported aluminium or boron compounds based on 2,2'-dipyridylamine are not stable enough for electroluminescent devices. By using the neutral ligand, 2,2',2''-tripyridylamine, we report here the synthesis and
of the title compound, diaquabis(2,2',2''-tripyridylamine)zinc(II) bis(perchlorate).The structure consists of monomeric [Zn(2,2',2''-tpa)2(H2O)2]2+ cations and associated ClO4- anions. The Zn atom lies on a two fold axis. As shown in Fig. 1,the zinc center is six-coordinate with an octahedral geometry. In principle, 2,2',2''-tpa can function not only as a bidentate chelating ligand but also as a tridentate chelating ligand where all three pyridyl groups bind to the same central atom (Yang et al., 1999). In the title compound, each 2,2',2''-tpa ligand functions as a bidentate ligand, chelating to the zinc center. Two water molecules are coodinated to the zinc center as terminal ligands in a cis geometry. Crystals of the trans geometric isomer of I were not obtained.
The displacement parameters of the perchlorate anion are large. A disorder model has been tried but no improvement in
was observed.Coordinated water molecules in the complex cations are connected to ClO4- anions through O—H···O hydrogen bonds (Fig. 2).
For general background, see: Liu et al. (1997). For related structures, see: Yang et al. (1999). Scheme must show. 2ClO4
Data collection: SMART (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[Zn(C15H12N4)2(H2O)2](ClO4)2 | F(000) = 1632 |
Mr = 796.89 | Dx = 1.583 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 7889 reflections |
a = 18.687 (3) Å | θ = 2.2–27.9° |
b = 19.305 (4) Å | µ = 0.96 mm−1 |
c = 10.8910 (19) Å | T = 200 K |
β = 121.689 (3)° | Block, colorless |
V = 3343.2 (11) Å3 | 0.35 × 0.22 × 0.20 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 2940 independent reflections |
Radiation source: fine-focus sealed tube | 1861 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.068 |
Detector resolution: 8.366 pixels mm-1 | θmax = 25.0°, θmin = 2.1° |
phi and ω scans | h = −22→21 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | k = −18→22 |
Tmin = 0.775, Tmax = 0.825 | l = −12→12 |
7752 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)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.143 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.92 | w = 1/[σ2(Fo2) + (0.0705P)2] where P = (Fo2 + 2Fc2)/3 |
2940 reflections | (Δ/σ)max < 0.001 |
239 parameters | Δρmax = 0.86 e Å−3 |
2 restraints | Δρmin = −0.41 e Å−3 |
[Zn(C15H12N4)2(H2O)2](ClO4)2 | V = 3343.2 (11) Å3 |
Mr = 796.89 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 18.687 (3) Å | µ = 0.96 mm−1 |
b = 19.305 (4) Å | T = 200 K |
c = 10.8910 (19) Å | 0.35 × 0.22 × 0.20 mm |
β = 121.689 (3)° |
Bruker SMART CCD area-detector diffractometer | 2940 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1861 reflections with I > 2σ(I) |
Tmin = 0.775, Tmax = 0.825 | Rint = 0.068 |
7752 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 2 restraints |
wR(F2) = 0.143 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.92 | Δρmax = 0.86 e Å−3 |
2940 reflections | Δρmin = −0.41 e Å−3 |
239 parameters |
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 | ||
N1 | 0.5518 (2) | 0.28833 (19) | 0.9789 (4) | 0.0386 (9) | |
C1 | 0.5611 (3) | 0.2247 (2) | 1.0527 (5) | 0.0419 (12) | |
C2 | 0.5981 (3) | 0.2230 (3) | 1.1989 (5) | 0.0560 (15) | |
H2 | 0.6182 | 0.2634 | 1.2530 | 0.067* | |
C3 | 0.6054 (4) | 0.1604 (3) | 1.2652 (6) | 0.0726 (19) | |
H3 | 0.6305 | 0.1579 | 1.3648 | 0.087* | |
C4 | 0.5750 (4) | 0.1018 (3) | 1.1816 (7) | 0.0750 (19) | |
H4 | 0.5783 | 0.0591 | 1.2237 | 0.090* | |
C5 | 0.5400 (4) | 0.1072 (3) | 1.0366 (6) | 0.0612 (16) | |
H5 | 0.5209 | 0.0671 | 0.9811 | 0.073* | |
N2 | 0.5317 (2) | 0.16820 (19) | 0.9694 (4) | 0.0428 (10) | |
C6 | 0.6036 (3) | 0.2977 (2) | 0.9218 (5) | 0.0382 (11) | |
C7 | 0.6595 (3) | 0.3515 (3) | 0.9666 (5) | 0.0533 (14) | |
H7 | 0.6629 | 0.3836 | 1.0331 | 0.064* | |
C8 | 0.7103 (3) | 0.3570 (3) | 0.9116 (6) | 0.0670 (17) | |
H8 | 0.7474 | 0.3940 | 0.9378 | 0.080* | |
C9 | 0.7060 (3) | 0.3072 (3) | 0.8166 (6) | 0.0598 (16) | |
H9 | 0.7410 | 0.3096 | 0.7799 | 0.072* | |
C10 | 0.6500 (3) | 0.2550 (3) | 0.7783 (5) | 0.0455 (12) | |
H10 | 0.6476 | 0.2211 | 0.7155 | 0.055* | |
N3 | 0.5972 (2) | 0.25002 (18) | 0.8277 (4) | 0.0350 (9) | |
Zn1 | 0.5000 | 0.17445 (4) | 0.7500 | 0.0376 (3) | |
O1W | 0.4117 (3) | 0.0899 (2) | 0.7028 (5) | 0.0598 (10) | |
H1W | 0.387 (4) | 0.066 (3) | 0.626 (5) | 0.10 (3)* | |
H2W | 0.384 (4) | 0.088 (3) | 0.742 (6) | 0.10 (3)* | |
C11 | 0.5002 (3) | 0.3407 (2) | 0.9806 (5) | 0.0416 (12) | |
N4 | 0.4849 (3) | 0.3960 (2) | 0.8930 (4) | 0.0573 (12) | |
C12 | 0.4310 (3) | 0.4453 (3) | 0.8870 (6) | 0.0569 (15) | |
H12 | 0.4197 | 0.4841 | 0.8288 | 0.068* | |
C13 | 0.3930 (4) | 0.4387 (3) | 0.9659 (7) | 0.0664 (17) | |
H13 | 0.3549 | 0.4717 | 0.9595 | 0.080* | |
C14 | 0.4128 (4) | 0.3824 (3) | 1.0536 (6) | 0.0696 (17) | |
H14 | 0.3890 | 0.3776 | 1.1097 | 0.084* | |
C15 | 0.4662 (3) | 0.3336 (2) | 1.0602 (5) | 0.0494 (13) | |
H15 | 0.4790 | 0.2953 | 1.1200 | 0.059* | |
Cl1 | 0.79396 (8) | 0.44302 (7) | 0.37729 (14) | 0.0488 (4) | |
O2 | 0.8198 (5) | 0.3778 (3) | 0.3894 (6) | 0.200 (4) | |
O3 | 0.7209 (4) | 0.4465 (5) | 0.3674 (8) | 0.222 (4) | |
O4 | 0.8513 (5) | 0.4778 (3) | 0.4996 (5) | 0.159 (3) | |
O5 | 0.7854 (3) | 0.4721 (3) | 0.2524 (4) | 0.1048 (17) |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.048 (2) | 0.032 (2) | 0.036 (2) | 0.0059 (18) | 0.022 (2) | −0.0005 (17) |
C1 | 0.051 (3) | 0.040 (3) | 0.041 (3) | 0.015 (2) | 0.028 (3) | 0.008 (2) |
C2 | 0.071 (4) | 0.056 (4) | 0.044 (3) | 0.023 (3) | 0.032 (3) | 0.008 (3) |
C3 | 0.103 (5) | 0.078 (5) | 0.049 (4) | 0.027 (4) | 0.049 (4) | 0.018 (3) |
C4 | 0.119 (6) | 0.057 (4) | 0.074 (4) | 0.027 (4) | 0.067 (4) | 0.029 (3) |
C5 | 0.094 (5) | 0.040 (3) | 0.071 (4) | 0.012 (3) | 0.058 (4) | 0.014 (3) |
N2 | 0.060 (3) | 0.034 (2) | 0.048 (3) | 0.007 (2) | 0.037 (2) | 0.0080 (19) |
C6 | 0.034 (3) | 0.035 (3) | 0.033 (3) | 0.003 (2) | 0.009 (2) | 0.007 (2) |
C7 | 0.050 (3) | 0.047 (3) | 0.043 (3) | −0.003 (3) | 0.011 (3) | 0.002 (3) |
C8 | 0.041 (3) | 0.065 (4) | 0.067 (4) | −0.016 (3) | 0.009 (3) | 0.015 (3) |
C9 | 0.034 (3) | 0.076 (4) | 0.064 (4) | 0.002 (3) | 0.022 (3) | 0.024 (3) |
C10 | 0.045 (3) | 0.048 (3) | 0.046 (3) | 0.007 (3) | 0.027 (3) | 0.011 (2) |
N3 | 0.035 (2) | 0.033 (2) | 0.037 (2) | 0.0035 (17) | 0.0185 (19) | 0.0030 (17) |
Zn1 | 0.0483 (5) | 0.0296 (4) | 0.0440 (5) | 0.000 | 0.0307 (4) | 0.000 |
O1W | 0.077 (3) | 0.049 (3) | 0.071 (3) | −0.019 (2) | 0.051 (3) | −0.009 (2) |
C11 | 0.042 (3) | 0.034 (3) | 0.033 (3) | 0.009 (2) | 0.009 (2) | −0.002 (2) |
N4 | 0.054 (3) | 0.056 (3) | 0.048 (3) | 0.008 (2) | 0.018 (2) | −0.004 (2) |
C12 | 0.055 (4) | 0.049 (3) | 0.055 (4) | 0.015 (3) | 0.020 (3) | 0.005 (3) |
C13 | 0.071 (4) | 0.056 (4) | 0.078 (4) | 0.023 (3) | 0.044 (4) | 0.000 (3) |
C14 | 0.087 (5) | 0.069 (4) | 0.069 (4) | 0.017 (4) | 0.053 (4) | 0.006 (3) |
C15 | 0.074 (4) | 0.036 (3) | 0.044 (3) | 0.021 (3) | 0.035 (3) | 0.010 (2) |
Cl1 | 0.0522 (8) | 0.0533 (9) | 0.0487 (8) | 0.0061 (6) | 0.0319 (7) | 0.0047 (6) |
O2 | 0.349 (10) | 0.089 (4) | 0.096 (4) | 0.114 (6) | 0.070 (5) | 0.005 (3) |
O3 | 0.115 (5) | 0.399 (12) | 0.223 (8) | 0.073 (6) | 0.138 (6) | 0.137 (8) |
O4 | 0.281 (8) | 0.097 (4) | 0.063 (3) | −0.065 (5) | 0.066 (4) | −0.025 (3) |
O5 | 0.093 (3) | 0.166 (5) | 0.057 (3) | −0.016 (3) | 0.040 (3) | 0.027 (3) |
N1—C11 | 1.404 (5) | C10—H10 | 0.9300 |
N1—C6 | 1.411 (6) | N3—Zn1 | 2.128 (4) |
N1—C1 | 1.428 (5) | Zn1—N3i | 2.128 (4) |
C1—N2 | 1.338 (6) | Zn1—N2i | 2.142 (4) |
C1—C2 | 1.364 (6) | Zn1—O1W | 2.182 (4) |
C2—C3 | 1.376 (7) | Zn1—O1Wi | 2.182 (4) |
C2—H2 | 0.9300 | O1W—H1W | 0.85 (4) |
C3—C4 | 1.374 (8) | O1W—H2W | 0.83 (2) |
C3—H3 | 0.9300 | C11—C15 | 1.325 (6) |
C4—C5 | 1.359 (7) | C11—N4 | 1.358 (6) |
C4—H4 | 0.9300 | N4—C12 | 1.364 (6) |
C5—N2 | 1.352 (6) | C12—C13 | 1.379 (7) |
C5—H5 | 0.9300 | C12—H12 | 0.9300 |
N2—Zn1 | 2.142 (4) | C13—C14 | 1.364 (8) |
C6—N3 | 1.335 (5) | C13—H13 | 0.9300 |
C6—C7 | 1.368 (7) | C14—C15 | 1.346 (7) |
C7—C8 | 1.366 (7) | C14—H14 | 0.9300 |
C7—H7 | 0.9300 | C15—H15 | 0.9300 |
C8—C9 | 1.384 (8) | Cl1—O3 | 1.314 (5) |
C8—H8 | 0.9300 | Cl1—O2 | 1.330 (5) |
C9—C10 | 1.352 (7) | Cl1—O4 | 1.369 (5) |
C9—H9 | 0.9300 | Cl1—O5 | 1.401 (4) |
C10—N3 | 1.352 (5) | ||
C11—N1—C6 | 123.2 (4) | N3—Zn1—N2i | 99.25 (14) |
C11—N1—C1 | 119.6 (4) | N3i—Zn1—N2i | 85.21 (14) |
C6—N1—C1 | 116.7 (4) | N3—Zn1—N2 | 85.21 (14) |
N2—C1—C2 | 123.2 (5) | N3i—Zn1—N2 | 99.25 (14) |
N2—C1—N1 | 115.8 (4) | N2i—Zn1—N2 | 173.5 (2) |
C2—C1—N1 | 121.0 (5) | N3—Zn1—O1W | 171.28 (15) |
C1—C2—C3 | 118.9 (5) | N3i—Zn1—O1W | 92.16 (15) |
C1—C2—H2 | 120.6 | N2i—Zn1—O1W | 87.87 (16) |
C3—C2—H2 | 120.6 | N2—Zn1—O1W | 87.30 (16) |
C4—C3—C2 | 118.9 (5) | N3—Zn1—O1Wi | 92.16 (15) |
C4—C3—H3 | 120.6 | N3i—Zn1—O1Wi | 171.28 (15) |
C2—C3—H3 | 120.6 | N2i—Zn1—O1Wi | 87.30 (16) |
C5—C4—C3 | 119.0 (5) | N2—Zn1—O1Wi | 87.87 (16) |
C5—C4—H4 | 120.5 | O1W—Zn1—O1Wi | 83.1 (2) |
C3—C4—H4 | 120.5 | Zn1—O1W—H1W | 126 (4) |
N2—C5—C4 | 123.0 (5) | Zn1—O1W—H2W | 120 (5) |
N2—C5—H5 | 118.5 | H1W—O1W—H2W | 109 (6) |
C4—C5—H5 | 118.5 | C15—C11—N4 | 123.1 (4) |
C1—N2—C5 | 116.9 (4) | C15—C11—N1 | 120.2 (4) |
C1—N2—Zn1 | 119.0 (3) | N4—C11—N1 | 116.7 (4) |
C5—N2—Zn1 | 122.6 (3) | C11—N4—C12 | 117.4 (4) |
N3—C6—C7 | 122.7 (5) | N4—C12—C13 | 121.1 (5) |
N3—C6—N1 | 116.3 (4) | N4—C12—H12 | 119.5 |
C7—C6—N1 | 120.9 (5) | C13—C12—H12 | 119.5 |
C8—C7—C6 | 118.6 (5) | C14—C13—C12 | 118.0 (5) |
C8—C7—H7 | 120.7 | C14—C13—H13 | 121.0 |
C6—C7—H7 | 120.7 | C12—C13—H13 | 121.0 |
C7—C8—C9 | 119.5 (5) | C15—C14—C13 | 121.2 (5) |
C7—C8—H8 | 120.2 | C15—C14—H14 | 119.4 |
C9—C8—H8 | 120.2 | C13—C14—H14 | 119.4 |
C10—C9—C8 | 118.7 (5) | C11—C15—C14 | 119.3 (5) |
C10—C9—H9 | 120.6 | C11—C15—H15 | 120.4 |
C8—C9—H9 | 120.6 | C14—C15—H15 | 120.4 |
N3—C10—C9 | 122.5 (5) | O3—Cl1—O2 | 111.4 (6) |
N3—C10—H10 | 118.7 | O3—Cl1—O4 | 107.6 (5) |
C9—C10—H10 | 118.7 | O2—Cl1—O4 | 108.1 (4) |
C6—N3—C10 | 117.8 (4) | O3—Cl1—O5 | 108.4 (4) |
C6—N3—Zn1 | 119.5 (3) | O2—Cl1—O5 | 109.0 (4) |
C10—N3—Zn1 | 122.6 (3) | O4—Cl1—O5 | 112.4 (3) |
N3—Zn1—N3i | 93.45 (19) | ||
C11—N1—C1—N2 | 115.9 (5) | C9—C10—N3—Zn1 | 173.1 (4) |
C6—N1—C1—N2 | −71.3 (5) | C6—N3—Zn1—N3i | 56.2 (3) |
C11—N1—C1—C2 | −64.4 (6) | C10—N3—Zn1—N3i | −119.1 (4) |
C6—N1—C1—C2 | 108.4 (5) | C6—N3—Zn1—N2i | 141.9 (3) |
N2—C1—C2—C3 | −0.5 (8) | C10—N3—Zn1—N2i | −33.4 (4) |
N1—C1—C2—C3 | 179.8 (5) | C6—N3—Zn1—N2 | −42.8 (3) |
C1—C2—C3—C4 | −0.1 (9) | C10—N3—Zn1—N2 | 141.9 (4) |
C2—C3—C4—C5 | 1.1 (9) | C6—N3—Zn1—O1Wi | −130.5 (3) |
C3—C4—C5—N2 | −1.6 (9) | C10—N3—Zn1—O1Wi | 54.2 (4) |
C2—C1—N2—C5 | 0.1 (7) | C1—N2—Zn1—N3 | 30.8 (3) |
N1—C1—N2—C5 | 179.8 (4) | C5—N2—Zn1—N3 | −135.2 (4) |
C2—C1—N2—Zn1 | −166.8 (4) | C1—N2—Zn1—N3i | −61.9 (3) |
N1—C1—N2—Zn1 | 12.9 (5) | C5—N2—Zn1—N3i | 132.0 (4) |
C4—C5—N2—C1 | 1.0 (8) | C1—N2—Zn1—O1W | −153.6 (4) |
C4—C5—N2—Zn1 | 167.3 (4) | C5—N2—Zn1—O1W | 40.3 (4) |
C11—N1—C6—N3 | −129.6 (4) | C1—N2—Zn1—O1Wi | 123.2 (4) |
C1—N1—C6—N3 | 57.8 (5) | C5—N2—Zn1—O1Wi | −42.9 (4) |
C11—N1—C6—C7 | 53.0 (6) | C6—N1—C11—C15 | −166.6 (5) |
C1—N1—C6—C7 | −119.5 (5) | C1—N1—C11—C15 | 5.8 (7) |
N3—C6—C7—C8 | 0.7 (7) | C6—N1—C11—N4 | 16.3 (6) |
N1—C6—C7—C8 | 177.9 (4) | C1—N1—C11—N4 | −171.4 (4) |
C6—C7—C8—C9 | −2.2 (8) | C15—C11—N4—C12 | −0.8 (7) |
C7—C8—C9—C10 | 1.5 (8) | N1—C11—N4—C12 | 176.2 (4) |
C8—C9—C10—N3 | 0.9 (8) | C11—N4—C12—C13 | −0.7 (8) |
C7—C6—N3—C10 | 1.6 (7) | N4—C12—C13—C14 | 1.9 (9) |
N1—C6—N3—C10 | −175.7 (4) | C12—C13—C14—C15 | −1.7 (9) |
C7—C6—N3—Zn1 | −174.0 (3) | N4—C11—C15—C14 | 1.0 (8) |
N1—C6—N3—Zn1 | 8.7 (5) | N1—C11—C15—C14 | −175.9 (5) |
C9—C10—N3—C6 | −2.4 (7) | C13—C14—C15—C11 | 0.3 (9) |
Symmetry code: (i) −x+1, y, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O2ii | 0.93 | 2.43 | 3.336 (8) | 166 |
O1W—H2W···O5iii | 0.83 (2) | 2.23 (4) | 2.939 (6) | 143 (6) |
O1W—H1W···O4iv | 0.85 (4) | 2.07 (5) | 2.868 (6) | 158 (6) |
Symmetry codes: (ii) −x+3/2, −y+1/2, −z+2; (iii) x−1/2, −y+1/2, z+1/2; (iv) x−1/2, y−1/2, z. |
Experimental details
Crystal data | |
Chemical formula | [Zn(C15H12N4)2(H2O)2](ClO4)2 |
Mr | 796.89 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 200 |
a, b, c (Å) | 18.687 (3), 19.305 (4), 10.8910 (19) |
β (°) | 121.689 (3) |
V (Å3) | 3343.2 (11) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.96 |
Crystal size (mm) | 0.35 × 0.22 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.775, 0.825 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7752, 2940, 1861 |
Rint | 0.068 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.143, 0.92 |
No. of reflections | 2940 |
No. of parameters | 239 |
No. of restraints | 2 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.86, −0.41 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXTL (Sheldrick, 2008), DIAMOND (Brandenburg, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H2W···O5i | 0.83 (2) | 2.23 (4) | 2.939 (6) | 143 (6) |
O1W—H1W···O4ii | 0.85 (4) | 2.07 (5) | 2.868 (6) | 158 (6) |
Symmetry codes: (i) x−1/2, −y+1/2, z+1/2; (ii) x−1/2, y−1/2, z. |
Acknowledgements
This work was supported by grants NY208044, 09KJB150008 and in part by National Basic Research Program of China (2009CB930601) and grant TJ207035.
References
Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Bruker (2007). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Liu, W., Hassan, A. & Wang, S. (1997). Organometallics, 16, 4257–4259. CSD CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Yang, W., Schmider, H., Wu, Q., Zhang, Y. & Wang, S. (1999). Inorg. Chem. 39, 2397–2404. Web of Science CSD CrossRef Google Scholar
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Luminescent organic and coordination compounds have been an active research area for decades because of their various potential applications in materials sciences. It has been demonstrated that 2,2'-dipyridylamine can produce a bright blue luminescence when deprotonated and bound to either an aluminium ion or a boron center (Liu et al., 1997). However, many of the previously reported aluminium or boron compounds based on 2,2'-dipyridylamine are not stable enough for electroluminescent devices. By using the neutral ligand, 2,2',2''-tripyridylamine, we report here the synthesis and crystal structure of the title compound, diaquabis(2,2',2''-tripyridylamine)zinc(II) bis(perchlorate).
The structure consists of monomeric [Zn(2,2',2''-tpa)2(H2O)2]2+ cations and associated ClO4- anions. The Zn atom lies on a two fold axis. As shown in Fig. 1,the zinc center is six-coordinate with an octahedral geometry. In principle, 2,2',2''-tpa can function not only as a bidentate chelating ligand but also as a tridentate chelating ligand where all three pyridyl groups bind to the same central atom (Yang et al., 1999). In the title compound, each 2,2',2''-tpa ligand functions as a bidentate ligand, chelating to the zinc center. Two water molecules are coodinated to the zinc center as terminal ligands in a cis geometry. Crystals of the trans geometric isomer of I were not obtained.
The displacement parameters of the perchlorate anion are large. A disorder model has been tried but no improvement in refinement was observed.
Coordinated water molecules in the complex cations are connected to ClO4- anions through O—H···O hydrogen bonds (Fig. 2).