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Acta Cryst. (2008). E64, m56    [ doi:10.1107/S1600536807058230 ]

catena-Poly[[[tetraaquasamarium(III)]-di-[mu]-isonicotinato-[kappa]4O:O'] chloride]

K.-J. Wu, L.-Z. Cai, G. Xu, G.-W. Zhou and G.-C. Guo

Abstract top

In the structure of the title compound, {[Sm(C6H4NO2)2(H2O)4]Cl}n, the unique SmIII atom lies on a crystallographic twofold axis and is eight-coordinated by four O atoms from four isonicotinate ligands and four water molecules in a slightly distorted square-antiprismatic coodination environment. The SmIII atoms are bridged by two carboxylate groups of two isonicotinate ligands, forming an extended chain along the c-axis direction. These chains are cross-linked through hydrogen bonds, forming a three-dimensional framework, with channels which accommodate the chloride anions.

Comment top

Much attention has been devoted to the research on lanthanide metal polynuclear compounds because of their magnetic and luminescent properties. Most of these types of compounds were synthesized by the reaction of rare-earth metal ions with bi- or multi-dentate ligands such as nicotinic acid (Starynowicz, 1993; Starynowicz, 1991; Kay et al., 1972; Ma et al., 1996), isonicotinic acid (Ma et al., 1999; Zeng et al., 2000) and isonicotinic acid N-oxide (Mao et al., 1998). In the course of our research in this area, our extended group has reported several such compounds with different bridging ligands (Zhang et al., 1999; Cui et al., 1999; Cai et al., 2003). Herein, we report the synthesis and crystal structure of a new samarium complex with isonicotinic ligand namely {[Sm(C6H4NO2)2(H2O)4]Cl}n.

The structure of the title compound, contains an extended [Sm(C6H4NO2)2(H2O)4]+ cationic chains and Cl- anions. The SmIII ion is eight-coordinated by four O atoms belonging to four different isonicotinic ligands (Sm—O, average 2.363 (2) Å) and four water molecules (Sm—O, average 2.489 (2) Å) (Fig. 1). The coordination geometry of the SmIII cation is best described in terms of its position at the center of a slightly distorted square antiprism. One of the square faces is comprised by O1, O1A, O2W and O2WA atoms with a mean deviation of 0.272 Å and the other one is defined by atoms O2, O2A, O1W and O1WA atoms with a mean deviation of 0.506 Å. The Sm atoms are bridged each other by two syn-syn µ-O,O'-carboxylate groups of isonicotinic ligands to form an extended chain along the c axis. This geometry is similar to that found in [{Eu(L)2(H2O)4}]n.nH2O (L = isonicotinic acid N-oxide) (Mao et al., 1998) and [La(C6H4NO2)2(H2O)4](NO3) (Cai et al., 2003), but differs from those found in Ln(isonicotinate)3(H2O)2 (Ln = Ce, Pr, Nd, Sm, Eu, Tb) (Ma et al., 1999) in which the LnIII atoms are bridged by four syn-syn µ-O,O'-carboxylate groups of isonicotinic ligands (Ln = Ce, Pr, Nd) or coordinated by both two syn-syn µ-O,O'-carboxySmte groups and chelating carboxylate groups of isonicotinic ligands (Ln = Sm, Eu, Tb). To the best of our knowledge, the arrangement in present complex is rare in the lanthanide analogs.

The inter-chain hydrogen bonds, which are created by the uncoordinated nitrogen atoms of isonicotinic ligands and coordinated water molecules between neighboring chains link the cationic chains into a three-dimensional network with channels along the c axis in which the chloride anions are located, as shown in Fig. 2. The other intermolecular hydrogen bonds are formed by the chloride anions and coordinated water molecules (see hydrogen bond geometry table).

Related literature top

For related literature, see: Cai et al. (2003); Cui et al. (1999); Kay et al. (1972); Ma et al. (1996, 1999); Mao et al. (1998); Starynowicz (1991, 1993); Zeng et al. (2000); Zhang et al. (1999).

Experimental top

The title complex was prepared by mixing a 1:1 molar ratio of SmCl3.6(H2O) (37 mg, 0.1 mmol) and C5H4NCOOH (12 mg, 0.1 mmol) in 10 ml mixed solvent of H2O/EtOH (v:v = 1:1). The pH value of the solution was adjusted to 5.8 with NH3. H2O. The reaction mixture was filtered and colorless single crystals suitable for X-ray analysis were obtained by slow evaporation of the solvent.

Refinement top

Water H atoms were located in a difference Fourier map and refined as riding in their as-found positions, with Uiso(H) =1.5Ueq(O). H atoms bonded to C atoms were placed in calclulated positions with C—H = 0.93Å and Uiso(H) = 1.2Ueq(C).

Computing details top

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1994); data reduction: SAINT (Siemens, 1994); program(s) used to solve structure: SHELXTL (Siemens, 1995); program(s) used to refine structure: SHELXTL (Siemens, 1995); molecular graphics: SHELXTL (Siemens, 1995); software used to prepare material for publication: SHELXTL (Siemens, 1995).

Figures top
[Figure 1] Fig. 1. View of part of the one-dimensional cationic chain of the title compound. The Cl anions are not shown. Displacement ellipsoids are shown at the 30% probability level {symmetry code: (A) 1 - x,y,0.5 - z].
[Figure 2] Fig. 2. Packing of the title compound. Dashed lines represent the donor-acceptor relatioships of the hydrogen bonds but H atoms are not shown.
catena-Poly[[[tetraaquasamarium(III)]-di-µ-isoniconitinato-κ4O:O'] chloride] top
Crystal data top
[Sm(C6H4NO2)2(H2O)4]ClDx = 1.863 Mg m−3
Mr = 502.07Melting point: not measured K
Orthorhombic, PbcnMo Kα radiation
λ = 0.71073 Å
Hall symbol: -P 2n 2abCell parameters from 3359 reflections
a = 8.9713 (4) Åθ = 2.1–25.1º
b = 19.6698 (9) ŵ = 3.47 mm−1
c = 10.1459 (5) ÅT = 293 (2) K
V = 1790.38 (14) Å3Block, green
Z = 40.50 × 0.20 × 0.20 mm
F000 = 980
Data collection top
Siemens SMART CCD
diffractometer		1572 independent reflections
Radiation source: fine-focus sealed tube1326 reflections with I > 2σ(I)
Monochromator: graphiteRint = 0.031
T = 293(2) Kθmax = 25.1º
ω scansθmin = 2.1º
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		h = −10→10
Tmin = 0.216, Tmax = 0.500k = −23→11
5176 measured reflectionsl = −10→12
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)] = 0.026H atoms treated by a mixture of
independent and constrained refinement
wR(F2) = 0.072  w = 1/[σ2(Fo2) + (0.0464P)2 + 4.3692P]
where P = (Fo2 + 2Fc2)/3
S = 0.98(Δ/σ)max = 0.001
1572 reflectionsΔρmax = 0.79 e Å−3
127 parametersΔρmin = −0.84 e Å−3
6 restraintsExtinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0199 (3)
Crystal data top
[Sm(C6H4NO2)2(H2O)4]ClV = 1790.38 (14) Å3
Mr = 502.07Z = 4
Orthorhombic, PbcnMo Kα
a = 8.9713 (4) ŵ = 3.47 mm−1
b = 19.6698 (9) ÅT = 293 (2) K
c = 10.1459 (5) Å0.50 × 0.20 × 0.20 mm
Data collection top
Siemens SMART CCD
diffractometer		1572 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		1326 reflections with I > 2σ(I)
Tmin = 0.216, Tmax = 0.500Rint = 0.031
5176 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0266 restraints
wR(F2) = 0.072H atoms treated by a mixture of
independent and constrained refinement
S = 0.98Δρmax = 0.79 e Å−3
1572 reflectionsΔρmin = −0.84 e Å−3
127 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Sm10.00000.488380 (7)0.25000.02081 (5)
Cl10.50000.55724 (6)0.25000.0505 (3)
O1W0.24788 (18)0.44913 (8)0.16326 (16)0.0356 (4)
O10.10167 (18)0.43193 (8)0.60241 (16)0.0345 (4)
O20.0437 (2)0.39771 (8)0.39964 (16)0.0366 (4)
O2W−0.19848 (17)0.54040 (10)0.11577 (15)0.0394 (5)
N10.1463 (3)0.17887 (11)0.6303 (2)0.0474 (6)
C10.1948 (3)0.22974 (14)0.7048 (3)0.0468 (7)
H1A0.24480.21910.78240.056*
C50.0741 (4)0.19498 (12)0.5206 (3)0.0472 (8)
H2A0.03870.15990.46760.057*
C40.0487 (3)0.26104 (12)0.4810 (2)0.0359 (6)
H3A−0.00400.27010.40400.043*
C20.1755 (3)0.29747 (13)0.6739 (2)0.0368 (7)
H4A0.21060.33140.72970.044*
C30.1028 (2)0.31367 (11)0.5579 (2)0.0260 (5)
C60.0799 (3)0.38691 (10)0.5173 (2)0.0266 (5)
H2WA−0.2831 (6)0.5451 (13)0.1446 (8)0.039 (7)*
H1WA0.2846 (14)0.4110 (2)0.159 (2)0.053 (8)*
H1WB0.3149 (9)0.4764 (3)0.178 (3)0.077 (11)*
H2WB−0.2009 (14)0.5434 (16)0.0355 (5)0.066 (9)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Sm10.02907 (9)0.01576 (9)0.01760 (9)0.0000.00088 (6)0.000
Cl10.0344 (5)0.0528 (6)0.0644 (6)0.0000.0134 (4)0.000
O1W0.0404 (8)0.0241 (7)0.0422 (8)0.0090 (7)0.0000 (8)−0.0053 (7)
O10.0422 (8)0.0235 (7)0.0379 (8)0.0010 (7)0.0021 (8)−0.0083 (7)
O20.0557 (9)0.0238 (7)0.0304 (8)−0.0003 (8)−0.0067 (8)0.0085 (7)
O2W0.0336 (8)0.0587 (11)0.0260 (8)0.0099 (8)0.0036 (7)0.0054 (8)
N10.0580 (13)0.0274 (10)0.0568 (13)0.0088 (10)−0.0028 (12)0.0109 (10)
C10.0543 (15)0.0429 (15)0.0431 (13)0.0059 (13)−0.0134 (14)0.0158 (12)
C50.0631 (18)0.0236 (11)0.0550 (15)−0.0010 (13)−0.0030 (15)−0.0041 (12)
C40.0522 (13)0.0260 (11)0.0297 (12)−0.0010 (11)−0.0093 (12)0.0000 (10)
C20.0469 (14)0.0283 (12)0.0353 (12)0.0018 (11)−0.0082 (11)−0.0013 (11)
C30.0312 (11)0.0226 (10)0.0242 (10)0.0035 (9)0.0014 (9)0.0010 (8)
C60.0311 (12)0.0188 (9)0.0298 (11)−0.0001 (9)0.0035 (10)0.0017 (9)
Geometric parameters (Å, °) top
Sm1—O1i2.3519 (15)O2W—H2WA0.819 (6)
Sm1—O1ii2.3519 (16)O2W—H2WB0.817 (6)
Sm1—O22.3747 (16)N1—C51.326 (4)
Sm1—O2iii2.3747 (16)N1—C11.327 (4)
Sm1—O2Wiii2.4642 (16)C1—C21.379 (4)
Sm1—O2W2.4642 (16)C1—H1A0.9300
Sm1—O1Wiii2.5132 (16)C5—C41.379 (3)
Sm1—O1W2.5132 (16)C5—H2A0.9300
O1W—H1WA0.821 (6)C4—C31.384 (3)
O1W—H1WB0.820 (7)C4—H3A0.9300
O1—C61.252 (3)C2—C31.383 (3)
O1—Sm1i2.3519 (15)C2—H4A0.9300
O2—C61.255 (3)C3—C61.512 (3)
O1i—Sm1—O1ii96.41 (8)Sm1—O1W—H1WA131.0 (10)
O1i—Sm1—O299.06 (6)Sm1—O1W—H1WB112.5 (10)
O1ii—Sm1—O2147.52 (6)H1WA—O1W—H1WB108.2 (10)
O1i—Sm1—O2iii147.52 (6)C6—O1—Sm1i148.18 (15)
O1ii—Sm1—O2iii99.06 (6)C6—O2—Sm1141.07 (14)
O2—Sm1—O2iii82.65 (8)Sm1—O2W—H2WA121.3 (9)
O1i—Sm1—O2Wiii69.61 (6)Sm1—O2W—H2WB126.9 (13)
O1ii—Sm1—O2Wiii78.16 (6)H2WA—O2W—H2WB108.9 (10)
O2—Sm1—O2Wiii80.75 (6)C5—N1—C1117.2 (2)
O2iii—Sm1—O2Wiii141.67 (6)N1—C1—C2123.9 (3)
O1i—Sm1—O2W78.16 (6)N1—C1—H1A118.1
O1ii—Sm1—O2W69.61 (6)C2—C1—H1A118.1
O2—Sm1—O2W141.67 (6)N1—C5—C4123.4 (2)
O2iii—Sm1—O2W80.75 (6)N1—C5—H2A118.3
O2Wiii—Sm1—O2W130.93 (9)C4—C5—H2A118.3
O1i—Sm1—O1Wiii68.82 (5)C5—C4—C3118.9 (2)
O1ii—Sm1—O1Wiii140.43 (5)C5—C4—H3A120.6
O2—Sm1—O1Wiii72.03 (6)C3—C4—H3A120.6
O2iii—Sm1—O1Wiii81.20 (6)C1—C2—C3118.4 (2)
O2Wiii—Sm1—O1Wiii124.99 (5)C1—C2—H4A120.8
O2W—Sm1—O1Wiii71.44 (5)C3—C2—H4A120.8
O1i—Sm1—O1W140.43 (5)C2—C3—C4118.2 (2)
O1ii—Sm1—O1W68.82 (5)C2—C3—C6121.0 (2)
O2—Sm1—O1W81.20 (6)C4—C3—C6120.8 (2)
O2iii—Sm1—O1W72.03 (6)O1—C6—O2125.2 (2)
O2Wiii—Sm1—O1W71.44 (5)O1—C6—C3117.68 (19)
O2W—Sm1—O1W124.99 (5)O2—C6—C3117.10 (18)
O1Wiii—Sm1—O1W144.22 (7)
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, −y+1, z−1/2; (iii) −x, y, −z+1/2.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O1W—H1WA···N1iv0.821 (6)1.895 (7)2.711 (3)173 (2)
O1W—H1WB···Cl10.820 (7)2.411 (8)3.2267 (18)173 (2)
O2W—H2WA···Cl1v0.819 (6)2.233 (6)3.0465 (16)172.3 (8)
O2W—H2WB···O1Wvi0.817 (6)2.065 (7)2.873 (2)169.8 (12)
Symmetry codes: (iv) −x+1/2, −y+1/2, z−1/2; (v) x−1, y, z; (vi) −x, −y+1, −z.
Table 1
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O1W—H1WA···N1i0.821 (6)1.895 (7)2.711 (3)173 (2)
O1W—H1WB···Cl10.820 (7)2.411 (8)3.2267 (18)173 (2)
O2W—H2WA···Cl1ii0.819 (6)2.233 (6)3.0465 (16)172.3 (8)
O2W—H2WB···O1Wiii0.817 (6)2.065 (7)2.873 (2)169.8 (12)
Symmetry codes: (i) −x+1/2, −y+1/2, z−1/2; (ii) x−1, y, z; (iii) −x, −y+1, −z.
Acknowledgements top

We gratefully acknowledge the financial support of the NSF of Fujian Province (e0510028, 2006 J0275).

references
References top

Cai, L.-Z., Wang, M.-S., Zhou, G.-W., Guo, G.-C., Mao, J.-G. & Huang, J.-S. (2003). Acta Cryst. E59, m249–m251.

Cui, Y., Zheng, F.-K. & Huang, J.-S. (1999). Chem. Lett. 4, 281–282.

Kay, J., Moore, J. W. & Glick, M. D. (1972). Inorg. Chem. 11, 2818–2827.

Ma, L., Evans, O. R., Foxman, B. M. & Lin, W. B. (1999). Inorg. Chem. 38, 5837–5840.

Ma, J. F., Hu, N. H. & Ni, J. Z. (1996). Polyhedron, 15, 1797–1799.

Mao, J. G., Zhang, H. J., Ni, J. Z., Wang, S. B. & Mak, T. C. W. (1998). J. Chem. Cryst. 17, 3999–4009.

Sheldrick, G. M. (1996). SADABS. University of Goeltingen, German.

Siemens (1994). SAINTand SHELXTL. Siemens X-ray Instruments Inc., Madison, Wisconsin, USA.

Siemens (1995). SHELXTL. Version 5. Siemens X-ray Instruments Inc., Madison, Wisconsin, USA.

Siemens (1996). SMART. Siemens Siemens X-ray Instruments Inc., Madison, Wisconsin, USA.

Starynowicz, P. (1991). Acta Cryst. C47, 294–297.

Starynowicz, P. (1993). Acta Cryst. C49, 1895–1897.

Zeng, X.-R., Xu, Y., Xiong, R.-G., Zhang, L.-J. & You, X.-Z. (2000). Acta Cryst. C56, e325–e326.

Zhang, X., Cui, Y., Zheng, F.-K. & Huang, J.-S. (1999). Chem. Lett. pp. 1111–1112.