Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807041037/kp2132sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807041037/kp2132Isup2.hkl |
CCDC reference: 660164
A solution of 2-amino-ethanol (0.061 g, 1 mmol) and caustic potash (0.112 g, 2 mmol) in methanol (10 ml) was added slowly to a solution of 3,5-dibromo-2-hydroxybenzaldehyde (1 mmol, 0.280 g) in methanol (20 ml). The mixture was stirred for 1 h at 323 K, then added slowly to a solution of MnCl2 (2 mmol, 0.396 g) in methanol (10 ml). This mixture was stirred and refluxed for 2 h at 323 K. The solution was filtered and the filtrate was left to stand at room temperature. Deep purple suitable for X-ray diffraction were obtained in a yield of 38% (based on manganese).
H atoms of the water molecule were located in a difference Fourier map. The O—H distances were normalized to 0.85 Å and the H atoms were allowed to ride on the O atom, with Uiso(H) = 1.5 Ueq(O). All other H atoms were positioned geometrically and refined as riding, with C–H distances of 0.93–0.97 Å and Uiso(H) = 1.2 Ueq(C).
Interest on packing arrangements of halogenated compounds goes back many years to what Schmidt called the 'chloro effect', where the presence of chloro substituents on aromatic compounds frequently results in stacking arrangements with a short (ca 4 Å) crystallographic axis (Cohen et al., 1964; Zordan et al., 2005; Desiraju, 1989). The title compound, (I), contains the dibrominated ligand L- with two Br atoms accessible at the periphery of each ligand.
In (I) the MnIV atom is coordinated by two N and four O atoms from two different tridentate ligands L2- forming a distorted octahedral geometry (Fig. 1 and Table 1). The shortest Br···Br contacts (Zordan et al., 2005; Zaman et al., 2004; Sarma & Desiraju, 1986) are Br3i···Br3ii = 3.555 (5) Å, Br3i···Br4iii = 3.742 (5) Å, and Br4i···Br2iv = 3.631 (5) Å, [symmetry codes: (i) 1/2 - x, -1/2 - y, z; (ii) x, -1 + y, z; (iii) 1/4 + x,-1/4 - y, -1/4 + z; (iv) 1/4 - x, -3/4 - y, 1/4 + z]. The molecules of (I) are connected into a 3-D network through short Br···Br interactions, very strong O–H···O hydrogen bond and O–H···Br hydrogen bond (Table 2 and Fig. 2).
A similar manganese (II) complex also has a distorted octahedral geometry (Kessissoglou et al., 1986). For related literature, see: Cohen et al. (1964); Zordan et al. (2005); Desiraju (1989); Zaman et al. (2004); Sarma & Desiraju (1986).
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1997); software used to prepare material for publication: SHELXTL (Bruker, 1997).
C18H14Br4MnN2O4·0.5CH4O·H2O | Dx = 2.010 Mg m−3 |
Mr = 730.89 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, Fdd2 | Cell parameters from 4075 reflections |
a = 26.286 (4) Å | θ = 2.5–26.0° |
b = 32.908 (5) Å | µ = 7.20 mm−1 |
c = 11.1681 (17) Å | T = 293 K |
V = 9661 (2) Å3 | Block, deep purple |
Z = 16 | 0.18 × 0.14 × 0.13 mm |
F(000) = 5632 |
Bruker SMART CCD area-detector diffractometer | 4075 independent reflections |
Radiation source: fine-focus sealed tube | 3143 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
φ and ω scans | θmax = 26.0°, θmin = 2.5° |
Absorption correction: multi-scan SADABS (Sheldrick, 1996) | h = −32→14 |
Tmin = 0.357, Tmax = 0.455 | k = −38→38 |
8149 measured reflections | l = −13→12 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.133 | w = 1/[σ2(Fo2) + (0.0654P)2 + 43.5887P] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
4075 reflections | Δρmax = 1.09 e Å−3 |
290 parameters | Δρmin = −0.39 e Å−3 |
20 restraints | Absolute structure: Flack (1983), 1669 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.045 (19) |
C18H14Br4MnN2O4·0.5CH4O·H2O | V = 9661 (2) Å3 |
Mr = 730.89 | Z = 16 |
Orthorhombic, Fdd2 | Mo Kα radiation |
a = 26.286 (4) Å | µ = 7.20 mm−1 |
b = 32.908 (5) Å | T = 293 K |
c = 11.1681 (17) Å | 0.18 × 0.14 × 0.13 mm |
Bruker SMART CCD area-detector diffractometer | 4075 independent reflections |
Absorption correction: multi-scan SADABS (Sheldrick, 1996) | 3143 reflections with I > 2σ(I) |
Tmin = 0.357, Tmax = 0.455 | Rint = 0.029 |
8149 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.133 | w = 1/[σ2(Fo2) + (0.0654P)2 + 43.5887P] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | Δρmax = 1.09 e Å−3 |
4075 reflections | Δρmin = −0.39 e Å−3 |
290 parameters | Absolute structure: Flack (1983), 1669 Friedel pairs |
20 restraints | Absolute structure parameter: 0.045 (19) |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Mn1 | 0.04388 (5) | 0.25185 (4) | 0.55027 (13) | 0.0418 (3) | |
Br1 | 0.14995 (5) | 0.31726 (4) | 0.25588 (13) | 0.0797 (4) | |
Br2 | 0.21088 (5) | 0.16499 (5) | 0.07739 (14) | 0.1024 (5) | |
Br3 | 0.18568 (5) | 0.26672 (3) | 0.84250 (12) | 0.0769 (4) | |
Br4 | 0.09302 (5) | 0.40746 (4) | 1.02880 (13) | 0.0909 (5) | |
C1 | 0.1120 (3) | 0.2418 (3) | 0.3450 (9) | 0.045 (2) | |
C2 | 0.1451 (4) | 0.2600 (3) | 0.2601 (11) | 0.063 (3) | |
C3 | 0.1729 (4) | 0.2370 (4) | 0.1815 (12) | 0.074 (3) | |
H3 | 0.1939 | 0.2493 | 0.1253 | 0.089* | |
C4 | 0.1690 (5) | 0.1956 (4) | 0.1872 (11) | 0.073 (3) | |
C5 | 0.1366 (3) | 0.1763 (3) | 0.2602 (10) | 0.058 (3) | |
H5 | 0.1323 | 0.1483 | 0.2543 | 0.070* | |
C6 | 0.1091 (3) | 0.1988 (3) | 0.3463 (9) | 0.048 (2) | |
C7 | 0.0781 (3) | 0.1767 (3) | 0.4321 (10) | 0.049 (2) | |
H7 | 0.0756 | 0.1487 | 0.4238 | 0.059* | |
C8 | 0.0263 (4) | 0.1681 (3) | 0.6026 (11) | 0.062 (3) | |
H8A | 0.0481 | 0.1606 | 0.6690 | 0.075* | |
H8B | 0.0142 | 0.1435 | 0.5642 | 0.075* | |
C9 | −0.0180 (3) | 0.1932 (3) | 0.6464 (11) | 0.059 (3) | |
H9A | −0.0444 | 0.1944 | 0.5857 | 0.071* | |
H9B | −0.0323 | 0.1813 | 0.7183 | 0.071* | |
C10 | 0.0955 (3) | 0.3013 (3) | 0.7461 (9) | 0.046 (2) | |
C11 | 0.1330 (4) | 0.3063 (3) | 0.8315 (10) | 0.059 (3) | |
C12 | 0.1339 (4) | 0.3363 (3) | 0.9175 (8) | 0.052 (2) | |
H12 | 0.1592 | 0.3375 | 0.9758 | 0.062* | |
C13 | 0.0937 (4) | 0.3656 (3) | 0.9116 (10) | 0.061 (3) | |
C14 | 0.0584 (3) | 0.3634 (3) | 0.8245 (9) | 0.051 (2) | |
H14 | 0.0334 | 0.3834 | 0.8202 | 0.061* | |
C15 | 0.0581 (3) | 0.3327 (3) | 0.7422 (8) | 0.045 (2) | |
C16 | 0.0194 (3) | 0.3353 (3) | 0.6506 (9) | 0.046 (2) | |
H16 | −0.0019 | 0.3579 | 0.6536 | 0.055* | |
C17 | −0.0327 (4) | 0.3176 (3) | 0.4826 (10) | 0.063 (3) | |
H17A | −0.0575 | 0.3347 | 0.5224 | 0.075* | |
H17B | −0.0207 | 0.3317 | 0.4117 | 0.075* | |
C18 | −0.0569 (3) | 0.2783 (3) | 0.4473 (10) | 0.057 (3) | |
H18A | −0.0751 | 0.2671 | 0.5153 | 0.069* | |
H18B | −0.0813 | 0.2831 | 0.3838 | 0.069* | |
N1 | 0.0543 (2) | 0.1932 (2) | 0.5168 (8) | 0.0453 (17) | |
N2 | 0.0111 (3) | 0.3096 (2) | 0.5650 (7) | 0.0466 (17) | |
O1 | 0.0876 (2) | 0.26594 (18) | 0.4206 (6) | 0.0494 (15) | |
O2 | 0.0007 (2) | 0.23280 (19) | 0.6711 (6) | 0.0564 (17) | |
O3 | 0.0963 (3) | 0.2718 (2) | 0.6697 (7) | 0.0630 (19) | |
O4 | −0.0208 (2) | 0.2505 (2) | 0.4085 (6) | 0.0536 (16) | |
O5 | −0.0213 (4) | 0.4752 (5) | 0.7733 (17) | 0.081 (4) | 0.50 |
H5A | −0.0383 | 0.4657 | 0.7150 | 0.121* | 0.50 |
C19 | 0.0282 (5) | 0.4748 (6) | 0.759 (2) | 0.068 (6) | 0.50 |
H19A | 0.0378 | 0.4953 | 0.7022 | 0.102* | 0.50 |
H19B | 0.0388 | 0.4487 | 0.7305 | 0.102* | 0.50 |
H19C | 0.0444 | 0.4803 | 0.8346 | 0.102* | 0.50 |
O1W | −0.0549 (6) | 0.4146 (5) | 0.7965 (13) | 0.172 (6) | |
H1WA | −0.0572 | 0.4403 | 0.8021 | 0.257* | |
H1WB | −0.0857 | 0.4111 | 0.7760 | 0.257* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Mn1 | 0.0489 (6) | 0.0388 (7) | 0.0378 (7) | 0.0059 (6) | −0.0051 (6) | −0.0072 (6) |
Br1 | 0.0789 (7) | 0.0729 (8) | 0.0871 (9) | −0.0109 (6) | 0.0038 (6) | 0.0148 (7) |
Br2 | 0.0957 (9) | 0.1375 (13) | 0.0739 (10) | 0.0320 (8) | 0.0151 (7) | −0.0354 (9) |
Br3 | 0.0814 (7) | 0.0637 (7) | 0.0855 (9) | 0.0061 (6) | −0.0389 (6) | −0.0095 (6) |
Br4 | 0.0996 (8) | 0.0844 (8) | 0.0886 (11) | −0.0175 (7) | 0.0070 (7) | −0.0550 (8) |
C1 | 0.040 (4) | 0.055 (6) | 0.041 (5) | 0.003 (4) | −0.003 (4) | −0.017 (5) |
C2 | 0.080 (7) | 0.062 (6) | 0.046 (7) | 0.002 (5) | −0.002 (5) | 0.004 (5) |
C3 | 0.061 (6) | 0.108 (11) | 0.054 (8) | −0.008 (6) | −0.013 (5) | 0.003 (7) |
C4 | 0.085 (8) | 0.092 (9) | 0.043 (7) | 0.018 (7) | −0.013 (6) | −0.026 (6) |
C5 | 0.050 (5) | 0.075 (7) | 0.049 (6) | 0.012 (5) | 0.008 (5) | −0.020 (6) |
C6 | 0.035 (4) | 0.060 (6) | 0.050 (6) | 0.001 (4) | 0.003 (4) | −0.013 (5) |
C7 | 0.056 (5) | 0.029 (5) | 0.063 (7) | 0.008 (4) | −0.003 (5) | −0.011 (5) |
C8 | 0.069 (6) | 0.059 (6) | 0.059 (7) | −0.012 (5) | 0.002 (5) | 0.003 (5) |
C9 | 0.048 (5) | 0.062 (7) | 0.067 (7) | −0.008 (5) | −0.004 (5) | 0.010 (5) |
C10 | 0.050 (5) | 0.032 (5) | 0.055 (6) | −0.006 (4) | −0.001 (4) | −0.001 (4) |
C11 | 0.077 (6) | 0.041 (5) | 0.058 (7) | −0.005 (4) | −0.012 (5) | −0.002 (5) |
C12 | 0.065 (6) | 0.052 (6) | 0.039 (6) | −0.018 (5) | −0.007 (4) | −0.012 (4) |
C13 | 0.064 (6) | 0.068 (7) | 0.050 (6) | −0.019 (5) | 0.010 (5) | −0.028 (5) |
C14 | 0.056 (5) | 0.047 (5) | 0.050 (6) | 0.006 (4) | 0.009 (4) | −0.011 (4) |
C15 | 0.054 (5) | 0.037 (5) | 0.043 (6) | −0.012 (4) | 0.009 (4) | −0.010 (4) |
C16 | 0.058 (5) | 0.034 (5) | 0.045 (6) | 0.006 (4) | 0.000 (4) | 0.003 (4) |
C17 | 0.072 (6) | 0.061 (7) | 0.056 (7) | 0.023 (5) | −0.018 (5) | −0.003 (5) |
C18 | 0.043 (5) | 0.080 (7) | 0.050 (6) | 0.008 (5) | −0.002 (4) | 0.001 (5) |
N1 | 0.034 (3) | 0.051 (4) | 0.050 (5) | 0.000 (3) | −0.005 (3) | −0.005 (4) |
N2 | 0.054 (4) | 0.044 (4) | 0.042 (5) | 0.009 (3) | −0.009 (3) | −0.004 (4) |
O1 | 0.044 (3) | 0.047 (4) | 0.057 (4) | 0.002 (3) | 0.006 (3) | 0.001 (3) |
O2 | 0.071 (4) | 0.055 (4) | 0.043 (4) | 0.008 (3) | −0.004 (3) | −0.005 (3) |
O3 | 0.074 (4) | 0.054 (4) | 0.061 (5) | 0.013 (3) | −0.020 (3) | −0.028 (4) |
O4 | 0.049 (3) | 0.057 (4) | 0.055 (4) | 0.012 (3) | −0.009 (3) | −0.007 (3) |
O5 | 0.057 (7) | 0.105 (10) | 0.080 (11) | 0.003 (7) | −0.002 (8) | 0.013 (9) |
C19 | 0.042 (9) | 0.074 (11) | 0.088 (14) | 0.019 (8) | 0.050 (9) | 0.032 (11) |
O1W | 0.214 (12) | 0.196 (12) | 0.105 (11) | −0.067 (10) | 0.020 (9) | 0.009 (9) |
Mn1—O2 | 1.871 (7) | C9—H9B | 0.9700 |
Mn1—O1 | 1.906 (7) | C10—O3 | 1.292 (11) |
Mn1—N1 | 1.984 (7) | C10—C11 | 1.381 (14) |
Mn1—O3 | 2.027 (7) | C10—C15 | 1.426 (12) |
Mn1—N2 | 2.094 (7) | C11—C12 | 1.377 (14) |
Mn1—O4 | 2.324 (6) | C12—C13 | 1.432 (14) |
Br1—C2 | 1.888 (10) | C12—H12 | 0.9300 |
Br2—C4 | 1.931 (11) | C13—C14 | 1.348 (14) |
Br3—C11 | 1.905 (10) | C14—C15 | 1.367 (13) |
Br4—C13 | 1.900 (9) | C14—H14 | 0.9300 |
C1—O1 | 1.326 (10) | C15—C16 | 1.446 (13) |
C1—C6 | 1.415 (13) | C16—N2 | 1.295 (12) |
C1—C2 | 1.419 (15) | C16—H16 | 0.9300 |
C2—C3 | 1.370 (17) | C17—C18 | 1.494 (14) |
C3—C4 | 1.368 (18) | C17—N2 | 1.496 (12) |
C3—H3 | 0.9300 | C17—H17A | 0.9700 |
C4—C5 | 1.339 (17) | C17—H17B | 0.9700 |
C5—C6 | 1.414 (13) | C18—O4 | 1.388 (11) |
C5—H5 | 0.9300 | C18—H18A | 0.9700 |
C6—C7 | 1.453 (14) | C18—H18B | 0.9700 |
C7—N1 | 1.257 (12) | O5—C19 | 1.312 (9) |
C7—H7 | 0.9300 | O5—H5A | 0.8501 |
C8—N1 | 1.464 (13) | C19—H19A | 0.9600 |
C8—C9 | 1.508 (14) | C19—H19B | 0.9600 |
C8—H8A | 0.9700 | C19—H19C | 0.9600 |
C8—H8B | 0.9700 | O1W—H1WA | 0.8500 |
C9—O2 | 1.419 (11) | O1W—H1WB | 0.8500 |
C9—H9A | 0.9700 | ||
O2—Mn1—O1 | 174.3 (3) | H9A—C9—H9B | 108.5 |
O2—Mn1—N1 | 83.9 (3) | O3—C10—C11 | 122.4 (8) |
O1—Mn1—N1 | 90.6 (3) | O3—C10—C15 | 122.2 (8) |
O2—Mn1—O3 | 92.7 (3) | C11—C10—C15 | 115.2 (8) |
O1—Mn1—O3 | 90.6 (3) | C12—C11—C10 | 125.5 (9) |
N1—Mn1—O3 | 110.2 (3) | C12—C11—Br3 | 115.6 (8) |
O2—Mn1—N2 | 89.9 (3) | C10—C11—Br3 | 118.7 (7) |
O1—Mn1—N2 | 95.0 (3) | C11—C12—C13 | 115.9 (8) |
N1—Mn1—N2 | 162.6 (3) | C11—C12—H12 | 122.0 |
O3—Mn1—N2 | 86.2 (3) | C13—C12—H12 | 122.0 |
O2—Mn1—O4 | 92.3 (3) | C14—C13—C12 | 120.4 (8) |
O1—Mn1—O4 | 85.9 (3) | C14—C13—Br4 | 122.0 (8) |
N1—Mn1—O4 | 87.3 (3) | C12—C13—Br4 | 117.6 (7) |
O3—Mn1—O4 | 162.2 (3) | C13—C14—C15 | 121.9 (9) |
N2—Mn1—O4 | 76.7 (3) | C13—C14—H14 | 119.0 |
O1—C1—C6 | 124.4 (9) | C15—C14—H14 | 119.0 |
O1—C1—C2 | 117.9 (8) | C14—C15—C10 | 120.8 (8) |
C6—C1—C2 | 117.6 (8) | C14—C15—C16 | 115.7 (8) |
C3—C2—C1 | 121.4 (10) | C10—C15—C16 | 123.5 (8) |
C3—C2—Br1 | 119.9 (9) | N2—C16—C15 | 126.9 (8) |
C1—C2—Br1 | 118.7 (8) | N2—C16—H16 | 116.5 |
C4—C3—C2 | 118.7 (12) | C15—C16—H16 | 116.5 |
C4—C3—H3 | 120.6 | C18—C17—N2 | 109.8 (7) |
C2—C3—H3 | 120.6 | C18—C17—H17A | 109.7 |
C5—C4—C3 | 123.2 (11) | N2—C17—H17A | 109.7 |
C5—C4—Br2 | 120.1 (9) | C18—C17—H17B | 109.7 |
C3—C4—Br2 | 116.6 (10) | N2—C17—H17B | 109.7 |
C4—C5—C6 | 119.4 (10) | H17A—C17—H17B | 108.2 |
C4—C5—H5 | 120.3 | O4—C18—C17 | 111.2 (7) |
C6—C5—H5 | 120.3 | O4—C18—H18A | 109.4 |
C5—C6—C1 | 119.2 (9) | C17—C18—H18A | 109.4 |
C5—C6—C7 | 118.3 (9) | O4—C18—H18B | 109.4 |
C1—C6—C7 | 122.5 (8) | C17—C18—H18B | 109.4 |
N1—C7—C6 | 124.0 (8) | H18A—C18—H18B | 108.0 |
N1—C7—H7 | 118.0 | C7—N1—C8 | 119.9 (8) |
C6—C7—H7 | 118.0 | C7—N1—Mn1 | 129.1 (7) |
N1—C8—C9 | 107.0 (8) | C8—N1—Mn1 | 110.8 (6) |
N1—C8—H8A | 110.3 | C16—N2—C17 | 118.0 (7) |
C9—C8—H8A | 110.3 | C16—N2—Mn1 | 125.6 (6) |
N1—C8—H8B | 110.3 | C17—N2—Mn1 | 115.3 (6) |
C9—C8—H8B | 110.3 | C1—O1—Mn1 | 129.1 (6) |
H8A—C8—H8B | 108.6 | C9—O2—Mn1 | 112.2 (6) |
O2—C9—C8 | 107.3 (7) | C10—O3—Mn1 | 131.9 (6) |
O2—C9—H9A | 110.3 | C18—O4—Mn1 | 105.9 (5) |
C8—C9—H9A | 110.3 | C19—O5—H5A | 115.3 |
O2—C9—H9B | 110.3 | H1WA—O1W—H1WB | 94.9 |
C8—C9—H9B | 110.3 |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5A···Br1i | 0.85 | 3.04 | 3.893 (18) | 179 |
O1W—H1WA···O5 | 0.85 | 1.52 | 2.19 (2) | 134 |
Symmetry code: (i) x−1/4, −y+3/4, z+1/4. |
Experimental details
Crystal data | |
Chemical formula | C18H14Br4MnN2O4·0.5CH4O·H2O |
Mr | 730.89 |
Crystal system, space group | Orthorhombic, Fdd2 |
Temperature (K) | 293 |
a, b, c (Å) | 26.286 (4), 32.908 (5), 11.1681 (17) |
V (Å3) | 9661 (2) |
Z | 16 |
Radiation type | Mo Kα |
µ (mm−1) | 7.20 |
Crystal size (mm) | 0.18 × 0.14 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan SADABS (Sheldrick, 1996) |
Tmin, Tmax | 0.357, 0.455 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8149, 4075, 3143 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.133, 1.05 |
No. of reflections | 4075 |
No. of parameters | 290 |
No. of restraints | 20 |
H-atom treatment | H-atom parameters constrained |
w = 1/[σ2(Fo2) + (0.0654P)2 + 43.5887P] where P = (Fo2 + 2Fc2)/3 | |
Δρmax, Δρmin (e Å−3) | 1.09, −0.39 |
Absolute structure | Flack (1983), 1669 Friedel pairs |
Absolute structure parameter | 0.045 (19) |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 1997).
Mn1—O2 | 1.871 (7) | Mn1—O3 | 2.027 (7) |
Mn1—O1 | 1.906 (7) | Mn1—N2 | 2.094 (7) |
Mn1—N1 | 1.984 (7) | Mn1—O4 | 2.324 (6) |
O2—Mn1—O1 | 174.3 (3) | N1—Mn1—N2 | 162.6 (3) |
O2—Mn1—N1 | 83.9 (3) | O3—Mn1—N2 | 86.2 (3) |
O1—Mn1—N1 | 90.6 (3) | O2—Mn1—O4 | 92.3 (3) |
O2—Mn1—O3 | 92.7 (3) | O1—Mn1—O4 | 85.9 (3) |
O1—Mn1—O3 | 90.6 (3) | N1—Mn1—O4 | 87.3 (3) |
N1—Mn1—O3 | 110.2 (3) | O3—Mn1—O4 | 162.2 (3) |
O2—Mn1—N2 | 89.9 (3) | N2—Mn1—O4 | 76.7 (3) |
O1—Mn1—N2 | 95.0 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5A···Br1i | 0.85 | 3.04 | 3.893 (18) | 179.3 |
O1W—H1WA···O5 | 0.85 | 1.52 | 2.19 (2) | 133.6 |
Symmetry code: (i) x−1/4, −y+3/4, z+1/4. |
Interest on packing arrangements of halogenated compounds goes back many years to what Schmidt called the 'chloro effect', where the presence of chloro substituents on aromatic compounds frequently results in stacking arrangements with a short (ca 4 Å) crystallographic axis (Cohen et al., 1964; Zordan et al., 2005; Desiraju, 1989). The title compound, (I), contains the dibrominated ligand L- with two Br atoms accessible at the periphery of each ligand.
In (I) the MnIV atom is coordinated by two N and four O atoms from two different tridentate ligands L2- forming a distorted octahedral geometry (Fig. 1 and Table 1). The shortest Br···Br contacts (Zordan et al., 2005; Zaman et al., 2004; Sarma & Desiraju, 1986) are Br3i···Br3ii = 3.555 (5) Å, Br3i···Br4iii = 3.742 (5) Å, and Br4i···Br2iv = 3.631 (5) Å, [symmetry codes: (i) 1/2 - x, -1/2 - y, z; (ii) x, -1 + y, z; (iii) 1/4 + x,-1/4 - y, -1/4 + z; (iv) 1/4 - x, -3/4 - y, 1/4 + z]. The molecules of (I) are connected into a 3-D network through short Br···Br interactions, very strong O–H···O hydrogen bond and O–H···Br hydrogen bond (Table 2 and Fig. 2).