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Acta Crystallogr Sect E Struct Rep Online. 2010 December 1; 66(Pt 12): m1520.
Published online 2010 November 6. doi:  10.1107/S160053681004479X
PMCID: PMC3011605

[μ-1,3-Bis(3,5-dimethyl-1H-pyrazol-1-yl-κN 2)propan-2-olato-κ2 O:O]bis­[(ethanol-κO)zinc(II)] bis­(perchlorate)

Abstract

In the centrosymmetric dinuclear title complex, [Zn2(C13H19N4O)2(C2H5OH)2](ClO4)2, the ZnII atom is in a distorted trigonal-bipyramidal coordination geometry. The equatorial plane is constructed by one N atom and one O atom from two 1,3-bis­(3,5-dimethyl­pyrazol-1-yl)propan-2-olate (bppo) ligands and one O atom from an ethanol mol­ecule. One N atom and one O atom from the two bppo ligands occupy the axial positions. Inter­molecular O—H(...)O hydrogen bonds between the ethanol mol­ecules and perchlorate anions, and O(...)π inter­actions between the perchlorate anions and pyrazole rings [O(...)centroid distances = 3.494 (3) and 3.413 (3) Å], lead to a chain structure along [010].

Related literature

For related structures, see: Montoya et al. (2007 [triangle]).

An external file that holds a picture, illustration, etc.
Object name is e-66-m1520-scheme1.jpg

Experimental

Crystal data

  • [Zn2(C13H19N4O)2(C2H6O)2](ClO4)2
  • M r = 916.42
  • Triclinic, An external file that holds a picture, illustration, etc.
Object name is e-66-m1520-efi1.jpg
  • a = 8.8570 (18) Å
  • b = 11.148 (2) Å
  • c = 11.300 (2) Å
  • α = 111.13 (3)°
  • β = 100.40 (3)°
  • γ = 100.11 (3)°
  • V = 987.8 (5) Å3
  • Z = 1
  • Mo Kα radiation
  • μ = 1.42 mm−1
  • T = 293 K
  • 0.22 × 0.20 × 0.20 mm

Data collection

  • Bruker APEX CCD diffractometer
  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996 [triangle]) T min = 0.765, T max = 0.765
  • 7788 measured reflections
  • 3482 independent reflections
  • 3172 reflections with I > 2σ(I)
  • R int = 0.017

Refinement

  • R[F 2 > 2σ(F 2)] = 0.030
  • wR(F 2) = 0.083
  • S = 1.07
  • 3482 reflections
  • 249 parameters
  • 2 restraints
  • H-atom parameters constrained
  • Δρmax = 0.50 e Å−3
  • Δρmin = −0.22 e Å−3

Data collection: SMART (Bruker, 2007 [triangle]); cell refinement: SAINT (Bruker, 2007 [triangle]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 [triangle]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 [triangle]); molecular graphics: SHELXTL (Sheldrick, 2008 [triangle]) and DIAMOND (Brandenburg, 1999 [triangle]); software used to prepare material for publication: SHELXTL.

Table 1
Selected bond lengths (Å)
Table 2
Hydrogen-bond geometry (Å, °)

Supplementary Material

Crystal structure: contains datablocks I, global. DOI: 10.1107/S160053681004479X/hy2370sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S160053681004479X/hy2370Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Acknowledgments

We are grateful for support from Henan University of Urban Construction.

supplementary crystallographic information

Comment

Pyrazole-derived ligands have been extensively studied in recent years. These ligands are known as anionic or neutral groups to coordinate to metal centers through N atoms in monodentate and exobidentate modes. It is essential to study the syntheses and crystal structures of the complexes formed by pyrazole systematically, and to inquire into the factors that influence the formation and structure of such complexes. Such studies may lead to the design and synthesis of functional materials, and also provide a theoretical foundation for supramolecular chemistry and crystal engineering (Montoya et al., 2007). As part of our studies on the synthesis and characterization of these compounds, we report here the synthesis and crystal structure of the title compound.

In the title compound (Fig. 1), the ZnII atom is five-coordinated by two O atoms and two N atoms from two 1,3-bis(3,5-dimethyl-pyrazol-1-yl)propan-2-olate (bppo) ligands and one O atom from an ethanol molecule in a distorted trigonal–bipyramidal geometry (Table 1). The equatorial plane is constructed by N3i and O6 from the two bppo ligands and O7 from the ethanol molecule. The N1 and O6i atoms occupy the axial positions [symmetry code: (i) 1 - x, -y, -z]. Two hydroxyl O atoms bridge the Zn atoms, forming a dinuclear complex. Intermolecular O—H···O hydrogen bonds between the ethanol molecules and perchlorate anions (Table 2) and O···π interactions between the perchlorate anions and pyrazole rings, O2···Cg1ii and O3···Cg2, [Cg1 and Cg2 are the centroids of C2/C3/C4/N3/N4 ring and C6/C7/C8/N1/N2 ring; symmetry code: (ii) x, -1 + y, z; O—centroid distances = 3.494 (3) and 3.413 (3) Å, respectively], lead to a chain structure along [010] (Fig. 2).

Experimental

1,3-Bis(3,5-dimethyl-pyrazol-1-yl)propan-2-ol and ZnCl2.6H2O were available commercially and were used without further purification. 1,3-Bis(3,5-dimethyl-pyrazol-1-yl)propan-2-ol (124 mg, 0.5 mmol) were dissolved in anhydrous alcohol (15 ml). To this solution was added ZuCl2.6H2O (122 mg, 0.5 mmol) in anhydrous alcohol (10 ml). After keeping the resulting solution in air to evaporate about half of the solvent, blue prismatic crystals of the title compound were formed. The crystals were isolated, washed with alcohol three times and dried in a vacuum desiccator using silica gel (yield: 75%). Analysis, calculated for C30H50Cl2N8O12Zn2: C 39.32, H 5.50, N, 12.23%; found: C 39.42, H 5.28, N 12.35%.

Refinement

H atoms on C atoms were positioned geometrically and refined as riding atoms, with C—H = 0.93–0.98 Å and Uiso(H) = 1.2(1.5 for methyl)Ueq(C). Hydroxy H atom was located in a difference Fourier map and refined as a riding atom, with O—H = 0.85 Å and Uiso(H) = 1.5Ueq(O).

Figures

Fig. 1.
Molecular structure of the title compound. Displacement ellipsoids are drawn at the 50% probability level. H atoms have been omitted for clarity. [Symmetry code: (A) 1 - x, -y, -z.]
Fig. 2.
The chain structure in the title compound. Dashed lines denote O···π interactions.

Crystal data

[Zn2(C13H19N4O)2(C2H6O)2](ClO4)2Z = 1
Mr = 916.42F(000) = 476
Triclinic, P1Dx = 1.541 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.8570 (18) ÅCell parameters from 2230 reflections
b = 11.148 (2) Åθ = 2.3–25.7°
c = 11.300 (2) ŵ = 1.42 mm1
α = 111.13 (3)°T = 293 K
β = 100.40 (3)°Block, colourless
γ = 100.11 (3)°0.22 × 0.20 × 0.20 mm
V = 987.8 (5) Å3

Data collection

Bruker APEX CCD diffractometer3482 independent reflections
Radiation source: fine-focus sealed tube3172 reflections with I > 2σ(I)
graphiteRint = 0.017
[var phi] and ω scansθmax = 25.0°, θmin = 3.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)h = −10→10
Tmin = 0.765, Tmax = 0.765k = −13→13
7788 measured reflectionsl = −13→13

Refinement

Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.030Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.083H-atom parameters constrained
S = 1.07w = 1/[σ2(Fo2) + (0.0486P)2 + 0.4173P] where P = (Fo2 + 2Fc2)/3
3482 reflections(Δ/σ)max < 0.001
249 parametersΔρmax = 0.50 e Å3
2 restraintsΔρmin = −0.22 e Å3

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)

xyzUiso*/Ueq
Zn10.44360 (3)−0.13668 (2)0.00434 (2)0.03250 (11)
N10.3373 (2)−0.18995 (19)0.13387 (19)0.0385 (4)
N20.3198 (2)−0.09350 (19)0.24246 (19)0.0364 (4)
O60.40890 (17)0.04471 (14)0.07488 (15)0.0331 (3)
O70.6260 (2)−0.21497 (19)0.07459 (19)0.0528 (5)
H7A0.6208−0.23590.13930.079*
C50.2447 (4)−0.4353 (3)0.0179 (3)0.0597 (7)
H5A0.2756−0.4202−0.05380.089*
H5B0.1397−0.4941−0.01350.089*
H5C0.3182−0.47480.05440.089*
C60.2460 (3)−0.3054 (2)0.1218 (2)0.0413 (5)
C70.1694 (3)−0.2813 (3)0.2213 (3)0.0453 (6)
H70.0970−0.34420.23340.054*
C80.2202 (3)−0.1478 (3)0.2983 (2)0.0413 (5)
C90.1855 (4)−0.0683 (3)0.4239 (3)0.0606 (8)
H9A0.2773−0.04310.49610.091*
H9B0.0971−0.12100.43680.091*
H9C0.15990.01040.41930.091*
C100.4166 (3)0.0433 (2)0.2899 (2)0.0381 (5)
H10A0.52790.04350.30300.046*
H10B0.40160.09570.37430.046*
C110.3753 (3)0.1084 (2)0.1951 (2)0.0331 (5)
H110.26050.09970.17700.040*
C130.7924 (3)−0.1751 (4)0.0899 (3)0.0641 (8)
H13A0.8108−0.17600.00760.077*
H13B0.8423−0.23830.11100.077*
C140.8653 (5)−0.0412 (4)0.1945 (6)0.1128 (18)
H14A0.80590.01900.18080.169*
H14B0.9729−0.01130.19260.169*
H14C0.8647−0.04390.27830.169*
C120.4601 (3)0.2576 (2)0.2567 (2)0.0367 (5)
H12A0.42220.29760.19770.044*
H12B0.43280.29980.33850.044*
N30.7009 (2)0.25422 (18)0.17989 (19)0.0366 (4)
N40.6328 (2)0.28347 (18)0.28297 (18)0.0359 (4)
C10.7043 (4)0.3867 (3)0.5278 (3)0.0630 (8)
H1A0.64390.45060.52950.094*
H1B0.80070.42830.59770.094*
H1C0.64280.31360.53890.094*
C20.7442 (3)0.3366 (2)0.3990 (2)0.0437 (6)
C30.8885 (3)0.3381 (3)0.3704 (3)0.0501 (6)
H30.98770.36740.43060.060*
C150.9736 (3)0.2689 (3)0.1524 (3)0.0614 (8)
H15A0.92410.19440.06960.092*
H15B1.06530.25250.19740.092*
H15C1.00550.34790.13730.092*
C40.8579 (3)0.2875 (2)0.2346 (3)0.0433 (6)
O10.7169 (4)−0.2927 (3)0.4897 (3)0.1003 (9)
O20.5741 (4)−0.4532 (3)0.2842 (4)0.1233 (12)
O30.6271 (4)−0.2330 (3)0.3209 (3)0.0955 (9)
O40.8318 (4)−0.3383 (4)0.3177 (3)0.1242 (12)
Cl10.68858 (8)−0.33052 (6)0.35237 (7)0.05214 (18)

Atomic displacement parameters (Å2)

U11U22U33U12U13U23
Zn10.03703 (16)0.02905 (16)0.03013 (16)0.00679 (10)0.01162 (11)0.01013 (11)
N10.0468 (11)0.0325 (10)0.0367 (11)0.0091 (8)0.0174 (9)0.0121 (8)
N20.0422 (10)0.0341 (10)0.0325 (10)0.0070 (8)0.0130 (8)0.0131 (8)
O60.0396 (8)0.0292 (8)0.0296 (8)0.0076 (6)0.0132 (6)0.0099 (6)
O70.0477 (10)0.0682 (12)0.0590 (12)0.0215 (9)0.0158 (9)0.0403 (10)
C50.078 (2)0.0344 (14)0.0638 (19)0.0087 (13)0.0274 (16)0.0154 (13)
C60.0462 (13)0.0354 (13)0.0418 (14)0.0060 (10)0.0114 (11)0.0175 (11)
C70.0459 (13)0.0442 (14)0.0467 (15)0.0021 (11)0.0137 (11)0.0231 (12)
C80.0449 (13)0.0474 (14)0.0365 (13)0.0088 (10)0.0155 (10)0.0218 (11)
C90.0747 (19)0.0637 (18)0.0458 (16)0.0113 (15)0.0313 (15)0.0207 (14)
C100.0417 (12)0.0356 (12)0.0318 (12)0.0043 (9)0.0096 (10)0.0104 (10)
C110.0325 (11)0.0335 (11)0.0330 (12)0.0086 (9)0.0139 (9)0.0105 (9)
C130.0497 (16)0.099 (3)0.066 (2)0.0353 (16)0.0243 (15)0.0470 (19)
C140.068 (2)0.086 (3)0.177 (5)0.002 (2)−0.007 (3)0.072 (3)
C120.0416 (12)0.0318 (12)0.0366 (13)0.0108 (9)0.0159 (10)0.0107 (10)
N30.0364 (10)0.0339 (10)0.0340 (10)0.0066 (8)0.0112 (8)0.0079 (8)
N40.0401 (10)0.0319 (10)0.0304 (10)0.0054 (8)0.0095 (8)0.0082 (8)
C10.080 (2)0.0609 (18)0.0336 (15)0.0046 (15)0.0084 (14)0.0131 (13)
C20.0550 (15)0.0314 (12)0.0344 (13)0.0021 (10)0.0037 (11)0.0098 (10)
C30.0450 (14)0.0431 (14)0.0467 (16)0.0014 (11)−0.0047 (12)0.0134 (12)
C150.0406 (14)0.0656 (19)0.075 (2)0.0121 (13)0.0207 (14)0.0229 (16)
C40.0392 (12)0.0352 (13)0.0489 (15)0.0062 (10)0.0078 (11)0.0133 (11)
O10.135 (2)0.135 (3)0.0666 (17)0.065 (2)0.0451 (17)0.0586 (18)
O20.125 (2)0.0526 (16)0.163 (3)−0.0057 (15)0.031 (2)0.0271 (18)
O30.140 (2)0.0671 (16)0.0824 (18)0.0311 (16)0.0106 (17)0.0403 (14)
O40.088 (2)0.178 (3)0.116 (3)0.040 (2)0.0609 (19)0.051 (2)
Cl10.0664 (4)0.0457 (4)0.0509 (4)0.0129 (3)0.0249 (3)0.0234 (3)

Geometric parameters (Å, °)

Zn1—N12.076 (2)C11—H110.9800
Zn1—N3i2.042 (2)C13—C141.468 (6)
Zn1—O61.9908 (16)C13—H13A0.9700
Zn1—O6i2.0428 (16)C13—H13B0.9700
Zn1—O72.1292 (18)C14—H14A0.9600
Zn1—Zn1i3.0784 (9)C14—H14B0.9600
N1—C61.340 (3)C14—H14C0.9600
N1—N21.364 (3)C12—N41.460 (3)
N2—C81.353 (3)C12—H12A0.9700
N2—C101.461 (3)C12—H12B0.9700
O6—C111.401 (3)N3—C41.341 (3)
O6—Zn1i2.0428 (16)N3—N41.370 (3)
O7—C131.422 (3)N3—Zn1i2.042 (2)
O7—H7A0.8500N4—C21.346 (3)
C5—C61.496 (4)C1—C21.491 (4)
C5—H5A0.9600C1—H1A0.9600
C5—H5B0.9600C1—H1B0.9600
C5—H5C0.9600C1—H1C0.9600
C6—C71.385 (4)C2—C31.372 (4)
C7—C81.366 (4)C3—C41.385 (4)
C7—H70.9300C3—H30.9300
C8—C91.497 (4)C15—C41.495 (4)
C9—H9A0.9600C15—H15A0.9600
C9—H9B0.9600C15—H15B0.9600
C9—H9C0.9600C15—H15C0.9600
C10—C111.522 (3)O1—Cl11.414 (3)
C10—H10A0.9700O2—Cl11.401 (3)
C10—H10B0.9700O3—Cl11.422 (3)
C11—C121.534 (3)O4—Cl11.402 (3)
O6—Zn1—N3i112.71 (8)C10—C11—C12111.32 (19)
O6—Zn1—O6i80.52 (7)O6—C11—H11107.6
N3i—Zn1—O6i89.87 (7)C10—C11—H11107.6
O6—Zn1—N191.69 (7)C12—C11—H11107.6
N3i—Zn1—N1106.21 (8)O7—C13—C14111.5 (3)
O6i—Zn1—N1163.86 (7)O7—C13—H13A109.3
O6—Zn1—O7130.72 (8)C14—C13—H13A109.3
N3i—Zn1—O7115.77 (8)O7—C13—H13B109.3
O6i—Zn1—O791.14 (7)C14—C13—H13B109.3
N1—Zn1—O783.23 (8)H13A—C13—H13B108.0
O6—Zn1—Zn1i40.88 (4)C13—C14—H14A109.5
N3i—Zn1—Zn1i104.37 (6)C13—C14—H14B109.5
O6i—Zn1—Zn1i39.63 (4)H14A—C14—H14B109.5
N1—Zn1—Zn1i131.04 (6)C13—C14—H14C109.5
O7—Zn1—Zn1i115.79 (6)H14A—C14—H14C109.5
C6—N1—N2106.23 (19)H14B—C14—H14C109.5
C6—N1—Zn1132.19 (16)N4—C12—C11112.81 (18)
N2—N1—Zn1119.85 (14)N4—C12—H12A109.0
C8—N2—N1110.49 (19)C11—C12—H12A109.0
C8—N2—C10129.5 (2)N4—C12—H12B109.0
N1—N2—C10119.68 (18)C11—C12—H12B109.0
C11—O6—Zn1126.98 (13)H12A—C12—H12B107.8
C11—O6—Zn1i124.67 (13)C4—N3—N4105.54 (19)
Zn1—O6—Zn1i99.48 (7)C4—N3—Zn1i134.36 (17)
C13—O7—Zn1128.78 (17)N4—N3—Zn1i117.88 (14)
C13—O7—H7A103.2C2—N4—N3111.10 (19)
Zn1—O7—H7A118.4C2—N4—C12129.4 (2)
C6—C5—H5A109.5N3—N4—C12119.52 (18)
C6—C5—H5B109.5C2—C1—H1A109.5
H5A—C5—H5B109.5C2—C1—H1B109.5
C6—C5—H5C109.5H1A—C1—H1B109.5
H5A—C5—H5C109.5C2—C1—H1C109.5
H5B—C5—H5C109.5H1A—C1—H1C109.5
N1—C6—C7109.4 (2)H1B—C1—H1C109.5
N1—C6—C5121.1 (2)N4—C2—C3106.6 (2)
C7—C6—C5129.4 (2)N4—C2—C1122.5 (2)
C8—C7—C6107.2 (2)C3—C2—C1130.8 (2)
C8—C7—H7126.4C2—C3—C4106.8 (2)
C6—C7—H7126.4C2—C3—H3126.6
N2—C8—C7106.7 (2)C4—C3—H3126.6
N2—C8—C9123.0 (2)C4—C15—H15A109.5
C7—C8—C9130.2 (2)C4—C15—H15B109.5
C8—C9—H9A109.5H15A—C15—H15B109.5
C8—C9—H9B109.5C4—C15—H15C109.5
H9A—C9—H9B109.5H15A—C15—H15C109.5
C8—C9—H9C109.5H15B—C15—H15C109.5
H9A—C9—H9C109.5N3—C4—C3109.9 (2)
H9B—C9—H9C109.5N3—C4—C15121.5 (2)
N2—C10—C11112.67 (19)C3—C4—C15128.6 (2)
N2—C10—H10A109.1O2—Cl1—O4110.6 (2)
C11—C10—H10A109.1O2—Cl1—O1110.3 (2)
N2—C10—H10B109.1O4—Cl1—O1109.0 (2)
C11—C10—H10B109.1O2—Cl1—O3107.9 (2)
H10A—C10—H10B107.8O4—Cl1—O3110.9 (2)
O6—C11—C10111.91 (18)O1—Cl1—O3108.07 (18)
O6—C11—C12110.58 (18)
O6—Zn1—N1—C6144.8 (2)C10—N2—C8—C7−174.6 (2)
N3i—Zn1—N1—C630.5 (2)N1—N2—C8—C9176.0 (2)
O6i—Zn1—N1—C6−154.6 (2)C10—N2—C8—C93.1 (4)
O7—Zn1—N1—C6−84.4 (2)C6—C7—C8—N22.3 (3)
Zn1i—Zn1—N1—C6157.08 (19)C6—C7—C8—C9−175.3 (3)
O6—Zn1—N1—N2−18.00 (17)C8—N2—C10—C11−120.3 (3)
N3i—Zn1—N1—N2−132.25 (17)N1—N2—C10—C1167.4 (3)
O6i—Zn1—N1—N242.6 (3)Zn1—O6—C11—C1017.7 (2)
O7—Zn1—N1—N2112.83 (18)Zn1i—O6—C11—C10−122.81 (16)
Zn1i—Zn1—N1—N2−5.7 (2)Zn1—O6—C11—C12142.41 (15)
C6—N1—N2—C80.5 (3)Zn1i—O6—C11—C121.9 (2)
Zn1—N1—N2—C8167.30 (16)N2—C10—C11—O6−64.4 (2)
C6—N1—N2—C10174.2 (2)N2—C10—C11—C12171.27 (17)
Zn1—N1—N2—C10−19.0 (3)Zn1—O7—C13—C1467.8 (4)
N3i—Zn1—O6—C11126.18 (16)O6—C11—C12—N4−60.2 (2)
O6i—Zn1—O6—C11−147.97 (19)C10—C11—C12—N464.9 (2)
N1—Zn1—O6—C1117.82 (17)C4—N3—N4—C21.5 (2)
O7—Zn1—O6—C11−64.70 (18)Zn1i—N3—N4—C2166.94 (15)
Zn1i—Zn1—O6—C11−147.97 (19)C4—N3—N4—C12−179.55 (19)
N3i—Zn1—O6—Zn1i−85.85 (8)Zn1i—N3—N4—C12−14.1 (2)
O6i—Zn1—O6—Zn1i0.0C11—C12—N4—C2−111.0 (3)
N1—Zn1—O6—Zn1i165.79 (8)C11—C12—N4—N370.2 (3)
O7—Zn1—O6—Zn1i83.27 (10)N3—N4—C2—C3−1.9 (3)
O6—Zn1—O7—C13−62.0 (3)C12—N4—C2—C3179.3 (2)
N3i—Zn1—O7—C13106.8 (2)N3—N4—C2—C1175.6 (2)
O6i—Zn1—O7—C1316.4 (2)C12—N4—C2—C1−3.3 (4)
N1—Zn1—O7—C13−148.4 (2)N4—C2—C3—C41.5 (3)
Zn1i—Zn1—O7—C13−15.8 (2)C1—C2—C3—C4−175.6 (3)
N2—N1—C6—C71.0 (3)N4—N3—C4—C3−0.5 (3)
Zn1—N1—C6—C7−163.53 (18)Zn1i—N3—C4—C3−162.39 (18)
N2—N1—C6—C5−175.6 (2)N4—N3—C4—C15179.5 (2)
Zn1—N1—C6—C520.0 (4)Zn1i—N3—C4—C1517.6 (4)
N1—C6—C7—C8−2.0 (3)C2—C3—C4—N3−0.7 (3)
C5—C6—C7—C8174.1 (3)C2—C3—C4—C15179.4 (3)
N1—N2—C8—C7−1.8 (3)

Symmetry codes: (i) −x+1, −y, −z.

Hydrogen-bond geometry (Å, °)

D—H···AD—HH···AD···AD—H···A
O7—H7A···O30.852.032.860 (3)165

Footnotes

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HY2370).

References

  • Brandenburg, K. (1999). DIAMOND Crystal Impact GbR, Bonn, Germany.
  • Bruker (2007). SMART and SAINT Bruker AXS Inc., Madison, Wisconsin, USA.
  • Montoya, V., Pons, J., Garcia-Antón, J., Solans, X., Font-Bardia, M. & Ros, J. (2007). Inorg. Chim. Acta, 360, 625–637.
  • Sheldrick, G. M. (1996). SADABS University of Göttingen, Germany.
  • Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. [PubMed]

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