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The title complex, [BaNi(C3H2O4)2(H2O)3]n, is polymeric, with two non-equivalent malonate dianions bridging one Ni atom and five different Ba atoms. The Ni atoms have a distorted octa­hedral (NiO6) environment, and are coordinated by four malonate O atoms in a planar arrangement and two water mol­ecules in axial positions. The Ba atom may be described as a BaO9 polyhedron in a monocapped square-anti­prismatic environment, which involves two water mol­ecules and seven O atoms from different malonate ligands. The three-dimensional structure is further maintained and stabilized by hydrogen bonds.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270107060763/fa3125sup1.cif
Contains datablocks I, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S0108270107060763/fa3125Isup2.hkl
Contains datablock I

CCDC reference: 677090

Comment top

Heterobimetallic malonate complexes involving transition and alkaline-earth metals have attracted much attention recently in the area of topology design and for their potential applications in molecular-based magnetism, catalysis, supramolecular chemistry and materials science (Gil de Muro et al., 1998, 2004; Fu et al., 2006). The use of dicarboxylate ligands as small building blocks to generate metal-organic frameworks of different dimensionalities may lead to interesting network architectures (Rodriguez-Martin et al., 2002). From a coordination standpoint, the malonate ligand, with two neighboring carboxylate groups, is a very flexible ligand. Its basic coordination mode is as a chelate via two distal carboxylate O atoms to form a six-membered ring and the coordinating ability of the nonchelating O atoms makes the formation of polymeric networks possible (Djeghri et al., 2005, 2006). In the course of our study of heterobimetallic malonate complexes involving transition and alkaline-earth metals, we have recently reported the crystal structures of poly[tetraaqua-di-µ4-malonato-barium(II)zinc(II)] (Guo & Guo, 2006) and poly[tetra-µ-aqua-hexaaquadi-µ3-malonato-dinitratodibarium(II)nickel(II)] (Guo & Cao, 2006). Interestingly, when nickel chloride was used in an attempt to obtain a product similar or isotypic to that of the zinc compound, a completly different crystal structure was obtained. We report here the structure of the bimetallic malonate complex (I).

The asymmetric unit of (I) comprises one Ni atom, one Ba atom, two complete malonate dianions (C1–C3/O1–O4 and C4–C6/O5–O8) and three non-equivalent water molecules (O9–O11), and is shown in Fig. 1 in a symmetry-expanded view that displays the full coordination of the Ba and Ni atoms. Selected geometric parameters are given in Table 1.

The Ba atom is surrounded by an O9 donor set in an approximate monocapped square antiprismatic environment (Fig. 1). The four coordination sites of the basal plane are occupied by atoms O6iii from a malonate dianion, O4iv from a second malonate ligand and two coordinated water molecules (O11 and O11i). The opposite plane contains two O atoms (O1 and O5) from two malonate ligands, a bridging O atom (O4ii) from a third malonate ligand and a chelating carboxylate O atom (O7v) from a fourth malonate ligand (see Fig. 1 for symmetry codes). Finally, the capping site is occupied by the chelating atom O8v. Of the Ba—O distances (Table 1), Ba—O7v and Ba—O8v are the longest, probably as a result of strain in the four-membered chelate. The Ba—O(water) bonds are slightly shorter than those in [Ba2Ni(C3H2O4)2(NO3)2(H2O)10] (Guo & Cao, 2006), while the Ba—O(malonate) bond distances correspond well with the sum of the ionic radii [1.21 + 1.66 = 2.87 Å for 10-coordinate Ba2+ ions; Bauer et al., 2005] and are comparable to the values reported for barium oxydiacetates (Baggio et al. 2004). The BaO9 polyhedra share edges to form zigzag chains propagated in the c direction via pairs of water bridges (O11 and O11i) or bridging malonate O4ii and O4iv atoms. This results in Ba1···Ba1i separations of 4.3362 (8) Å.

The Ni atom has octahedral coordination, with atoms O1, O3, O5 and O7 of two non-equivalent malonate dianions in a planar arrangement, and atoms O9 and O10 from two water molecules in a trans conformation. The Ni—O(water) bonds are slightly longer while the Ni—O(malonate) bonds are somewhat shorter than those in [CaNi(mal)2(H2O)4]·2H2O (Gil de Muro et al., 2000). Thus, the coordination octahedra of the Ni atoms can be visualized as having a slightly elongated axial distortion.

Also evident in Fig. 1 is the variability of the coordination modes of the malonate ligand. Monodentate, bidentate chelating, chelated six-membered and bridging coordination modes are all present. In the case of the C1–C3/O1–O4 malonate dianion, atom O1 adopts both a monodentate mode bonding to Ni and a bridging bonding mode to Ni and Ba. Atom O4 adopts a bridging mode to connect two Ba atoms. Furthermore, two carboxyl groups (atoms O1 and O3) adopt a six-membered chelating mode, forming a ring around Ni with an envelope conformation, with arom C2 displaced by 0.65 Å from the plane defined by the other atoms in the ring. For the C4–C6/O5–O8 malonate dianion, the coordination modes of atom O5 are the same as for atom O1; atom O6 adopts a monodentate mode, coordinating another Ba atom. Atoms O7 and O8 from the same carboxyl function chelate the Ba atom at (x - 1/2, -y + 3/2, z - 1/2) to form a four-membered ring. Atoms O7 and O5 from different carboxyl groups form a six-membered chelate (Ni1/O5/C4–C6/O7) with a boat conformation; atoms Ni1 and C5 lie 0.52 and 0.42 Å, respectively, out of the O5/C4/C6/O7 plane. The Ni1···Ba1 separation of 3.8059 (14) Å, mediated by the O1,O5 double bridge, is much less than the sum of their van der Waals radii (2.30 + 2.14 = 4.44 Å). This suggests some degree of interaction between the Ni and Ba atoms.

The structure as a whole consists of two distinct types of layer (Fig. 2), both perpendicular to [100] and stacked alternately in the a direction. The first of these (Fig. 3) is composed entirely of Ni atoms, malonate dianions and water molecules (O9, O10). Hydrogen bonding plays an important role in the stabilization of the extended layers. The noncoordinated O2 atom is involved in forming strong hydrogen bonds (O9—H9A···O2vi; symmetry codes as in Table 2) (Brown, 1976). Within this layer, and along the c direction, O9—H9A···O2vi and O10—H10A···O8vii hydrogen bonds are responsible for the formation of a 12-membered hydrogen-bonded R22(12) ring (Bernstein et al., 1995). In the b direction, the neighbouring Ni coordination octahedra are linked together via O10—H10B···O6iii hydrogen bonds and 14-membered hydrogen-bonded R22(14) rings. In this way, a complete two-dimensional connectivity is achieved parallel to the bc plane.

The other type of layer, type 2, consists of Ba atoms and water molecules (Fig. 2). In the crystallographic a direction, the connectivity of two layers is achieved by means of O1, O5 and O7 bridging atoms and O6—C4—O5, O4—C3—O3 and O8—C6—O7 bridges between Ni1 coordination octahedra and neighbouring BaO9 polyhedra. At the same time, the zigzag BaO9 polyhedral chains in the c direction are linked into layers and complete the three-dimensional connectivity of the structure. The interlayer connectivity is further enhanced by hydrogen bonds of the form O11—H11A···O3v and O11—H11B···O2 (Table 2).

Related literature top

For related literature, see: Bauer et al. (2005); Bernstein et al. (1995); Brown (1976); Fu et al. (2006); Gil de Muro, Insausti, Lezama, Urtiaga, Arriortua & Rojo (2000); Gil de Muro, Lezama, Insausti & Rojo (2004); Gil de Muro, Mautner, Insausti, Lezama & Rojo (1998); Guo & Cao (2006); Guo & Guo (2006); Rodriguez-Martin, Hernandez-Molina, Delgado, Pasan, Ruiz-Perez, Sanchiz, Lloretc & Julvec (2002).

Experimental top

The title complex was prepared under continuous stirring with successive addition of malonic acid (0.31 g, 3 mmol), NiCl2·6H2O (0.47 g, 2 mmol),and Ba(OH)2·8H2O (0.63 g, 2 mmol) to distilled water (20 ml) at room temperature. After filtration, slow evaporation over a period of 3 d at room temperature provided green needle crystals of (I).

Refinement top

All difference peaks larger than 1.0 e Å-3 are around atom Ba1. The highest difference peak lies 0.85 Å from atom Ba1. All H atoms attached to O atoms were found in difference Fourier maps. During refinement, the H atoms were fixed at O—H distances of 0.85 Å and their Uiso(H) values were set at 1.2Ueq(O). H atoms of CH2 groups were treated as riding [C—H = 0.97 Å and Uiso(H) = 1.2Ueq(C)].

Computing details top

Data collection: CrystalClear (Rigaku/MSC, 2005); cell refinement: CrystalClear (Rigaku/MSC, 2005); data reduction: CrystalClear (Rigaku/MSC, 2005); program(s) used to solve structure: SHELXTL (Bruker, 2001); program(s) used to refine structure: SHELXTL (Bruker, 2001); molecular graphics: SHELXTL (Bruker, 2001); software used to prepare material for publication: SHELXTL (Bruker, 2001).

Figures top
[Figure 1] Fig. 1. A view of the structure of (I), showing the atom-numbering scheme and coordination polyhedra for Ni and Ba atoms; displacement ellipsoids were drawn at the 30% probability level. [Symmetry codes: (i) x, -y + 1, z - 1/2; (ii) x + 1/2, -y + 3/2, z - 1/2; (iii) x, -y + 1, z + 1/2; (iv) x + 1/2, y - 1/2, z; (v) x + 1/2, -y + 3/2, z + 1/2.]
[Figure 2] Fig. 2. The packing of (I), showing hydrogen-bonding interactions within a type 1 layer parallel to the bc plane, viewed down the a axis.
[Figure 3] Fig. 3. The packing of (I), viewed down the b axis, showing the alternation of type 1 and type 2 layers along the a axis.
Poly[µ-aqua-diaqua-µ4-malonato-µ3-malonato-barium(II)nickel(II)] top
Crystal data top
[BaNi(C3H2O4)2(H2O)3]F(000) = 872
Mr = 454.19Dx = 2.504 Mg m3
Monoclinic, CcMo Kα radiation, λ = 0.71073 Å
Hall symbol: C -2ycCell parameters from 2018 reflections
a = 12.177 (2) Åθ = 2.9–27.9°
b = 13.842 (3) ŵ = 4.86 mm1
c = 7.1502 (14) ÅT = 294 K
β = 91.17 (3)°Needle, green
V = 1204.9 (4) Å30.12 × 0.10 × 0.06 mm
Z = 4
Data collection top
Rigaku Saturn
diffractometer
1432 independent reflections
Radiation source: fine-focus sealed tube1424 reflections with I > 2σ(I)
Confocal monochromatorRint = 0.026
Detector resolution: 28.676 pixels mm-1θmax = 25.0°, θmin = 2.9°
ω scansh = 1214
Absorption correction: multi-scan
(Jacobson, 1998)
k = 1616
Tmin = 0.558, Tmax = 0.738l = 78
3369 measured reflections
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.042H-atom parameters constrained
wR(F2) = 0.099 w = 1/[σ2(Fo2) + (0.0834P)2]
where P = (Fo2 + 2Fc2)/3
S = 1.09(Δ/σ)max < 0.001
1432 reflectionsΔρmax = 1.23 e Å3
173 parametersΔρmin = 0.65 e Å3
2 restraintsAbsolute structure: Flack (1983), 365 Friedel pairs
Primary atom site location: structure-invariant direct methodsAbsolute structure parameter: 0.18 (6)
Crystal data top
[BaNi(C3H2O4)2(H2O)3]V = 1204.9 (4) Å3
Mr = 454.19Z = 4
Monoclinic, CcMo Kα radiation
a = 12.177 (2) ŵ = 4.86 mm1
b = 13.842 (3) ÅT = 294 K
c = 7.1502 (14) Å0.12 × 0.10 × 0.06 mm
β = 91.17 (3)°
Data collection top
Rigaku Saturn
diffractometer
1432 independent reflections
Absorption correction: multi-scan
(Jacobson, 1998)
1424 reflections with I > 2σ(I)
Tmin = 0.558, Tmax = 0.738Rint = 0.026
3369 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.042H-atom parameters constrained
wR(F2) = 0.099Δρmax = 1.23 e Å3
S = 1.09Δρmin = 0.65 e Å3
1432 reflectionsAbsolute structure: Flack (1983), 365 Friedel pairs
173 parametersAbsolute structure parameter: 0.18 (6)
2 restraints
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*/Ueq
Ba11.09630 (6)0.58864 (3)0.08472 (7)0.0509 (2)
Ni10.85771 (10)0.75456 (8)0.04657 (15)0.0512 (3)
O10.9631 (6)0.7449 (5)0.1789 (11)0.0559 (16)
O20.9781 (7)0.7695 (6)0.4821 (11)0.0636 (18)
O30.7784 (6)0.8606 (5)0.0811 (9)0.0552 (15)
O40.7371 (6)0.9655 (5)0.3024 (10)0.0556 (14)
O50.9218 (6)0.6344 (5)0.1662 (10)0.0544 (14)
O60.8982 (5)0.4912 (5)0.2985 (10)0.0557 (14)
O70.7548 (6)0.7731 (5)0.2746 (11)0.0547 (15)
O80.6865 (6)0.7295 (5)0.5471 (11)0.0574 (16)
O90.9735 (6)0.8426 (5)0.1723 (11)0.0559 (14)
H9A0.96380.82680.28640.067*
H9B1.03920.84190.12990.067*
O100.7560 (6)0.6563 (5)0.0964 (10)0.0553 (15)
H10A0.73260.69060.18550.066*
H10B0.79770.60920.12510.066*
O111.0786 (7)0.5978 (4)0.4634 (13)0.0568 (16)
H11A1.14430.60110.50630.068*
H11B1.03750.64610.48500.068*
C10.9578 (8)0.7975 (7)0.3218 (16)0.054 (2)
C20.9203 (12)0.9001 (8)0.295 (2)0.065 (3)
H2A0.92670.93360.41430.078*
H2B0.96870.93190.20870.078*
C30.8056 (9)0.9090 (6)0.2238 (17)0.052 (2)
C40.8685 (9)0.5759 (7)0.2656 (16)0.052 (2)
C50.7550 (11)0.6044 (8)0.349 (2)0.065 (3)
H5A0.74370.56790.46330.078*
H5B0.69980.58300.26210.078*
C60.7321 (8)0.7106 (8)0.3936 (15)0.055 (2)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ba10.0510 (3)0.0496 (3)0.0522 (3)0.0004 (2)0.00175 (19)0.0002 (2)
Ni10.0525 (6)0.0502 (5)0.0509 (7)0.0025 (4)0.0007 (5)0.0013 (5)
O10.059 (4)0.059 (4)0.050 (4)0.008 (3)0.003 (3)0.001 (3)
O20.060 (4)0.076 (4)0.054 (4)0.015 (3)0.000 (3)0.002 (3)
O30.058 (3)0.052 (3)0.055 (4)0.010 (3)0.003 (3)0.002 (3)
O40.060 (3)0.056 (3)0.052 (3)0.006 (3)0.004 (3)0.005 (3)
O50.058 (3)0.049 (3)0.055 (4)0.002 (3)0.004 (3)0.001 (3)
O60.051 (3)0.054 (3)0.062 (4)0.004 (3)0.002 (3)0.001 (3)
O70.056 (4)0.050 (3)0.058 (4)0.007 (3)0.001 (3)0.001 (3)
O80.052 (4)0.060 (4)0.060 (4)0.008 (3)0.005 (3)0.007 (3)
O90.058 (4)0.057 (3)0.053 (3)0.001 (3)0.004 (3)0.001 (3)
O100.060 (4)0.052 (3)0.054 (4)0.003 (3)0.005 (3)0.002 (3)
O110.054 (4)0.050 (3)0.067 (4)0.003 (2)0.002 (3)0.002 (3)
C10.051 (5)0.057 (5)0.054 (5)0.006 (4)0.000 (4)0.005 (4)
C20.070 (7)0.059 (6)0.066 (7)0.000 (4)0.002 (6)0.010 (5)
C30.052 (6)0.049 (5)0.056 (6)0.000 (3)0.007 (5)0.003 (3)
C40.049 (5)0.053 (4)0.053 (6)0.001 (3)0.001 (4)0.001 (4)
C50.061 (6)0.060 (5)0.075 (7)0.006 (5)0.009 (5)0.001 (5)
C60.047 (4)0.064 (5)0.055 (5)0.001 (4)0.001 (4)0.003 (5)
Geometric parameters (Å, º) top
Ba1—O112.724 (10)O4—C31.281 (12)
Ba1—O11i2.729 (6)O5—C41.251 (13)
Ba1—O4ii2.778 (7)O6—C41.250 (12)
Ba1—O12.794 (7)O7—C61.241 (13)
Ba1—O6iii2.796 (6)O8—C61.247 (13)
Ba1—O52.825 (7)O9—H9A0.8505
Ba1—O4iv2.857 (7)O9—H9B0.8495
Ba1—O7v2.885 (7)O10—H10A0.8486
Ba1—O8v2.911 (7)O10—H10B0.8495
Ba1—Ni13.8059 (14)O11—H11A0.8518
Ba1—Ba1i4.3362 (8)O11—H11B0.8524
Ni1—O31.989 (6)C1—C21.503 (15)
Ni1—O52.033 (7)C2—C31.482 (19)
Ni1—O12.045 (8)C2—H2A0.9700
Ni1—O72.052 (8)C2—H2B0.9700
Ni1—O92.082 (7)C4—C51.545 (17)
Ni1—O102.117 (7)C5—C61.528 (16)
O1—C11.257 (14)C5—H5A0.9700
O2—C11.230 (14)C5—H5B0.9700
O3—C31.259 (14)
O11—Ba1—O11i110.6 (2)O1—Ni1—O1086.7 (3)
O11—Ba1—O4ii142.9 (2)O7—Ni1—O1096.3 (3)
O11i—Ba1—O4ii63.9 (2)O9—Ni1—O10173.2 (3)
O11—Ba1—O170.5 (2)C1—O1—Ni1124.1 (6)
O11i—Ba1—O1140.0 (3)C1—O1—Ba1133.1 (6)
O4ii—Ba1—O1138.9 (2)Ni1—O1—Ba1102.6 (3)
O11—Ba1—O6iii68.6 (2)C3—O3—Ni1129.9 (7)
O11i—Ba1—O6iii70.0 (2)C3—O4—Ba1vi124.8 (6)
O4ii—Ba1—O6iii131.3 (2)C3—O4—Ba1vii120.9 (7)
O1—Ba1—O6iii74.1 (2)Ba1vi—O4—Ba1vii100.6 (2)
O11—Ba1—O5123.2 (2)C4—O5—Ni1124.7 (7)
O11i—Ba1—O587.5 (2)C4—O5—Ba1126.2 (6)
O4ii—Ba1—O593.8 (2)Ni1—O5—Ba1101.9 (3)
O1—Ba1—O563.0 (2)C4—O6—Ba1i133.0 (6)
O6iii—Ba1—O568.7 (2)C6—O7—Ni1125.6 (7)
O11—Ba1—O4iv62.9 (2)C6—O7—Ba1viii94.9 (6)
O11i—Ba1—O4iv69.6 (2)Ni1—O7—Ba1viii138.9 (3)
O4ii—Ba1—O4iv82.09 (17)C6—O8—Ba1viii93.5 (6)
O1—Ba1—O4iv132.5 (2)Ni1—O9—H9A100.4
O6iii—Ba1—O4iv96.5 (2)Ni1—O9—H9B118.7
O5—Ba1—O4iv156.2 (2)H9A—O9—H9B116.8
O11—Ba1—O7v71.8 (2)Ni1—O10—H10A102.2
O11i—Ba1—O7v141.8 (2)Ni1—O10—H10B104.9
O4ii—Ba1—O7v90.8 (2)H10A—O10—H10B117.2
O1—Ba1—O7v77.9 (2)Ba1—O11—Ba1iii105.4 (2)
O6iii—Ba1—O7v137.2 (2)Ba1—O11—H11A105.6
O5—Ba1—O7v124.2 (2)Ba1iii—O11—H11A82.5
O4iv—Ba1—O7v79.4 (2)Ba1—O11—H11B106.0
O11—Ba1—O8v108.6 (2)Ba1iii—O11—H11B136.7
O11i—Ba1—O8v137.9 (2)H11A—O11—H11B116.3
O4ii—Ba1—O8v75.8 (2)O2—C1—O1124.2 (10)
O1—Ba1—O8v68.5 (2)O2—C1—C2118.0 (10)
O6iii—Ba1—O8v140.5 (2)O1—C1—C2117.7 (10)
O5—Ba1—O8v83.3 (2)C3—C2—C1113.8 (9)
O4iv—Ba1—O8v117.8 (2)C3—C2—H2A108.8
O7v—Ba1—O8v44.3 (2)C1—C2—H2A108.8
O11—Ba1—C6v87.9 (2)C3—C2—H2B108.8
O11i—Ba1—C6v149.8 (3)C1—C2—H2B108.8
O4ii—Ba1—C6v86.8 (2)H2A—C2—H2B107.7
O1—Ba1—C6v67.8 (2)O3—C3—O4121.1 (11)
O6iii—Ba1—C6v140.2 (2)O3—C3—C2117.8 (9)
O5—Ba1—C6v102.4 (2)O4—C3—C2121.1 (11)
O4iv—Ba1—C6v100.7 (2)O6—C4—O5124.4 (10)
O7v—Ba1—C6v22.5 (2)O6—C4—C5115.3 (9)
O8v—Ba1—C6v22.6 (2)O5—C4—C5120.2 (9)
O3—Ni1—O5172.2 (3)C6—C5—C4118.9 (10)
O3—Ni1—O189.4 (3)C6—C5—H5A107.6
O5—Ni1—O192.2 (3)C4—C5—H5A107.6
O3—Ni1—O788.7 (3)C6—C5—H5B107.6
O5—Ni1—O790.1 (3)C4—C5—H5B107.6
O1—Ni1—O7176.4 (3)H5A—C5—H5B107.0
O3—Ni1—O996.1 (3)O7—C6—O8123.1 (10)
O5—Ni1—O991.6 (3)O7—C6—C5119.3 (10)
O1—Ni1—O987.6 (3)O8—C6—C5117.5 (10)
O7—Ni1—O989.5 (3)O7—C6—Ba1viii62.6 (5)
O3—Ni1—O1087.6 (3)O8—C6—Ba1viii63.9 (5)
O5—Ni1—O1084.9 (3)C5—C6—Ba1viii157.9 (7)
Symmetry codes: (i) x, y+1, z1/2; (ii) x+1/2, y+3/2, z1/2; (iii) x, y+1, z+1/2; (iv) x+1/2, y1/2, z; (v) x+1/2, y+3/2, z+1/2; (vi) x1/2, y+3/2, z+1/2; (vii) x1/2, y+1/2, z; (viii) x1/2, y+3/2, z1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O9—H9A···O2ix0.851.852.672 (11)163
O11—H11A···O3v0.851.792.622 (11)166
O11—H11B···O20.851.852.677 (10)162
O9—H9B···O8v0.852.122.903 (10)153
O10—H10A···O8x0.852.072.886 (10)160
O10—H10B···O6iii0.851.922.772 (10)176
Symmetry codes: (iii) x, y+1, z+1/2; (v) x+1/2, y+3/2, z+1/2; (ix) x, y, z1; (x) x, y, z+1.

Experimental details

Crystal data
Chemical formula[BaNi(C3H2O4)2(H2O)3]
Mr454.19
Crystal system, space groupMonoclinic, Cc
Temperature (K)294
a, b, c (Å)12.177 (2), 13.842 (3), 7.1502 (14)
β (°) 91.17 (3)
V3)1204.9 (4)
Z4
Radiation typeMo Kα
µ (mm1)4.86
Crystal size (mm)0.12 × 0.10 × 0.06
Data collection
DiffractometerRigaku Saturn
diffractometer
Absorption correctionMulti-scan
(Jacobson, 1998)
Tmin, Tmax0.558, 0.738
No. of measured, independent and
observed [I > 2σ(I)] reflections
3369, 1432, 1424
Rint0.026
(sin θ/λ)max1)0.595
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.042, 0.099, 1.09
No. of reflections1432
No. of parameters173
No. of restraints2
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)1.23, 0.65
Absolute structureFlack (1983), 365 Friedel pairs
Absolute structure parameter0.18 (6)

Computer programs: CrystalClear (Rigaku/MSC, 2005), SHELXTL (Bruker, 2001).

Selected geometric parameters (Å, º) top
Ba1—O112.724 (10)Ba1—O8v2.911 (7)
Ba1—O11i2.729 (6)Ba1—Ni13.8059 (14)
Ba1—O4ii2.778 (7)Ni1—O31.989 (6)
Ba1—O12.794 (7)Ni1—O52.033 (7)
Ba1—O6iii2.796 (6)Ni1—O12.045 (8)
Ba1—O52.825 (7)Ni1—O72.052 (8)
Ba1—O4iv2.857 (7)Ni1—O92.082 (7)
Ba1—O7v2.885 (7)Ni1—O102.117 (7)
O2—C1—O1124.2 (10)O6—C4—O5124.4 (10)
O3—C3—O4121.1 (11)O7—C6—O8123.1 (10)
Symmetry codes: (i) x, y+1, z1/2; (ii) x+1/2, y+3/2, z1/2; (iii) x, y+1, z+1/2; (iv) x+1/2, y1/2, z; (v) x+1/2, y+3/2, z+1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O9—H9A···O2vi0.851.852.672 (11)163.0
O11—H11A···O3v0.851.792.622 (11)165.7
O11—H11B···O20.851.852.677 (10)162.2
O9—H9B···O8v0.852.122.903 (10)152.8
O10—H10A···O8vii0.852.072.886 (10)159.8
O10—H10B···O6iii0.851.922.772 (10)175.9
Symmetry codes: (iii) x, y+1, z+1/2; (v) x+1/2, y+3/2, z+1/2; (vi) x, y, z1; (vii) x, y, z+1.
 

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