organic compounds
N-(3-Bromo-1,4-dioxo-1,4-dihydro-2-naphthyl)-2-chloro-N-(2-chlorobenzoyl)benzamide
aDepartment of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
*Correspondence e-mail: rbutcher99@yahoo.com
The title compound, C24H12BrCl2NO4, was synthesized from 2-amino-3-bromo-1,4-naphthoquinone and 2-chlorobenzoyl chloride. The shows that each of the chlorophenyl rings is inclined at about 60° to the naphthoquinone ring system. The two chlorophenyl rings adopt a conformation that ensures that chlorine substituents are anti so as to reduce electronic repulsion. An examination of the packing shows close O⋯Br and Cl⋯Cl contacts of 2.947 (2) and 3.346 (1) Å, respectively. In addition, the molecules are linked by weak intermolecular C—H⋯O and C—H⋯Cl interactions.
Related literature
For similar structures, see: Lien et al. (1997); Huang et al. (1998); Bakare et al. (2003); Copeland et al. (2007); Win et al. (2005); Rubin-Preminger et al. (2004). For the properties of compounds with the chloro-1,4-naphthoquinone skeleton, see: Chang et al. (1999); Ertl et al. (1999).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2007); cell CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536808039214/bq2099sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808039214/bq2099Isup2.hkl
To a solution of 2-amino-3-bromo-1,4-naphthoquinone (300 mg, 1.21 mmol) in dry THF was added NaH (72.6 mg 3.025 mmol) and the mixture was stirred for 15 minutes. 2-Chloro-benzoylchloride (0.37 ml) was added thereafter and this mixture was stirred at room temperature for 16–24 hr under argon. The solvent was removed in vacuo and the solid residue was dissolved in dichloromethane (40 ml). The resultant solution was washed with water (3 x 15 ml), saturated NaCl solution (2 x 15 ml) and dried over anhydrous magnesium sulfate. The solvent was removed in vacuo and the residue triturated in ethyl acetate to give a yellow solid (280.0 g m). This was recrystallized in ethyl acetate to furnish the title imide (214.2 mg, 34%).
All H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms with C—H distances of 0.95 Å and Uiso(H) = 1.2Ueq(C).
Data collection: CrysAlis CCD (Oxford Diffraction, 2007); cell
CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED (Oxford Diffraction, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C24H12BrCl2NO4 | F(000) = 1056 |
Mr = 529.16 | Dx = 1.660 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
a = 12.8590 (3) Å | Cell parameters from 6385 reflections |
b = 7.8126 (1) Å | θ = 4.5–34.8° |
c = 21.9574 (4) Å | µ = 2.23 mm−1 |
β = 106.272 (2)° | T = 200 K |
V = 2117.53 (7) Å3 | Needle, pale yellow |
Z = 4 | 0.46 × 0.18 × 0.15 mm |
Oxford Diffraction Gemini R diffractometer | 8407 independent reflections |
Radiation source: fine-focus sealed tube | 4388 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.041 |
Detector resolution: 10.5081 pixels mm-1 | θmax = 34.8°, θmin = 4.5° |
ϕ and ω scans | h = −19→20 |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | k = −12→12 |
Tmin = 0.945, Tmax = 1.000 | l = −34→28 |
27164 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)] = 0.047 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.123 | H-atom parameters constrained |
S = 0.92 | w = 1/[σ2(Fo2) + (0.0618P)2] where P = (Fo2 + 2Fc2)/3 |
8407 reflections | (Δ/σ)max = 0.003 |
289 parameters | Δρmax = 2.03 e Å−3 |
0 restraints | Δρmin = −0.70 e Å−3 |
C24H12BrCl2NO4 | V = 2117.53 (7) Å3 |
Mr = 529.16 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 12.8590 (3) Å | µ = 2.23 mm−1 |
b = 7.8126 (1) Å | T = 200 K |
c = 21.9574 (4) Å | 0.46 × 0.18 × 0.15 mm |
β = 106.272 (2)° |
Oxford Diffraction Gemini R diffractometer | 8407 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2007) | 4388 reflections with I > 2σ(I) |
Tmin = 0.945, Tmax = 1.000 | Rint = 0.041 |
27164 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.123 | H-atom parameters constrained |
S = 0.92 | Δρmax = 2.03 e Å−3 |
8407 reflections | Δρmin = −0.70 e Å−3 |
289 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 | ||
Br | 0.16560 (2) | 0.07777 (4) | 0.693146 (11) | 0.03453 (9) | |
Cl1A | 0.54339 (7) | 0.57382 (8) | 0.71533 (4) | 0.04354 (18) | |
Cl1B | 0.56864 (7) | −0.14656 (8) | 0.60493 (4) | 0.04445 (19) | |
O1 | −0.05313 (17) | 0.1335 (4) | 0.60398 (10) | 0.0601 (7) | |
O2 | 0.24523 (15) | 0.3427 (3) | 0.49462 (8) | 0.0406 (5) | |
O1A | 0.31064 (15) | 0.4218 (2) | 0.68149 (8) | 0.0325 (4) | |
O1B | 0.33990 (16) | −0.0028 (2) | 0.54700 (9) | 0.0389 (5) | |
N | 0.32004 (15) | 0.2100 (2) | 0.61270 (8) | 0.0207 (4) | |
C1 | 0.20724 (18) | 0.2157 (3) | 0.58269 (10) | 0.0207 (4) | |
C2 | 0.1317 (2) | 0.1653 (3) | 0.61071 (10) | 0.0251 (5) | |
C3 | 0.0139 (2) | 0.1748 (3) | 0.57732 (11) | 0.0298 (5) | |
C4 | −0.01873 (19) | 0.2343 (3) | 0.51068 (10) | 0.0239 (5) | |
C5 | −0.1271 (2) | 0.2365 (3) | 0.47668 (11) | 0.0290 (5) | |
H5A | −0.1803 | 0.1963 | 0.4957 | 0.035* | |
C6 | −0.1578 (2) | 0.2969 (3) | 0.41533 (12) | 0.0342 (6) | |
H6A | −0.2323 | 0.2996 | 0.3925 | 0.041* | |
C7 | −0.0814 (2) | 0.3536 (4) | 0.38673 (12) | 0.0367 (6) | |
H7A | −0.1037 | 0.3955 | 0.3444 | 0.044* | |
C8 | 0.0275 (2) | 0.3495 (3) | 0.41937 (11) | 0.0333 (6) | |
H8A | 0.0800 | 0.3873 | 0.3994 | 0.040* | |
C9 | 0.0601 (2) | 0.2897 (3) | 0.48187 (10) | 0.0237 (5) | |
C10 | 0.1758 (2) | 0.2874 (3) | 0.51699 (10) | 0.0252 (5) | |
C1A | 0.36326 (19) | 0.3069 (3) | 0.66818 (10) | 0.0211 (4) | |
C2A | 0.47008 (19) | 0.2488 (3) | 0.71062 (10) | 0.0235 (5) | |
C3A | 0.5541 (2) | 0.3614 (3) | 0.73579 (11) | 0.0292 (5) | |
C4A | 0.6516 (2) | 0.3043 (4) | 0.77548 (12) | 0.0405 (7) | |
H4AA | 0.7095 | 0.3823 | 0.7914 | 0.049* | |
C5A | 0.6642 (3) | 0.1328 (4) | 0.79186 (13) | 0.0454 (7) | |
H5AA | 0.7309 | 0.0933 | 0.8192 | 0.054* | |
C6A | 0.5810 (3) | 0.0197 (4) | 0.76886 (12) | 0.0404 (7) | |
H6AA | 0.5896 | −0.0974 | 0.7809 | 0.048* | |
C7A | 0.4848 (2) | 0.0758 (3) | 0.72825 (11) | 0.0298 (5) | |
H7AA | 0.4277 | −0.0035 | 0.7120 | 0.036* | |
C1B | 0.38232 (19) | 0.1143 (3) | 0.57957 (11) | 0.0235 (5) | |
C2B | 0.49383 (19) | 0.1791 (3) | 0.58353 (10) | 0.0228 (5) | |
C3B | 0.5818 (2) | 0.0694 (3) | 0.59230 (11) | 0.0260 (5) | |
C4B | 0.6829 (2) | 0.1307 (3) | 0.59320 (12) | 0.0319 (6) | |
H4BA | 0.7432 | 0.0552 | 0.6007 | 0.038* | |
C5B | 0.6956 (2) | 0.3040 (3) | 0.58300 (12) | 0.0323 (6) | |
H5BA | 0.7648 | 0.3470 | 0.5832 | 0.039* | |
C6B | 0.6095 (2) | 0.4132 (3) | 0.57274 (12) | 0.0307 (5) | |
H6BA | 0.6186 | 0.5308 | 0.5646 | 0.037* | |
C7B | 0.5094 (2) | 0.3529 (3) | 0.57424 (10) | 0.0252 (5) | |
H7BA | 0.4505 | 0.4304 | 0.5689 | 0.030* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br | 0.02744 (14) | 0.05392 (17) | 0.02277 (12) | −0.00532 (12) | 0.00791 (9) | 0.01052 (11) |
Cl1A | 0.0473 (5) | 0.0356 (3) | 0.0481 (4) | −0.0096 (3) | 0.0140 (3) | −0.0032 (3) |
Cl1B | 0.0482 (5) | 0.0279 (3) | 0.0601 (5) | 0.0041 (3) | 0.0198 (4) | 0.0029 (3) |
O1 | 0.0209 (11) | 0.120 (2) | 0.0407 (12) | −0.0055 (12) | 0.0117 (9) | 0.0258 (13) |
O2 | 0.0219 (10) | 0.0688 (12) | 0.0316 (10) | −0.0072 (9) | 0.0084 (8) | 0.0174 (9) |
O1A | 0.0269 (10) | 0.0382 (9) | 0.0299 (9) | 0.0062 (8) | 0.0040 (7) | −0.0080 (8) |
O1B | 0.0308 (11) | 0.0415 (10) | 0.0461 (11) | −0.0133 (9) | 0.0134 (8) | −0.0235 (9) |
N | 0.0144 (9) | 0.0301 (9) | 0.0175 (8) | −0.0022 (8) | 0.0044 (7) | −0.0041 (7) |
C1 | 0.0158 (11) | 0.0288 (11) | 0.0170 (10) | −0.0020 (9) | 0.0040 (8) | −0.0006 (9) |
C2 | 0.0196 (12) | 0.0373 (13) | 0.0190 (10) | −0.0022 (10) | 0.0061 (9) | 0.0007 (9) |
C3 | 0.0178 (12) | 0.0454 (14) | 0.0279 (12) | −0.0019 (11) | 0.0090 (10) | 0.0050 (11) |
C4 | 0.0178 (12) | 0.0308 (12) | 0.0222 (11) | −0.0022 (10) | 0.0043 (8) | −0.0022 (9) |
C5 | 0.0175 (12) | 0.0344 (13) | 0.0341 (13) | −0.0033 (10) | 0.0056 (10) | −0.0015 (11) |
C6 | 0.0199 (13) | 0.0412 (14) | 0.0349 (13) | 0.0011 (11) | −0.0033 (10) | −0.0042 (12) |
C7 | 0.0324 (16) | 0.0460 (15) | 0.0258 (12) | 0.0015 (13) | −0.0016 (11) | 0.0050 (11) |
C8 | 0.0289 (15) | 0.0462 (14) | 0.0242 (12) | −0.0028 (12) | 0.0065 (10) | 0.0057 (11) |
C9 | 0.0216 (12) | 0.0282 (11) | 0.0195 (10) | −0.0017 (10) | 0.0028 (8) | 0.0004 (9) |
C10 | 0.0209 (12) | 0.0329 (12) | 0.0217 (10) | −0.0036 (10) | 0.0062 (9) | 0.0003 (9) |
C1A | 0.0212 (12) | 0.0238 (10) | 0.0179 (10) | −0.0029 (9) | 0.0047 (8) | 0.0008 (8) |
C2A | 0.0197 (12) | 0.0345 (12) | 0.0163 (9) | −0.0008 (10) | 0.0051 (8) | −0.0021 (9) |
C3A | 0.0252 (13) | 0.0389 (13) | 0.0235 (11) | −0.0071 (11) | 0.0068 (10) | −0.0034 (10) |
C4A | 0.0286 (15) | 0.0624 (18) | 0.0266 (13) | −0.0115 (14) | 0.0009 (11) | −0.0042 (13) |
C5A | 0.0344 (17) | 0.0663 (19) | 0.0318 (14) | 0.0121 (15) | 0.0031 (12) | 0.0050 (14) |
C6A | 0.049 (2) | 0.0436 (15) | 0.0270 (13) | 0.0128 (14) | 0.0079 (12) | 0.0035 (12) |
C7A | 0.0329 (14) | 0.0333 (12) | 0.0222 (11) | 0.0048 (11) | 0.0058 (9) | −0.0010 (10) |
C1B | 0.0189 (12) | 0.0303 (12) | 0.0221 (10) | 0.0003 (9) | 0.0070 (9) | −0.0014 (9) |
C2B | 0.0200 (12) | 0.0318 (12) | 0.0165 (9) | 0.0000 (10) | 0.0051 (8) | −0.0029 (9) |
C3B | 0.0265 (13) | 0.0287 (11) | 0.0251 (11) | 0.0048 (11) | 0.0111 (9) | 0.0001 (10) |
C4B | 0.0249 (14) | 0.0430 (14) | 0.0290 (12) | 0.0044 (11) | 0.0094 (10) | 0.0000 (11) |
C5B | 0.0241 (14) | 0.0441 (14) | 0.0313 (13) | −0.0098 (12) | 0.0119 (10) | −0.0066 (11) |
C6B | 0.0326 (14) | 0.0322 (12) | 0.0309 (12) | −0.0063 (12) | 0.0148 (10) | −0.0015 (11) |
C7B | 0.0201 (12) | 0.0349 (12) | 0.0221 (11) | −0.0026 (10) | 0.0083 (9) | −0.0004 (10) |
Br—C2 | 1.869 (2) | C1A—C2A | 1.498 (3) |
Cl1A—C3A | 1.715 (3) | C2A—C3A | 1.383 (3) |
Cl1B—C3B | 1.726 (2) | C2A—C7A | 1.404 (3) |
O1—C3 | 1.214 (3) | C3A—C4A | 1.384 (4) |
O2—C10 | 1.213 (3) | C4A—C5A | 1.385 (4) |
O1A—C1A | 1.209 (3) | C4A—H4AA | 0.9500 |
O1B—C1B | 1.195 (3) | C5A—C6A | 1.370 (5) |
N—C1A | 1.410 (3) | C5A—H5AA | 0.9500 |
N—C1 | 1.416 (3) | C6A—C7A | 1.378 (4) |
N—C1B | 1.434 (3) | C6A—H6AA | 0.9500 |
C1—C2 | 1.346 (3) | C7A—H7AA | 0.9500 |
C1—C10 | 1.494 (3) | C1B—C2B | 1.500 (3) |
C2—C3 | 1.489 (3) | C2B—C3B | 1.389 (3) |
C3—C4 | 1.479 (3) | C2B—C7B | 1.396 (3) |
C4—C5 | 1.384 (3) | C3B—C4B | 1.381 (4) |
C4—C9 | 1.405 (3) | C4B—C5B | 1.390 (4) |
C5—C6 | 1.377 (3) | C4B—H4BA | 0.9500 |
C5—H5A | 0.9500 | C5B—C6B | 1.365 (4) |
C6—C7 | 1.378 (4) | C5B—H5BA | 0.9500 |
C6—H6A | 0.9500 | C6B—C7B | 1.380 (4) |
C7—C8 | 1.383 (4) | C6B—H6BA | 0.9500 |
C7—H7A | 0.9500 | C7B—H7BA | 0.9500 |
C8—C9 | 1.398 (3) | H6AA—Cl1Ai | 2.923 |
C8—H8A | 0.9500 | H6BA—Cl1Bii | 2.805 |
C9—C10 | 1.471 (3) | ||
C1A—N—C1 | 119.32 (18) | C7A—C2A—C1A | 119.5 (2) |
C1A—N—C1B | 125.28 (19) | C2A—C3A—C4A | 121.0 (3) |
C1—N—C1B | 115.17 (17) | C2A—C3A—Cl1A | 120.9 (2) |
C2—C1—N | 123.7 (2) | C4A—C3A—Cl1A | 118.0 (2) |
C2—C1—C10 | 121.1 (2) | C3A—C4A—C5A | 119.6 (3) |
N—C1—C10 | 115.22 (18) | C3A—C4A—H4AA | 120.2 |
C1—C2—C3 | 121.7 (2) | C5A—C4A—H4AA | 120.2 |
C1—C2—Br | 123.22 (18) | C6A—C5A—C4A | 120.4 (3) |
C3—C2—Br | 115.11 (16) | C6A—C5A—H5AA | 119.8 |
O1—C3—C4 | 121.2 (2) | C4A—C5A—H5AA | 119.8 |
O1—C3—C2 | 120.8 (2) | C5A—C6A—C7A | 120.0 (3) |
C4—C3—C2 | 118.1 (2) | C5A—C6A—H6AA | 120.0 |
C5—C4—C9 | 119.8 (2) | C7A—C6A—H6AA | 120.0 |
C5—C4—C3 | 120.1 (2) | C6A—C7A—C2A | 120.8 (3) |
C9—C4—C3 | 120.1 (2) | C6A—C7A—H7AA | 119.6 |
C6—C5—C4 | 120.1 (2) | C2A—C7A—H7AA | 119.6 |
C6—C5—H5A | 120.0 | O1B—C1B—N | 118.5 (2) |
C4—C5—H5A | 120.0 | O1B—C1B—C2B | 124.2 (2) |
C5—C6—C7 | 120.7 (2) | N—C1B—C2B | 117.08 (19) |
C5—C6—H6A | 119.7 | C3B—C2B—C7B | 118.4 (2) |
C7—C6—H6A | 119.7 | C3B—C2B—C1B | 121.8 (2) |
C6—C7—C8 | 120.2 (2) | C7B—C2B—C1B | 119.6 (2) |
C6—C7—H7A | 119.9 | C4B—C3B—C2B | 121.0 (2) |
C8—C7—H7A | 119.9 | C4B—C3B—Cl1B | 118.11 (19) |
C7—C8—C9 | 119.9 (2) | C2B—C3B—Cl1B | 120.86 (19) |
C7—C8—H8A | 120.1 | C3B—C4B—C5B | 119.2 (2) |
C9—C8—H8A | 120.1 | C3B—C4B—H4BA | 120.4 |
C8—C9—C4 | 119.3 (2) | C5B—C4B—H4BA | 120.4 |
C8—C9—C10 | 120.0 (2) | C6B—C5B—C4B | 120.6 (2) |
C4—C9—C10 | 120.7 (2) | C6B—C5B—H5BA | 119.7 |
O2—C10—C9 | 122.3 (2) | C4B—C5B—H5BA | 119.7 |
O2—C10—C1 | 119.6 (2) | C5B—C6B—C7B | 120.1 (2) |
C9—C10—C1 | 118.1 (2) | C5B—C6B—H6BA | 119.9 |
O1A—C1A—N | 119.8 (2) | C7B—C6B—H6BA | 119.9 |
O1A—C1A—C2A | 123.5 (2) | C6B—C7B—C2B | 120.5 (2) |
N—C1A—C2A | 116.47 (19) | C6B—C7B—H7BA | 119.7 |
C3A—C2A—C7A | 118.2 (2) | C2B—C7B—H7BA | 119.7 |
C3A—C2A—C1A | 122.3 (2) | ||
C1A—N—C1—C2 | −61.2 (3) | C1—N—C1A—C2A | 157.69 (19) |
C1B—N—C1—C2 | 124.0 (2) | C1B—N—C1A—C2A | −28.1 (3) |
C1A—N—C1—C10 | 117.1 (2) | O1A—C1A—C2A—C3A | −51.8 (3) |
C1B—N—C1—C10 | −57.7 (3) | N—C1A—C2A—C3A | 133.8 (2) |
N—C1—C2—C3 | 179.6 (2) | O1A—C1A—C2A—C7A | 125.2 (2) |
C10—C1—C2—C3 | 1.4 (4) | N—C1A—C2A—C7A | −49.3 (3) |
N—C1—C2—Br | −0.8 (3) | C7A—C2A—C3A—C4A | 2.3 (4) |
C10—C1—C2—Br | −179.02 (17) | C1A—C2A—C3A—C4A | 179.3 (2) |
C1—C2—C3—O1 | −177.8 (3) | C7A—C2A—C3A—Cl1A | 178.70 (18) |
Br—C2—C3—O1 | 2.5 (4) | C1A—C2A—C3A—Cl1A | −4.3 (3) |
C1—C2—C3—C4 | 2.8 (4) | C2A—C3A—C4A—C5A | −2.0 (4) |
Br—C2—C3—C4 | −176.85 (17) | Cl1A—C3A—C4A—C5A | −178.5 (2) |
O1—C3—C4—C5 | −2.9 (4) | C3A—C4A—C5A—C6A | 0.2 (4) |
C2—C3—C4—C5 | 176.5 (2) | C4A—C5A—C6A—C7A | 1.2 (4) |
O1—C3—C4—C9 | 176.8 (3) | C5A—C6A—C7A—C2A | −0.9 (4) |
C2—C3—C4—C9 | −3.9 (4) | C3A—C2A—C7A—C6A | −0.9 (4) |
C9—C4—C5—C6 | −1.7 (4) | C1A—C2A—C7A—C6A | −177.9 (2) |
C3—C4—C5—C6 | 177.9 (2) | C1A—N—C1B—O1B | 156.2 (2) |
C4—C5—C6—C7 | 0.9 (4) | C1—N—C1B—O1B | −29.3 (3) |
C5—C6—C7—C8 | 0.3 (4) | C1A—N—C1B—C2B | −29.4 (3) |
C6—C7—C8—C9 | −0.8 (4) | C1—N—C1B—C2B | 145.08 (19) |
C7—C8—C9—C4 | 0.0 (4) | O1B—C1B—C2B—C3B | −48.2 (3) |
C7—C8—C9—C10 | −179.2 (2) | N—C1B—C2B—C3B | 137.8 (2) |
C5—C4—C9—C8 | 1.2 (4) | O1B—C1B—C2B—C7B | 127.7 (3) |
C3—C4—C9—C8 | −178.4 (2) | N—C1B—C2B—C7B | −46.3 (3) |
C5—C4—C9—C10 | −179.6 (2) | C7B—C2B—C3B—C4B | 1.4 (3) |
C3—C4—C9—C10 | 0.8 (3) | C1B—C2B—C3B—C4B | 177.3 (2) |
C8—C9—C10—O2 | 3.2 (4) | C7B—C2B—C3B—Cl1B | 179.26 (17) |
C4—C9—C10—O2 | −176.0 (2) | C1B—C2B—C3B—Cl1B | −4.8 (3) |
C8—C9—C10—C1 | −177.5 (2) | C2B—C3B—C4B—C5B | −2.2 (3) |
C4—C9—C10—C1 | 3.3 (3) | Cl1B—C3B—C4B—C5B | 179.85 (19) |
C2—C1—C10—O2 | 174.9 (2) | C3B—C4B—C5B—C6B | 0.6 (4) |
N—C1—C10—O2 | −3.4 (3) | C4B—C5B—C6B—C7B | 1.9 (4) |
C2—C1—C10—C9 | −4.4 (3) | C5B—C6B—C7B—C2B | −2.7 (4) |
N—C1—C10—C9 | 177.21 (19) | C3B—C2B—C7B—C6B | 1.1 (3) |
C1—N—C1A—O1A | −17.0 (3) | C1B—C2B—C7B—C6B | −174.9 (2) |
C1B—N—C1A—O1A | 157.3 (2) |
Symmetry codes: (i) x, y−1, z; (ii) x, y+1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···O1Biii | 0.95 | 2.51 | 3.209 (3) | 131 |
C4B—H4BA···O1iv | 0.95 | 2.67 | 3.335 (3) | 128 |
C6B—H6BA···O2v | 0.95 | 2.65 | 3.296 (3) | 126 |
Symmetry codes: (iii) −x, −y, −z+1; (iv) x+1, y, z; (v) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C24H12BrCl2NO4 |
Mr | 529.16 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 200 |
a, b, c (Å) | 12.8590 (3), 7.8126 (1), 21.9574 (4) |
β (°) | 106.272 (2) |
V (Å3) | 2117.53 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.23 |
Crystal size (mm) | 0.46 × 0.18 × 0.15 |
Data collection | |
Diffractometer | Oxford Diffraction Gemini R diffractometer |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2007) |
Tmin, Tmax | 0.945, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 27164, 8407, 4388 |
Rint | 0.041 |
(sin θ/λ)max (Å−1) | 0.804 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.047, 0.123, 0.92 |
No. of reflections | 8407 |
No. of parameters | 289 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 2.03, −0.70 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2007), CrysAlis RED (Oxford Diffraction, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···O1Bi | 0.95 | 2.51 | 3.209 (3) | 130.5 |
C4B—H4BA···O1ii | 0.95 | 2.67 | 3.335 (3) | 127.5 |
C6B—H6BA···O2iii | 0.95 | 2.65 | 3.296 (3) | 126.0 |
Symmetry codes: (i) −x, −y, −z+1; (ii) x+1, y, z; (iii) −x+1, −y+1, −z+1. |
Acknowledgements
RJB acknowledges the NSF–MRI program (grant No. CHE-0619278) for funds to purchase the X-ray diffractometer.
References
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Certain compounds with the chloro-1,4-naphthoquinone skeleton were reported to exhibit antineoplastic property and some have inhibitory effects on human cytomegalovirus (HCMV) protease (Chang et al., 1999; Ertl et al., 1999). The amido and imido derivatives of 3-chloro-1,4-naphthoquinone have been reported to exhibit appreciable anti-inflammatory, antiplatelet, antiallergic and anticancer activities (Lien et al., 1997; Huang et al., 1998; Bakare et al., 2003; Copeland et al.,2007) We have developed some imido-substituted 2-chloro-1,4-naphthoquinones with cytotoxic activities on some prostate cancer cell lines. In continuation of our work, the title compound (I) was synthesized as a potential anticancer agent.
Each of the phenyl groups is inclined at about 60° to the naphthoquinone ring of the titled compound C24H12BrCl2NO4. The two chlorophenyl rings adopt a conformation that ensures that chlorine substituents are anti to each other so as to reduce electronic repulsion. An examination of the packing shows close contacts between O1A and Br at (1/2 - x, 1/2 + y, 3/2 - z) (2.947 (2) Å) and Cl1A and Cl1B at (x, 1 + y, z) (3.346 (1) Å). The explanation of these close contacts lies in a balance between the torsion angles subtended at the N which balances short intramolecular contacts against short intermolecular contacts and comes up with the best compromise.