Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807045370/xu2325sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807045370/xu2325Isup2.hkl |
CCDC reference: 663633
Key indicators
- Single-crystal X-ray study
- T = 298 K
- Mean (C-C) = 0.011 Å
- R factor = 0.050
- wR factor = 0.152
- Data-to-parameter ratio = 13.8
checkCIF/PLATON results
No syntax errors found
Alert level C PLAT230_ALERT_2_C Hirshfeld Test Diff for C16 - C17 .. 6.30 su PLAT232_ALERT_2_C Hirshfeld Test Diff (M-X) Mn1 - O1 .. 6.76 su PLAT232_ALERT_2_C Hirshfeld Test Diff (M-X) Mn1 - N2 .. 5.90 su PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for Mn1 PLAT341_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 11
Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 25.01 From the CIF: _reflns_number_total 3122 Count of symmetry unique reflns 1816 Completeness (_total/calc) 171.92% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 1306 Fraction of Friedel pairs measured 0.719 Are heavy atom types Z>Si present yes PLAT794_ALERT_5_G Check Predicted Bond Valency for Mn1 (4) 3.61
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 5 ALERT level C = Check and explain 2 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 4 ALERT type 2 Indicator that the structure model may be wrong or deficient 1 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check
Complexes with a similar ligand were reported by Yan et al. (2006); in those complexes the ligand was synthesized from the reaction of ethylenediamine, acetylacetone and salicylaldehyde.
1. Synthesis of the ligand H2hemn
To a 250 ml 3-neck round-bottom flask containing a solution of ethylenediamine (0.1 mol, 6.01 g) in ethanol (60 ml) at 50 °C, was added dropwise a solution of acetylacetone (0.1 mol, 10.01 g) in ethanol (60 ml). After the mixture was stirred at 50 °C for 4 h. A suspension of 2-hydroxy-1-naphthaldehyde (0.1 mol, 17.22 g) in ethanol (50 ml) was added into the flask. The resulted mixture was continued being stirred for another 4 h and then cooled down and the crude product was precipitated. The crude product was collected by filtration, washed with ethanol and vacuum dried overnight. The brown product H2hemn was used without further purification.
2. Synthesis of the complex
To a solution of MnCl2·4H2O (1 mmol, 197 mg) in methanol (40 ml) was added ligand H2hemn (1 mmol, 298 mg). After the resulted brown mixture was stirred at room temperature for 48 h, a brown turbid solution was obtained. The solution was filtered and slow evaporation of the solvent from the filtrate afforded dark brown crystals after 30 d.
Methyl H atoms and hydroxyl H atom were placed in calculated positions with C—H = 0.96 Å and O—H = 0.82 Å, and torsion angles were refined, Uiso(H) = 1.5Ueq(C,O). Other H atoms were placed in calculated positions with C—H = 0.93 (aromatic) or 0.97 Å (methylene) and refined in riding mode, with Uiso(H) = 1.2Ueq(C).
Complexes synthesized from manganese and Schiff base ligand have been of great interest for many years. They are very important in the development of coordination chemistry. As an extension of the research on the structural characterization of Mn compounds, we report here the crystal structure of a new mononuclear manganese(II) complex.
The title compound is an electronically neutral mononuclear manganese(II) complex. The MnII ion in the compound is four coordinated by two N atoms and two O atoms from the asymmetrical tetradentate Schiff base ligand H2hemn (H2hemn= 1-((E)-(2-((E)-((Z)-4-hydroxypent-3-en-2-ylidene)amino)ethylimino)methyl)naphthalen-2-ol) in an approximately square-planar geometry. The Mn—N2 bond distance (1.812 (6) Å) is shorter than Mn—N1(1.836 (5) Å) and the other two Mn—O bonds distance (Mn—O1=1.835 (5) Å, Mn—O2=1.829 (4) Å). There is O—H···O hydrogen bond interaction between the complex and the methanol solvent molecule (Table 1).
Complexes with a similar ligand were reported by Yan et al. (2006); in those complexes the ligand was synthesized from the reaction of ethylenediamine, acetylacetone and salicylaldehyde.
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL (Sheldrick, 1997b).
[Mn(C18H18N2O2)]·CH4O | F(000) = 796 |
Mr = 381.33 | Dx = 1.431 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | θ = 1.9–25.0° |
a = 7.3800 (16) Å | µ = 0.77 mm−1 |
b = 10.8935 (14) Å | T = 298 K |
c = 22.01 (2) Å | Block, dark brown |
V = 1769.6 (18) Å3 | 0.48 × 0.32 × 0.29 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 3122 independent reflections |
Radiation source: fine-focus sealed tube | 1863 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.081 |
φ and ω scans | θmax = 25.0°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −8→8 |
Tmin = 0.709, Tmax = 0.808 | k = −12→12 |
9257 measured reflections | l = −12→26 |
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)] = 0.050 | H-atom parameters constrained |
wR(F2) = 0.152 | w = 1/[σ2(Fo2) + (0.0806P)2] where P = (Fo2 + 2Fc2)/3 |
S = 0.91 | (Δ/σ)max = 0.001 |
3122 reflections | Δρmax = 0.29 e Å−3 |
227 parameters | Δρmin = −0.29 e Å−3 |
0 restraints | Absolute structure: Flack (1983), 1306 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.14 (4) |
[Mn(C18H18N2O2)]·CH4O | V = 1769.6 (18) Å3 |
Mr = 381.33 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 7.3800 (16) Å | µ = 0.77 mm−1 |
b = 10.8935 (14) Å | T = 298 K |
c = 22.01 (2) Å | 0.48 × 0.32 × 0.29 mm |
Bruker SMART CCD area-detector diffractometer | 3122 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1863 reflections with I > 2σ(I) |
Tmin = 0.709, Tmax = 0.808 | Rint = 0.081 |
9257 measured reflections |
R[F2 > 2σ(F2)] = 0.050 | H-atom parameters constrained |
wR(F2) = 0.152 | Δρmax = 0.29 e Å−3 |
S = 0.91 | Δρmin = −0.29 e Å−3 |
3122 reflections | Absolute structure: Flack (1983), 1306 Friedel pairs |
227 parameters | Absolute structure parameter: −0.14 (4) |
0 restraints |
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 > 2σ(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 | 0.56596 (12) | 0.66361 (7) | 0.47664 (4) | 0.0444 (3) | |
N1 | 0.5557 (7) | 0.8306 (5) | 0.4659 (3) | 0.0621 (13) | |
N2 | 0.5466 (8) | 0.6932 (5) | 0.5574 (3) | 0.0653 (15) | |
O1 | 0.6034 (6) | 0.6254 (4) | 0.3964 (2) | 0.0703 (14) | |
C1 | 0.6364 (10) | 0.6470 (7) | 0.2897 (3) | 0.091 (2) | |
H1A | 0.7642 | 0.6325 | 0.2856 | 0.136* | |
H1B | 0.5972 | 0.7025 | 0.2584 | 0.136* | |
H1C | 0.5723 | 0.5707 | 0.2858 | 0.136* | |
O2 | 0.5492 (7) | 0.4972 (4) | 0.48610 (18) | 0.0685 (12) | |
O3 | 0.3061 (10) | 0.4431 (6) | 0.3797 (3) | 0.140 (3) | |
H4 | 0.3692 | 0.4501 | 0.4102 | 0.210* | |
C2 | 0.5976 (10) | 0.7030 (7) | 0.3516 (3) | 0.070 (2) | |
C3 | 0.5641 (10) | 0.8231 (6) | 0.3573 (3) | 0.0754 (19) | |
H2 | 0.5551 | 0.8686 | 0.3216 | 0.090* | |
C4 | 0.5406 (9) | 0.8882 (6) | 0.4136 (4) | 0.070 (2) | |
C5 | 0.4973 (10) | 1.0246 (6) | 0.4112 (4) | 0.104 (3) | |
H4A | 0.5880 | 1.0694 | 0.4332 | 0.155* | |
H4B | 0.3808 | 1.0389 | 0.4292 | 0.155* | |
H4C | 0.4958 | 1.0514 | 0.3697 | 0.155* | |
C6 | 0.5291 (10) | 0.9018 (6) | 0.5220 (4) | 0.077 (2) | |
H5A | 0.4023 | 0.9231 | 0.5269 | 0.093* | |
H5B | 0.5997 | 0.9768 | 0.5207 | 0.093* | |
C7 | 0.5913 (10) | 0.8210 (6) | 0.5734 (3) | 0.076 (2) | |
H6A | 0.7209 | 0.8297 | 0.5794 | 0.091* | |
H6B | 0.5305 | 0.8441 | 0.6108 | 0.091* | |
C8 | 0.5105 (8) | 0.6148 (6) | 0.6014 (3) | 0.0626 (19) | |
H7 | 0.5063 | 0.6450 | 0.6409 | 0.075* | |
C9 | 0.4781 (8) | 0.4893 (6) | 0.5928 (3) | 0.0618 (18) | |
C10 | 0.4983 (9) | 0.4373 (6) | 0.5344 (3) | 0.067 (2) | |
C11 | 0.4626 (12) | 0.3081 (6) | 0.5271 (3) | 0.090 (2) | |
H10 | 0.4787 | 0.2719 | 0.4893 | 0.108* | |
C12 | 0.4054 (13) | 0.2374 (6) | 0.5749 (4) | 0.092 (3) | |
H11 | 0.3757 | 0.1555 | 0.5683 | 0.111* | |
C13 | 0.3906 (11) | 0.2869 (7) | 0.6343 (4) | 0.078 (2) | |
C14 | 0.4268 (10) | 0.4126 (7) | 0.6430 (3) | 0.0694 (18) | |
C15 | 0.4008 (10) | 0.4593 (8) | 0.7031 (3) | 0.087 (2) | |
H14 | 0.4212 | 0.5417 | 0.7119 | 0.105* | |
C16 | 0.3433 (11) | 0.3769 (11) | 0.7489 (4) | 0.110 (3) | |
H15 | 0.3262 | 0.4074 | 0.7879 | 0.132* | |
C17 | 0.3113 (14) | 0.2542 (10) | 0.7389 (5) | 0.110 (3) | |
H16 | 0.2712 | 0.2031 | 0.7700 | 0.132* | |
C18 | 0.3400 (11) | 0.2108 (8) | 0.6825 (5) | 0.097 (3) | |
H17 | 0.3256 | 0.1273 | 0.6753 | 0.116* | |
C19 | 0.3463 (13) | 0.3403 (9) | 0.3519 (5) | 0.148 (4) | |
H18A | 0.3735 | 0.3571 | 0.3100 | 0.222* | |
H18B | 0.2451 | 0.2852 | 0.3542 | 0.222* | |
H18C | 0.4498 | 0.3034 | 0.3710 | 0.222* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Mn1 | 0.0396 (4) | 0.0422 (4) | 0.0515 (5) | −0.0011 (4) | 0.0017 (5) | −0.0022 (5) |
N1 | 0.047 (3) | 0.056 (3) | 0.083 (4) | −0.006 (3) | 0.003 (4) | −0.002 (3) |
N2 | 0.053 (3) | 0.068 (4) | 0.075 (4) | −0.004 (3) | 0.000 (3) | −0.008 (3) |
O1 | 0.081 (4) | 0.059 (3) | 0.071 (3) | −0.004 (2) | 0.004 (3) | 0.006 (2) |
C1 | 0.094 (6) | 0.097 (6) | 0.081 (5) | 0.010 (5) | 0.016 (4) | 0.011 (5) |
O2 | 0.088 (3) | 0.054 (2) | 0.064 (3) | 0.005 (3) | 0.011 (3) | −0.002 (2) |
O3 | 0.144 (6) | 0.110 (5) | 0.166 (6) | 0.018 (4) | −0.034 (5) | −0.036 (5) |
C2 | 0.062 (5) | 0.074 (5) | 0.075 (5) | −0.009 (4) | 0.009 (4) | 0.004 (4) |
C3 | 0.073 (5) | 0.057 (4) | 0.097 (5) | −0.003 (5) | 0.000 (5) | 0.012 (4) |
C4 | 0.041 (4) | 0.058 (4) | 0.111 (6) | −0.008 (3) | 0.003 (5) | 0.014 (4) |
C5 | 0.075 (6) | 0.064 (5) | 0.172 (9) | 0.000 (4) | 0.011 (6) | 0.028 (6) |
C6 | 0.062 (5) | 0.056 (4) | 0.113 (6) | −0.008 (3) | 0.015 (5) | −0.017 (5) |
C7 | 0.066 (5) | 0.075 (5) | 0.086 (5) | −0.015 (5) | 0.006 (4) | −0.024 (4) |
C8 | 0.051 (4) | 0.077 (5) | 0.060 (4) | 0.000 (3) | −0.002 (3) | 0.002 (4) |
C9 | 0.056 (5) | 0.063 (4) | 0.067 (4) | 0.006 (3) | 0.004 (3) | 0.004 (4) |
C10 | 0.077 (5) | 0.047 (4) | 0.077 (5) | 0.008 (3) | −0.002 (4) | 0.004 (4) |
C11 | 0.112 (7) | 0.076 (5) | 0.083 (5) | 0.008 (4) | 0.014 (6) | −0.004 (4) |
C12 | 0.111 (7) | 0.055 (4) | 0.111 (7) | 0.001 (5) | 0.023 (6) | 0.023 (5) |
C13 | 0.070 (6) | 0.074 (5) | 0.090 (6) | 0.012 (4) | 0.016 (4) | 0.019 (5) |
C14 | 0.054 (4) | 0.082 (5) | 0.073 (5) | 0.011 (5) | 0.004 (4) | 0.012 (4) |
C15 | 0.072 (6) | 0.118 (7) | 0.071 (5) | 0.010 (5) | −0.004 (4) | 0.014 (5) |
C16 | 0.077 (6) | 0.184 (11) | 0.069 (6) | 0.024 (7) | 0.004 (5) | 0.031 (7) |
C17 | 0.105 (8) | 0.106 (8) | 0.120 (9) | 0.017 (6) | 0.008 (7) | 0.039 (7) |
C18 | 0.086 (6) | 0.085 (6) | 0.118 (7) | 0.013 (5) | 0.013 (6) | 0.029 (6) |
C19 | 0.152 (10) | 0.120 (8) | 0.172 (9) | 0.031 (8) | 0.003 (8) | −0.078 (8) |
Mn1—N2 | 1.812 (6) | C6—H5B | 0.9700 |
Mn1—O2 | 1.829 (4) | C7—H6A | 0.9700 |
Mn1—O1 | 1.835 (5) | C7—H6B | 0.9700 |
Mn1—N1 | 1.836 (5) | C8—C9 | 1.401 (8) |
N1—C4 | 1.316 (8) | C8—H7 | 0.9300 |
N1—C6 | 1.470 (8) | C9—C10 | 1.412 (9) |
N2—C8 | 1.319 (7) | C9—C14 | 1.436 (8) |
N2—C7 | 1.475 (8) | C10—C11 | 1.441 (9) |
O1—C2 | 1.300 (7) | C11—C12 | 1.370 (9) |
C1—C2 | 1.521 (10) | C11—H10 | 0.9300 |
C1—H1A | 0.9600 | C12—C13 | 1.418 (10) |
C1—H1B | 0.9600 | C12—H11 | 0.9300 |
C1—H1C | 0.9600 | C13—C18 | 1.396 (10) |
O2—C10 | 1.303 (7) | C13—C14 | 1.408 (10) |
O3—C19 | 1.311 (9) | C14—C15 | 1.432 (9) |
O3—H4 | 0.8200 | C15—C16 | 1.414 (10) |
C2—C3 | 1.338 (8) | C15—H14 | 0.9300 |
C3—C4 | 1.439 (9) | C16—C17 | 1.375 (11) |
C3—H2 | 0.9300 | C16—H15 | 0.9300 |
C4—C5 | 1.520 (8) | C17—C18 | 1.346 (11) |
C5—H4A | 0.9600 | C17—H16 | 0.9300 |
C5—H4B | 0.9600 | C18—H17 | 0.9300 |
C5—H4C | 0.9600 | C19—H18A | 0.9600 |
C6—C7 | 1.506 (9) | C19—H18B | 0.9600 |
C6—H5A | 0.9700 | C19—H18C | 0.9600 |
N2—Mn1—O2 | 93.4 (2) | C6—C7—H6A | 110.2 |
N2—Mn1—O1 | 174.9 (2) | N2—C7—H6B | 110.2 |
O2—Mn1—O1 | 83.98 (18) | C6—C7—H6B | 110.2 |
N2—Mn1—N1 | 86.9 (2) | H6A—C7—H6B | 108.5 |
O2—Mn1—N1 | 173.7 (2) | N2—C8—C9 | 124.5 (6) |
O1—Mn1—N1 | 96.2 (2) | N2—C8—H7 | 117.8 |
C4—N1—C6 | 118.1 (6) | C9—C8—H7 | 117.8 |
C4—N1—Mn1 | 126.0 (5) | C8—C9—C10 | 119.8 (6) |
C6—N1—Mn1 | 114.8 (4) | C8—C9—C14 | 120.6 (6) |
C8—N2—C7 | 118.7 (6) | C10—C9—C14 | 119.6 (6) |
C8—N2—Mn1 | 128.5 (4) | O2—C10—C9 | 124.9 (6) |
C7—N2—Mn1 | 112.7 (4) | O2—C10—C11 | 116.8 (6) |
C2—O1—Mn1 | 125.3 (4) | C9—C10—C11 | 118.3 (7) |
C2—C1—H1A | 109.5 | C12—C11—C10 | 121.3 (7) |
C2—C1—H1B | 109.5 | C12—C11—H10 | 119.3 |
H1A—C1—H1B | 109.5 | C10—C11—H10 | 119.3 |
C2—C1—H1C | 109.5 | C11—C12—C13 | 121.2 (7) |
H1A—C1—H1C | 109.5 | C11—C12—H11 | 119.4 |
H1B—C1—H1C | 109.5 | C13—C12—H11 | 119.4 |
C10—O2—Mn1 | 127.5 (4) | C18—C13—C14 | 121.6 (8) |
C19—O3—H4 | 109.5 | C18—C13—C12 | 119.7 (8) |
O1—C2—C3 | 124.8 (6) | C14—C13—C12 | 118.7 (7) |
O1—C2—C1 | 114.5 (6) | C13—C14—C15 | 116.5 (7) |
C3—C2—C1 | 120.7 (7) | C13—C14—C9 | 120.7 (7) |
C2—C3—C4 | 125.8 (7) | C15—C14—C9 | 122.7 (7) |
C2—C3—H2 | 117.1 | C16—C15—C14 | 118.2 (8) |
C4—C3—H2 | 117.1 | C16—C15—H14 | 120.9 |
N1—C4—C3 | 120.6 (6) | C14—C15—H14 | 120.9 |
N1—C4—C5 | 120.9 (8) | C17—C16—C15 | 123.7 (9) |
C3—C4—C5 | 118.4 (7) | C17—C16—H15 | 118.2 |
C4—C5—H4A | 109.5 | C15—C16—H15 | 118.2 |
C4—C5—H4B | 109.5 | C18—C17—C16 | 117.5 (10) |
H4A—C5—H4B | 109.5 | C18—C17—H16 | 121.2 |
C4—C5—H4C | 109.5 | C16—C17—H16 | 121.2 |
H4A—C5—H4C | 109.5 | C17—C18—C13 | 122.3 (9) |
H4B—C5—H4C | 109.5 | C17—C18—H17 | 118.8 |
N1—C6—C7 | 106.4 (5) | C13—C18—H17 | 118.8 |
N1—C6—H5A | 110.4 | O3—C19—H18A | 109.5 |
C7—C6—H5A | 110.4 | O3—C19—H18B | 109.5 |
N1—C6—H5B | 110.4 | H18A—C19—H18B | 109.5 |
C7—C6—H5B | 110.4 | O3—C19—H18C | 109.5 |
H5A—C6—H5B | 108.6 | H18A—C19—H18C | 109.5 |
N2—C7—C6 | 107.6 (6) | H18B—C19—H18C | 109.5 |
N2—C7—H6A | 110.2 |
Experimental details
Crystal data | |
Chemical formula | [Mn(C18H18N2O2)]·CH4O |
Mr | 381.33 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 298 |
a, b, c (Å) | 7.3800 (16), 10.8935 (14), 22.01 (2) |
V (Å3) | 1769.6 (18) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.77 |
Crystal size (mm) | 0.48 × 0.32 × 0.29 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.709, 0.808 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9257, 3122, 1863 |
Rint | 0.081 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.050, 0.152, 0.91 |
No. of reflections | 3122 |
No. of parameters | 227 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.29, −0.29 |
Absolute structure | Flack (1983), 1306 Friedel pairs |
Absolute structure parameter | −0.14 (4) |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 1997a), SHELXL97 (Sheldrick, 1997a), SHELXTL (Sheldrick, 1997b).
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Complexes synthesized from manganese and Schiff base ligand have been of great interest for many years. They are very important in the development of coordination chemistry. As an extension of the research on the structural characterization of Mn compounds, we report here the crystal structure of a new mononuclear manganese(II) complex.
The title compound is an electronically neutral mononuclear manganese(II) complex. The MnII ion in the compound is four coordinated by two N atoms and two O atoms from the asymmetrical tetradentate Schiff base ligand H2hemn (H2hemn= 1-((E)-(2-((E)-((Z)-4-hydroxypent-3-en-2-ylidene)amino)ethylimino)methyl)naphthalen-2-ol) in an approximately square-planar geometry. The Mn—N2 bond distance (1.812 (6) Å) is shorter than Mn—N1(1.836 (5) Å) and the other two Mn—O bonds distance (Mn—O1=1.835 (5) Å, Mn—O2=1.829 (4) Å). There is O—H···O hydrogen bond interaction between the complex and the methanol solvent molecule (Table 1).