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Acta Cryst. (2009). E65, m29    [ doi:10.1107/S1600536808040774 ]

catena-Poly[[trimethyltin(IV)]-[mu]-2,5-difluorobenzoato-[kappa]2O:O']

L. Wen, H. Yin, W. Li and D. Wang

Abstract top

In the title polymeric coordination compound, [Sn(CH3)3(C7H3F2O2)]n, the Sn atom exhibits a distorted trigonal-bipyramidal coordination geometry with the carboxylate O atoms in the axial positions and the equatorial positions occupied by the methyl groups. The two Sn-O bond lengths are 2.225 (5) and 2.410 (6) Å.

Comment top

In recent years the organotin derivatives have attracted considerable attention due to a significant antimicrobial properties as well as antitumor activities. Studies on organotin complexes containing carboxylate ligands with an additional donor atom (e.g N, S or F) that is available for coordinating to Sn atom have revealed that new structural types may lead to different activities. We have therefore synthesized the title compound, and present its crystal structure here. The molecular structure of the compound is shown in Fig.1 The Sn atom, assumes a distorted trigonal bipyramidal coordination geometry, provided by three methyl groups at the equatorial positions and two carboxylate groups at the axial positions. The Sn—O bond lengths in the compound (Table 1), are similar to those found in related organotin carboxylates (Wang et al., 2007). In the crystal packing, molecules are linked by intermolecular C—H···F hydrogen bonds (Fig.2, Table 1,)

Related literature top

For a related structure, see: Wang et al. (2007).

Experimental top

The reaction was carried out under nitrogen atmosphere. 2,5-Difluorobenzoic acid (1 mmol) and sodium ethoxide (1.2 mmol) were added to a stirred solution of benzene (30 ml) in a Schlenk flask and stirred for 0.5 h. Trimethyltin chloride (1 mmol) was then added to the reactor and the reaction mixture was stirred for 12 h at room temperature. The resulting clear solution was evaporated under vacuum. The product was crystallized from dichloromethane/methanol (1:1) to yield colourless block crystals (yield 83%. m.p.393K). Anal. Calcd (%) for C10H12F2O2Sn(Mr = 320.91): C, 37.43; H, 3.77; F, 11.84; Sn, 36.99. Found (%): C, 37.39; H, 3.86; F, 11.78; Sn, 36.89.

Refinement top

The H atoms were positioned geometrically, with methyl C—H distances of 0.96 Å and aromatic C—H distances of 0.93 Å, and refined as riding on their parent atoms, with Uiso(H) = 1.2 Ueq(C, O) or 1.5 Ueq(C) for the methyl group.

Computing details top

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the compound, showing 50% probability displacement ellipsoids. H atoms have been omitted for clarity. Symmetry codes: (A) = x - 1/2,-y + 3/2,-z + 1/4, (B) = x + 1/2,-y + 3/2,-z + 1/4
catena-Poly[[trimethyltin(IV)]-µ-2,5-difluorobenzoato-κ2O:O'] top
Crystal data top
[Sn(CH3)3(C7H3F2O2)]Dx = 1.752 Mg m−3
Mr = 320.91Mo Kα radiation, λ = 0.71073 Å
Tetragonal, P43212Cell parameters from 5675 reflections
Hall symbol: P 4nw 2abwθ = 2.2–26.4°
a = 9.8857 (9) ŵ = 2.11 mm−1
c = 24.896 (2) ÅT = 298 K
V = 2433.0 (4) Å3Block, colourless
Z = 80.38 × 0.29 × 0.27 mm
F(000) = 1248
Data collection top
Siemens SMART CCD
diffractometer		2152 independent reflections
Radiation source: fine-focus sealed tube1996 reflections with I > 2σ(I)
graphiteRint = 0.034
φ and ω scansθmax = 25.0°, θmin = 2.2°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		h = −11→11
Tmin = 0.502, Tmax = 0.600k = −11→7
10078 measured reflectionsl = −16→29
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)] = 0.036H-atom parameters constrained
wR(F2) = 0.107 w = 1/[σ2(Fo2) + (0.066P)2 + 4.861P]
where P = (Fo2 + 2Fc2)/3
S = 1.00(Δ/σ)max < 0.001
2152 reflectionsΔρmax = 0.54 e Å−3
136 parametersΔρmin = −0.45 e Å−3
0 restraintsAbsolute structure: Flack (1983)
Primary atom site location: structure-invariant direct methodsFlack parameter: −0.01 (8)
Crystal data top
[Sn(CH3)3(C7H3F2O2)]Z = 8
Mr = 320.91Mo Kα radiation
Tetragonal, P43212µ = 2.11 mm−1
a = 9.8857 (9) ÅT = 298 K
c = 24.896 (2) Å0.38 × 0.29 × 0.27 mm
V = 2433.0 (4) Å3
Data collection top
Siemens SMART CCD
diffractometer		2152 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		1996 reflections with I > 2σ(I)
Tmin = 0.502, Tmax = 0.600Rint = 0.034
10078 measured reflectionsθmax = 25.0°
Refinement top
R[F2 > 2σ(F2)] = 0.036H-atom parameters constrained
wR(F2) = 0.107Δρmax = 0.54 e Å−3
S = 1.00Δρmin = −0.45 e Å−3
2152 reflectionsAbsolute structure: Flack (1983)
136 parametersFlack parameter: −0.01 (8)
0 restraints
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Sn10.79786 (5)0.82634 (5)0.11522 (2)0.05163 (18)
F11.1717 (7)1.1333 (7)0.1597 (3)0.111 (2)
F21.4123 (8)1.0943 (8)−0.0335 (3)0.131 (3)
O10.9583 (5)0.9696 (5)0.0890 (2)0.0632 (14)
O21.1085 (6)0.8095 (6)0.1065 (3)0.0786 (18)
C11.0763 (7)0.9249 (7)0.0922 (3)0.0552 (19)
C21.1900 (8)1.0242 (7)0.0773 (3)0.0561 (18)
C31.2313 (10)1.1239 (11)0.1101 (4)0.080 (3)
C41.3367 (11)1.2144 (9)0.0992 (5)0.089 (3)
H41.36491.27870.12400.107*
C51.3953 (9)1.2021 (11)0.0498 (5)0.082 (3)
H51.46351.26150.03950.098*
C61.3539 (10)1.1028 (11)0.0153 (4)0.081 (3)
C71.2516 (10)1.0141 (11)0.0269 (4)0.078 (3)
H71.22400.94950.00200.093*
C80.6502 (9)0.9694 (8)0.0912 (3)0.067 (2)
H8A0.68491.02270.06210.100*
H8B0.62871.02740.12100.100*
H8C0.57000.92290.07970.100*
C90.8458 (10)0.6721 (11)0.0603 (4)0.081 (3)
H9A0.76450.62610.04970.122*
H9B0.90650.60880.07690.122*
H9C0.88820.71080.02920.122*
C100.8626 (9)0.8328 (10)0.1959 (3)0.070 (2)
H10A0.91120.75140.20430.105*
H10B0.78540.84050.21910.105*
H10C0.92070.90950.20110.105*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Sn10.0368 (3)0.0477 (3)0.0704 (3)0.0054 (2)−0.0009 (2)0.0029 (2)
F10.121 (6)0.108 (5)0.103 (4)−0.027 (4)0.039 (4)−0.022 (4)
F20.138 (6)0.136 (6)0.120 (5)0.010 (5)0.067 (5)0.039 (4)
O10.040 (3)0.047 (3)0.102 (4)0.009 (2)0.009 (3)0.020 (3)
O20.054 (3)0.054 (3)0.128 (5)0.005 (3)−0.001 (3)0.029 (4)
C10.031 (3)0.047 (4)0.087 (5)−0.004 (3)0.012 (3)0.014 (4)
C20.033 (3)0.046 (4)0.089 (5)0.005 (3)0.003 (4)0.015 (4)
C30.063 (6)0.083 (7)0.094 (7)0.012 (5)0.020 (5)0.004 (6)
C40.100 (8)0.048 (5)0.119 (8)−0.007 (5)0.014 (6)0.007 (5)
C50.046 (5)0.067 (6)0.133 (9)0.001 (5)0.013 (5)0.035 (6)
C60.058 (5)0.087 (7)0.099 (7)0.012 (5)0.025 (5)0.039 (6)
C70.067 (6)0.089 (7)0.077 (6)0.006 (5)0.011 (5)0.026 (5)
C80.062 (5)0.050 (5)0.088 (5)0.013 (4)−0.004 (4)0.007 (4)
C90.074 (6)0.092 (7)0.078 (6)0.025 (6)−0.012 (5)−0.009 (5)
C100.068 (5)0.074 (6)0.068 (5)0.008 (4)−0.003 (4)−0.004 (4)
Geometric parameters (Å, °) top
Sn1—C92.103 (9)C4—H40.9300
Sn1—C102.110 (8)C5—C61.366 (15)
Sn1—C82.118 (7)C5—H50.9300
Sn1—O12.225 (5)C6—C71.369 (14)
Sn1—O2i2.410 (6)C7—H70.9300
F1—C31.373 (11)C8—H8A0.9600
F2—C61.349 (11)C8—H8B0.9600
O1—C11.250 (9)C8—H8C0.9600
O2—C11.237 (9)C9—H9A0.9600
O2—Sn1ii2.410 (6)C9—H9B0.9600
C1—C21.537 (10)C9—H9C0.9600
C2—C31.344 (13)C10—H10A0.9600
C2—C71.399 (12)C10—H10B0.9600
C3—C41.399 (14)C10—H10C0.9600
C4—C51.365 (14)
C9—Sn1—C10125.0 (4)C6—C5—H5119.9
C9—Sn1—C8117.1 (4)F2—C6—C5118.8 (10)
C10—Sn1—C8117.2 (3)F2—C6—C7117.7 (11)
C9—Sn1—O196.3 (3)C5—C6—C7123.4 (10)
C10—Sn1—O192.5 (3)C6—C7—C2117.7 (11)
C8—Sn1—O189.1 (3)C6—C7—H7121.2
C9—Sn1—O2i87.8 (3)C2—C7—H7121.2
C10—Sn1—O2i88.5 (3)Sn1—C8—H8A109.5
C8—Sn1—O2i85.4 (3)Sn1—C8—H8B109.5
O1—Sn1—O2i174.15 (19)H8A—C8—H8B109.5
C1—O1—Sn1114.9 (4)Sn1—C8—H8C109.5
C1—O2—Sn1ii142.9 (5)H8A—C8—H8C109.5
O2—C1—O1125.8 (6)H8B—C8—H8C109.5
O2—C1—C2118.1 (6)Sn1—C9—H9A109.5
O1—C1—C2116.2 (6)Sn1—C9—H9B109.5
C3—C2—C7117.7 (8)H9A—C9—H9B109.5
C3—C2—C1123.0 (8)Sn1—C9—H9C109.5
C7—C2—C1119.3 (8)H9A—C9—H9C109.5
C2—C3—F1117.8 (9)H9B—C9—H9C109.5
C2—C3—C4125.3 (9)Sn1—C10—H10A109.5
F1—C3—C4116.8 (10)Sn1—C10—H10B109.5
C5—C4—C3115.7 (10)H10A—C10—H10B109.5
C5—C4—H4122.1Sn1—C10—H10C109.5
C3—C4—H4122.1H10A—C10—H10C109.5
C4—C5—C6120.1 (9)H10B—C10—H10C109.5
C4—C5—H5119.9
C9—Sn1—O1—C1−58.5 (6)C1—C2—C3—F12.4 (13)
C10—Sn1—O1—C167.1 (6)C7—C2—C3—C4−3.8 (15)
C8—Sn1—O1—C1−175.6 (7)C1—C2—C3—C4178.1 (9)
Sn1ii—O2—C1—O1−166.0 (7)C2—C3—C4—C53.6 (16)
Sn1ii—O2—C1—C213.5 (15)F1—C3—C4—C5179.3 (8)
Sn1—O1—C1—O22.8 (12)C3—C4—C5—C6−2.5 (15)
Sn1—O1—C1—C2−176.8 (5)C4—C5—C6—F2179.0 (9)
O2—C1—C2—C3−103.1 (10)C4—C5—C6—C72.0 (16)
O1—C1—C2—C376.4 (11)F2—C6—C7—C2−179.2 (8)
O2—C1—C2—C778.8 (11)C5—C6—C7—C2−2.1 (15)
O1—C1—C2—C7−101.7 (9)C3—C2—C7—C62.9 (13)
C7—C2—C3—F1−179.5 (8)C1—C2—C7—C6−178.9 (8)
Symmetry codes: (i) x−1/2, −y+3/2, −z+1/4; (ii) x+1/2, −y+3/2, −z+1/4.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C5—H5···F1iii0.932.633.336 (13)133
Symmetry codes: (iii) x+1/2, −y+5/2, −z+1/4.
Table 1
Selected geometric parameters (Å, °) top
Sn1—C92.103 (9)Sn1—O12.225 (5)
Sn1—C102.110 (8)Sn1—O2i2.410 (6)
Sn1—C82.118 (7)
O1—Sn1—O2i174.15 (19)
Symmetry codes: (i) x−1/2, −y+3/2, −z+1/4.
Acknowledgements top

We acknowledge the National Natural Foundation of China (grant No. 20771053) and, the Natural Science Foundation of Shandong Province (2005ZX09) for financial support.

references
References top

Flack, H. D. (1983). Acta Cryst. A39, 876–881.

Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.

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

Wang, H., Yin, H. & Wang, D. (2007). Acta Cryst. E63, m2958.