organic compounds
2-((E)-{3-[(E)-2-Hydroxy-3,5-diiodobenzylideneamino]-2,2-dimethylpropyl}iminomethyl)-4,6-diiodophenol
aDepartment of Chemistry, Payame Noor University, PO Box 19395-3697 Tehran, I. R. of Iran, bX-ray Crystallography Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran, cDepartment of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran, and dDepartment of Physics, University of Sargodha, Punjab, Pakistan
*Correspondence e-mail: zsrkk@yahoo.com, dmntahir_uos@yahoo.com
The 19H18I4N2O2, comprises a potentially tetradentate Schiff base ligand. The disordered H atoms on the N and O atoms were refined with site occupancies of 0.54 (8)/0.46 (8) and 0.59 (7)/0.41 (7), respectively. The dihedral angle between the benzene rings is 73.3 (3)°. Intramolecular O—H⋯N and N—H⋯O hydrogen bonds make S(6) ring motifs. Short I⋯I [3.8919 (7) Å] and I⋯Cg [Cg is a ring centroid; 3.911 (2) Å] contacts are present in the The is further stabilized by intermolecular π–π interactions [centroid-to-centroid distance = 3.827 (3) Å].
of the title compound, CRelated literature
For related structures, see for example: Kargar et al. (2011, 2012); Kia et al. (2010). For standard values of bond lengths, see: Allen et al. (1987). For details of hydrogen-bond motifs, see: Bernstein et al. (1995). For van der Waals radii, see: Bondi (1964).
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, 2009).
Supporting information
10.1107/S1600536812003704/vm2150sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812003704/vm2150Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812003704/vm2150Isup3.cml
The title compound was synthesized by adding 3,5-diiodo-salicylaldehyde (2 mmol) to a solution of 2,2-dimethyl-1,3-propanediamine (1 mmol) in ethanol (30 ml). The mixture was refluxed with stirring for half an hour. The resultant solution was filtered. Yellow single crystals of the title compound suitable for X-ray
were recrystallized from ethanol by slow evaporation of the solvents at room temperature over several days.The O- and N-bound H atoms were located in difference Fourier map and then constrained to refine to the parent atoms with Uiso(H) = 1.2Ueq(N) and Uiso(H) = 1.5Ueq(O), respectively. The C-bound H-atoms were included in calculated positions and treated as riding atoms: C—H = 0.93, 0.96 and 0.97 Å for CH, CH3 and CH2 H-atoms, respectively, with Uiso(H) = k x Ueq(C), where k = 1.5 for CH3 H-atoms, and k = 1.2 for all other H-atoms.
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, 2009).C19H18I4N2O2 | F(000) = 2992 |
Mr = 813.95 | Dx = 2.356 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 3211 reflections |
a = 12.2057 (5) Å | θ = 2.5–27.5° |
b = 11.8169 (5) Å | µ = 5.45 mm−1 |
c = 31.8157 (15) Å | T = 291 K |
V = 4588.9 (3) Å3 | Block, yellow |
Z = 8 | 0.18 × 0.12 × 0.08 mm |
Bruker SMART APEXII CCD area-detector diffractometer | 5472 independent reflections |
Radiation source: fine-focus sealed tube | 2871 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.099 |
ϕ and ω scans | θmax = 27.9°, θmin = 1.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −15→16 |
Tmin = 0.441, Tmax = 0.670 | k = −15→14 |
39183 measured reflections | l = −41→39 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.079 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0213P)2] where P = (Fo2 + 2Fc2)/3 |
5471 reflections | (Δ/σ)max = 0.001 |
248 parameters | Δρmax = 1.11 e Å−3 |
0 restraints | Δρmin = −0.94 e Å−3 |
C19H18I4N2O2 | V = 4588.9 (3) Å3 |
Mr = 813.95 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 12.2057 (5) Å | µ = 5.45 mm−1 |
b = 11.8169 (5) Å | T = 291 K |
c = 31.8157 (15) Å | 0.18 × 0.12 × 0.08 mm |
Bruker SMART APEXII CCD area-detector diffractometer | 5472 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2871 reflections with I > 2σ(I) |
Tmin = 0.441, Tmax = 0.670 | Rint = 0.099 |
39183 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.079 | H-atom parameters constrained |
S = 1.00 | Δρmax = 1.11 e Å−3 |
5471 reflections | Δρmin = −0.94 e Å−3 |
248 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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) | |
I1 | 0.67018 (4) | 0.26848 (5) | 0.383838 (17) | 0.06718 (18) | |
I2 | 1.02767 (3) | 0.17675 (4) | 0.508635 (14) | 0.04527 (13) | |
I3 | 0.82622 (4) | 0.00536 (4) | 0.001078 (17) | 0.06243 (17) | |
I4 | 0.65930 (4) | −0.30987 (4) | 0.131933 (17) | 0.06028 (17) | |
O1 | 0.8328 (3) | 0.1220 (4) | 0.32918 (15) | 0.0501 (12) | |
H1 | 0.8784 | 0.0964 | 0.3128 | 0.075* | 0.46 (8) |
O2 | 0.8775 (3) | −0.2231 (3) | 0.17564 (15) | 0.0475 (12) | |
H2 | 0.9371 | −0.2077 | 0.1860 | 0.071* | 0.59 (7) |
N1 | 0.9942 (4) | −0.0017 (4) | 0.31029 (17) | 0.0421 (14) | |
H1A | 0.9424 | 0.0253 | 0.3063 | 0.051* | 0.54 (8) |
N2 | 1.0582 (4) | −0.1182 (4) | 0.18514 (18) | 0.0421 (14) | |
H1B | 1.0104 | −0.1580 | 0.2007 | 0.051* | 0.41 (7) |
C1 | 0.8751 (5) | 0.1317 (5) | 0.3665 (2) | 0.0337 (15) | |
C2 | 0.8201 (4) | 0.1925 (5) | 0.3985 (2) | 0.0379 (16) | |
C3 | 0.8633 (5) | 0.2052 (5) | 0.4382 (2) | 0.0365 (16) | |
H3 | 0.8259 | 0.2468 | 0.4584 | 0.044* | |
C4 | 0.9642 (5) | 0.1548 (5) | 0.44789 (19) | 0.0333 (15) | |
C5 | 1.0178 (5) | 0.0919 (5) | 0.41839 (19) | 0.0331 (15) | |
H5 | 1.0838 | 0.0574 | 0.4254 | 0.040* | |
C6 | 0.9755 (5) | 0.0782 (5) | 0.37794 (19) | 0.0313 (14) | |
C7 | 1.0307 (5) | 0.0096 (5) | 0.3477 (2) | 0.0370 (16) | |
H7 | 1.0947 | −0.0278 | 0.3554 | 0.044* | |
C8 | 1.0466 (5) | −0.0734 (5) | 0.2792 (2) | 0.0436 (17) | |
H8A | 0.9906 | −0.1139 | 0.2637 | 0.052* | |
H8B | 1.0916 | −0.1290 | 0.2935 | 0.052* | |
C9 | 1.1191 (5) | −0.0066 (5) | 0.2478 (2) | 0.0381 (16) | |
C10 | 1.2243 (5) | 0.0305 (6) | 0.2697 (2) | 0.067 (2) | |
H10A | 1.2693 | 0.0719 | 0.2503 | 0.100* | |
H10B | 1.2634 | −0.0350 | 0.2794 | 0.100* | |
H10C | 1.2065 | 0.0780 | 0.2932 | 0.100* | |
C11 | 1.0597 (5) | 0.0973 (5) | 0.2311 (2) | 0.054 (2) | |
H11A | 1.1027 | 0.1317 | 0.2093 | 0.081* | |
H11B | 1.0490 | 0.1505 | 0.2535 | 0.081* | |
H11C | 0.9898 | 0.0752 | 0.2198 | 0.081* | |
C12 | 1.1517 (4) | −0.0858 (5) | 0.2119 (2) | 0.0426 (17) | |
H12A | 1.2066 | −0.0488 | 0.1947 | 0.051* | |
H12B | 1.1844 | −0.1537 | 0.2236 | 0.051* | |
C13 | 1.0478 (5) | −0.0796 (5) | 0.1485 (2) | 0.0392 (17) | |
H13 | 1.1029 | −0.0336 | 0.1377 | 0.047* | |
C14 | 0.9534 (5) | −0.1038 (5) | 0.1222 (2) | 0.0340 (15) | |
C15 | 0.9413 (5) | −0.0561 (5) | 0.0826 (2) | 0.0359 (16) | |
H15 | 0.9962 | −0.0092 | 0.0723 | 0.043* | |
C16 | 0.8510 (5) | −0.0761 (5) | 0.0583 (2) | 0.0361 (16) | |
C17 | 0.7708 (5) | −0.1491 (5) | 0.0727 (2) | 0.0406 (17) | |
H17 | 0.7100 | −0.1646 | 0.0560 | 0.049* | |
C18 | 0.7804 (5) | −0.1982 (5) | 0.1111 (2) | 0.0352 (16) | |
C19 | 0.8699 (5) | −0.1780 (5) | 0.1381 (2) | 0.0329 (15) |
U11 | U22 | U33 | U12 | U13 | U23 | |
I1 | 0.0476 (3) | 0.1081 (5) | 0.0458 (3) | 0.0294 (3) | 0.0003 (3) | −0.0007 (3) |
I2 | 0.0508 (3) | 0.0558 (3) | 0.0292 (2) | 0.0012 (2) | −0.0041 (2) | −0.0020 (2) |
I3 | 0.0643 (3) | 0.0714 (4) | 0.0516 (4) | 0.0043 (2) | −0.0106 (3) | 0.0231 (3) |
I4 | 0.0551 (3) | 0.0626 (3) | 0.0631 (4) | −0.0240 (2) | −0.0120 (3) | 0.0108 (3) |
O1 | 0.041 (3) | 0.078 (3) | 0.031 (3) | 0.007 (2) | −0.005 (2) | −0.010 (3) |
O2 | 0.049 (3) | 0.056 (3) | 0.037 (3) | −0.012 (2) | −0.002 (2) | 0.005 (2) |
N1 | 0.038 (3) | 0.053 (4) | 0.035 (4) | −0.002 (3) | 0.009 (3) | −0.007 (3) |
N2 | 0.044 (3) | 0.055 (4) | 0.027 (4) | 0.000 (3) | −0.002 (3) | −0.008 (3) |
C1 | 0.030 (4) | 0.043 (4) | 0.028 (4) | −0.009 (3) | 0.005 (3) | 0.003 (3) |
C2 | 0.029 (4) | 0.052 (4) | 0.033 (4) | −0.001 (3) | 0.002 (3) | 0.002 (3) |
C3 | 0.044 (4) | 0.034 (4) | 0.032 (4) | −0.004 (3) | 0.006 (3) | −0.004 (3) |
C4 | 0.042 (4) | 0.037 (4) | 0.022 (4) | −0.006 (3) | 0.006 (3) | 0.005 (3) |
C5 | 0.030 (3) | 0.043 (4) | 0.027 (4) | −0.002 (3) | 0.004 (3) | 0.007 (3) |
C6 | 0.039 (4) | 0.032 (4) | 0.023 (4) | −0.001 (3) | 0.006 (3) | 0.000 (3) |
C7 | 0.047 (4) | 0.034 (4) | 0.030 (4) | −0.002 (3) | 0.004 (3) | −0.005 (3) |
C8 | 0.047 (4) | 0.053 (4) | 0.031 (4) | −0.001 (3) | 0.002 (3) | −0.009 (4) |
C9 | 0.038 (4) | 0.050 (4) | 0.027 (4) | −0.002 (3) | −0.002 (3) | −0.009 (3) |
C10 | 0.046 (5) | 0.103 (7) | 0.051 (6) | −0.016 (4) | −0.008 (4) | −0.033 (5) |
C11 | 0.069 (5) | 0.054 (5) | 0.038 (5) | 0.002 (4) | 0.008 (4) | 0.001 (4) |
C12 | 0.030 (4) | 0.066 (5) | 0.032 (4) | −0.003 (3) | −0.002 (3) | −0.011 (4) |
C13 | 0.036 (4) | 0.043 (4) | 0.038 (5) | 0.003 (3) | 0.003 (3) | −0.016 (4) |
C14 | 0.034 (4) | 0.038 (4) | 0.030 (4) | −0.002 (3) | −0.002 (3) | −0.003 (3) |
C15 | 0.040 (4) | 0.032 (4) | 0.036 (4) | 0.001 (3) | 0.005 (3) | −0.001 (3) |
C16 | 0.039 (4) | 0.034 (4) | 0.035 (4) | 0.010 (3) | −0.002 (3) | 0.000 (3) |
C17 | 0.035 (4) | 0.044 (4) | 0.043 (5) | 0.000 (3) | −0.009 (3) | −0.002 (4) |
C18 | 0.037 (4) | 0.031 (4) | 0.038 (4) | −0.007 (3) | 0.000 (3) | −0.005 (3) |
C19 | 0.040 (4) | 0.024 (4) | 0.034 (4) | 0.002 (3) | 0.005 (3) | −0.004 (3) |
I1—C2 | 2.091 (6) | C8—C9 | 1.550 (8) |
I2—C4 | 2.098 (6) | C8—H8A | 0.9700 |
I3—C16 | 2.081 (6) | C8—H8B | 0.9700 |
I4—C18 | 2.090 (6) | C9—C11 | 1.522 (8) |
O1—C1 | 1.301 (7) | C9—C10 | 1.526 (8) |
O1—H1 | 0.8203 | C9—C12 | 1.530 (8) |
O2—C19 | 1.312 (7) | C10—H10A | 0.9600 |
O2—H2 | 0.8201 | C10—H10B | 0.9600 |
N1—C7 | 1.278 (8) | C10—H10C | 0.9600 |
N1—C8 | 1.452 (7) | C11—H11A | 0.9600 |
N1—H1A | 0.7184 | C11—H11B | 0.9600 |
N2—C13 | 1.259 (8) | C11—H11C | 0.9600 |
N2—C12 | 1.474 (7) | C12—H12A | 0.9700 |
N2—H1B | 0.8984 | C12—H12B | 0.9700 |
C1—C2 | 1.416 (8) | C13—C14 | 1.452 (8) |
C1—C6 | 1.426 (8) | C13—H13 | 0.9300 |
C2—C3 | 1.376 (8) | C14—C15 | 1.388 (8) |
C3—C4 | 1.403 (8) | C14—C19 | 1.436 (8) |
C3—H3 | 0.9300 | C15—C16 | 1.367 (8) |
C4—C5 | 1.364 (8) | C15—H15 | 0.9300 |
C5—C6 | 1.396 (8) | C16—C17 | 1.383 (8) |
C5—H5 | 0.9300 | C17—C18 | 1.359 (8) |
C6—C7 | 1.427 (8) | C17—H17 | 0.9300 |
C7—H7 | 0.9300 | C18—C19 | 1.408 (8) |
C1—O1—H1 | 110.0 | C12—C9—C8 | 108.6 (5) |
C19—O2—H2 | 109.8 | C9—C10—H10A | 109.5 |
C7—N1—C8 | 122.8 (6) | C9—C10—H10B | 109.5 |
C7—N1—H1A | 115.1 | H10A—C10—H10B | 109.5 |
C8—N1—H1A | 121.8 | C9—C10—H10C | 109.5 |
C13—N2—C12 | 121.2 (6) | H10A—C10—H10C | 109.5 |
C13—N2—H1B | 129.4 | H10B—C10—H10C | 109.5 |
C12—N2—H1B | 108.7 | C9—C11—H11A | 109.5 |
O1—C1—C2 | 120.8 (6) | C9—C11—H11B | 109.5 |
O1—C1—C6 | 122.4 (6) | H11A—C11—H11B | 109.5 |
C2—C1—C6 | 116.7 (6) | C9—C11—H11C | 109.5 |
C3—C2—C1 | 122.2 (6) | H11A—C11—H11C | 109.5 |
C3—C2—I1 | 119.6 (5) | H11B—C11—H11C | 109.5 |
C1—C2—I1 | 118.2 (5) | N2—C12—C9 | 112.8 (5) |
C2—C3—C4 | 119.5 (6) | N2—C12—H12A | 109.0 |
C2—C3—H3 | 120.2 | C9—C12—H12A | 109.0 |
C4—C3—H3 | 120.2 | N2—C12—H12B | 109.0 |
C5—C4—C3 | 120.0 (6) | C9—C12—H12B | 109.0 |
C5—C4—I2 | 121.6 (5) | H12A—C12—H12B | 107.8 |
C3—C4—I2 | 118.4 (4) | N2—C13—C14 | 122.8 (6) |
C4—C5—C6 | 121.3 (6) | N2—C13—H13 | 118.6 |
C4—C5—H5 | 119.3 | C14—C13—H13 | 118.6 |
C6—C5—H5 | 119.3 | C15—C14—C19 | 119.4 (6) |
C5—C6—C1 | 120.1 (5) | C15—C14—C13 | 121.8 (6) |
C5—C6—C7 | 120.9 (6) | C19—C14—C13 | 118.8 (6) |
C1—C6—C7 | 119.0 (6) | C16—C15—C14 | 122.0 (6) |
N1—C7—C6 | 121.5 (6) | C16—C15—H15 | 119.0 |
N1—C7—H7 | 119.2 | C14—C15—H15 | 119.0 |
C6—C7—H7 | 119.2 | C15—C16—C17 | 119.4 (6) |
N1—C8—C9 | 113.2 (5) | C15—C16—I3 | 122.2 (5) |
N1—C8—H8A | 108.9 | C17—C16—I3 | 118.4 (5) |
C9—C8—H8A | 108.9 | C18—C17—C16 | 120.2 (6) |
N1—C8—H8B | 108.9 | C18—C17—H17 | 119.9 |
C9—C8—H8B | 108.9 | C16—C17—H17 | 119.9 |
H8A—C8—H8B | 107.8 | C17—C18—C19 | 122.9 (6) |
C11—C9—C10 | 109.2 (5) | C17—C18—I4 | 119.6 (5) |
C11—C9—C12 | 110.9 (5) | C19—C18—I4 | 117.6 (5) |
C10—C9—C12 | 107.3 (5) | O2—C19—C18 | 122.7 (6) |
C11—C9—C8 | 111.4 (5) | O2—C19—C14 | 121.2 (6) |
C10—C9—C8 | 109.4 (6) | C18—C19—C14 | 116.1 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O1 | 0.72 | 1.90 | 2.526 (6) | 145 |
O2—H2···N2 | 0.82 | 1.82 | 2.548 (6) | 148 |
Experimental details
Crystal data | |
Chemical formula | C19H18I4N2O2 |
Mr | 813.95 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 291 |
a, b, c (Å) | 12.2057 (5), 11.8169 (5), 31.8157 (15) |
V (Å3) | 4588.9 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 5.45 |
Crystal size (mm) | 0.18 × 0.12 × 0.08 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.441, 0.670 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 39183, 5472, 2871 |
Rint | 0.099 |
(sin θ/λ)max (Å−1) | 0.658 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.079, 1.00 |
No. of reflections | 5471 |
No. of parameters | 248 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.11, −0.94 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O1 | 0.72 | 1.90 | 2.526 (6) | 145 |
O2—H2···N2 | 0.82 | 1.82 | 2.548 (6) | 148 |
Acknowledgements
HK and TS thank Payame Noor University for the financial support. MNT thanks the GC University of Sargodha, Pakistan, for research facilities.
References
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In continuation of our work on the crystal structure of Schiff base ligands (Kargar et al., 2011, 2012; Kia et al., 2010), we determined the X-ray structure of the title compound.
The asymmetric unit of the title compound, Fig. 1, comprises a potentially tetradentate Schiff base ligand. In the crystal structure the phenolic H atoms are disordered over a second position on the Schiff base N atoms. The bond lengths and angles are within the normal ranges (Allen et al., 1987) and are comparable to related structures (Kargar et al., 2011, 2012; Kia et al., 2010).
The intramolecular N—H···O and O—H···N hydrogen bonds (Table 1) make S(6) ring motifs (Bernstein et al., 1995). The dihedral angle between the benzene rings is 73.3 (3)°. Short I(1)···I(2)i [3.8919 (7) Å; (i) 1/2 + x, 1/2 - y, 1 - z ] and I4···Cg2ii [3.911 (2) Å; (ii) 3/2 - x, -1/2 + y, z; Cg2 is the centroid of the C14–C19 ring] contacts are present in the crystal structure (Fig. 2). The crystal structure is further stabilized by the intermolecular π–π interaction [Cg1···Cg2i = 3.827 (3)Å; (i) 2 - x, 1/2 + y, 1/2 - z; Cg1 and Cg2 are the centroids of the C1–C6 and C14–C19 benzene rings].