organic compounds
N1,N1-diethyl-N4-[(quinolin-2-yl)methylidene]benzene-1,4-diamine
ofaDepartment of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP 208 016, India, and bDepartment of Chemistry, I.H.S. Khandari, Dr B. R. Ambedkar University, Agra 282 002, India
*Correspondence e-mail: saleem.7javed@gmail.com
The title compound, C20H21N3, is non-planar with a dihedral angle between the planes of the quinoline and phenylenediamine rings of 9.40 (4)°. In the crystal, molecules are connected by C—H⋯π interactions, generating a chain extending along the a-axis direction. Weak C—H⋯π interactions also occur.
Keywords: crystal structure; benzene-1,4-diamine; quinoline; C—H⋯π interactions; quinolinyl-containing Schiff bases.
CCDC reference: 1038674
1. Related literature
For applications of quinolinyl-containing et al. (2013); Jursic et al. (2002); Motswainyana et al. (2013); Song et al. (2011). The present work is part of an ongoing structural study of Schiff base–metal complexes, see: Faizi & Hussain (2014); Faizi & Sen (2014); Faizi et al. (2014). For related and their applications, see: Gonzalez et al. (2012); Patra & Goldberg (2003).
see: Das2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: SMART (Bruker, 2003); cell SAINT (Bruker, 2003); data reduction: SAINT; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008b); molecular graphics: DIAMOND (Brandenberg & Putz, 2005); software used to prepare material for publication: DIAMOND.
Supporting information
CCDC reference: 1038674
https://doi.org/10.1107/S2056989014027108/hg5416sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989014027108/hg5416Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989014027108/hg5416Isup3.cml
100 mg (1 mmol) of N1,N1-diethyl-p-phenylenediamine were dissolved in 10 ml of absolute ethanol. To this solution, 96 mg (1 mmol) of 2-quinolinecarboxaldehyde in 5 ml of absolute ethanol was dropwisely added under stirring. Then, this mixture was stirred for 10 min, two drops of glacial acetic acid were then added and the mixture was further refluxed for 2h. The resulting yellow precipitate was recovered by filtration, washed several times with a small portions of EtOH and then with diethyl ether to give 160 mg (88%) of N1,N1-diethyl-N4-(quinolin-2-ylmethylene)benzene-1,4-diamine (DQMBD). The crystal of the title compound suitable for X-ray analysis was obtained within 4 days by slow evaporation of the EtOH solvent.
the N-bound H-atoms were located in difference Fourier maps,and their positions were then held fixed. All H-atoms were positioned geometrically and refined using a riding model with C—H = 0.92–0.93 Å and Uiso(H) = 1.2Ueq(C).
Quinoline derivatives of π, generating a chain extending along the a axis direction. In the crystal molecules are connected by C—H···π, giving an overall two-dimensional layered structure lying parallel to (100) is given in Fig. 2.
are important building blocks of many important compounds widely used in biological applications such as antioxidative and anticancer and fluorescent probe agents in industry and in coordination chemistry (Motswainyana et al., 2013; Das et al., 2013; Song et al., 2011; Jursic et al., 2002). The present work is part of an ongoing structural study of Schiff base metal complexes (Faizi & Hussain, 2014; Faizi & Sen, 2014; Faizi et al. 2014) and we report here the structure of N1,N1-diethyl-N4-[(quinolin-2-yl)methylidene]benzene-1,4-diamine (DQMBD). There are very few examples similar to title compound and their metal complex have been reported in the literature (Patra & Goldberg 2003; Gonzalez et al., 2012). The synthesis of DQMBD by condensation of 2-quinolinecarboxaldehyde and N1,N1-diethyl-p-phenylenediamine has not previously been reported. In the title compound (Fig. 1) DQMBD has non planar structure, the dihedral angle between the quinolinyl and pphenylenediamine rings is 9.40 (4)°. In the crystal, molecules are connected by C—H···For applications of quinolinyl-containing
see: Das et al. (2013); Jursic et al. (2002); Motswainyana et al. (2013); Song et al. (2011). The present work is part of an ongoing structural study of Schiff base–metal complexes, see: Faizi & Hussain (2014); Faizi & Sen (2014); Faizi et al. (2014). For related and their applications, see: Gonzalez et al. (2012); Patra & Goldberg (2003).Data collection: SMART (Bruker, 2003); cell
SAINT (Bruker, 2003); data reduction: SAINT (Bruker, 2003); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008b); molecular graphics: DIAMOND (Brandenberg & Putz, 2005); software used to prepare material for publication: DIAMOND (Brandenberg & Putz, 2005).Fig. 1. The molecular conformation and atom-numbering scheme for the title compound, with non-H atoms drawn as 40% probability displacement ellipsoids. | |
Fig. 2. The molecular packing viewed along the a direction. |
C20H21N3 | F(000) = 1296 |
Mr = 303.40 | Dx = 1.206 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 1765 reflections |
a = 20.354 (5) Å | θ = 2.7–27.5° |
b = 7.534 (5) Å | µ = 0.07 mm−1 |
c = 21.801 (5) Å | T = 100 K |
V = 3343 (2) Å3 | Needle, yellow |
Z = 8 | 0.27 × 0.21 × 0.16 mm |
Bruker SMART APEX CCD diffractometer | 2937 independent reflections |
Radiation source: fine-focus sealed tube | 1912 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.146 |
/w–scans | θmax = 25.0°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2008a) | h = −24→23 |
Tmin = 0.981, Tmax = 0.989 | k = −8→8 |
14928 measured reflections | l = −18→25 |
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)] = 0.084 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.195 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | w = 1/[σ2(Fo2) + (0.0662P)2 + 3.082P] where P = (Fo2 + 2Fc2)/3 |
2937 reflections | (Δ/σ)max < 0.001 |
212 parameters | Δρmax = 0.32 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
C20H21N3 | V = 3343 (2) Å3 |
Mr = 303.40 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 20.354 (5) Å | µ = 0.07 mm−1 |
b = 7.534 (5) Å | T = 100 K |
c = 21.801 (5) Å | 0.27 × 0.21 × 0.16 mm |
Bruker SMART APEX CCD diffractometer | 2937 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2008a) | 1912 reflections with I > 2σ(I) |
Tmin = 0.981, Tmax = 0.989 | Rint = 0.146 |
14928 measured reflections |
R[F2 > 2σ(F2)] = 0.084 | 0 restraints |
wR(F2) = 0.195 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | Δρmax = 0.32 e Å−3 |
2937 reflections | Δρmin = −0.23 e Å−3 |
212 parameters |
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 | ||
C1 | 0.35623 (17) | −0.0493 (5) | 0.07353 (16) | 0.0221 (9) | |
C2 | 0.38904 (17) | −0.1200 (5) | 0.12533 (16) | 0.0243 (9) | |
H2 | 0.4301 | −0.1726 | 0.1205 | 0.029* | |
C3 | 0.36114 (17) | −0.1119 (5) | 0.18233 (16) | 0.0241 (9) | |
H3 | 0.3830 | −0.1600 | 0.2159 | 0.029* | |
C4 | 0.29920 (19) | −0.0306 (5) | 0.19034 (17) | 0.0292 (10) | |
H4 | 0.2806 | −0.0249 | 0.2292 | 0.035* | |
C5 | 0.26640 (18) | 0.0397 (5) | 0.14123 (16) | 0.0246 (9) | |
H5 | 0.2257 | 0.0930 | 0.1472 | 0.029* | |
C6 | 0.29346 (17) | 0.0326 (4) | 0.08169 (16) | 0.0195 (8) | |
C7 | 0.26231 (17) | 0.0998 (5) | 0.02881 (16) | 0.0233 (9) | |
H7 | 0.2216 | 0.1552 | 0.0322 | 0.028* | |
C8 | 0.29143 (17) | 0.0843 (5) | −0.02734 (16) | 0.0237 (9) | |
H8 | 0.2705 | 0.1256 | −0.0625 | 0.028* | |
C9 | 0.35419 (17) | 0.0040 (5) | −0.03101 (16) | 0.0204 (8) | |
C10 | 0.38967 (19) | −0.0092 (5) | −0.08980 (17) | 0.0232 (9) | |
C11 | 0.39650 (17) | 0.0327 (5) | −0.19610 (15) | 0.0208 (8) | |
C12 | 0.45481 (18) | −0.0590 (5) | −0.20748 (16) | 0.0229 (8) | |
H12 | 0.4741 | −0.1235 | −0.1759 | 0.027* | |
C13 | 0.48440 (17) | −0.0565 (5) | −0.26392 (15) | 0.0225 (9) | |
H13 | 0.5233 | −0.1190 | −0.2696 | 0.027* | |
C14 | 0.45734 (17) | 0.0384 (5) | −0.31347 (15) | 0.0197 (8) | |
C15 | 0.39852 (16) | 0.1316 (5) | −0.30210 (16) | 0.0208 (8) | |
H15 | 0.3792 | 0.1971 | −0.3335 | 0.025* | |
C16 | 0.36925 (17) | 0.1269 (5) | −0.24513 (15) | 0.0199 (8) | |
H16 | 0.3301 | 0.1883 | −0.2391 | 0.024* | |
C17 | 0.46058 (17) | 0.1451 (5) | −0.42064 (15) | 0.0226 (9) | |
H17A | 0.4951 | 0.1662 | −0.4505 | 0.027* | |
H17B | 0.4464 | 0.2595 | −0.4051 | 0.027* | |
C18 | 0.40284 (17) | 0.0555 (5) | −0.45265 (16) | 0.0255 (9) | |
H18A | 0.3874 | 0.1299 | −0.4854 | 0.038* | |
H18B | 0.3680 | 0.0367 | −0.4237 | 0.038* | |
H18C | 0.4167 | −0.0567 | −0.4691 | 0.038* | |
C19 | 0.54187 (16) | −0.0777 (5) | −0.38531 (15) | 0.0213 (8) | |
H19A | 0.5381 | −0.1130 | −0.4280 | 0.026* | |
H19B | 0.5382 | −0.1839 | −0.3604 | 0.026* | |
C20 | 0.60919 (18) | 0.0044 (6) | −0.37512 (18) | 0.0308 (10) | |
H20A | 0.6426 | −0.0802 | −0.3856 | 0.046* | |
H20B | 0.6137 | 0.0375 | −0.3328 | 0.046* | |
H20C | 0.6137 | 0.1078 | −0.4005 | 0.046* | |
N1 | 0.38663 (14) | −0.0612 (4) | 0.01724 (13) | 0.0227 (8) | |
N2 | 0.36253 (14) | 0.0420 (4) | −0.13964 (13) | 0.0227 (7) | |
N3 | 0.48728 (14) | 0.0418 (4) | −0.37025 (12) | 0.0201 (7) | |
H10 | 0.4353 (17) | −0.053 (4) | −0.0845 (14) | 0.015 (9)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.021 (2) | 0.020 (2) | 0.025 (2) | −0.0063 (16) | 0.0031 (16) | −0.0065 (16) |
C2 | 0.019 (2) | 0.024 (2) | 0.030 (2) | −0.0016 (16) | 0.0000 (16) | −0.0058 (17) |
C3 | 0.025 (2) | 0.028 (2) | 0.0193 (19) | −0.0033 (17) | −0.0025 (16) | −0.0011 (16) |
C4 | 0.030 (2) | 0.033 (2) | 0.025 (2) | −0.0110 (18) | 0.0055 (17) | −0.0053 (18) |
C5 | 0.020 (2) | 0.027 (2) | 0.027 (2) | −0.0042 (16) | 0.0055 (16) | −0.0068 (17) |
C6 | 0.0166 (19) | 0.0157 (19) | 0.0261 (19) | −0.0065 (15) | 0.0018 (15) | −0.0037 (15) |
C7 | 0.016 (2) | 0.021 (2) | 0.033 (2) | 0.0013 (15) | 0.0014 (16) | −0.0035 (17) |
C8 | 0.023 (2) | 0.023 (2) | 0.025 (2) | −0.0025 (16) | −0.0044 (16) | −0.0014 (16) |
C9 | 0.022 (2) | 0.015 (2) | 0.0239 (19) | −0.0012 (15) | −0.0022 (15) | −0.0019 (15) |
C10 | 0.022 (2) | 0.022 (2) | 0.026 (2) | 0.0014 (16) | 0.0010 (16) | 0.0003 (16) |
C11 | 0.023 (2) | 0.023 (2) | 0.0170 (18) | −0.0011 (16) | 0.0016 (15) | −0.0021 (15) |
C12 | 0.026 (2) | 0.021 (2) | 0.0212 (19) | 0.0028 (16) | −0.0063 (16) | 0.0007 (16) |
C13 | 0.019 (2) | 0.025 (2) | 0.023 (2) | 0.0060 (16) | −0.0012 (15) | −0.0025 (16) |
C14 | 0.020 (2) | 0.020 (2) | 0.0191 (18) | −0.0048 (15) | −0.0011 (15) | −0.0034 (15) |
C15 | 0.0205 (19) | 0.022 (2) | 0.0196 (19) | 0.0039 (16) | −0.0061 (15) | 0.0010 (16) |
C16 | 0.0134 (18) | 0.024 (2) | 0.0224 (19) | −0.0006 (15) | −0.0029 (15) | −0.0050 (16) |
C17 | 0.022 (2) | 0.025 (2) | 0.0207 (19) | −0.0001 (16) | −0.0018 (15) | 0.0002 (16) |
C18 | 0.025 (2) | 0.031 (2) | 0.0203 (19) | 0.0025 (17) | 0.0002 (16) | 0.0029 (16) |
C19 | 0.019 (2) | 0.027 (2) | 0.0175 (19) | 0.0035 (15) | 0.0036 (15) | −0.0015 (16) |
C20 | 0.026 (2) | 0.034 (2) | 0.032 (2) | 0.0057 (18) | 0.0025 (17) | 0.0039 (19) |
N1 | 0.0247 (18) | 0.0214 (19) | 0.0221 (17) | −0.0012 (13) | 0.0046 (13) | −0.0022 (13) |
N2 | 0.0211 (17) | 0.0194 (17) | 0.0277 (18) | −0.0012 (13) | −0.0012 (13) | −0.0017 (14) |
N3 | 0.0177 (17) | 0.0266 (18) | 0.0161 (15) | 0.0078 (13) | −0.0002 (12) | 0.0001 (13) |
C1—N1 | 1.377 (4) | C12—C13 | 1.370 (5) |
C1—C2 | 1.416 (5) | C12—H12 | 0.9300 |
C1—C6 | 1.430 (5) | C13—C14 | 1.408 (5) |
C2—C3 | 1.368 (5) | C13—H13 | 0.9300 |
C2—H2 | 0.9300 | C14—N3 | 1.380 (4) |
C3—C4 | 1.412 (5) | C14—C15 | 1.410 (5) |
C3—H3 | 0.9300 | C15—C16 | 1.378 (5) |
C4—C5 | 1.368 (5) | C15—H15 | 0.9300 |
C4—H4 | 0.9300 | C16—H16 | 0.9300 |
C5—C6 | 1.411 (5) | C17—N3 | 1.452 (4) |
C5—H5 | 0.9300 | C17—C18 | 1.525 (5) |
C6—C7 | 1.410 (5) | C17—H17A | 0.9700 |
C7—C8 | 1.365 (5) | C17—H17B | 0.9700 |
C7—H7 | 0.9300 | C18—H18A | 0.9600 |
C8—C9 | 1.416 (5) | C18—H18B | 0.9600 |
C8—H8 | 0.9300 | C18—H18C | 0.9600 |
C9—N1 | 1.336 (4) | C19—N3 | 1.467 (4) |
C9—C10 | 1.474 (5) | C19—C20 | 1.519 (5) |
C10—N2 | 1.278 (5) | C19—H19A | 0.9700 |
C10—H10 | 0.99 (3) | C19—H19B | 0.9700 |
C11—C12 | 1.396 (5) | C20—H20A | 0.9600 |
C11—C16 | 1.398 (5) | C20—H20B | 0.9600 |
C11—N2 | 1.413 (4) | C20—H20C | 0.9600 |
N1—C1—C2 | 118.3 (3) | N3—C14—C13 | 121.7 (3) |
N1—C1—C6 | 122.7 (3) | N3—C14—C15 | 121.6 (3) |
C2—C1—C6 | 119.0 (3) | C13—C14—C15 | 116.8 (3) |
C3—C2—C1 | 120.8 (3) | C16—C15—C14 | 120.8 (3) |
C3—C2—H2 | 119.6 | C16—C15—H15 | 119.6 |
C1—C2—H2 | 119.6 | C14—C15—H15 | 119.6 |
C2—C3—C4 | 120.2 (3) | C15—C16—C11 | 122.1 (3) |
C2—C3—H3 | 119.9 | C15—C16—H16 | 119.0 |
C4—C3—H3 | 119.9 | C11—C16—H16 | 119.0 |
C5—C4—C3 | 120.4 (3) | N3—C17—C18 | 113.4 (3) |
C5—C4—H4 | 119.8 | N3—C17—H17A | 108.9 |
C3—C4—H4 | 119.8 | C18—C17—H17A | 108.9 |
C4—C5—C6 | 121.0 (4) | N3—C17—H17B | 108.9 |
C4—C5—H5 | 119.5 | C18—C17—H17B | 108.9 |
C6—C5—H5 | 119.5 | H17A—C17—H17B | 107.7 |
C7—C6—C5 | 124.3 (3) | C17—C18—H18A | 109.5 |
C7—C6—C1 | 117.1 (3) | C17—C18—H18B | 109.5 |
C5—C6—C1 | 118.7 (3) | H18A—C18—H18B | 109.5 |
C8—C7—C6 | 120.5 (3) | C17—C18—H18C | 109.5 |
C8—C7—H7 | 119.8 | H18A—C18—H18C | 109.5 |
C6—C7—H7 | 119.8 | H18B—C18—H18C | 109.5 |
C7—C8—C9 | 118.6 (3) | N3—C19—C20 | 113.6 (3) |
C7—C8—H8 | 120.7 | N3—C19—H19A | 108.8 |
C9—C8—H8 | 120.7 | C20—C19—H19A | 108.8 |
N1—C9—C8 | 124.0 (3) | N3—C19—H19B | 108.8 |
N1—C9—C10 | 114.7 (3) | C20—C19—H19B | 108.8 |
C8—C9—C10 | 121.3 (3) | H19A—C19—H19B | 107.7 |
N2—C10—C9 | 120.5 (3) | C19—C20—H20A | 109.5 |
N2—C10—H10 | 127.2 (18) | C19—C20—H20B | 109.5 |
C9—C10—H10 | 112.2 (18) | H20A—C20—H20B | 109.5 |
C12—C11—C16 | 116.9 (3) | C19—C20—H20C | 109.5 |
C12—C11—N2 | 126.5 (3) | H20A—C20—H20C | 109.5 |
C16—C11—N2 | 116.5 (3) | H20B—C20—H20C | 109.5 |
C13—C12—C11 | 121.8 (3) | C9—N1—C1 | 117.1 (3) |
C13—C12—H12 | 119.1 | C10—N2—C11 | 120.9 (3) |
C11—C12—H12 | 119.1 | C14—N3—C17 | 121.6 (3) |
C12—C13—C14 | 121.6 (3) | C14—N3—C19 | 121.6 (3) |
C12—C13—H13 | 119.2 | C17—N3—C19 | 116.3 (3) |
C14—C13—H13 | 119.2 | ||
N1—C1—C2—C3 | −180.0 (3) | C12—C13—C14—C15 | 0.4 (5) |
C6—C1—C2—C3 | 0.5 (5) | N3—C14—C15—C16 | −180.0 (3) |
C1—C2—C3—C4 | −0.7 (6) | C13—C14—C15—C16 | −0.7 (5) |
C2—C3—C4—C5 | 0.4 (6) | C14—C15—C16—C11 | 0.9 (5) |
C3—C4—C5—C6 | 0.1 (6) | C12—C11—C16—C15 | −0.7 (5) |
C4—C5—C6—C7 | 179.1 (3) | N2—C11—C16—C15 | 178.5 (3) |
C4—C5—C6—C1 | −0.2 (5) | C8—C9—N1—C1 | 0.4 (5) |
N1—C1—C6—C7 | 1.1 (5) | C10—C9—N1—C1 | 178.8 (3) |
C2—C1—C6—C7 | −179.5 (3) | C2—C1—N1—C9 | 179.0 (3) |
N1—C1—C6—C5 | −179.5 (3) | C6—C1—N1—C9 | −1.6 (5) |
C2—C1—C6—C5 | −0.1 (5) | C9—C10—N2—C11 | 178.9 (3) |
C5—C6—C7—C8 | −178.7 (3) | C12—C11—N2—C10 | 13.1 (6) |
C1—C6—C7—C8 | 0.6 (5) | C16—C11—N2—C10 | −166.1 (3) |
C6—C7—C8—C9 | −1.8 (5) | C13—C14—N3—C17 | −177.7 (3) |
C7—C8—C9—N1 | 1.3 (5) | C15—C14—N3—C17 | 1.5 (5) |
C7—C8—C9—C10 | −177.1 (3) | C13—C14—N3—C19 | 11.2 (5) |
N1—C9—C10—N2 | 177.1 (3) | C15—C14—N3—C19 | −169.6 (3) |
C8—C9—C10—N2 | −4.5 (5) | C18—C17—N3—C14 | −79.2 (4) |
C16—C11—C12—C13 | 0.4 (5) | C18—C17—N3—C19 | 92.3 (4) |
N2—C11—C12—C13 | −178.8 (3) | C20—C19—N3—C14 | −94.8 (4) |
C11—C12—C13—C14 | −0.2 (6) | C20—C19—N3—C17 | 93.7 (4) |
C12—C13—C14—N3 | 179.6 (3) |
Cg1, Cg2 and Cg3 are the centroids of the N1/C1/C6–C9, C1–C16 and C11–C16 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···Cg2i | 0.93 | 2.99 | 3.705 (5) | 135 |
C7—H7···Cg1i | 0.93 | 2.90 | 3.612 (5) | 135 |
C13—H13···Cg3ii | 0.93 | 2.84 | 3.588 (5) | 138 |
C15—H15···Cg2iii | 0.93 | 2.89 | 3.686 (5) | 145 |
C18—H18A···Cg1iii | 0.96 | 2.95 | 3.625 (5) | 128 |
Symmetry codes: (i) −x+1/2, y+1/2, z; (ii) −x+1, y−1/2, −z−1/2; (iii) x, −y+1/2, z−1/2. |
Cg1, Cg2 and Cg3 are the centroids of the N1/C1/C6–C9, C1–C16 and C11–C16 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···Cg2i | 0.93 | 2.99 | 3.705 (5) | 135 |
C7—H7···Cg1i | 0.93 | 2.90 | 3.612 (5) | 135 |
C13—H13···Cg3ii | 0.93 | 2.84 | 3.588 (5) | 138 |
C15—H15···Cg2iii | 0.93 | 2.89 | 3.686 (5) | 145 |
C18—H18A···Cg1iii | 0.96 | 2.95 | 3.625 (5) | 128 |
Symmetry codes: (i) −x+1/2, y+1/2, z; (ii) −x+1, y−1/2, −z−1/2; (iii) x, −y+1/2, z−1/2. |
Acknowledgements
The authors are grateful to the Department of Chemistry, IIT Kanpur, Kanpur 208 016, India, for the X-ray data collection and to Musheer Ahmad for valuable discussions.
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Quinoline derivatives of Schiff bases are important building blocks of many important compounds widely used in biological applications such as antioxidative and anticancer and fluorescent probe agents in industry and in coordination chemistry (Motswainyana et al., 2013; Das et al., 2013; Song et al., 2011; Jursic et al., 2002). The present work is part of an ongoing structural study of Schiff base metal complexes (Faizi & Hussain, 2014; Faizi & Sen, 2014; Faizi et al. 2014) and we report here the structure of N1,N1-diethyl-N4-[(quinolin-2-yl)methylidene]benzene-1,4-diamine (DQMBD). There are very few examples similar to title compound and their metal complex have been reported in the literature (Patra & Goldberg 2003; Gonzalez et al., 2012). The synthesis of DQMBD by condensation of 2-quinolinecarboxaldehyde and N1,N1-diethyl-p-phenylenediamine has not previously been reported. In the title compound (Fig. 1) DQMBD has non planar structure, the dihedral angle between the quinolinyl and pphenylenediamine rings is 9.40 (4)°. In the crystal, molecules are connected by C—H···π, generating a chain extending along the a axis direction. In the crystal molecules are connected by C—H···π, giving an overall two-dimensional layered structure lying parallel to (100) is given in Fig. 2.