organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 2056-9890

2,4-Di­chloro-6-[2-meth­­oxy-4-(prop-2-en-1-yl)phen­­oxy]-1,3,5-triazine

aCollege of Science, Northwest A&F University, Yangling Shaanxi 712100, People's Republic of China
*Correspondence e-mail: jinminggaocn@yahoo.com.cn

(Received 15 September 2010; accepted 19 October 2010; online 30 October 2010)

The title compound, C13H11Cl2N3O2, was obtained by the reaction of eugenol and cyanuric chloride. The dihedral angle between the benzene and triazine rings is 87.56 (4)°. Two C atoms of the allyl group are disordered over two sites in a 0.72 (2):0.28 (2) ratio.

Related literature

For background to the Williamson reaction in organic synthesis, see: Dermer (1934[Dermer, O. C. (1934). Chem. Rev. 14, 385-430.]). For related structures, see: Ma et al.(2010a[Ma, Y.-T., Wang, J.-J., Liu, X.-W., Yang, S.-X. & Gao, J.-M. (2010a). Acta Cryst. E66, o52.],b[Ma, Y.-T., Shi, X.-W., Shuai, Q. & Gao, J.-M. (2010b). Acta Cryst. E66, o2293.],c[Ma, Y.-T., Zhang, A.-L., Yuan, M.-S. & Gao, J.-M. (2010c). Acta Cryst. E66, o2468.]). For agricultural applications of the title compound, see: Manning et al. (1987[Manning, D. T., Cappy, J. J., Cooke, A. R., Sheads, R. E., Wu, T. T., Lopes, A., Phillips, J. L. & Outcalt, R. J. (1987). PCT Int. Appl. WO8704321(A2).]).

[Scheme 1]

Experimental

Crystal data
  • C13H11Cl2N3O2

  • Mr = 312.15

  • Monoclinic, P 21 /c

  • a = 11.4771 (12) Å

  • b = 8.6050 (9) Å

  • c = 14.7189 (13) Å

  • β = 103.077 (1)°

  • V = 1415.9 (2) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.46 mm−1

  • T = 298 K

  • 0.42 × 0.35 × 0.33 mm

Data collection
  • Siemens SMART CCD area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996[Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.]) Tmin = 0.830, Tmax = 0.862

  • 6755 measured reflections

  • 2499 independent reflections

  • 1595 reflections with I > 2σ(I)

  • Rint = 0.027

Refinement
  • R[F2 > 2σ(F2)] = 0.038

  • wR(F2) = 0.099

  • S = 1.02

  • 2499 reflections

  • 201 parameters

  • H-atom parameters constrained

  • Δρmax = 0.23 e Å−3

  • Δρmin = −0.23 e Å−3

Data collection: SMART (Siemens, 1996[Siemens (1996). SMART and SAINT. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Siemens, 1996[Siemens (1996). SMART and SAINT. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); software used to prepare material for publication: SHELXTL.

Supporting information


Comment top

In this paper, we used the Williamson reaction (Dermer, 1934) to form the title compound, (I), which was synthesized by the reaction of eugenol, sodium hydroxide and cyanuric chloride at 278 K. We have previously reported three compounds of this type [Ma et al.(2010a, 2010b and 2010c)]. In (I)(Fig.1), the dihedral angle between the benzene ring C4—C9 and the triazine ring C2N3C3N1C1N2 is 87.56 (4)°. There are no significantly short intermolecular contacts in the crystal lattice.

Related literature top

For background to the Williamson reaction in organic synthesis, see: Dermer (1934). For related structures, see: Ma et al.(2010a,b,c). For the agricultural applications of the title compound, see: Manning et al. (1987).

Experimental top

492 mg eugenol (3 mmol) was dissolved in 1.2 g 10% sodium hydroxide (3 mmol) in a 100 mL round-bottom flask and the water was then removed in vacuo. Added 30 ml acetonitrile into the flask in an ice bath and after stirring 10 min cyanuric chloride (3 mmol) was added and kept stirred for 2 h at 278 K. The reaction mixture was filtered and solvent was evaporated under vacuum to dryness. The solid mass was dissolved in EtOAc, washed with saturated NaHCO3 and brine, dried over anhydrous Na2SO4, concentrated and purified with column chromatography to afford the crude product. White crystals suitable for X-ray analysis were obtained by slow evaporation of a solution of the title compound in n-hexane/ethyl acetate (1:1 V/V) at room temperature.

Refinement top

The atoms C12 and C13 were found to be disordered over two sites, and the ratio of the occupancy factors refined to 0.718 (7):0.282 (7) and 0.718 (7):0.282 (7) for atoms C12: C12' and C13: C13' respectively.The positions of all H atoms were determined geometrically and refined using a riding model with C—H = 0.93–0.97 Å and Uiso(methyl H) = 1.5Ueq(C) and 1.2Ueq for other H atoms.

Structure description top

In this paper, we used the Williamson reaction (Dermer, 1934) to form the title compound, (I), which was synthesized by the reaction of eugenol, sodium hydroxide and cyanuric chloride at 278 K. We have previously reported three compounds of this type [Ma et al.(2010a, 2010b and 2010c)]. In (I)(Fig.1), the dihedral angle between the benzene ring C4—C9 and the triazine ring C2N3C3N1C1N2 is 87.56 (4)°. There are no significantly short intermolecular contacts in the crystal lattice.

For background to the Williamson reaction in organic synthesis, see: Dermer (1934). For related structures, see: Ma et al.(2010a,b,c). For the agricultural applications of the title compound, see: Manning et al. (1987).

Computing details top

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXS97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of (I), with atom labels and displacement ellipsoids drawn at the 30% probability level.The disordered atoms C12 and C13 of the allyl group are the major component.
2,4-Dichloro-6-[2-methoxy-4-(prop-2-en-1-yl)phenoxy]-1,3,5-triazine top
Crystal data top
C13H11Cl2N3O2Dx = 1.464 Mg m3
Mr = 312.15Melting point = 385–386 K
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
a = 11.4771 (12) ÅCell parameters from 2205 reflections
b = 8.6050 (9) Åθ = 2.8–25.7°
c = 14.7189 (13) ŵ = 0.46 mm1
β = 103.077 (1)°T = 298 K
V = 1415.9 (2) Å3Monoclinic, colourless
Z = 40.42 × 0.35 × 0.33 mm
F(000) = 640
Data collection top
Siemens SMART CCD area-detector
diffractometer
2499 independent reflections
Radiation source: fine-focus sealed tube1595 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.027
phi and ω scansθmax = 25.0°, θmin = 1.8°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
h = 1312
Tmin = 0.830, Tmax = 0.862k = 107
6755 measured reflectionsl = 1717
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.038Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.099H-atom parameters constrained
S = 1.02 w = 1/[σ2(Fo2) + (0.0303P)2 + 0.7779P]
where P = (Fo2 + 2Fc2)/3
2499 reflections(Δ/σ)max = 0.001
201 parametersΔρmax = 0.23 e Å3
0 restraintsΔρmin = 0.23 e Å3
Crystal data top
C13H11Cl2N3O2V = 1415.9 (2) Å3
Mr = 312.15Z = 4
Monoclinic, P21/cMo Kα radiation
a = 11.4771 (12) ŵ = 0.46 mm1
b = 8.6050 (9) ÅT = 298 K
c = 14.7189 (13) Å0.42 × 0.35 × 0.33 mm
β = 103.077 (1)°
Data collection top
Siemens SMART CCD area-detector
diffractometer
2499 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
1595 reflections with I > 2σ(I)
Tmin = 0.830, Tmax = 0.862Rint = 0.027
6755 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0380 restraints
wR(F2) = 0.099H-atom parameters constrained
S = 1.02Δρmax = 0.23 e Å3
2499 reflectionsΔρmin = 0.23 e Å3
201 parameters
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/UeqOcc. (<1)
Cl10.23031 (7)0.11286 (10)0.56145 (6)0.0754 (3)
Cl20.08975 (7)0.41854 (15)0.81780 (6)0.1061 (4)
N10.29775 (19)0.4567 (3)0.78327 (14)0.0541 (6)
N20.36101 (18)0.3198 (2)0.66250 (14)0.0459 (5)
N30.16967 (19)0.2701 (3)0.69226 (16)0.0621 (7)
O10.47642 (15)0.5029 (2)0.75543 (11)0.0524 (5)
O20.47302 (16)0.6829 (2)0.60769 (12)0.0583 (5)
C10.3757 (2)0.4227 (3)0.73157 (17)0.0450 (6)
C20.2573 (2)0.2488 (3)0.64855 (18)0.0525 (7)
C30.1983 (2)0.3770 (4)0.7582 (2)0.0613 (8)
C40.5660 (2)0.4821 (3)0.70437 (17)0.0439 (6)
C50.5664 (2)0.5829 (3)0.63087 (17)0.0433 (6)
C60.6619 (2)0.5747 (3)0.58824 (17)0.0486 (7)
H60.66440.64110.53890.058*
C70.7537 (2)0.4693 (3)0.61776 (18)0.0499 (7)
C80.7481 (2)0.3691 (3)0.6892 (2)0.0567 (7)
H80.80820.29580.70820.068*
C90.6542 (2)0.3762 (3)0.73313 (19)0.0543 (7)
H90.65130.30900.78200.065*
C100.4713 (3)0.7868 (3)0.5320 (2)0.0654 (8)
H10A0.53820.85650.54780.098*
H10B0.39830.84560.51980.098*
H10C0.47630.72850.47740.098*
C110.8576 (2)0.4640 (4)0.5703 (2)0.0653 (8)
H11A0.87790.56930.55630.078*0.72 (2)
H11B0.92650.41990.61310.078*0.72 (2)
H11C0.84640.54380.52260.078*0.28 (2)
H11D0.93070.48830.61570.078*0.28 (2)
C120.8333 (7)0.3729 (13)0.4838 (7)0.066 (2)0.72 (2)
H120.76610.39940.43820.079*0.72 (2)
C130.8975 (13)0.2594 (16)0.4660 (11)0.086 (3)0.72 (2)
H13A0.96540.22920.50990.103*0.72 (2)
H13B0.87590.20740.40930.103*0.72 (2)
C12'0.876 (2)0.317 (2)0.527 (2)0.067 (6)0.28 (2)
H12'0.88990.22720.56340.080*0.28 (2)
C13'0.873 (3)0.310 (5)0.433 (2)0.082 (8)0.28 (2)
H13C0.85870.39920.39700.099*0.28 (2)
H13D0.88440.21520.40600.099*0.28 (2)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.0806 (5)0.0678 (5)0.0734 (5)0.0163 (4)0.0081 (4)0.0086 (4)
Cl20.0585 (5)0.1906 (12)0.0795 (6)0.0079 (6)0.0370 (4)0.0104 (7)
N10.0501 (13)0.0681 (16)0.0488 (13)0.0005 (12)0.0208 (11)0.0046 (12)
N20.0491 (13)0.0447 (13)0.0449 (13)0.0015 (11)0.0129 (10)0.0040 (11)
N30.0480 (13)0.0831 (19)0.0547 (15)0.0086 (13)0.0105 (11)0.0101 (14)
O10.0533 (11)0.0569 (12)0.0531 (11)0.0097 (10)0.0246 (9)0.0077 (9)
O20.0602 (11)0.0621 (12)0.0580 (12)0.0142 (10)0.0244 (9)0.0081 (10)
C10.0452 (15)0.0491 (17)0.0422 (15)0.0015 (13)0.0127 (12)0.0103 (13)
C20.0545 (16)0.0548 (18)0.0453 (15)0.0022 (15)0.0052 (13)0.0124 (13)
C30.0517 (17)0.086 (2)0.0493 (17)0.0026 (17)0.0182 (14)0.0151 (17)
C40.0440 (14)0.0464 (16)0.0439 (15)0.0098 (13)0.0155 (12)0.0053 (13)
C50.0459 (14)0.0401 (15)0.0452 (15)0.0030 (12)0.0133 (11)0.0048 (13)
C60.0520 (15)0.0490 (17)0.0481 (15)0.0064 (14)0.0177 (12)0.0004 (13)
C70.0448 (15)0.0508 (17)0.0573 (17)0.0077 (14)0.0181 (13)0.0059 (14)
C80.0484 (15)0.0515 (18)0.0705 (19)0.0048 (14)0.0142 (14)0.0019 (15)
C90.0589 (17)0.0510 (17)0.0547 (17)0.0030 (15)0.0165 (14)0.0066 (14)
C100.0724 (19)0.060 (2)0.0636 (19)0.0131 (17)0.0160 (15)0.0119 (17)
C110.0523 (17)0.071 (2)0.080 (2)0.0070 (16)0.0292 (16)0.0036 (18)
C120.051 (3)0.090 (5)0.064 (4)0.000 (3)0.027 (3)0.004 (4)
C130.074 (6)0.086 (8)0.108 (11)0.012 (5)0.044 (6)0.021 (6)
C12'0.068 (11)0.068 (10)0.078 (15)0.013 (8)0.043 (11)0.010 (9)
C13'0.074 (15)0.10 (2)0.081 (19)0.010 (14)0.036 (13)0.007 (12)
Geometric parameters (Å, º) top
Cl1—C21.711 (3)C8—H80.9300
Cl2—C31.715 (3)C9—H90.9300
N1—C31.312 (3)C10—H10A0.9600
N1—C11.332 (3)C10—H10B0.9600
N2—C21.312 (3)C10—H10C0.9600
N2—C11.330 (3)C11—C12'1.451 (18)
N3—C31.323 (4)C11—C121.466 (7)
N3—C21.324 (3)C11—H11A0.9700
O1—C11.324 (3)C11—H11B0.9700
O1—C41.416 (3)C11—H11C0.9700
O2—C51.356 (3)C11—H11D0.9700
O2—C101.425 (3)C12—C131.29 (2)
C4—C91.356 (4)C12—H120.9300
C4—C51.387 (3)C13—H13A0.9300
C5—C61.382 (3)C13—H13B0.9300
C6—C71.384 (3)C12'—C13'1.38 (5)
C6—H60.9300C12'—H12'0.9300
C7—C81.372 (4)C13'—H13C0.9300
C7—C111.513 (3)C13'—H13D0.9300
C8—C91.378 (3)
C3—N1—C1112.3 (2)H10B—C10—H10C109.5
C2—N2—C1112.5 (2)C12'—C11—C1234.3 (9)
C3—N3—C2111.3 (2)C12'—C11—C7115.8 (6)
C1—O1—C4119.25 (19)C12—C11—C7113.7 (3)
C5—O2—C10117.7 (2)C12'—C11—H11A131.1
O1—C1—N2120.1 (2)C12—C11—H11A108.8
O1—C1—N1113.1 (2)C7—C11—H11A108.8
N2—C1—N1126.7 (2)C12'—C11—H11B76.4
N2—C2—N3128.4 (3)C12—C11—H11B108.8
N2—C2—Cl1116.1 (2)C7—C11—H11B108.8
N3—C2—Cl1115.5 (2)H11A—C11—H11B107.7
N1—C3—N3128.7 (3)C12'—C11—H11C108.1
N1—C3—Cl2115.7 (2)C12—C11—H11C77.4
N3—C3—Cl2115.6 (2)C7—C11—H11C108.9
C9—C4—C5122.0 (2)H11A—C11—H11C35.2
C9—C4—O1120.0 (2)H11B—C11—H11C134.6
C5—C4—O1117.7 (2)C12'—C11—H11D107.5
O2—C5—C6125.5 (2)C12—C11—H11D132.7
O2—C5—C4116.8 (2)C7—C11—H11D108.9
C6—C5—C4117.7 (2)H11A—C11—H11D74.5
C5—C6—C7121.1 (2)H11B—C11—H11D35.4
C5—C6—H6119.4H11C—C11—H11D107.4
C7—C6—H6119.4C13—C12—C11125.3 (14)
C8—C7—C6119.2 (2)C13—C12—H11C140.6
C8—C7—C11120.9 (3)C11—C12—H11C37.0
C6—C7—C11119.9 (3)C13—C12—H12117.4
C7—C8—C9120.6 (3)C11—C12—H12117.4
C7—C8—H8119.7H11C—C12—H1291.6
C9—C8—H8119.7C12—C13—H13A120.0
C4—C9—C8119.4 (3)C12—C13—H13B120.0
C4—C9—H9120.3H13A—C13—H13B120.0
C8—C9—H9120.3C13'—C12'—C11120 (3)
O2—C10—H10A109.5C13'—C12'—H12'119.9
O2—C10—H10B109.5C11—C12'—H12'119.9
H10A—C10—H10B109.5C12'—C13'—H13C120.0
O2—C10—H10C109.5C12'—C13'—H13D120.0
H10A—C10—H10C109.5H13C—C13'—H13D120.0
C4—O1—C1—N22.3 (3)C9—C4—C5—C61.4 (4)
C4—O1—C1—N1178.1 (2)O1—C4—C5—C6172.4 (2)
C2—N2—C1—O1179.1 (2)O2—C5—C6—C7179.3 (2)
C2—N2—C1—N10.5 (4)C4—C5—C6—C70.2 (4)
C3—N1—C1—O1179.5 (2)C5—C6—C7—C81.5 (4)
C3—N1—C1—N20.9 (4)C5—C6—C7—C11179.5 (2)
C1—N2—C2—N31.6 (4)C6—C7—C8—C92.0 (4)
C1—N2—C2—Cl1179.54 (18)C11—C7—C8—C9179.0 (3)
C3—N3—C2—N21.0 (4)C5—C4—C9—C80.9 (4)
C3—N3—C2—Cl1180.0 (2)O1—C4—C9—C8172.7 (2)
C1—N1—C3—N31.5 (4)C7—C8—C9—C40.8 (4)
C1—N1—C3—Cl2177.49 (19)C8—C7—C11—C12'58.8 (16)
C2—N3—C3—N10.7 (4)C6—C7—C11—C12'120.3 (16)
C2—N3—C3—Cl2178.3 (2)C8—C7—C11—C1296.6 (7)
C1—O1—C4—C992.5 (3)C6—C7—C11—C1282.5 (7)
C1—O1—C4—C593.6 (3)C12'—C11—C12—C1323.9 (13)
C10—O2—C5—C61.2 (4)C7—C11—C12—C13125.3 (10)
C10—O2—C5—C4179.6 (2)C12—C11—C12'—C13'26 (2)
C9—C4—C5—O2179.4 (2)C7—C11—C12'—C13'121 (2)
O1—C4—C5—O26.8 (3)

Experimental details

Crystal data
Chemical formulaC13H11Cl2N3O2
Mr312.15
Crystal system, space groupMonoclinic, P21/c
Temperature (K)298
a, b, c (Å)11.4771 (12), 8.6050 (9), 14.7189 (13)
β (°) 103.077 (1)
V3)1415.9 (2)
Z4
Radiation typeMo Kα
µ (mm1)0.46
Crystal size (mm)0.42 × 0.35 × 0.33
Data collection
DiffractometerSiemens SMART CCD area-detector
Absorption correctionMulti-scan
(SADABS; Sheldrick, 1996)
Tmin, Tmax0.830, 0.862
No. of measured, independent and
observed [I > 2σ(I)] reflections
6755, 2499, 1595
Rint0.027
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.038, 0.099, 1.02
No. of reflections2499
No. of parameters201
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.23, 0.23

Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

 

Footnotes

Additional address: College of Life Sciences, Northwest A&F University, Yangling Shaanxi 712100, People's Republic of China.

Acknowledgements

We would like to acknowledge funding support from the National Natural Science Foundation of China (grant No. 30971882), the Program of Natural Science Basic Research in Shaanxi (No. 2009JM3010) and the Program of Northwest A&F University (No. Z111020908)

References

First citationDermer, O. C. (1934). Chem. Rev. 14, 385–430.  CrossRef CAS Google Scholar
First citationMa, Y.-T., Shi, X.-W., Shuai, Q. & Gao, J.-M. (2010b). Acta Cryst. E66, o2293.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationMa, Y.-T., Wang, J.-J., Liu, X.-W., Yang, S.-X. & Gao, J.-M. (2010a). Acta Cryst. E66, o52.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationMa, Y.-T., Zhang, A.-L., Yuan, M.-S. & Gao, J.-M. (2010c). Acta Cryst. E66, o2468.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationManning, D. T., Cappy, J. J., Cooke, A. R., Sheads, R. E., Wu, T. T., Lopes, A., Phillips, J. L. & Outcalt, R. J. (1987). PCT Int. Appl. WO8704321(A2).  Google Scholar
First citationSheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.  Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationSiemens (1996). SMART and SAINT. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA.  Google Scholar

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