Download citation
Download citation
link to html
The title compound, [Zn(C12H8N2)3][Cr2O7]·4H2O, was obtained by mixing 1,10-phenanthroline (phen), potassium chromate and zinc sulfate solutions. The asymmetric unit is composed of a [Zn(phen)3]2+ cation, a Cr2O72− anion and four water mol­ecules. The ZnII ion is in a distorted octahedral environment, coordinated by six N atoms from three phen mol­ecules. The cations are connected to anions by weak C—H...O hydrogen bonds, with shortest H...O distances of ca 2.27–2.33 Å. The Cr2O72− anion is in a staggered conformation. Two of the four crystallographically independent water mol­ecules are ordered, and two others are disordered, each over two sites.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536802006402/bt6130sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536802006402/bt6130Isup2.hkl
Contains datablock I

CCDC reference: 164033

Key indicators

  • Single-crystal X-ray study
  • T = 293 K
  • Mean [sigma](C-C) = 0.007 Å
  • H-atom completeness 76%
  • Disorder in solvent or counterion
  • R factor = 0.047
  • wR factor = 0.177
  • Data-to-parameter ratio = 13.5

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


Yellow Alert Alert Level C:
PLAT_302 Alert C Anion/Solvent Disorder ....................... 13.00 Perc. PLAT_710 Alert C Delete 1-2-3 or 2-3-4 (CIF) Linear Torsion Angle # 19 N2B -ZN1 -N2A -C12A 129.80 0.80 1.555 1.555 1.555 1.555 PLAT_710 Alert C Delete 1-2-3 or 2-3-4 (CIF) Linear Torsion Angle # 24 N2B -ZN1 -N2A -C9A -54.50 0.90 1.555 1.555 1.555 1.555 PLAT_710 Alert C Delete 1-2-3 or 2-3-4 (CIF) Linear Torsion Angle # 39 N2A -ZN1 -N2B -C12B 116.50 0.80 1.555 1.555 1.555 1.555 PLAT_710 Alert C Delete 1-2-3 or 2-3-4 (CIF) Linear Torsion Angle # 44 N2A -ZN1 -N2B -C9B -67.70 0.90 1.555 1.555 1.555 1.555 General Notes
FORMU_01 There is a discrepancy between the atom counts in the _chemical_formula_sum and the formula from the _atom_site* data. Atom count from _chemical_formula_sum:C36 H32 Cr2 N6 O11 Zn1 Atom count from the _atom_site data: C36 H24 Cr2 N6 O11 Zn1 CELLZ_01 From the CIF: _cell_formula_units_Z 8 From the CIF: _chemical_formula_sum C36 H32 Cr2 N6 O11 Zn TEST: Compare cell contents of formula and atom_site data atom Z*formula cif sites diff C 288.00 288.00 0.00 H 256.00 192.00 64.00 Cr 16.00 16.00 0.00 N 48.00 48.00 0.00 O 88.00 88.00 0.00 Zn 8.00 8.00 0.00 Difference between formula and atom_site contents detected. WARNING: H atoms missing from atom site list. Is this intentional?
0 Alert Level A = Potentially serious problem
0 Alert Level B = Potential problem
5 Alert Level C = Please check

Comment top

Metal complexes containing the chromate(VI) or dichromate(VI) anion, CrO42- or Cr2O72-, as a ligand are attracting current attention due to their spectroscopic (Cieślak-Golonka et al., 1988, 1991), structural (Dave & Czeruszewicz, 1994), magnetic (Gili & Lorenzo-Luis, 1999), thermal (Bensch et al., 1987; Repka et al., 1998), catalytic (Bensch et al., 1987), and supramolecular (Hayashi et al., 1998) properties.

Chromate(VI) and dichromate(VI) complexes have been long recognized to cause genotoxic and mutagenic effects in living cells, leading to development of cancer in humans (Cieślak-Golonka, 1995). Considering the redox pathways of the carcinogenic CrVI anion and the interaction of its metabolites CrV, CrIV and CrIII with DNA (Stearns & Wetterhahn, 1997; Lay & Levina, 1998; Codd & Lay, 1999), the lowering of its mutagenic activity was explained by the mode of the chromate ion binding to the metal–organic ligand core. Metal chromate(VI) complexes with 1,10-phenanthroline or 2,2'-bipyridyl tested by the standard Ames test exhibited markedly lower activity than the reference compounds potassium dichromate and potassium chromate (Szyba et al., 1992).

Because the observed carcinogenecity of CrVI depends on the ability of its oxoanions to cross the cell membrane by the anion-transport system, the symmetry of the forming CrVI species may influence the effectivity of the membrane crossing. The coordination chemistry of compounds with chromium(VI) anions (chromates, dichromates, polychromates, etc.) as ligands has been reviewed recently (Gili & Lorenzo-Luis, 1999). In the nickel(II) chromate complexes with 2,2'-bipyridine (bpy), viz. Ni(CrO4)(bpy)x, where x = 2 or 3, the mode of coordination of the chromate ion (non- or one-coordinating anion) was found to be dependent on the Ni:bpy ratio (Bronowska et al., 2000).

We were trying to obtain a complex in which the chromate ions would be coordinated to the Zn metal, similar to in case of [Mn2(Cr2O7)2(bpy)4] (Dave & Czeruszewicz, 1994). Instead of the dichromate bonded to the ZnII ion, an ionic structure, (I), built up of [Zn(phen)3]2+ cations, Cr2O72- anions and water molecules was obtained.

The perspective view of the [Zn(phen)3]2+ cation with the atomic labelling scheme is presented in Fig. 1 and the packing diagram of [Zn(phen)3][Cr2O7]·4H2O is shown in Fig. 2. The cations are connected to anions by weak C—H···O hydrogen bonds, with shortest H···O distances of ca 2.27–2.33 Å. The ZnII ion is in distorted octahedral environment coordinated with six N atoms from three phenanthroline molecules. The Zn–N bond lengths are in the range 2.115 (4)–2.215 (4) Å. The N—Zn—N angles involving the same phenanthroline molecule are in the range 75.7 (1)–78.2 (1)°, and are significantly smaller than the octahedral value of 90°. The N—Zn—N angles cis to each other comprising N atoms from different phenanthroline molecules are in the range 90.1 (1)–104.1 (1)°, wheras those trans to each other are in the range 164.5 (1)–170.7 (1)°.

There is one Cr2O72- anion in the independent part of the unit cell. It is almost in a staggered conformation, opposite to the situation found in K2Cr2O7. In potassium dichromate, two CrO42- tetrahedra are in a nearly eclipsed conformation (Lőfgren, 1971), when viewed along the line joining the Cr atoms. The O—Cr—O bond angles in (I) are between 106.9 (2) and 112.2 (2)°, close to the tetraedral value of 109.28°. The Cr—O—Cr bridging angle is 130.4 (2)°. The O—Cr—O—Cr torsion angles are close to ca 24°. The Cr—O terminal bond lengths are in the range 1.592 (4)–1.609 (3)Åand the bridging Cr—O bonds are longer and in the range 1.758 (4)–1.791 (3) Å.

There are four crystallographically independent water molecules in the structure. Two are ordered and the remaining two are disordered over two sites each. We refined the occupancy factors of the disordered molecules. They converged close to 0.5 and were subsequently fixed at that value. The O atoms of the water molecules are separated by 2.96–3.05 Å and are connected to each other and to dichromate anions by O—H···O hydrogen bonds, forming chains parallel to the a direction, separating the [Zn(phen)3]2+ cations.

Experimental top

The title complex was synthesized by adding stoichiometric amounts of 1,10-phenanthroline in acetone (0.75 M) to K2CrO4 in water (0.25 M), followed by the addition of ZnSO4 (0.25 M). The yellow–orange reaction mixture was allowed to stand for a few days at room temperature. The precipitated orange microcrystals were of X-ray quality and were filtered off, washed with water and acetone, and dried.

Computing details top

Data collection: KM-4 Software (Kuma, 1998); cell refinement: KM-4 Software; data reduction: KM-4 Software; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Sheldrick, 1990); software used to prepare material for publication: SHELXL97.

Figures top
[Figure 1] Fig. 1. The molecular structure of the complex cation of (I) showing the atomic labeling scheme. Displacement ellipsoids are at the 50% probability level.
[Figure 2] Fig. 2. Packing diagram of tris(1,10-phenanthroline)zinc(II) dichromate tetrahydrate.
(I) top
Crystal data top
[Zn(C12H8N2)3][Cr2O7]·4H2OF(000) = 3648
Mr = 894.05Dx = 1.485 Mg m3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
a = 26.687 (5) ÅCell parameters from 36 reflections
b = 17.867 (4) Åθ = 10–15°
c = 17.471 (3) ŵ = 1.19 mm1
β = 106.23 (3)°T = 293 K
V = 7998 (3) Å3Plate, orange
Z = 80.63 × 0.50 × 0.37 mm
Data collection top
Kuma KM-4
diffractometer
4863 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.024
Graphite monochromatorθmax = 25.1°, θmin = 2.0°
ωθ scansh = 3031
Absorption correction: ψ scans
empirical (using intensity measurements) via ψ scans (Sheldrick, 1990)
k = 1821
Tmin = 0.493, Tmax = 0.643l = 200
9494 measured reflections2 standard reflections every 50 reflections
7062 independent reflections intensity decay: 6.2%
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.047Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.177H-atom parameters constrained
S = 1.05 w = 1/[σ2(Fo2) + (0.1234P)2 + 2.6927P]
where P = (Fo2 + 2Fc2)/3
7062 reflections(Δ/σ)max = 0.002
523 parametersΔρmax = 0.78 e Å3
0 restraintsΔρmin = 0.38 e Å3
Crystal data top
[Zn(C12H8N2)3][Cr2O7]·4H2OV = 7998 (3) Å3
Mr = 894.05Z = 8
Monoclinic, C2/cMo Kα radiation
a = 26.687 (5) ŵ = 1.19 mm1
b = 17.867 (4) ÅT = 293 K
c = 17.471 (3) Å0.63 × 0.50 × 0.37 mm
β = 106.23 (3)°
Data collection top
Kuma KM-4
diffractometer
4863 reflections with I > 2σ(I)
Absorption correction: ψ scans
empirical (using intensity measurements) via ψ scans (Sheldrick, 1990)
Rint = 0.024
Tmin = 0.493, Tmax = 0.6432 standard reflections every 50 reflections
9494 measured reflections intensity decay: 6.2%
7062 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0470 restraints
wR(F2) = 0.177H-atom parameters constrained
S = 1.05Δρmax = 0.78 e Å3
7062 reflectionsΔρmin = 0.38 e Å3
523 parameters
Special details top

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 (Å2) top
xyzUiso*/UeqOcc. (<1)
Zn10.133759 (18)0.17085 (3)0.15369 (3)0.04417 (17)
Cr10.32526 (3)0.05375 (4)0.34666 (4)0.0533 (2)
Cr20.22544 (3)0.13131 (4)0.31004 (4)0.0483 (2)
O10.37010 (19)0.0475 (3)0.2642 (2)0.1063 (16)
O20.2934 (2)0.0218 (2)0.3633 (3)0.0991 (15)
O30.34845 (16)0.0686 (2)0.4207 (2)0.0763 (10)
O40.28432 (14)0.1291 (2)0.3401 (2)0.0670 (9)
O50.23087 (16)0.0774 (2)0.2344 (2)0.0779 (11)
O60.21705 (17)0.2160 (2)0.2872 (3)0.0819 (11)
O70.17735 (15)0.1046 (2)0.3814 (2)0.0744 (10)
N1A0.15558 (13)0.27106 (19)0.10435 (18)0.0435 (8)
N2A0.16413 (13)0.12892 (19)0.06091 (19)0.0440 (8)
N1B0.19952 (13)0.1454 (2)0.2502 (2)0.0452 (8)
N2B0.11402 (14)0.2248 (2)0.2517 (2)0.0505 (9)
N1C0.05443 (14)0.1798 (2)0.0727 (2)0.0504 (9)
N2C0.09575 (14)0.0642 (2)0.1702 (2)0.0497 (8)
C1A0.15247 (19)0.3409 (3)0.1272 (3)0.0563 (11)
H1A0.14520.34940.17720.080*
C2A0.1603 (2)0.4021 (3)0.0836 (3)0.0692 (14)
H2A0.15670.45200.10180.080*
C3A0.1716 (2)0.3902 (3)0.0131 (3)0.0671 (13)
H3A0.17680.43190.01850.080*
C4A0.17623 (17)0.3173 (3)0.0128 (3)0.0525 (11)
C5A0.16782 (15)0.2594 (2)0.0349 (2)0.0421 (9)
C6A0.1902 (2)0.2996 (3)0.0845 (3)0.0622 (12)
H6A0.19570.33950.11800.080*
C7A0.1960 (2)0.2294 (3)0.1044 (3)0.0658 (14)
H7A0.20550.21900.15240.080*
C8A0.18789 (16)0.1675 (3)0.0569 (2)0.0516 (11)
C9A0.17283 (15)0.1829 (2)0.0124 (2)0.0415 (9)
C10A0.19516 (19)0.0923 (3)0.0734 (3)0.0616 (12)
H10A0.20470.07890.12070.080*
C11A0.1879 (2)0.0391 (3)0.0234 (3)0.0653 (13)
H11A0.19430.01230.03320.080*
C12A0.17215 (18)0.0587 (2)0.0434 (3)0.0512 (10)
H12A0.16660.01990.07810.080*
C1B0.24200 (18)0.1087 (3)0.2486 (3)0.0552 (11)
H1B0.24620.09480.19770.080*
C2B0.2809 (2)0.0892 (3)0.3179 (3)0.0675 (14)
H2B0.31150.06290.31430.080*
C3B0.2749 (2)0.1084 (3)0.3895 (3)0.0684 (14)
H3B0.30110.09510.43760.080*
C4B0.2306 (2)0.1471 (3)0.3941 (3)0.0583 (12)
C5B0.19368 (17)0.1661 (2)0.3222 (2)0.0456 (9)
C6B0.2204 (3)0.1691 (3)0.4678 (3)0.0774 (17)
H6B0.24440.15370.51730.080*
C7B0.1792 (3)0.2092 (3)0.4685 (3)0.0742 (16)
H7B0.17470.22460.51880.080*
C8B0.1408 (2)0.2302 (3)0.3956 (3)0.0595 (12)
C9B0.14864 (18)0.2076 (2)0.3238 (2)0.0488 (10)
C10B0.0979 (2)0.2751 (3)0.3919 (3)0.0692 (14)
H10B0.09210.29340.44040.080*
C11B0.0644 (2)0.2941 (3)0.3204 (4)0.0731 (15)
H11B0.03470.32560.31740.080*
C12B0.07336 (19)0.2665 (3)0.2515 (3)0.0659 (13)
H12B0.04890.27780.20100.080*
C1C0.0352 (2)0.2341 (3)0.0215 (3)0.0617 (12)
H1C0.05710.27590.01850.080*
C2C0.0165 (2)0.2326 (3)0.0290 (3)0.0710 (14)
H2C0.02910.27260.06600.080*
C3C0.0474 (2)0.1752 (3)0.0246 (3)0.0681 (14)
H3C0.08260.17430.05840.080*
C4C0.02889 (18)0.1173 (3)0.0283 (3)0.0597 (12)
C5C0.02332 (16)0.1203 (3)0.0762 (2)0.0479 (10)
C6C0.0594 (2)0.0541 (4)0.0357 (4)0.0762 (16)
H6C0.09550.05240.00590.080*
C7C0.0394 (2)0.0010 (4)0.0851 (4)0.0794 (17)
H7C0.06130.04300.08780.080*
C8C0.01386 (19)0.0015 (3)0.1328 (3)0.0617 (12)
C9C0.04481 (17)0.0609 (3)0.1287 (3)0.0505 (10)
C10C0.0374 (2)0.0605 (3)0.1824 (3)0.0714 (15)
H10C0.01740.10410.18730.080*
C11C0.0883 (2)0.0559 (3)0.2233 (3)0.0692 (14)
H11C0.10510.09610.25740.080*
C12C0.1163 (2)0.0077 (3)0.2159 (3)0.0611 (12)
H12C0.15230.01110.24590.080*
O80.1143 (2)0.2743 (4)0.3093 (4)0.158 (3)
O90.0498 (4)0.2288 (5)0.2041 (6)0.214 (4)
O100.4170 (5)0.0799 (7)0.1507 (10)0.159 (5)0.50
O110.4309 (6)0.0529 (9)0.4847 (12)0.196 (7)0.50
O120.0299 (6)0.3759 (9)0.1288 (11)0.180 (6)0.50
O130.4687 (6)0.0857 (9)0.1411 (14)0.228 (8)0.50
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Zn10.0451 (3)0.0529 (3)0.0355 (3)0.0008 (2)0.0130 (2)0.0031 (2)
Cr10.0588 (5)0.0584 (5)0.0478 (4)0.0056 (3)0.0233 (3)0.0111 (3)
Cr20.0584 (4)0.0495 (4)0.0413 (4)0.0018 (3)0.0207 (3)0.0054 (3)
O10.104 (3)0.142 (4)0.060 (2)0.040 (3)0.001 (2)0.017 (2)
O20.126 (4)0.072 (3)0.126 (4)0.033 (3)0.080 (3)0.033 (3)
O30.085 (3)0.086 (3)0.073 (2)0.006 (2)0.047 (2)0.0069 (19)
O40.072 (2)0.067 (2)0.072 (2)0.0017 (17)0.0366 (18)0.0017 (17)
O50.087 (3)0.100 (3)0.0529 (19)0.005 (2)0.0294 (19)0.0182 (19)
O60.097 (3)0.056 (2)0.105 (3)0.0055 (19)0.049 (2)0.024 (2)
O70.077 (2)0.085 (3)0.0555 (19)0.013 (2)0.0085 (17)0.0068 (18)
N1A0.0467 (19)0.0469 (19)0.0367 (17)0.0023 (15)0.0112 (14)0.0056 (14)
N2A0.0450 (19)0.046 (2)0.0384 (17)0.0022 (15)0.0082 (15)0.0006 (14)
N1B0.0479 (19)0.0492 (19)0.0388 (17)0.0056 (16)0.0126 (15)0.0034 (15)
N2B0.049 (2)0.062 (2)0.0449 (19)0.0022 (17)0.0194 (16)0.0022 (16)
N1C0.0451 (19)0.058 (2)0.048 (2)0.0015 (17)0.0133 (16)0.0036 (17)
N2C0.047 (2)0.056 (2)0.0473 (19)0.0045 (17)0.0153 (16)0.0037 (16)
C1A0.062 (3)0.057 (3)0.052 (2)0.007 (2)0.020 (2)0.008 (2)
C2A0.079 (4)0.045 (3)0.080 (4)0.007 (2)0.017 (3)0.005 (2)
C3A0.081 (4)0.049 (3)0.070 (3)0.007 (2)0.020 (3)0.014 (2)
C4A0.051 (2)0.057 (3)0.046 (2)0.007 (2)0.0098 (19)0.0095 (19)
C5A0.038 (2)0.050 (2)0.0369 (19)0.0034 (17)0.0069 (16)0.0036 (17)
C6A0.067 (3)0.080 (3)0.044 (2)0.006 (3)0.022 (2)0.014 (2)
C7A0.060 (3)0.104 (4)0.038 (2)0.007 (3)0.020 (2)0.003 (3)
C8A0.042 (2)0.075 (3)0.038 (2)0.002 (2)0.0112 (17)0.008 (2)
C9A0.038 (2)0.055 (2)0.0305 (18)0.0012 (17)0.0074 (16)0.0007 (16)
C10A0.058 (3)0.080 (4)0.049 (2)0.000 (2)0.017 (2)0.019 (2)
C11A0.059 (3)0.068 (3)0.069 (3)0.003 (2)0.017 (2)0.022 (3)
C12A0.056 (3)0.045 (2)0.052 (2)0.0005 (19)0.015 (2)0.0028 (19)
C1B0.052 (3)0.057 (3)0.056 (3)0.002 (2)0.013 (2)0.001 (2)
C2B0.057 (3)0.060 (3)0.077 (4)0.004 (2)0.004 (3)0.013 (3)
C3B0.070 (3)0.057 (3)0.063 (3)0.002 (3)0.007 (3)0.009 (2)
C4B0.074 (3)0.049 (3)0.044 (2)0.015 (2)0.004 (2)0.005 (2)
C5B0.053 (2)0.044 (2)0.039 (2)0.0113 (19)0.0114 (18)0.0060 (17)
C6B0.108 (5)0.072 (4)0.041 (3)0.020 (3)0.003 (3)0.005 (2)
C7B0.113 (5)0.071 (4)0.038 (2)0.015 (3)0.020 (3)0.002 (2)
C8B0.086 (3)0.055 (3)0.044 (2)0.022 (3)0.030 (2)0.006 (2)
C9B0.061 (3)0.049 (2)0.040 (2)0.017 (2)0.0195 (19)0.0001 (18)
C10B0.089 (4)0.069 (3)0.065 (3)0.019 (3)0.047 (3)0.020 (3)
C11B0.061 (3)0.083 (4)0.085 (4)0.001 (3)0.037 (3)0.018 (3)
C12B0.054 (3)0.081 (4)0.066 (3)0.002 (3)0.022 (2)0.005 (3)
C1C0.058 (3)0.071 (3)0.052 (3)0.006 (2)0.008 (2)0.011 (2)
C2C0.060 (3)0.087 (4)0.058 (3)0.014 (3)0.003 (2)0.003 (3)
C3C0.050 (3)0.089 (4)0.058 (3)0.011 (3)0.003 (2)0.011 (3)
C4C0.046 (2)0.079 (3)0.056 (3)0.003 (2)0.016 (2)0.019 (2)
C5C0.043 (2)0.058 (3)0.045 (2)0.0001 (19)0.0159 (18)0.0105 (19)
C6C0.048 (3)0.091 (4)0.084 (4)0.014 (3)0.010 (3)0.015 (3)
C7C0.059 (3)0.095 (5)0.089 (4)0.034 (3)0.027 (3)0.026 (4)
C8C0.065 (3)0.067 (3)0.062 (3)0.016 (2)0.032 (2)0.012 (2)
C9C0.048 (2)0.060 (3)0.048 (2)0.008 (2)0.0212 (19)0.012 (2)
C10C0.081 (4)0.069 (3)0.074 (3)0.021 (3)0.037 (3)0.002 (3)
C11C0.080 (4)0.059 (3)0.077 (3)0.002 (3)0.036 (3)0.010 (2)
C12C0.065 (3)0.062 (3)0.059 (3)0.001 (2)0.021 (2)0.009 (2)
O80.090 (4)0.165 (6)0.186 (6)0.015 (4)0.017 (4)0.049 (5)
O90.174 (7)0.199 (8)0.274 (10)0.011 (6)0.069 (7)0.028 (7)
O100.096 (7)0.120 (8)0.252 (13)0.024 (6)0.034 (8)0.003 (9)
O110.141 (9)0.200 (12)0.309 (15)0.043 (8)0.167 (10)0.121 (11)
O120.159 (11)0.166 (11)0.210 (13)0.035 (9)0.044 (10)0.035 (10)
O130.124 (10)0.165 (12)0.356 (17)0.004 (9)0.004 (11)0.103 (12)
Geometric parameters (Å, º) top
Zn1—N1B2.115 (4)C5A—C9A1.439 (6)
Zn1—N1A2.137 (3)C6A—C7A1.323 (8)
Zn1—N2A2.140 (3)C7A—C8A1.435 (7)
Zn1—N2B2.155 (4)C8A—C10A1.399 (7)
Zn1—N1C2.199 (4)C8A—C9A1.404 (6)
Zn1—N2C2.215 (4)C10A—C11A1.342 (7)
Cr1—O21.579 (4)C11A—C12A1.390 (7)
Cr1—O11.599 (4)C1B—C2B1.402 (7)
Cr1—O31.605 (3)C2B—C3B1.348 (8)
Cr1—O41.758 (4)C3B—C4B1.392 (8)
Cr2—O71.592 (4)C4B—C5B1.404 (6)
Cr2—O61.596 (4)C4B—C6B1.441 (8)
Cr2—O51.609 (3)C5B—C9B1.419 (7)
Cr2—O41.791 (3)C6B—C7B1.316 (9)
N1A—C1A1.320 (6)C7B—C8B1.445 (8)
N1A—C5A1.358 (5)C8B—C10B1.385 (8)
N2A—C12A1.323 (5)C8B—C9B1.388 (6)
N2A—C9A1.346 (5)C10B—C11B1.361 (8)
N1B—C1B1.316 (6)C11B—C12B1.383 (7)
N1B—C5B1.362 (5)C1C—C2C1.415 (7)
N2B—C12B1.315 (6)C2C—C3C1.330 (8)
N2B—C9B1.372 (6)C3C—C4C1.384 (7)
N1C—C1C1.322 (6)C4C—C5C1.411 (6)
N1C—C5C1.361 (6)C4C—C6C1.418 (8)
N2C—C12C1.310 (6)C5C—C9C1.415 (6)
N2C—C9C1.351 (6)C6C—C7C1.320 (8)
C1A—C2A1.380 (7)C7C—C8C1.434 (8)
C2A—C3A1.365 (8)C8C—C10C1.398 (8)
C3A—C4A1.396 (7)C8C—C9C1.401 (6)
C4A—C5A1.386 (6)C10C—C11C1.348 (8)
C4A—C6A1.438 (7)C11C—C12C1.385 (7)
N1B—Zn1—N1A104.0 (1)N1A—C5A—C9A117.0 (3)
N1B—Zn1—N2A97.0 (1)C4A—C5A—C9A120.1 (4)
N1A—Zn1—N2A77.5 (1)C7A—C6A—C4A121.0 (4)
N1B—Zn1—N2B78.2 (1)C6A—C7A—C8A122.1 (4)
N1A—Zn1—N2B95.8 (1)C10A—C8A—C9A117.1 (4)
N2A—Zn1—N2B170.7 (1)C10A—C8A—C7A124.6 (4)
N1B—Zn1—N1C164.5 (1)C9A—C8A—C7A118.3 (4)
N1A—Zn1—N1C90.1 (1)N2A—C9A—C8A122.9 (4)
N2A—Zn1—N1C92.2 (1)N2A—C9A—C5A117.6 (3)
N2B—Zn1—N1C94.2 (1)C8A—C9A—C5A119.5 (4)
N1B—Zn1—N2C91.1 (1)C11A—C10A—C8A119.4 (4)
N1A—Zn1—N2C163.6 (1)C10A—C11A—C12A120.1 (5)
N2A—Zn1—N2C94.7 (1)N2A—C12A—C11A122.6 (4)
N2B—Zn1—N2C93.4 (1)N1B—C1B—C2B122.6 (5)
N1C—Zn1—N2C75.7 (1)C3B—C2B—C1B119.2 (5)
O2—Cr1—O1109.6 (3)C2B—C3B—C4B120.2 (5)
O2—Cr1—O3107.6 (2)C3B—C4B—C5B117.5 (5)
O1—Cr1—O3112.2 (2)C3B—C4B—C6B124.2 (5)
O2—Cr1—O4110.7 (2)C5B—C4B—C6B118.3 (5)
O1—Cr1—O4108.5 (2)N1B—C5B—C4B121.9 (4)
O3—Cr1—O4108.2 (2)N1B—C5B—C9B118.4 (4)
O7—Cr2—O6110.0 (2)C4B—C5B—C9B119.7 (4)
O7—Cr2—O5109.3 (2)C7B—C6B—C4B121.6 (5)
O6—Cr2—O5110.4 (2)C6B—C7B—C8B121.5 (5)
O7—Cr2—O4110.2 (2)C10B—C8B—C9B117.3 (5)
O6—Cr2—O4106.9 (2)C10B—C8B—C7B124.4 (5)
O5—Cr2—O4110.1 (2)C9B—C8B—C7B118.2 (5)
Cr1—O4—Cr2130.4 (2)N2B—C9B—C8B122.1 (4)
C1A—N1A—C5A117.8 (4)N2B—C9B—C5B117.1 (4)
C1A—N1A—Zn1128.6 (3)C8B—C9B—C5B120.8 (4)
C5A—N1A—Zn1113.1 (3)C11B—C10B—C8B120.6 (5)
C12A—N2A—C9A117.8 (4)C10B—C11B—C12B118.7 (5)
C12A—N2A—Zn1128.8 (3)N2B—C12B—C11B122.9 (5)
C9A—N2A—Zn1113.2 (3)N1C—C1C—C2C122.3 (5)
C1B—N1B—C5B118.5 (4)C3C—C2C—C1C119.4 (5)
C1B—N1B—Zn1128.1 (3)C2C—C3C—C4C120.2 (5)
C5B—N1B—Zn1113.2 (3)C3C—C4C—C5C118.5 (5)
C12B—N2B—C9B118.2 (4)C3C—C4C—C6C123.3 (5)
C12B—N2B—Zn1129.5 (3)C5C—C4C—C6C118.2 (5)
C9B—N2B—Zn1112.2 (3)N1C—C5C—C4C121.1 (4)
C1C—N1C—C5C118.5 (4)N1C—C5C—C9C118.3 (4)
C1C—N1C—Zn1127.7 (3)C4C—C5C—C9C120.6 (4)
C5C—N1C—Zn1113.8 (3)C7C—C6C—C4C121.1 (5)
C12C—N2C—C9C118.6 (4)C6C—C7C—C8C122.5 (5)
C12C—N2C—Zn1127.9 (3)C10C—C8C—C9C117.5 (5)
C9C—N2C—Zn1113.4 (3)C10C—C8C—C7C124.5 (5)
N1A—C1A—C2A123.4 (5)C9C—C8C—C7C117.9 (5)
C3A—C2A—C1A118.7 (5)N2C—C9C—C8C121.8 (4)
C2A—C3A—C4A120.0 (4)N2C—C9C—C5C118.6 (4)
C5A—C4A—C3A117.2 (4)C8C—C9C—C5C119.5 (4)
C5A—C4A—C6A119.0 (4)C11C—C10C—C8C119.6 (5)
C3A—C4A—C6A123.8 (4)C10C—C11C—C12C119.3 (5)
N1A—C5A—C4A122.9 (4)N2C—C12C—C11C123.0 (5)
O2—Cr1—O4—Cr228.1 (4)C10A—C8A—C9A—N2A1.7 (6)
O1—Cr1—O4—Cr292.2 (3)C7A—C8A—C9A—N2A179.8 (4)
O3—Cr1—O4—Cr2145.8 (3)C10A—C8A—C9A—C5A176.3 (4)
O7—Cr2—O4—Cr180.0 (3)C7A—C8A—C9A—C5A2.2 (6)
O6—Cr2—O4—Cr1160.6 (3)N1A—C5A—C9A—N2A1.1 (5)
O5—Cr2—O4—Cr140.7 (3)C4A—C5A—C9A—N2A179.9 (4)
N1B—Zn1—N1A—C1A83.9 (4)N1A—C5A—C9A—C8A177.0 (3)
N2A—Zn1—N1A—C1A178.2 (4)C4A—C5A—C9A—C8A2.0 (6)
N2B—Zn1—N1A—C1A4.7 (4)C9A—C8A—C10A—C11A0.4 (7)
N1C—Zn1—N1A—C1A89.6 (4)C7A—C8A—C10A—C11A178.1 (5)
N2C—Zn1—N1A—C1A118.9 (5)C8A—C10A—C11A—C12A1.4 (7)
N1B—Zn1—N1A—C5A105.0 (3)C9A—N2A—C12A—C11A1.4 (6)
N2A—Zn1—N1A—C5A10.7 (3)Zn1—N2A—C12A—C11A174.1 (3)
N2B—Zn1—N1A—C5A175.8 (3)C10A—C11A—C12A—N2A0.6 (7)
N1C—Zn1—N1A—C5A81.5 (3)C5B—N1B—C1B—C2B1.0 (7)
N2C—Zn1—N1A—C5A52.2 (6)Zn1—N1B—C1B—C2B173.8 (3)
N1B—Zn1—N2A—C12A71.3 (4)N1B—C1B—C2B—C3B0.0 (8)
N1A—Zn1—N2A—C12A174.2 (4)C1B—C2B—C3B—C4B0.2 (8)
N2B—Zn1—N2A—C12A129.8 (8)C2B—C3B—C4B—C5B1.4 (7)
N1C—Zn1—N2A—C12A96.3 (4)C2B—C3B—C4B—C6B179.1 (5)
N2C—Zn1—N2A—C12A20.4 (4)C1B—N1B—C5B—C4B2.3 (6)
N1B—Zn1—N2A—C9A113.0 (3)Zn1—N1B—C5B—C4B173.2 (3)
N1A—Zn1—N2A—C9A10.1 (3)C1B—N1B—C5B—C9B178.1 (4)
N2B—Zn1—N2A—C9A54.5 (9)Zn1—N1B—C5B—C9B6.4 (5)
N1C—Zn1—N2A—C9A79.5 (3)C3B—C4B—C5B—N1B2.5 (7)
N2C—Zn1—N2A—C9A155.3 (3)C6B—C4B—C5B—N1B178.0 (4)
N1A—Zn1—N1B—C1B84.4 (4)C3B—C4B—C5B—C9B177.9 (4)
N2A—Zn1—N1B—C1B5.5 (4)C6B—C4B—C5B—C9B1.6 (6)
N2B—Zn1—N1B—C1B177.4 (4)C3B—C4B—C6B—C7B176.2 (5)
N1C—Zn1—N1B—C1B120.7 (5)C5B—C4B—C6B—C7B3.4 (8)
N2C—Zn1—N1B—C1B89.4 (4)C4B—C6B—C7B—C8B2.9 (9)
N1A—Zn1—N1B—C5B100.6 (3)C6B—C7B—C8B—C10B176.8 (5)
N2A—Zn1—N1B—C5B179.5 (3)C6B—C7B—C8B—C9B0.6 (8)
N2B—Zn1—N1B—C5B7.5 (3)C12B—N2B—C9B—C8B2.7 (6)
N1C—Zn1—N1B—C5B54.3 (6)Zn1—N2B—C9B—C8B173.6 (3)
N2C—Zn1—N1B—C5B85.7 (3)C12B—N2B—C9B—C5B176.6 (4)
N1B—Zn1—N2B—C12B176.4 (4)Zn1—N2B—C9B—C5B7.1 (5)
N1A—Zn1—N2B—C12B73.2 (4)C10B—C8B—C9B—N2B3.9 (7)
N2A—Zn1—N2B—C12B116.5 (8)C7B—C8B—C9B—N2B179.7 (4)
N1C—Zn1—N2B—C12B17.3 (4)C10B—C8B—C9B—C5B175.4 (4)
N2C—Zn1—N2B—C12B93.2 (4)C7B—C8B—C9B—C5B1.1 (6)
N1B—Zn1—N2B—C9B7.8 (3)N1B—C5B—C9B—N2B0.6 (6)
N1A—Zn1—N2B—C9B111.0 (3)C4B—C5B—C9B—N2B179.8 (4)
N2A—Zn1—N2B—C9B67.7 (9)N1B—C5B—C9B—C8B179.9 (4)
N1C—Zn1—N2B—C9B158.5 (3)C4B—C5B—C9B—C8B0.5 (6)
N2C—Zn1—N2B—C9B82.6 (3)C9B—C8B—C10B—C11B1.9 (7)
N1B—Zn1—N1C—C1C152.1 (5)C7B—C8B—C10B—C11B178.0 (5)
N1A—Zn1—N1C—C1C3.7 (4)C8B—C10B—C11B—C12B1.2 (8)
N2A—Zn1—N1C—C1C81.2 (4)C9B—N2B—C12B—C11B0.6 (8)
N2B—Zn1—N1C—C1C92.1 (4)Zn1—N2B—C12B—C11B176.2 (4)
N2C—Zn1—N1C—C1C175.5 (4)C10B—C11B—C12B—N2B2.5 (9)
N1B—Zn1—N1C—C5C29.8 (7)C5C—N1C—C1C—C2C0.4 (7)
N1A—Zn1—N1C—C5C174.4 (3)Zn1—N1C—C1C—C2C178.5 (4)
N2A—Zn1—N1C—C5C96.9 (3)N1C—C1C—C2C—C3C0.8 (8)
N2B—Zn1—N1C—C5C89.8 (3)C1C—C2C—C3C—C4C0.5 (8)
N2C—Zn1—N1C—C5C2.6 (3)C2C—C3C—C4C—C5C1.0 (7)
N1B—Zn1—N2C—C12C10.1 (4)C2C—C3C—C4C—C6C179.4 (5)
N1A—Zn1—N2C—C12C147.8 (4)C1C—N1C—C5C—C4C2.0 (6)
N2A—Zn1—N2C—C12C87.1 (4)Zn1—N1C—C5C—C4C179.7 (3)
N2B—Zn1—N2C—C12C88.3 (4)C1C—N1C—C5C—C9C177.4 (4)
N1C—Zn1—N2C—C12C178.2 (4)Zn1—N1C—C5C—C9C0.9 (5)
N1B—Zn1—N2C—C9C167.6 (3)C3C—C4C—C5C—N1C2.3 (6)
N1A—Zn1—N2C—C9C34.5 (6)C6C—C4C—C5C—N1C179.2 (4)
N2A—Zn1—N2C—C9C95.2 (3)C3C—C4C—C5C—C9C177.1 (4)
N2B—Zn1—N2C—C9C89.4 (3)C6C—C4C—C5C—C9C1.5 (7)
N1C—Zn1—N2C—C9C4.1 (3)C3C—C4C—C6C—C7C177.5 (5)
C5A—N1A—C1A—C2A1.0 (7)C5C—C4C—C6C—C7C1.0 (8)
Zn1—N1A—C1A—C2A169.8 (4)C4C—C6C—C7C—C8C1.2 (9)
N1A—C1A—C2A—C3A0.3 (8)C6C—C7C—C8C—C10C176.2 (6)
C1A—C2A—C3A—C4A1.4 (8)C6C—C7C—C8C—C9C2.7 (8)
C2A—C3A—C4A—C5A1.3 (7)C12C—N2C—C9C—C8C0.7 (6)
C2A—C3A—C4A—C6A177.3 (5)Zn1—N2C—C9C—C8C178.6 (3)
C1A—N1A—C5A—C4A1.1 (6)C12C—N2C—C9C—C5C176.9 (4)
Zn1—N1A—C5A—C4A171.1 (3)Zn1—N2C—C9C—C5C5.2 (5)
C1A—N1A—C5A—C9A177.9 (4)C10C—C8C—C9C—N2C0.7 (7)
Zn1—N1A—C5A—C9A10.0 (4)C7C—C8C—C9C—N2C178.3 (4)
C3A—C4A—C5A—N1A0.1 (6)C10C—C8C—C9C—C5C176.9 (4)
C6A—C4A—C5A—N1A178.6 (4)C7C—C8C—C9C—C5C2.1 (7)
C3A—C4A—C5A—C9A179.0 (4)N1C—C5C—C9C—N2C3.0 (6)
C6A—C4A—C5A—C9A0.3 (6)C4C—C5C—C9C—N2C176.4 (4)
C5A—C4A—C6A—C7A1.3 (7)N1C—C5C—C9C—C8C179.2 (4)
C3A—C4A—C6A—C7A177.3 (5)C4C—C5C—C9C—C8C0.1 (6)
C4A—C6A—C7A—C8A1.1 (8)C9C—C8C—C10C—C11C0.6 (7)
C6A—C7A—C8A—C10A177.7 (5)C7C—C8C—C10C—C11C178.3 (5)
C6A—C7A—C8A—C9A0.7 (7)C8C—C10C—C11C—C12C0.6 (8)
C12A—N2A—C9A—C8A2.6 (6)C9C—N2C—C12C—C11C0.6 (7)
Zn1—N2A—C9A—C8A173.7 (3)Zn1—N2C—C12C—C11C178.2 (4)
C12A—N2A—C9A—C5A175.5 (4)C10C—C11C—C12C—N2C0.6 (8)
Zn1—N2A—C9A—C5A8.3 (4)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C1A—H1A···O1i0.962.493.297 (6)141
C12B—H12B···O13i0.962.643.277 (16)124
C1B—H1B···O2ii0.962.273.100 (6)144
C12A—H12A···O7ii0.962.333.186 (6)149
C3A—H3A···O2iii0.962.553.400 (7)148
C6A—H6A···O2iii0.962.533.381 (7)148
C3B—H3B···O3iv0.962.493.423 (6)164
C6B—H6B···O4iv0.962.463.388 (6)163
C11B—H11B···O13v0.962.623.540 (18)161
C7A—H7A···O60.962.463.402 (6)167
C10A—H10A···O50.962.283.222 (6)166
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) x, y, z+1/2; (iii) x+1/2, y+1/2, z1/2; (iv) x, y, z+1; (v) x1/2, y+1/2, z+1/2.

Experimental details

Crystal data
Chemical formula[Zn(C12H8N2)3][Cr2O7]·4H2O
Mr894.05
Crystal system, space groupMonoclinic, C2/c
Temperature (K)293
a, b, c (Å)26.687 (5), 17.867 (4), 17.471 (3)
β (°) 106.23 (3)
V3)7998 (3)
Z8
Radiation typeMo Kα
µ (mm1)1.19
Crystal size (mm)0.63 × 0.50 × 0.37
Data collection
DiffractometerKuma KM-4
diffractometer
Absorption correctionψ scans
empirical (using intensity measurements) via ψ scans (Sheldrick, 1990)
Tmin, Tmax0.493, 0.643
No. of measured, independent and
observed [I > 2σ(I)] reflections
9494, 7062, 4863
Rint0.024
(sin θ/λ)max1)0.596
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.047, 0.177, 1.05
No. of reflections7062
No. of parameters523
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.78, 0.38

Computer programs: KM-4 Software (Kuma, 1998), KM-4 Software, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Sheldrick, 1990), SHELXL97.

Selected geometric parameters (Å, º) top
Zn1—N1B2.115 (4)Cr1—O11.599 (4)
Zn1—N1A2.137 (3)Cr1—O31.605 (3)
Zn1—N2A2.140 (3)Cr1—O41.758 (4)
Zn1—N2B2.155 (4)Cr2—O71.592 (4)
Zn1—N1C2.199 (4)Cr2—O61.596 (4)
Zn1—N2C2.215 (4)Cr2—O51.609 (3)
Cr1—O21.579 (4)Cr2—O41.791 (3)
N1B—Zn1—N1A104.0 (1)N1C—Zn1—N2C75.7 (1)
N1B—Zn1—N2A97.0 (1)O2—Cr1—O1109.6 (3)
N1A—Zn1—N2A77.5 (1)O2—Cr1—O3107.6 (2)
N1B—Zn1—N2B78.2 (1)O1—Cr1—O3112.2 (2)
N1A—Zn1—N2B95.8 (1)O2—Cr1—O4110.7 (2)
N2A—Zn1—N2B170.7 (1)O1—Cr1—O4108.5 (2)
N1B—Zn1—N1C164.5 (1)O3—Cr1—O4108.2 (2)
N1A—Zn1—N1C90.1 (1)O7—Cr2—O6110.0 (2)
N2A—Zn1—N1C92.2 (1)O7—Cr2—O5109.3 (2)
N2B—Zn1—N1C94.2 (1)O6—Cr2—O5110.4 (2)
N1B—Zn1—N2C91.1 (1)O7—Cr2—O4110.2 (2)
N1A—Zn1—N2C163.6 (1)O6—Cr2—O4106.9 (2)
N2A—Zn1—N2C94.7 (1)O5—Cr2—O4110.1 (2)
N2B—Zn1—N2C93.4 (1)Cr1—O4—Cr2130.4 (2)
O2—Cr1—O4—Cr228.1 (4)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C1A—H1A···O1i0.962.493.297 (6)141
C12B—H12B···O13i0.962.643.277 (16)124
C1B—H1B···O2ii0.962.273.100 (6)144
C12A—H12A···O7ii0.962.333.186 (6)149
C3A—H3A···O2iii0.962.553.400 (7)148
C6A—H6A···O2iii0.962.533.381 (7)148
C3B—H3B···O3iv0.962.493.423 (6)164
C6B—H6B···O4iv0.962.463.388 (6)163
C11B—H11B···O13v0.962.623.540 (18)161
C7A—H7A···O60.962.463.402 (6)167
C10A—H10A···O50.962.283.222 (6)166
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) x, y, z+1/2; (iii) x+1/2, y+1/2, z1/2; (iv) x, y, z+1; (v) x1/2, y+1/2, z+1/2.
 

Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds