metal-organic compounds
Chlorido{5,5′-dimethyl-2,2′-[1,2-phenylenebis(nitrilomethylidyne)]diphenolato-κ4O,N,N′,O′}manganese(III)
aSchool of Chemical Science, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand, and cX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
*Correspondence e-mail: hkfun@usm.my
In the title complex, [Mn(C22H18N2O2)Cl], the MnIII center is in a distorted square-pyramidal configuration; the basal plane is formed by the N2O2 donors of the tetradentate Schiff base dianion, with the two phenol O atoms and two imine N atoms each mutually cis. The chloride ion occupies the apical coordination site. The dihedral angle between the two outer phenolate rings of the tetradentate ligand is 18.24 (9)°. The central benzene ring makes dihedral angles of 13.71 (8) and 30.50 (8)° with the two outer phenolate rings. In the weak C—H⋯Cl interactions link the molecules into screw helices along the b direction. These helices are further connected by weak C—H⋯O interactions into a three-dimensional network. The is further stabilized by C—H⋯π interactions involving the central benzene ring.
Related literature
For values of bond lengths, see: Allen et al. (1987). For details of ring conformations, see: Cremer & Pople (1975). For related structures, see, for example: Eltayeb et al. (2008); Habibi et al. (2007); Mitra et al. (2006). For background to applications of manganese complexes, see, for example: Dixit & Srinivasan (1988); Glatzel et al. (2004); Lu et al. (2006); Stallings et al. (1985).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell APEX2; data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2003).
Supporting information
10.1107/S1600536808007459/sj2474sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808007459/sj2474Isup2.hkl
The title compound was synthesized by adding 2-hydroxy-4-methylbenzaldehyde (0.546 g, 4 mmol) to a solution of o-phenylenediamine (0.216 g, 2 mmol) in ethanol 95% (30 ml). The mixture was refluxed with stirring for half an hour. Manganese chloride tetrahydrate (0.394 g, 2 mmol) in ethanol (10 ml) was then added, followed by triethylamine (0.5 ml, 3.6 mmol). The mixture was refluxed at room temperature for three hours. A brown precipitate was obtained, washed with about 5 ml ethanol, dried, and then washed with copious quantities of diethylether. Brown single crystals of the title compound suitable for x-ray
were recrystallized from ethanol/methanol (2:1 v/v) by slow evaporation of the solvent at room temperature over two months.All H atoms were placed in calculated positions with d(C—H) = 0.93 Å, Uiso=1.2Ueq(C) for aromatic and CH, 0.96 Å, Uiso = 1.5Ueq(C) for CH3 atoms. A rotating group model was used for the methyl groups. The highest residual electron density peak is located at 0.81 Å from Cl1 and the deepest hole is located at 0.67 Å from Mn1.
Data collection: APEX2 (Bruker, 2005); cell
APEX2 (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2003).[Mn(C22H18N2O2)Cl] | F(000) = 1776 |
Mr = 432.77 | Dx = 1.555 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 8109 reflections |
a = 20.9593 (5) Å | θ = 2.1–35.0° |
b = 13.5897 (3) Å | µ = 0.88 mm−1 |
c = 14.9316 (3) Å | T = 100 K |
β = 119.641 (1)° | Block, brown |
V = 3696.43 (14) Å3 | 0.56 × 0.20 × 0.19 mm |
Z = 8 |
Bruker SMART APEXII CCD area-detector diffractometer | 8109 independent reflections |
Radiation source: fine-focus sealed tube | 5992 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.048 |
Detector resolution: 8.33 pixels mm-1 | θmax = 35.0°, θmin = 2.1° |
ω scans | h = −33→28 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −21→21 |
Tmin = 0.639, Tmax = 0.852 | l = −23→24 |
35769 measured reflections |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.045 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.126 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0635P)2 + 1.3131P] where P = (Fo2 + 2Fc2)/3 |
8109 reflections | (Δ/σ)max = 0.001 |
255 parameters | Δρmax = 0.75 e Å−3 |
0 restraints | Δρmin = −0.69 e Å−3 |
[Mn(C22H18N2O2)Cl] | V = 3696.43 (14) Å3 |
Mr = 432.77 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 20.9593 (5) Å | µ = 0.88 mm−1 |
b = 13.5897 (3) Å | T = 100 K |
c = 14.9316 (3) Å | 0.56 × 0.20 × 0.19 mm |
β = 119.641 (1)° |
Bruker SMART APEXII CCD area-detector diffractometer | 8109 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 5992 reflections with I > 2σ(I) |
Tmin = 0.639, Tmax = 0.852 | Rint = 0.048 |
35769 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | 0 restraints |
wR(F2) = 0.126 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.75 e Å−3 |
8109 reflections | Δρmin = −0.69 e Å−3 |
255 parameters |
Experimental. The low-temperature data was collected with the Oxford Cyrosystem Cobra low-temperature attachment. |
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 | ||
Mn1 | 0.225261 (11) | 0.228215 (15) | 0.091917 (16) | 0.01606 (6) | |
Cl1 | 0.16386 (2) | 0.29835 (3) | 0.17860 (3) | 0.02432 (9) | |
O1 | 0.14852 (6) | 0.14593 (7) | 0.00249 (8) | 0.0192 (2) | |
O2 | 0.19870 (6) | 0.32753 (7) | −0.00984 (8) | 0.0185 (2) | |
N1 | 0.27984 (6) | 0.11876 (9) | 0.18852 (9) | 0.0168 (2) | |
N2 | 0.31816 (6) | 0.30016 (9) | 0.18058 (9) | 0.0167 (2) | |
C1 | 0.13609 (8) | 0.05345 (10) | 0.01522 (11) | 0.0174 (3) | |
C2 | 0.07011 (8) | 0.00997 (11) | −0.05872 (12) | 0.0219 (3) | |
H2A | 0.0365 | 0.0481 | −0.1136 | 0.026* | |
C3 | 0.05302 (8) | −0.08722 (11) | −0.05333 (12) | 0.0209 (3) | |
C4 | 0.10445 (9) | −0.14629 (12) | 0.02727 (12) | 0.0226 (3) | |
H4A | 0.0941 | −0.2121 | 0.0314 | 0.027* | |
C5 | 0.17011 (8) | −0.10657 (11) | 0.10001 (11) | 0.0209 (3) | |
H5A | 0.2043 | −0.1468 | 0.1520 | 0.025* | |
C6 | 0.18698 (8) | −0.00631 (10) | 0.09789 (10) | 0.0168 (2) | |
C7 | 0.25658 (8) | 0.02818 (11) | 0.17669 (10) | 0.0173 (2) | |
H7A | 0.2881 | −0.0180 | 0.2237 | 0.021* | |
C8 | 0.35313 (7) | 0.14389 (11) | 0.26289 (10) | 0.0177 (3) | |
C9 | 0.40356 (8) | 0.08078 (12) | 0.33913 (12) | 0.0233 (3) | |
H9A | 0.3889 | 0.0190 | 0.3489 | 0.028* | |
C10 | 0.47580 (8) | 0.11154 (13) | 0.40001 (12) | 0.0263 (3) | |
H10A | 0.5094 | 0.0701 | 0.4512 | 0.032* | |
C11 | 0.49860 (8) | 0.20291 (13) | 0.38569 (12) | 0.0258 (3) | |
H11A | 0.5475 | 0.2215 | 0.4251 | 0.031* | |
C12 | 0.44804 (8) | 0.26669 (12) | 0.31221 (12) | 0.0229 (3) | |
H12A | 0.4631 | 0.3282 | 0.3024 | 0.027* | |
C13 | 0.37498 (8) | 0.23870 (11) | 0.25325 (11) | 0.0174 (3) | |
C14 | 0.32367 (8) | 0.39542 (11) | 0.17937 (11) | 0.0193 (3) | |
H14A | 0.3669 | 0.4242 | 0.2297 | 0.023* | |
C15 | 0.26777 (8) | 0.45912 (10) | 0.10593 (11) | 0.0179 (3) | |
C16 | 0.27519 (9) | 0.56198 (11) | 0.12163 (12) | 0.0216 (3) | |
H16A | 0.3150 | 0.5867 | 0.1811 | 0.026* | |
C17 | 0.22469 (9) | 0.62645 (11) | 0.05081 (12) | 0.0235 (3) | |
H17A | 0.2306 | 0.6938 | 0.0630 | 0.028* | |
C18 | 0.16426 (9) | 0.59053 (11) | −0.03985 (12) | 0.0216 (3) | |
C19 | 0.15624 (8) | 0.48953 (11) | −0.05583 (11) | 0.0196 (3) | |
H19A | 0.1159 | 0.4657 | −0.1152 | 0.024* | |
C20 | 0.20661 (8) | 0.42298 (10) | 0.01426 (11) | 0.0176 (3) | |
C21 | −0.01947 (9) | −0.12957 (13) | −0.13236 (15) | 0.0305 (4) | |
H21A | −0.0443 | −0.0835 | −0.1878 | 0.046* | |
H21B | −0.0491 | −0.1423 | −0.1011 | 0.046* | |
H21C | −0.0114 | −0.1899 | −0.1587 | 0.046* | |
C22 | 0.10955 (10) | 0.65886 (13) | −0.12034 (14) | 0.0305 (4) | |
H22A | 0.1032 | 0.6414 | −0.1866 | 0.046* | |
H22B | 0.1271 | 0.7253 | −0.1040 | 0.046* | |
H22C | 0.0634 | 0.6535 | −0.1218 | 0.046* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Mn1 | 0.01366 (10) | 0.01200 (11) | 0.01705 (10) | −0.00147 (7) | 0.00341 (7) | 0.00028 (7) |
Cl1 | 0.02102 (17) | 0.02319 (18) | 0.02899 (18) | −0.00435 (13) | 0.01255 (14) | −0.00675 (13) |
O1 | 0.0161 (5) | 0.0125 (4) | 0.0212 (5) | −0.0013 (4) | 0.0033 (4) | 0.0006 (3) |
O2 | 0.0210 (5) | 0.0112 (4) | 0.0180 (4) | −0.0003 (4) | 0.0057 (4) | −0.0002 (3) |
N1 | 0.0142 (5) | 0.0162 (5) | 0.0164 (5) | −0.0010 (4) | 0.0049 (4) | 0.0001 (4) |
N2 | 0.0142 (5) | 0.0148 (5) | 0.0183 (5) | −0.0012 (4) | 0.0058 (4) | −0.0014 (4) |
C1 | 0.0150 (6) | 0.0136 (6) | 0.0218 (6) | −0.0009 (5) | 0.0077 (5) | −0.0011 (5) |
C2 | 0.0139 (6) | 0.0168 (7) | 0.0271 (7) | −0.0012 (5) | 0.0041 (5) | −0.0017 (5) |
C3 | 0.0149 (6) | 0.0174 (7) | 0.0280 (7) | −0.0028 (5) | 0.0087 (5) | −0.0033 (5) |
C4 | 0.0251 (7) | 0.0174 (7) | 0.0250 (7) | −0.0053 (6) | 0.0121 (6) | −0.0018 (5) |
C5 | 0.0231 (7) | 0.0147 (6) | 0.0214 (6) | −0.0012 (5) | 0.0084 (5) | 0.0013 (5) |
C6 | 0.0153 (6) | 0.0146 (6) | 0.0188 (6) | −0.0016 (5) | 0.0070 (5) | 0.0000 (4) |
C7 | 0.0175 (6) | 0.0154 (6) | 0.0170 (5) | 0.0002 (5) | 0.0070 (5) | 0.0012 (4) |
C8 | 0.0133 (6) | 0.0181 (6) | 0.0180 (6) | 0.0000 (5) | 0.0049 (5) | −0.0002 (5) |
C9 | 0.0166 (6) | 0.0227 (7) | 0.0230 (6) | 0.0002 (5) | 0.0041 (5) | 0.0039 (5) |
C10 | 0.0166 (7) | 0.0282 (8) | 0.0242 (7) | 0.0023 (6) | 0.0025 (5) | 0.0038 (6) |
C11 | 0.0142 (6) | 0.0295 (8) | 0.0264 (7) | −0.0010 (6) | 0.0044 (5) | −0.0017 (6) |
C12 | 0.0149 (6) | 0.0217 (7) | 0.0272 (7) | −0.0028 (5) | 0.0067 (5) | −0.0032 (5) |
C13 | 0.0144 (6) | 0.0171 (6) | 0.0178 (6) | −0.0011 (5) | 0.0057 (5) | −0.0022 (5) |
C14 | 0.0181 (6) | 0.0172 (6) | 0.0205 (6) | −0.0037 (5) | 0.0080 (5) | −0.0031 (5) |
C15 | 0.0171 (6) | 0.0129 (6) | 0.0223 (6) | −0.0023 (5) | 0.0087 (5) | −0.0011 (5) |
C16 | 0.0233 (7) | 0.0155 (6) | 0.0253 (7) | −0.0033 (5) | 0.0115 (6) | −0.0026 (5) |
C17 | 0.0280 (8) | 0.0132 (6) | 0.0308 (7) | −0.0001 (5) | 0.0158 (6) | −0.0011 (5) |
C18 | 0.0250 (7) | 0.0171 (7) | 0.0247 (7) | 0.0029 (5) | 0.0139 (6) | 0.0022 (5) |
C19 | 0.0210 (7) | 0.0163 (6) | 0.0212 (6) | 0.0012 (5) | 0.0102 (5) | 0.0003 (5) |
C20 | 0.0191 (6) | 0.0138 (6) | 0.0201 (6) | −0.0016 (5) | 0.0097 (5) | −0.0006 (5) |
C21 | 0.0176 (7) | 0.0219 (8) | 0.0417 (9) | −0.0054 (6) | 0.0068 (6) | −0.0063 (7) |
C22 | 0.0371 (9) | 0.0193 (7) | 0.0317 (8) | 0.0082 (7) | 0.0143 (7) | 0.0026 (6) |
Mn1—O1 | 1.8698 (10) | C9—H9A | 0.9300 |
Mn1—O2 | 1.8983 (10) | C10—C11 | 1.385 (2) |
Mn1—N2 | 1.9875 (12) | C10—H10A | 0.9300 |
Mn1—N1 | 1.9923 (12) | C11—C12 | 1.388 (2) |
Mn1—Cl1 | 2.4263 (4) | C11—H11A | 0.9300 |
O1—C1 | 1.3162 (17) | C12—C13 | 1.390 (2) |
O2—C20 | 1.3344 (17) | C12—H12A | 0.9300 |
N1—C7 | 1.3034 (18) | C14—C15 | 1.433 (2) |
N1—C8 | 1.4221 (17) | C14—H14A | 0.9300 |
N2—C14 | 1.3006 (19) | C15—C16 | 1.413 (2) |
N2—C13 | 1.4195 (18) | C15—C20 | 1.4221 (19) |
C1—C2 | 1.4036 (19) | C16—C17 | 1.378 (2) |
C1—C6 | 1.4208 (19) | C16—H16A | 0.9300 |
C2—C3 | 1.381 (2) | C17—C18 | 1.407 (2) |
C2—H2A | 0.9300 | C17—H17A | 0.9300 |
C3—C4 | 1.404 (2) | C18—C19 | 1.389 (2) |
C3—C21 | 1.503 (2) | C18—C22 | 1.503 (2) |
C4—C5 | 1.373 (2) | C19—C20 | 1.391 (2) |
C4—H4A | 0.9300 | C19—H19A | 0.9300 |
C5—C6 | 1.412 (2) | C21—H21A | 0.9600 |
C5—H5A | 0.9300 | C21—H21B | 0.9600 |
C6—C7 | 1.4263 (19) | C21—H21C | 0.9600 |
C7—H7A | 0.9300 | C22—H22A | 0.9600 |
C8—C13 | 1.398 (2) | C22—H22B | 0.9600 |
C8—C9 | 1.399 (2) | C22—H22C | 0.9600 |
C9—C10 | 1.390 (2) | ||
O1—Mn1—O2 | 92.61 (4) | C11—C10—C9 | 121.08 (14) |
O1—Mn1—N2 | 169.49 (5) | C11—C10—H10A | 119.5 |
O2—Mn1—N2 | 89.21 (5) | C9—C10—H10A | 119.5 |
O1—Mn1—N1 | 93.07 (5) | C10—C11—C12 | 119.67 (14) |
O2—Mn1—N1 | 161.15 (5) | C10—C11—H11A | 120.2 |
N2—Mn1—N1 | 82.10 (5) | C12—C11—H11A | 120.2 |
O1—Mn1—Cl1 | 96.89 (4) | C11—C12—C13 | 120.06 (15) |
O2—Mn1—Cl1 | 97.16 (4) | C11—C12—H12A | 120.0 |
N2—Mn1—Cl1 | 93.14 (4) | C13—C12—H12A | 120.0 |
N1—Mn1—Cl1 | 99.97 (4) | C12—C13—C8 | 120.09 (13) |
C1—O1—Mn1 | 129.03 (9) | C12—C13—N2 | 124.62 (14) |
C20—O2—Mn1 | 121.82 (9) | C8—C13—N2 | 115.29 (12) |
C7—N1—C8 | 121.32 (12) | N2—C14—C15 | 124.56 (13) |
C7—N1—Mn1 | 124.38 (10) | N2—C14—H14A | 117.7 |
C8—N1—Mn1 | 113.44 (9) | C15—C14—H14A | 117.7 |
C14—N2—C13 | 123.34 (12) | C16—C15—C20 | 118.30 (13) |
C14—N2—Mn1 | 123.02 (10) | C16—C15—C14 | 119.30 (13) |
C13—N2—Mn1 | 113.25 (9) | C20—C15—C14 | 122.31 (13) |
O1—C1—C2 | 118.48 (13) | C17—C16—C15 | 121.46 (14) |
O1—C1—C6 | 123.65 (12) | C17—C16—H16A | 119.3 |
C2—C1—C6 | 117.84 (13) | C15—C16—H16A | 119.3 |
C3—C2—C1 | 122.67 (14) | C16—C17—C18 | 120.13 (14) |
C3—C2—H2A | 118.7 | C16—C17—H17A | 119.9 |
C1—C2—H2A | 118.7 | C18—C17—H17A | 119.9 |
C2—C3—C4 | 119.04 (13) | C19—C18—C17 | 118.89 (14) |
C2—C3—C21 | 120.74 (14) | C19—C18—C22 | 119.57 (14) |
C4—C3—C21 | 120.23 (14) | C17—C18—C22 | 121.52 (14) |
C5—C4—C3 | 119.82 (14) | C18—C19—C20 | 122.06 (14) |
C5—C4—H4A | 120.1 | C18—C19—H19A | 119.0 |
C3—C4—H4A | 120.1 | C20—C19—H19A | 119.0 |
C4—C5—C6 | 121.72 (14) | O2—C20—C19 | 118.83 (13) |
C4—C5—H5A | 119.1 | O2—C20—C15 | 121.86 (13) |
C6—C5—H5A | 119.1 | C19—C20—C15 | 119.15 (13) |
C5—C6—C1 | 118.84 (12) | C3—C21—H21A | 109.5 |
C5—C6—C7 | 117.65 (13) | C3—C21—H21B | 109.5 |
C1—C6—C7 | 123.43 (13) | H21A—C21—H21B | 109.5 |
N1—C7—C6 | 125.70 (13) | C3—C21—H21C | 109.5 |
N1—C7—H7A | 117.2 | H21A—C21—H21C | 109.5 |
C6—C7—H7A | 117.2 | H21B—C21—H21C | 109.5 |
C13—C8—C9 | 119.63 (13) | C18—C22—H22A | 109.5 |
C13—C8—N1 | 115.03 (12) | C18—C22—H22B | 109.5 |
C9—C8—N1 | 125.29 (13) | H22A—C22—H22B | 109.5 |
C10—C9—C8 | 119.20 (15) | C18—C22—H22C | 109.5 |
C10—C9—H9A | 120.4 | H22A—C22—H22C | 109.5 |
C8—C9—H9A | 120.4 | H22B—C22—H22C | 109.5 |
O2—Mn1—O1—C1 | 170.43 (13) | C5—C6—C7—N1 | −177.31 (15) |
N2—Mn1—O1—C1 | 70.7 (3) | C1—C6—C7—N1 | 6.2 (2) |
N1—Mn1—O1—C1 | 8.41 (13) | C7—N1—C8—C13 | 167.53 (14) |
Cl1—Mn1—O1—C1 | −92.03 (12) | Mn1—N1—C8—C13 | −2.25 (16) |
O1—Mn1—O2—C20 | 145.34 (11) | C7—N1—C8—C9 | −9.7 (2) |
N2—Mn1—O2—C20 | −45.01 (11) | Mn1—N1—C8—C9 | −179.47 (13) |
N1—Mn1—O2—C20 | −107.23 (17) | C13—C8—C9—C10 | −3.8 (2) |
Cl1—Mn1—O2—C20 | 48.06 (11) | N1—C8—C9—C10 | 173.30 (15) |
O1—Mn1—N1—C7 | −1.63 (13) | C8—C9—C10—C11 | −0.6 (3) |
O2—Mn1—N1—C7 | −108.98 (16) | C9—C10—C11—C12 | 2.6 (3) |
N2—Mn1—N1—C7 | −172.25 (13) | C10—C11—C12—C13 | −0.1 (3) |
Cl1—Mn1—N1—C7 | 95.93 (12) | C11—C12—C13—C8 | −4.3 (2) |
O1—Mn1—N1—C8 | 167.79 (10) | C11—C12—C13—N2 | 176.11 (15) |
O2—Mn1—N1—C8 | 60.44 (19) | C9—C8—C13—C12 | 6.3 (2) |
N2—Mn1—N1—C8 | −2.83 (10) | N1—C8—C13—C12 | −171.13 (14) |
Cl1—Mn1—N1—C8 | −94.65 (10) | C9—C8—C13—N2 | −174.11 (13) |
O1—Mn1—N2—C14 | 131.1 (2) | N1—C8—C13—N2 | 8.51 (19) |
O2—Mn1—N2—C14 | 31.04 (12) | C14—N2—C13—C12 | −18.1 (2) |
N1—Mn1—N2—C14 | −165.73 (13) | Mn1—N2—C13—C12 | 168.88 (13) |
Cl1—Mn1—N2—C14 | −66.09 (12) | C14—N2—C13—C8 | 162.28 (14) |
O1—Mn1—N2—C13 | −55.8 (3) | Mn1—N2—C13—C8 | −10.73 (16) |
O2—Mn1—N2—C13 | −155.92 (10) | C13—N2—C14—C15 | 178.88 (14) |
N1—Mn1—N2—C13 | 7.31 (10) | Mn1—N2—C14—C15 | −8.8 (2) |
Cl1—Mn1—N2—C13 | 106.95 (10) | N2—C14—C15—C16 | 170.29 (15) |
Mn1—O1—C1—C2 | 173.26 (11) | N2—C14—C15—C20 | −13.2 (2) |
Mn1—O1—C1—C6 | −9.1 (2) | C20—C15—C16—C17 | 0.3 (2) |
O1—C1—C2—C3 | 178.35 (15) | C14—C15—C16—C17 | 176.93 (15) |
C6—C1—C2—C3 | 0.6 (2) | C15—C16—C17—C18 | −0.3 (2) |
C1—C2—C3—C4 | −2.1 (2) | C16—C17—C18—C19 | 0.6 (2) |
C1—C2—C3—C21 | 177.86 (16) | C16—C17—C18—C22 | −177.92 (16) |
C2—C3—C4—C5 | 1.0 (2) | C17—C18—C19—C20 | −0.9 (2) |
C21—C3—C4—C5 | −179.03 (16) | C22—C18—C19—C20 | 177.67 (15) |
C3—C4—C5—C6 | 1.7 (2) | Mn1—O2—C20—C19 | −146.85 (11) |
C4—C5—C6—C1 | −3.3 (2) | Mn1—O2—C20—C15 | 37.70 (18) |
C4—C5—C6—C7 | −179.96 (15) | C18—C19—C20—O2 | −174.69 (14) |
O1—C1—C6—C5 | −175.56 (14) | C18—C19—C20—C15 | 0.9 (2) |
C2—C1—C6—C5 | 2.1 (2) | C16—C15—C20—O2 | 174.89 (14) |
O1—C1—C6—C7 | 0.9 (2) | C14—C15—C20—O2 | −1.6 (2) |
C2—C1—C6—C7 | 178.55 (14) | C16—C15—C20—C19 | −0.6 (2) |
C8—N1—C7—C6 | −173.22 (14) | C14—C15—C20—C19 | −177.07 (14) |
Mn1—N1—C7—C6 | −4.6 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···Cl1i | 0.93 | 2.77 | 3.6508 (16) | 158 |
C7—H7A···Cl1i | 0.93 | 2.81 | 3.6933 (15) | 158 |
C11—H11A···O1ii | 0.93 | 2.58 | 3.423 (2) | 151 |
C4—H4A···Cg1iii | 0.93 | 2.83 | 3.5443 (19) | 135 |
Symmetry codes: (i) −x+1/2, y−1/2, −z+1/2; (ii) x+1/2, −y+1/2, z+1/2; (iii) x, −y−1, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Mn(C22H18N2O2)Cl] |
Mr | 432.77 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 100 |
a, b, c (Å) | 20.9593 (5), 13.5897 (3), 14.9316 (3) |
β (°) | 119.641 (1) |
V (Å3) | 3696.43 (14) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.88 |
Crystal size (mm) | 0.56 × 0.20 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.639, 0.852 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 35769, 8109, 5992 |
Rint | 0.048 |
(sin θ/λ)max (Å−1) | 0.807 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.126, 1.07 |
No. of reflections | 8109 |
No. of parameters | 255 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.75, −0.69 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···Cl1i | 0.93 | 2.7705 | 3.6508 (16) | 158 |
C7—H7A···Cl1i | 0.93 | 2.8139 | 3.6933 (15) | 158 |
C11—H11A···O1ii | 0.93 | 2.5776 | 3.423 (2) | 151 |
C4—H4A···Cg1iii | 0.93 | 2.8292 | 3.5443 (19) | 135 |
Symmetry codes: (i) −x+1/2, y−1/2, −z+1/2; (ii) x+1/2, −y+1/2, z+1/2; (iii) x, −y−1, z−1/2. |
Acknowledgements
The authors thank the Malaysian Government, Ministry of Science, Technology and Innovation (MOSTI), and Universiti Sains Malaysia for the E-Science Fund research grant (PKIMIA/613308) and facilities. The International University of Africa (Sudan) is acknowledged for providing study leave to NEE. The authors also thank Universiti Sains Malaysia for the Fundamental Research Grant Scheme (FRGS) grant No. 203/PFIZIK/671064.
References
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We have been interested in syntheses of Schiff base ligands containing oxygen and imine nitrogen atoms and their metal complexes due to their variety of applications. Manganese complexes with Schiff base ligands have numerous applications in chemistry, biology, physics and advanced materials and are used in catalysis (Dixit and Srinivasan, 1988), as models for the oxygen-evolving complex of photosystem II (Glatzel et al., 2004), and as single-molecule magnets (Lu et al., 2006). They also serve as models for the active sites of manganese-containing metal enzymes (Stallings et al., 1985). Recently, we reported the crystal structure of a five coordinate MnIII complex with a similar N2O2 donor Schiff base ligand, chlorido{6,6'-dimethyl-2,2'-[1,2-phenylenebis(nitrilomethylidene)]diphenolato- κ4O,N,N',O'}manganese(III) monohydrate (Eltayeb et al., 2008). We report here the structure of (I), Fig. 1, a MnIII complex of a closely-related ligand.
In (I) the MnIII center is in a slightly distorted square-pyramidal geometry coordinating through N1, N2, O1 and O2 atoms of the tetradentate Schiff base ligand in the basal plane with the two phenolic O atoms and two imine N atoms in mutually cis positions. The apical position is coordinated by the Cl- ion. The Mn—O distances [Mn1—O1 = 1.8698 (12)Å, Mn1—O2 = 1.8983 (10)Å] and Mn—N distances [Mn1—N1 = 1.9923 (12)Å, Mn1—N2 = 1.9875 (12)Å] are in the same ranges of those observed in other related MnIII complexes of N2O2 Schiff base ligands (Eltayeb et al., 2008; Habibi et al., 2007; Mitra et al., 2006). Other bond lengths and angles observed in the structure are also normal (Allen et al., 1987). The basal bond angles O1–Mn1–O2 of 92.61 (4)°, O–Mn–N [O1–Mn1–N1 = 93.07 (5)°, O2–Mn1–N2 = 89.21 (5)°] are close to 90° whereas the N–Mn–N is smaller than 90° [N1–Mn1–N2 = 82.10 (5)°]. The bond angles between the Cl- ion and the atoms in the basal plane are in the range 93.14 (4) to 99.97 (4)°, indicating a distorted square-pyramidal geometry. Coordination of the the N2O2 chelate ligand to the MnIII ion results in the formation of an essentialy planar five-membered ring (Mn1/N1/N2/C8/C13) and two six-membered rings; the Mn1/O1/N1/C1/C6/C7 ring is almost planar with the greatest deviation being 0.059 (1)Å for atom O2 whereas the Mn1/O2/N2/C14/C15/C20 ring adopts an envelope conformation with atom O2 displaced from the Mn1/N2/C14/C15/C20 plane by 0.298 (1)Å and with Cremer & Pople (1975) puckering parameters Q = 0.483 (1)°, θ = 61.0 (1)° and ϕ = 18.8 (2)°. These parameters are larger in values than those observed in the closely-related structure (Eltayeb et al., 2008). The dihedral angle between the two outer phenolate rings [C1–C6 and C15–C20] of the Schiff base ligand is 18.24 (9)°. The central benzene ring (C8–C13) makes dihedral angles of 13.71 (8)° and 30.50 (8)° with the two outer phenolate rings. These dihedral angles are all wider than the corresponding angles found in a closely related structure (Eltayeb et al., 2008) due to the different locations of the two methyl substituents on the phenolate rings of the Schiff base ligand.
In the crystal packing (Fig. 2), weak C—H···Cl interactions (Table 1) link the molecules into screw helices along the b direction. These helices are further connected by weak C—H···O interactions into a three-dimensional network. The crystal is further stabilized by weak C—H···π interactions (Table 1); Cg1 is the centroid of the C8–C13 benzene ring.