organic compounds
2,2-Bis(4-butoxyphenyl)-1,1,1-trichloroethane
aScience and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia
*Correspondence e-mail: g.smith@qut.edu.au
In the structure of the title compound, C22H27Cl3O2, which is the 4-butoxyphenyl analogue of the insecticidally active 4-methoxyphenyl compound methoxychlor, the dihedral angle between the two benzene rings is 79.61 (11)°. Present also in the structure is an intramolecular aromatic C—H⋯Cl interaction.
Related literature
For background to the mode of action of DDT analogues, see: Läuger et al. (1944); Kennard & Smith (1980). For the structures of the insecticides DDT and methoxychlor, see: DeLacy & Kennard (1972); Smith et al. (1976).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Agilent, 2012); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supporting information
https://doi.org/10.1107/S1600536812032680/bt5980sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812032680/bt5980Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812032680/bt5980Isup3.cml
The title compound was obtained as an analytical reference standard from the US Public Health Service. Colourless crystal blocks suitable for X-ray analysis were obtained by room temperature evaporation of a solution in ethanol.
Hydrogen atoms were included in the
at calculated positions [C—H = 0.93–0.98 Å, with Uiso(H) = 1.2Ueq(C)(aromatic, methylene and methine) or 1.5Ueq(C)(methyl), using a riding-model approximation.The title compound, C22H27Cl302, is the 4-butoxyphenyl analogue of the insecticide DDT [1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane] as well as the 4-methoxyphenyl analogue, also an insecticide (methoxychlor). Criteria for insecticidal activity of the DDT analogues have been described (Läuger et al., 1944; Kennard & Smith, 1980). The crystal structures of both DDT (DeLacy & Kennard, 1972) and methoxychlor (Smith et al., 1976) have been reported but there are no other structures of 4-alkoxyphenyl DDT derivatives in the crystallographic literature.
In the structure of the title compound (Fig. 1), the dihedral angle between the two phenyl planes is 79.61 (11)° which compares with 77.7° in the structure of methoxychlor (Smith et al., 1976) and 64.7° in DDT (DeLacy & Kennard, 1972). The conformations of the two butoxy side chains relative to their phenyl rings (A and B) are essentially identical [comparative torsion angles C3—C4—O4—C11, C4—O4—C11–C21, O4—C11—C21—C31 and C11—C21—C31—C41 are -173.0 (2), 167.44 (19), -62.3 (3), -177.8 (2)° (A) and -170.0 (2), 168.5 (2), -63.9 (3), -171.1 (3)° (B), respectively]. The B ring conformation is stabilized by an intramolecular aromatic C2B—H···Cl3 interaction (Table 1). Present in the crystal packing is a relatively short intermolecular Cl···Cl contact [3.4302 (9) Å] but no other significant interactions are found (Fig. 2).
For background to the mode of action of DDT analogues, see: Läuger et al. (1944); Kennard & Smith (1980). For the structures of the insecticides DDT and methoxychlor, see: DeLacy & Kennard (1972); Smith et al. (1976).
Data collection: CrysAlis PRO (Agilent, 2012); cell
CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis PRO (Agilent, 2012); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON (Spek, 2009).C22H27Cl3O2 | F(000) = 904 |
Mr = 429.79 | Dx = 1.321 Mg m−3 |
Monoclinic, P21/c | Melting point = 321–323 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 5.7871 (1) Å | Cell parameters from 4362 reflections |
b = 18.3112 (5) Å | θ = 3.2–28.8° |
c = 20.3988 (4) Å | µ = 0.44 mm−1 |
β = 91.160 (2)° | T = 200 K |
V = 2161.19 (8) Å3 | Block, colourless |
Z = 4 | 0.15 × 0.15 × 0.10 mm |
Oxford Gemini-S CCD area-detector diffractometer | 4245 independent reflections |
Radiation source: Enhance (Mo) X-ray source | 3486 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
Detector resolution: 16.077 pixels mm-1 | θmax = 26.0°, θmin = 3.2° |
ω scans | h = −7→7 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | k = −22→22 |
Tmin = 0.951, Tmax = 0.981 | l = −23→25 |
14149 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) = 0.110 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0482P)2 + 0.8549P] where P = (Fo2 + 2Fc2)/3 |
4245 reflections | (Δ/σ)max < 0.001 |
244 parameters | Δρmax = 0.35 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
C22H27Cl3O2 | V = 2161.19 (8) Å3 |
Mr = 429.79 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 5.7871 (1) Å | µ = 0.44 mm−1 |
b = 18.3112 (5) Å | T = 200 K |
c = 20.3988 (4) Å | 0.15 × 0.15 × 0.10 mm |
β = 91.160 (2)° |
Oxford Gemini-S CCD area-detector diffractometer | 4245 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | 3486 reflections with I > 2σ(I) |
Tmin = 0.951, Tmax = 0.981 | Rint = 0.035 |
14149 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.110 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.35 e Å−3 |
4245 reflections | Δρmin = −0.18 e Å−3 |
244 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
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 | ||
Cl1 | 0.48915 (12) | 0.34506 (4) | 0.74543 (3) | 0.0482 (2) | |
Cl2 | 0.56526 (11) | 0.19339 (4) | 0.77193 (3) | 0.0427 (2) | |
Cl3 | 0.11570 (10) | 0.24145 (4) | 0.72992 (3) | 0.0414 (2) | |
O4A | 0.2523 (3) | −0.03999 (8) | 0.55790 (8) | 0.0337 (5) | |
O4B | 0.2658 (3) | 0.45228 (9) | 0.44987 (8) | 0.0366 (5) | |
C1 | 0.4168 (4) | 0.25582 (13) | 0.71850 (11) | 0.0314 (7) | |
C1A | 0.4329 (4) | 0.16819 (12) | 0.62234 (11) | 0.0270 (6) | |
C1B | 0.4276 (4) | 0.30454 (11) | 0.59910 (11) | 0.0269 (6) | |
C2 | 0.4927 (4) | 0.24406 (12) | 0.64762 (11) | 0.0284 (7) | |
C2A | 0.2207 (4) | 0.15300 (12) | 0.59082 (11) | 0.0288 (7) | |
C2B | 0.2214 (4) | 0.34358 (12) | 0.59692 (11) | 0.0320 (7) | |
C3A | 0.1674 (4) | 0.08342 (12) | 0.56947 (11) | 0.0285 (7) | |
C3B | 0.1743 (4) | 0.39339 (12) | 0.54757 (11) | 0.0311 (7) | |
C4A | 0.3241 (4) | 0.02695 (12) | 0.57889 (11) | 0.0279 (7) | |
C4B | 0.3318 (4) | 0.40494 (11) | 0.49815 (11) | 0.0286 (7) | |
C5A | 0.5381 (4) | 0.04132 (13) | 0.60786 (12) | 0.0327 (7) | |
C5B | 0.5411 (4) | 0.36850 (12) | 0.50109 (11) | 0.0332 (7) | |
C6A | 0.5886 (4) | 0.11156 (12) | 0.62884 (12) | 0.0325 (7) | |
C6B | 0.5860 (4) | 0.31939 (12) | 0.55096 (11) | 0.0310 (7) | |
C11A | 0.3962 (4) | −0.10180 (12) | 0.57314 (12) | 0.0345 (7) | |
C11B | 0.4096 (5) | 0.45527 (14) | 0.39336 (12) | 0.0404 (8) | |
C21A | 0.2577 (4) | −0.16968 (12) | 0.55871 (12) | 0.0353 (8) | |
C21B | 0.2872 (5) | 0.49745 (15) | 0.34070 (13) | 0.0474 (9) | |
C31A | 0.0447 (4) | −0.17793 (14) | 0.59953 (13) | 0.0411 (8) | |
C31B | 0.0676 (5) | 0.46320 (17) | 0.31572 (15) | 0.0584 (11) | |
C41A | −0.0850 (5) | −0.24830 (15) | 0.58550 (15) | 0.0555 (10) | |
C41B | −0.0314 (7) | 0.5020 (2) | 0.25494 (19) | 0.0901 (16) | |
H2 | 0.66190 | 0.24500 | 0.65010 | 0.0340* | |
H2A | 0.11420 | 0.19040 | 0.58420 | 0.0340* | |
H2B | 0.11320 | 0.33600 | 0.62930 | 0.0380* | |
H3A | 0.02580 | 0.07440 | 0.54870 | 0.0340* | |
H3B | 0.03620 | 0.41940 | 0.54740 | 0.0370* | |
H5A | 0.64650 | 0.00420 | 0.61310 | 0.0390* | |
H5B | 0.65140 | 0.37710 | 0.46950 | 0.0400* | |
H6A | 0.73280 | 0.12090 | 0.64800 | 0.0390* | |
H6B | 0.72770 | 0.29540 | 0.55230 | 0.0370* | |
H11A | 0.44370 | −0.10070 | 0.61900 | 0.0410* | |
H11B | 0.44190 | 0.40620 | 0.37810 | 0.0480* | |
H12A | 0.53360 | −0.10090 | 0.54670 | 0.0410* | |
H12B | 0.55530 | 0.47870 | 0.40470 | 0.0480* | |
H21A | 0.35610 | −0.21190 | 0.56590 | 0.0420* | |
H21B | 0.39060 | 0.50350 | 0.30430 | 0.0570* | |
H22A | 0.21120 | −0.16930 | 0.51280 | 0.0420* | |
H22B | 0.25210 | 0.54570 | 0.35740 | 0.0570* | |
H31A | −0.05760 | −0.13690 | 0.59100 | 0.0490* | |
H31B | −0.04590 | 0.46440 | 0.35010 | 0.0700* | |
H32A | 0.08970 | −0.17660 | 0.64560 | 0.0490* | |
H32B | 0.09680 | 0.41240 | 0.30510 | 0.0700* | |
H41A | −0.21810 | −0.25090 | 0.61270 | 0.0830* | |
H41B | −0.17280 | 0.47860 | 0.24120 | 0.1350* | |
H42A | 0.01440 | −0.28920 | 0.59470 | 0.0830* | |
H42B | 0.07790 | 0.49940 | 0.22020 | 0.1350* | |
H43A | −0.13350 | −0.24940 | 0.54020 | 0.0830* | |
H43B | −0.06130 | 0.55220 | 0.26520 | 0.1350* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0668 (4) | 0.0431 (4) | 0.0344 (3) | −0.0102 (3) | −0.0077 (3) | −0.0077 (3) |
Cl2 | 0.0421 (3) | 0.0535 (4) | 0.0324 (3) | −0.0020 (3) | −0.0047 (3) | 0.0116 (3) |
Cl3 | 0.0317 (3) | 0.0603 (4) | 0.0324 (3) | −0.0021 (3) | 0.0060 (2) | 0.0022 (3) |
O4A | 0.0360 (9) | 0.0260 (8) | 0.0385 (9) | 0.0029 (7) | −0.0114 (7) | 0.0006 (7) |
O4B | 0.0472 (10) | 0.0334 (9) | 0.0294 (9) | 0.0045 (7) | 0.0049 (8) | 0.0043 (7) |
C1 | 0.0288 (11) | 0.0377 (13) | 0.0276 (12) | −0.0036 (10) | −0.0033 (10) | 0.0003 (10) |
C1A | 0.0239 (11) | 0.0311 (11) | 0.0262 (11) | −0.0030 (9) | 0.0027 (9) | 0.0033 (9) |
C1B | 0.0284 (11) | 0.0252 (11) | 0.0270 (11) | −0.0071 (9) | −0.0008 (9) | −0.0051 (9) |
C2 | 0.0239 (11) | 0.0325 (12) | 0.0287 (11) | −0.0032 (9) | 0.0003 (9) | 0.0013 (10) |
C2A | 0.0265 (11) | 0.0299 (12) | 0.0298 (12) | 0.0034 (9) | −0.0025 (9) | 0.0040 (10) |
C2B | 0.0288 (12) | 0.0381 (13) | 0.0292 (12) | −0.0021 (10) | 0.0063 (10) | 0.0004 (10) |
C3A | 0.0242 (11) | 0.0327 (12) | 0.0284 (12) | −0.0009 (9) | −0.0049 (9) | 0.0017 (10) |
C3B | 0.0286 (11) | 0.0322 (12) | 0.0327 (12) | 0.0016 (9) | 0.0030 (10) | −0.0035 (10) |
C4A | 0.0306 (12) | 0.0280 (11) | 0.0252 (11) | −0.0004 (9) | 0.0002 (9) | 0.0020 (9) |
C4B | 0.0362 (12) | 0.0229 (11) | 0.0267 (11) | −0.0048 (9) | −0.0011 (10) | −0.0033 (9) |
C5A | 0.0258 (11) | 0.0342 (13) | 0.0378 (13) | 0.0036 (10) | −0.0035 (10) | 0.0041 (10) |
C5B | 0.0355 (12) | 0.0340 (12) | 0.0305 (12) | −0.0028 (10) | 0.0089 (10) | −0.0012 (10) |
C6A | 0.0223 (11) | 0.0383 (13) | 0.0369 (13) | −0.0027 (9) | −0.0026 (10) | 0.0031 (11) |
C6B | 0.0292 (12) | 0.0312 (12) | 0.0326 (12) | 0.0003 (9) | 0.0022 (10) | −0.0030 (10) |
C11A | 0.0340 (12) | 0.0343 (13) | 0.0352 (13) | 0.0057 (10) | −0.0023 (10) | 0.0053 (10) |
C11B | 0.0507 (15) | 0.0379 (13) | 0.0329 (13) | −0.0036 (12) | 0.0093 (12) | −0.0008 (11) |
C21A | 0.0439 (14) | 0.0260 (12) | 0.0359 (13) | 0.0054 (10) | −0.0034 (11) | 0.0011 (10) |
C21B | 0.0691 (19) | 0.0395 (14) | 0.0340 (14) | 0.0006 (13) | 0.0078 (13) | 0.0041 (12) |
C31A | 0.0454 (15) | 0.0387 (14) | 0.0389 (14) | −0.0053 (11) | −0.0031 (12) | −0.0008 (11) |
C31B | 0.064 (2) | 0.0591 (19) | 0.0518 (18) | 0.0070 (15) | −0.0039 (15) | −0.0013 (15) |
C41A | 0.0625 (18) | 0.0533 (17) | 0.0504 (17) | −0.0198 (14) | −0.0050 (15) | 0.0034 (14) |
C41B | 0.105 (3) | 0.098 (3) | 0.066 (2) | 0.027 (2) | −0.031 (2) | −0.012 (2) |
Cl1—C1 | 1.771 (2) | C2—H2 | 0.9800 |
Cl2—C1 | 1.787 (2) | C2A—H2A | 0.9300 |
Cl3—C1 | 1.782 (2) | C2B—H2B | 0.9300 |
O4A—C4A | 1.361 (3) | C3A—H3A | 0.9300 |
O4A—C11A | 1.436 (3) | C3B—H3B | 0.9300 |
O4B—C4B | 1.361 (3) | C5A—H5A | 0.9300 |
O4B—C11B | 1.436 (3) | C5B—H5B | 0.9300 |
C1—C2 | 1.535 (3) | C6A—H6A | 0.9300 |
C1A—C2 | 1.519 (3) | C6B—H6B | 0.9300 |
C1A—C2A | 1.402 (3) | C11A—H11A | 0.9700 |
C1A—C6A | 1.378 (3) | C11A—H12A | 0.9700 |
C1B—C2 | 1.527 (3) | C11B—H11B | 0.9700 |
C1B—C2B | 1.391 (3) | C11B—H12B | 0.9700 |
C1B—C6B | 1.384 (3) | C21A—H21A | 0.9700 |
C2A—C3A | 1.379 (3) | C21A—H22A | 0.9700 |
C2B—C3B | 1.382 (3) | C21B—H21B | 0.9700 |
C3A—C4A | 1.386 (3) | C21B—H22B | 0.9700 |
C3B—C4B | 1.389 (3) | C31A—H31A | 0.9700 |
C4A—C5A | 1.387 (3) | C31A—H32A | 0.9700 |
C4B—C5B | 1.383 (3) | C31B—H31B | 0.9700 |
C5A—C6A | 1.385 (3) | C31B—H32B | 0.9700 |
C5B—C6B | 1.379 (3) | C41A—H41A | 0.9600 |
C11A—C21A | 1.505 (3) | C41A—H42A | 0.9600 |
C11B—C21B | 1.490 (4) | C41A—H43A | 0.9600 |
C21A—C31A | 1.509 (3) | C41B—H41B | 0.9600 |
C21B—C31B | 1.497 (4) | C41B—H42B | 0.9600 |
C31A—C41A | 1.516 (4) | C41B—H43B | 0.9600 |
C31B—C41B | 1.530 (5) | ||
C4A—O4A—C11A | 118.04 (18) | C6A—C5A—H5A | 120.00 |
C4B—O4B—C11B | 116.51 (19) | C4B—C5B—H5B | 120.00 |
Cl1—C1—Cl2 | 107.05 (12) | C6B—C5B—H5B | 120.00 |
Cl1—C1—Cl3 | 108.74 (13) | C1A—C6A—H6A | 119.00 |
Cl1—C1—C2 | 110.56 (16) | C5A—C6A—H6A | 119.00 |
Cl2—C1—Cl3 | 106.56 (12) | C1B—C6B—H6B | 119.00 |
Cl2—C1—C2 | 109.97 (16) | C5B—C6B—H6B | 119.00 |
Cl3—C1—C2 | 113.68 (16) | O4A—C11A—H11A | 110.00 |
C2—C1A—C2A | 121.9 (2) | O4A—C11A—H12A | 110.00 |
C2—C1A—C6A | 120.8 (2) | C21A—C11A—H11A | 110.00 |
C2A—C1A—C6A | 117.4 (2) | C21A—C11A—H12A | 110.00 |
C2—C1B—C2B | 126.4 (2) | H11A—C11A—H12A | 108.00 |
C2—C1B—C6B | 116.4 (2) | O4B—C11B—H11B | 110.00 |
C2B—C1B—C6B | 117.2 (2) | O4B—C11B—H12B | 110.00 |
C1—C2—C1A | 112.36 (19) | C21B—C11B—H11B | 110.00 |
C1—C2—C1B | 115.93 (19) | C21B—C11B—H12B | 110.00 |
C1A—C2—C1B | 113.05 (18) | H11B—C11B—H12B | 108.00 |
C1A—C2A—C3A | 121.1 (2) | C11A—C21A—H21A | 109.00 |
C1B—C2B—C3B | 121.3 (2) | C11A—C21A—H22A | 109.00 |
C2A—C3A—C4A | 120.3 (2) | C31A—C21A—H21A | 109.00 |
C2B—C3B—C4B | 120.5 (2) | C31A—C21A—H22A | 109.00 |
O4A—C4A—C3A | 115.7 (2) | H21A—C21A—H22A | 108.00 |
O4A—C4A—C5A | 124.7 (2) | C11B—C21B—H21B | 109.00 |
C3A—C4A—C5A | 119.6 (2) | C11B—C21B—H22B | 109.00 |
O4B—C4B—C3B | 116.3 (2) | C31B—C21B—H21B | 109.00 |
O4B—C4B—C5B | 124.9 (2) | C31B—C21B—H22B | 109.00 |
C3B—C4B—C5B | 118.8 (2) | H21B—C21B—H22B | 108.00 |
C4A—C5A—C6A | 119.3 (2) | C21A—C31A—H31A | 109.00 |
C4B—C5B—C6B | 119.9 (2) | C21A—C31A—H32A | 109.00 |
C1A—C6A—C5A | 122.4 (2) | C41A—C31A—H31A | 109.00 |
C1B—C6B—C5B | 122.3 (2) | C41A—C31A—H32A | 109.00 |
O4A—C11A—C21A | 107.73 (18) | H31A—C31A—H32A | 108.00 |
O4B—C11B—C21B | 108.9 (2) | C21B—C31B—H31B | 109.00 |
C11A—C21A—C31A | 114.4 (2) | C21B—C31B—H32B | 109.00 |
C11B—C21B—C31B | 114.6 (2) | C41B—C31B—H31B | 109.00 |
C21A—C31A—C41A | 112.8 (2) | C41B—C31B—H32B | 109.00 |
C21B—C31B—C41B | 112.5 (3) | H31B—C31B—H32B | 108.00 |
C1—C2—H2 | 105.00 | C31A—C41A—H41A | 109.00 |
C1A—C2—H2 | 105.00 | C31A—C41A—H42A | 109.00 |
C1B—C2—H2 | 105.00 | C31A—C41A—H43A | 109.00 |
C1A—C2A—H2A | 120.00 | H41A—C41A—H42A | 109.00 |
C3A—C2A—H2A | 119.00 | H41A—C41A—H43A | 109.00 |
C1B—C2B—H2B | 119.00 | H42A—C41A—H43A | 109.00 |
C3B—C2B—H2B | 119.00 | C31B—C41B—H41B | 109.00 |
C2A—C3A—H3A | 120.00 | C31B—C41B—H42B | 109.00 |
C4A—C3A—H3A | 120.00 | C31B—C41B—H43B | 110.00 |
C2B—C3B—H3B | 120.00 | H41B—C41B—H42B | 109.00 |
C4B—C3B—H3B | 120.00 | H41B—C41B—H43B | 110.00 |
C4A—C5A—H5A | 120.00 | H42B—C41B—H43B | 109.00 |
C11A—O4A—C4A—C3A | −173.0 (2) | C6B—C1B—C2—C1 | 144.1 (2) |
C11A—O4A—C4A—C5A | 7.3 (3) | C6B—C1B—C2—C1A | −84.1 (2) |
C4A—O4A—C11A—C21A | 167.44 (19) | C2—C1B—C2B—C3B | −175.0 (2) |
C11B—O4B—C4B—C3B | −170.0 (2) | C6B—C1B—C2B—C3B | 1.9 (3) |
C11B—O4B—C4B—C5B | 10.1 (3) | C2—C1B—C6B—C5B | 174.8 (2) |
C4B—O4B—C11B—C21B | 168.5 (2) | C2B—C1B—C6B—C5B | −2.5 (3) |
Cl1—C1—C2—C1A | −179.73 (16) | C1A—C2A—C3A—C4A | 0.0 (3) |
Cl1—C1—C2—C1B | −47.6 (2) | C1B—C2B—C3B—C4B | 0.9 (3) |
Cl2—C1—C2—C1A | 62.3 (2) | C2A—C3A—C4A—O4A | 178.1 (2) |
Cl2—C1—C2—C1B | −165.60 (16) | C2A—C3A—C4A—C5A | −2.2 (3) |
Cl3—C1—C2—C1A | −57.1 (2) | C2B—C3B—C4B—O4B | 176.8 (2) |
Cl3—C1—C2—C1B | 75.0 (2) | C2B—C3B—C4B—C5B | −3.3 (3) |
C2A—C1A—C2—C1 | 89.6 (3) | O4A—C4A—C5A—C6A | −178.2 (2) |
C2A—C1A—C2—C1B | −44.0 (3) | C3A—C4A—C5A—C6A | 2.1 (3) |
C6A—C1A—C2—C1 | −91.4 (3) | O4B—C4B—C5B—C6B | −177.3 (2) |
C6A—C1A—C2—C1B | 135.1 (2) | C3B—C4B—C5B—C6B | 2.8 (3) |
C2—C1A—C2A—C3A | −178.6 (2) | C4A—C5A—C6A—C1A | 0.4 (4) |
C6A—C1A—C2A—C3A | 2.4 (3) | C4B—C5B—C6B—C1B | 0.1 (3) |
C2—C1A—C6A—C5A | 178.4 (2) | O4A—C11A—C21A—C31A | −62.3 (3) |
C2A—C1A—C6A—C5A | −2.5 (4) | O4B—C11B—C21B—C31B | −63.9 (3) |
C2B—C1B—C2—C1 | −38.9 (3) | C11A—C21A—C31A—C41A | −177.8 (2) |
C2B—C1B—C2—C1A | 92.9 (3) | C11B—C21B—C31B—C41B | −171.1 (3) |
Experimental details
Crystal data | |
Chemical formula | C22H27Cl3O2 |
Mr | 429.79 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 5.7871 (1), 18.3112 (5), 20.3988 (4) |
β (°) | 91.160 (2) |
V (Å3) | 2161.19 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.44 |
Crystal size (mm) | 0.15 × 0.15 × 0.10 |
Data collection | |
Diffractometer | Oxford Gemini-S CCD area-detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2012) |
Tmin, Tmax | 0.951, 0.981 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14149, 4245, 3486 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.047, 0.110, 1.07 |
No. of reflections | 4245 |
No. of parameters | 244 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.18 |
Computer programs: CrysAlis PRO (Agilent, 2012), SIR92 (Altomare et al., 1993), SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C2B—H2B···Cl3 | 0.9300 | 2.6900 | 3.361 (2) | 130.00 |
Acknowledgements
The author acknowledges financial support from the Australian Research Council, and from the Science and Engineering Faculty and the University Library, Queensland University of Technology.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The title compound, C22H27Cl302, is the 4-butoxyphenyl analogue of the insecticide DDT [1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane] as well as the 4-methoxyphenyl analogue, also an insecticide (methoxychlor). Criteria for insecticidal activity of the DDT analogues have been described (Läuger et al., 1944; Kennard & Smith, 1980). The crystal structures of both DDT (DeLacy & Kennard, 1972) and methoxychlor (Smith et al., 1976) have been reported but there are no other structures of 4-alkoxyphenyl DDT derivatives in the crystallographic literature.
In the structure of the title compound (Fig. 1), the dihedral angle between the two phenyl planes is 79.61 (11)° which compares with 77.7° in the structure of methoxychlor (Smith et al., 1976) and 64.7° in DDT (DeLacy & Kennard, 1972). The conformations of the two butoxy side chains relative to their phenyl rings (A and B) are essentially identical [comparative torsion angles C3—C4—O4—C11, C4—O4—C11–C21, O4—C11—C21—C31 and C11—C21—C31—C41 are -173.0 (2), 167.44 (19), -62.3 (3), -177.8 (2)° (A) and -170.0 (2), 168.5 (2), -63.9 (3), -171.1 (3)° (B), respectively]. The B ring conformation is stabilized by an intramolecular aromatic C2B—H···Cl3 interaction (Table 1). Present in the crystal packing is a relatively short intermolecular Cl···Cl contact [3.4302 (9) Å] but no other significant interactions are found (Fig. 2).