Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807026049/lw2020sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807026049/lw2020Isup2.hkl |
CCDC reference: 654903
A solution of 25 ml of NH3 in 150 ml of water and 100 ml of ethanol was placed in a 500-ml bolt-head flask provided with a mechanical stirrer. The flask was immersed in a water bath and the temperature of the solution was maintained at 393–398 K. The solution was vigorously stirred and one half of a previously prepared mixture of 4-(methylthio)benzaldehyde (38 g, 0.25 mol) and acetone (7.3 g, 0.125 mol) was added. A flocculent precipitate was formed within 2–3 minutes. After 15 minutes, the remainder of the aldehyde-acetone mixture was added and the stirring was continued for a further 40 minutes. The crude product obtained was filtered and washed with cold water to eliminate the alkali (yield: 70%). The compound was purified from ethanol-dioxane mixture (8:2 v/v). The crystal growth was done in acetone:toluene (1:1 v/v) by slow evaporation to yield amber plates and slabs of (I) (m.p. 348–353 K).
Both terminal methyl groups are disordered over two positions, with occupancies of 0.557 (10):0.443 (10) for C18A/C18B and 0.642 (9):0.358 (9) for C19A/C19B (occupancy sums constrained to unity in both cases).
The hydrogen atoms were geometrically placed (C—H = 0.93–0.98 Å, N—H = 0.89 Å) and refined as riding with Uiso(H) = 1.2Ueq(C,N) or 1.5Ueq(methyl C).
As part of our ongoing studies Butcher, Yathirajan, Sarojini, Narayana & Indira, 2006; Butcher, Yathirajan, Sarojini, Narayana & Vijaya Raj, 2006; Harrison et al., 2006) of the syntheses and structures of chalcone derivatives, the title compound, (I), (Fig. 1) is described here. It arose as an unexpected product from an attempt to prepare the symmetric methylthio-substituted bis-chalcone 1,5-di(4-methylthiophenyl)penta-1,4-dien-3-one.
The dihedral angle between the mean planes of the aromatic rings in (I) is 31.87 (14)°. The molecule of (I) is chiral. In the arbitrarily chose asymmetric molecule, C11 has R configuration, but crystal symmetry generates a racemic mixture.
In the crystal, adjacent molecules of (I) interact by way of N—H···N hydrogen bonds (Table 1) to result in C(2) chains (Etter, 1990) propagating in [010] (Fig. 2).
For related structures, see: Butcher, Yathirajan, Sarojini, Narayana & Indira (2006); Butcher, Yathirajan, Sarojini, Narayana & Vijaya Raj (2006); Harrison et al. (2006); Etter (1990).
Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
C19H21NOS2 | F(000) = 1456 |
Mr = 343.49 | Dx = 1.294 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 723 reflections |
a = 16.705 (3) Å | θ = 4.4–23.3° |
b = 5.5968 (10) Å | µ = 0.31 mm−1 |
c = 37.730 (7) Å | T = 295 K |
V = 3527.5 (11) Å3 | Slab, orange |
Z = 8 | 0.40 × 0.20 × 0.05 mm |
Bruker SMART 1000 CCD diffractometer | 3278 independent reflections |
Radiation source: fine-focus sealed tube | 1465 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.073 |
ω scans | θmax = 25.5°, θmin = 4.3° |
Absorption correction: multi-scan (SADABS; Bruker, 1999) | h = −20→19 |
Tmin = 0.888, Tmax = 0.986 | k = −6→6 |
17587 measured reflections | l = −45→43 |
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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.149 | H-atom parameters constrained |
S = 0.91 | w = 1/[σ2(Fo2) + (0.0713P)2] where P = (Fo2 + 2Fc2)/3 |
3278 reflections | (Δ/σ)max < 0.001 |
232 parameters | Δρmax = 0.23 e Å−3 |
0 restraints | Δρmin = −0.29 e Å−3 |
C19H21NOS2 | V = 3527.5 (11) Å3 |
Mr = 343.49 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 16.705 (3) Å | µ = 0.31 mm−1 |
b = 5.5968 (10) Å | T = 295 K |
c = 37.730 (7) Å | 0.40 × 0.20 × 0.05 mm |
Bruker SMART 1000 CCD diffractometer | 3278 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1999) | 1465 reflections with I > 2σ(I) |
Tmin = 0.888, Tmax = 0.986 | Rint = 0.073 |
17587 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.149 | H-atom parameters constrained |
S = 0.91 | Δρmax = 0.23 e Å−3 |
3278 reflections | Δρmin = −0.29 e Å−3 |
232 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 | Occ. (<1) | |
C1 | 0.5922 (3) | 0.5615 (7) | 0.37528 (10) | 0.0917 (11) | |
H1 | 0.5662 | 0.6435 | 0.3572 | 0.110* | |
C2 | 0.5875 (2) | 0.6479 (7) | 0.40946 (10) | 0.0950 (12) | |
H2 | 0.5578 | 0.7850 | 0.4140 | 0.114* | |
C3 | 0.6256 (2) | 0.5359 (7) | 0.43673 (9) | 0.0785 (10) | |
C4 | 0.6685 (2) | 0.3312 (7) | 0.42919 (9) | 0.0847 (11) | |
H4 | 0.6947 | 0.2505 | 0.4473 | 0.102* | |
C5 | 0.6728 (2) | 0.2448 (6) | 0.39472 (9) | 0.0777 (10) | |
H5 | 0.7023 | 0.1074 | 0.3901 | 0.093* | |
C6 | 0.6343 (2) | 0.3585 (6) | 0.36719 (9) | 0.0695 (9) | |
C7 | 0.6364 (2) | 0.2713 (6) | 0.33017 (9) | 0.0729 (9) | |
H7 | 0.6186 | 0.3768 | 0.3128 | 0.087* | |
C8 | 0.6605 (2) | 0.0640 (7) | 0.31933 (10) | 0.0780 (10) | |
H8 | 0.6817 | −0.0376 | 0.3364 | 0.094* | |
C9 | 0.65773 (19) | −0.0279 (7) | 0.28275 (8) | 0.0696 (9) | |
C10 | 0.6515 (2) | 0.1376 (5) | 0.25147 (8) | 0.0698 (9) | |
H10A | 0.6292 | 0.2887 | 0.2593 | 0.084* | |
H10B | 0.7047 | 0.1685 | 0.2423 | 0.084* | |
C11 | 0.60051 (19) | 0.0390 (6) | 0.22233 (7) | 0.0639 (8) | |
H11 | 0.6193 | −0.1239 | 0.2177 | 0.077* | |
C12 | 0.60787 (18) | 0.1753 (5) | 0.18788 (7) | 0.0584 (8) | |
C13 | 0.6599 (2) | 0.0985 (6) | 0.16217 (9) | 0.0763 (10) | |
H13 | 0.6914 | −0.0353 | 0.1665 | 0.092* | |
C14 | 0.6667 (2) | 0.2145 (7) | 0.13016 (9) | 0.0807 (10) | |
H14 | 0.7020 | 0.1562 | 0.1132 | 0.097* | |
C15 | 0.6221 (2) | 0.4150 (6) | 0.12276 (8) | 0.0647 (8) | |
C16 | 0.57100 (19) | 0.4968 (6) | 0.14881 (9) | 0.0748 (9) | |
H16 | 0.5404 | 0.6330 | 0.1448 | 0.090* | |
C17 | 0.5650 (2) | 0.3779 (6) | 0.18074 (8) | 0.0734 (9) | |
H17 | 0.5307 | 0.4376 | 0.1980 | 0.088* | |
C18A | 0.6696 (8) | 0.4526 (18) | 0.50761 (19) | 0.185 (6) | 0.558 (10) |
H18A | 0.6800 | 0.5275 | 0.5300 | 0.278* | 0.558 (10) |
H18B | 0.7194 | 0.4056 | 0.4969 | 0.278* | 0.558 (10) |
H18C | 0.6367 | 0.3142 | 0.5111 | 0.278* | 0.558 (10) |
C18B | 0.5447 (6) | 0.868 (2) | 0.4815 (2) | 0.129 (5) | 0.442 (10) |
H18D | 0.5360 | 0.9167 | 0.5056 | 0.194* | 0.442 (10) |
H18E | 0.4962 | 0.8019 | 0.4721 | 0.194* | 0.442 (10) |
H18F | 0.5604 | 1.0040 | 0.4677 | 0.194* | 0.442 (10) |
C19A | 0.5590 (4) | 0.7683 (11) | 0.07904 (14) | 0.103 (3) | 0.645 (8) |
H19A | 0.5703 | 0.8896 | 0.0963 | 0.154* | 0.645 (8) |
H19B | 0.5078 | 0.6982 | 0.0839 | 0.154* | 0.645 (8) |
H19C | 0.5584 | 0.8382 | 0.0558 | 0.154* | 0.645 (8) |
C19B | 0.6783 (9) | 0.395 (2) | 0.0529 (3) | 0.142 (6) | 0.355 (8) |
H19D | 0.7305 | 0.3581 | 0.0620 | 0.212* | 0.355 (8) |
H19E | 0.6834 | 0.4812 | 0.0310 | 0.212* | 0.355 (8) |
H19F | 0.6495 | 0.2490 | 0.0487 | 0.212* | 0.355 (8) |
N1 | 0.52006 (13) | 0.0200 (4) | 0.23479 (6) | 0.0664 (7) | |
H1A | 0.4895 | −0.0385 | 0.2175 | 0.080* | |
H1B | 0.5026 | 0.1648 | 0.2408 | 0.080* | |
O1 | 0.66252 (17) | −0.2418 (5) | 0.27820 (6) | 0.0981 (8) | |
S1 | 0.62088 (8) | 0.6514 (2) | 0.48013 (3) | 0.1207 (5) | |
S2 | 0.63084 (7) | 0.5537 (2) | 0.08090 (2) | 0.0983 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.125 (3) | 0.075 (3) | 0.075 (3) | 0.013 (2) | −0.012 (2) | 0.004 (2) |
C2 | 0.125 (3) | 0.083 (3) | 0.077 (3) | 0.018 (2) | −0.002 (2) | −0.009 (2) |
C3 | 0.094 (3) | 0.082 (2) | 0.059 (2) | −0.001 (2) | 0.0011 (19) | 0.003 (2) |
C4 | 0.092 (3) | 0.100 (3) | 0.062 (2) | 0.006 (2) | −0.0071 (19) | 0.018 (2) |
C5 | 0.083 (2) | 0.077 (2) | 0.073 (2) | 0.0083 (19) | 0.005 (2) | 0.002 (2) |
C6 | 0.079 (2) | 0.073 (2) | 0.057 (2) | −0.009 (2) | −0.0037 (18) | 0.0082 (18) |
C7 | 0.080 (2) | 0.065 (2) | 0.074 (2) | −0.0024 (19) | −0.0078 (19) | 0.0111 (19) |
C8 | 0.084 (2) | 0.073 (2) | 0.077 (3) | −0.001 (2) | −0.0053 (19) | 0.016 (2) |
C9 | 0.077 (2) | 0.071 (2) | 0.061 (2) | −0.002 (2) | 0.0003 (16) | 0.0004 (19) |
C10 | 0.082 (2) | 0.066 (2) | 0.062 (2) | −0.0021 (18) | −0.0050 (17) | 0.0043 (17) |
C11 | 0.072 (2) | 0.068 (2) | 0.0519 (18) | −0.0042 (17) | 0.0032 (16) | −0.0025 (15) |
C12 | 0.0608 (19) | 0.062 (2) | 0.0520 (18) | −0.0067 (17) | 0.0006 (16) | −0.0058 (16) |
C13 | 0.079 (2) | 0.084 (2) | 0.065 (2) | 0.0177 (19) | 0.0108 (18) | 0.0042 (19) |
C14 | 0.080 (2) | 0.099 (3) | 0.063 (2) | 0.013 (2) | 0.0220 (18) | 0.000 (2) |
C15 | 0.068 (2) | 0.078 (2) | 0.0483 (18) | −0.0090 (19) | 0.0000 (16) | 0.0006 (16) |
C16 | 0.078 (2) | 0.076 (2) | 0.070 (2) | 0.0085 (18) | 0.0070 (19) | 0.004 (2) |
C17 | 0.086 (2) | 0.080 (2) | 0.0547 (19) | 0.007 (2) | 0.0187 (18) | −0.0008 (18) |
C18A | 0.335 (16) | 0.165 (9) | 0.055 (5) | 0.048 (10) | −0.013 (7) | −0.006 (5) |
C18B | 0.140 (10) | 0.155 (10) | 0.092 (7) | 0.039 (8) | −0.010 (6) | −0.011 (7) |
C19A | 0.102 (5) | 0.126 (5) | 0.080 (4) | 0.002 (4) | −0.005 (3) | 0.024 (4) |
C19B | 0.205 (14) | 0.172 (13) | 0.048 (7) | 0.017 (11) | 0.033 (8) | 0.020 (7) |
N1 | 0.0436 (14) | 0.101 (2) | 0.0549 (14) | −0.0148 (13) | 0.0039 (11) | 0.0137 (15) |
O1 | 0.140 (2) | 0.0674 (16) | 0.0873 (18) | 0.0104 (16) | −0.0053 (15) | 0.0060 (14) |
S1 | 0.1498 (11) | 0.1446 (11) | 0.0678 (7) | 0.0149 (9) | 0.0039 (7) | −0.0160 (7) |
S2 | 0.1033 (8) | 0.1321 (10) | 0.0594 (6) | −0.0058 (7) | 0.0019 (5) | 0.0185 (6) |
C1—C6 | 1.370 (4) | C13—H13 | 0.9300 |
C1—C2 | 1.379 (5) | C14—C15 | 1.375 (4) |
C1—H1 | 0.9300 | C14—H14 | 0.9300 |
C2—C3 | 1.362 (5) | C15—C16 | 1.379 (4) |
C2—H2 | 0.9300 | C15—S2 | 1.766 (3) |
C3—C4 | 1.381 (5) | C16—C17 | 1.380 (4) |
C3—S1 | 1.762 (3) | C16—H16 | 0.9300 |
C4—C5 | 1.389 (4) | C17—H17 | 0.9300 |
C4—H4 | 0.9300 | C18A—S1 | 1.725 (9) |
C5—C6 | 1.378 (4) | C18A—H18A | 0.9600 |
C5—H5 | 0.9300 | C18A—H18B | 0.9600 |
C6—C7 | 1.480 (4) | C18A—H18C | 0.9600 |
C7—C8 | 1.294 (4) | C18B—S1 | 1.758 (10) |
C7—H7 | 0.9300 | C18B—H18D | 0.9600 |
C8—C9 | 1.473 (5) | C18B—H18E | 0.9600 |
C8—H8 | 0.9300 | C18B—H18F | 0.9600 |
C9—O1 | 1.212 (4) | C19A—S2 | 1.699 (6) |
C9—C10 | 1.504 (4) | C19A—H19A | 0.9600 |
C10—C11 | 1.496 (4) | C19A—H19B | 0.9600 |
C10—H10A | 0.9700 | C19A—H19C | 0.9600 |
C10—H10B | 0.9700 | C19B—S2 | 1.594 (12) |
C11—N1 | 1.428 (4) | C19B—H19D | 0.9600 |
C11—C12 | 1.512 (4) | C19B—H19E | 0.9600 |
C11—H11 | 0.9800 | C19B—H19F | 0.9600 |
C12—C17 | 1.367 (4) | N1—H1A | 0.8900 |
C12—C13 | 1.372 (4) | N1—H1B | 0.8900 |
C13—C14 | 1.376 (4) | ||
C6—C1—C2 | 121.9 (4) | C15—C14—C13 | 121.2 (3) |
C6—C1—H1 | 119.0 | C15—C14—H14 | 119.4 |
C2—C1—H1 | 119.0 | C13—C14—H14 | 119.4 |
C3—C2—C1 | 121.2 (4) | C14—C15—C16 | 117.5 (3) |
C3—C2—H2 | 119.4 | C14—C15—S2 | 119.7 (3) |
C1—C2—H2 | 119.4 | C16—C15—S2 | 122.8 (3) |
C2—C3—C4 | 117.9 (3) | C15—C16—C17 | 120.4 (3) |
C2—C3—S1 | 120.8 (3) | C15—C16—H16 | 119.8 |
C4—C3—S1 | 121.3 (3) | C17—C16—H16 | 119.8 |
C3—C4—C5 | 120.6 (3) | C12—C17—C16 | 122.3 (3) |
C3—C4—H4 | 119.7 | C12—C17—H17 | 118.9 |
C5—C4—H4 | 119.7 | C16—C17—H17 | 118.9 |
C6—C5—C4 | 121.4 (3) | S1—C18A—H18A | 109.5 |
C6—C5—H5 | 119.3 | S1—C18A—H18B | 109.5 |
C4—C5—H5 | 119.3 | H18A—C18A—H18B | 109.5 |
C1—C6—C5 | 117.0 (3) | S1—C18A—H18C | 109.5 |
C1—C6—C7 | 119.8 (3) | H18A—C18A—H18C | 109.5 |
C5—C6—C7 | 123.2 (3) | H18B—C18A—H18C | 109.5 |
C8—C7—C6 | 127.0 (3) | S1—C18B—H18D | 109.5 |
C8—C7—H7 | 116.5 | S1—C18B—H18E | 109.5 |
C6—C7—H7 | 116.5 | H18D—C18B—H18E | 109.5 |
C7—C8—C9 | 126.8 (3) | S1—C18B—H18F | 109.5 |
C7—C8—H8 | 116.6 | H18D—C18B—H18F | 109.5 |
C9—C8—H8 | 116.6 | H18E—C18B—H18F | 109.5 |
O1—C9—C8 | 118.4 (3) | S2—C19A—H19A | 109.5 |
O1—C9—C10 | 120.1 (3) | S2—C19A—H19B | 109.5 |
C8—C9—C10 | 121.5 (3) | H19A—C19A—H19B | 109.5 |
C11—C10—C9 | 112.9 (3) | S2—C19A—H19C | 109.5 |
C11—C10—H10A | 109.0 | H19A—C19A—H19C | 109.5 |
C9—C10—H10A | 109.0 | H19B—C19A—H19C | 109.5 |
C11—C10—H10B | 109.0 | S2—C19B—H19D | 109.5 |
C9—C10—H10B | 109.0 | S2—C19B—H19E | 109.5 |
H10A—C10—H10B | 107.8 | H19D—C19B—H19E | 109.5 |
N1—C11—C10 | 108.7 (2) | S2—C19B—H19F | 109.5 |
N1—C11—C12 | 113.4 (3) | H19D—C19B—H19F | 109.5 |
C10—C11—C12 | 113.5 (3) | H19E—C19B—H19F | 109.5 |
N1—C11—H11 | 106.9 | C11—N1—H1A | 109.0 |
C10—C11—H11 | 106.9 | C11—N1—H1B | 108.9 |
C12—C11—H11 | 106.9 | H1A—N1—H1B | 109.5 |
C17—C12—C13 | 116.9 (3) | C18A—S1—C18B | 140.2 (5) |
C17—C12—C11 | 123.0 (3) | C18A—S1—C3 | 107.5 (3) |
C13—C12—C11 | 120.1 (3) | C18B—S1—C3 | 108.2 (3) |
C12—C13—C14 | 121.7 (3) | C19B—S2—C19A | 135.9 (5) |
C12—C13—H13 | 119.2 | C19B—S2—C15 | 112.9 (5) |
C14—C13—H13 | 119.2 | C19A—S2—C15 | 106.8 (2) |
C6—C1—C2—C3 | 0.9 (6) | N1—C11—C12—C13 | −139.8 (3) |
C1—C2—C3—C4 | −0.7 (6) | C10—C11—C12—C13 | 95.4 (4) |
C1—C2—C3—S1 | 178.6 (3) | C17—C12—C13—C14 | −2.3 (5) |
C2—C3—C4—C5 | 0.5 (5) | C11—C12—C13—C14 | 178.3 (3) |
S1—C3—C4—C5 | −178.8 (3) | C12—C13—C14—C15 | 0.9 (5) |
C3—C4—C5—C6 | −0.5 (5) | C13—C14—C15—C16 | 0.7 (5) |
C2—C1—C6—C5 | −0.9 (5) | C13—C14—C15—S2 | −178.4 (3) |
C2—C1—C6—C7 | 179.0 (4) | C14—C15—C16—C17 | −0.7 (5) |
C4—C5—C6—C1 | 0.6 (5) | S2—C15—C16—C17 | 178.4 (3) |
C4—C5—C6—C7 | −179.3 (3) | C13—C12—C17—C16 | 2.3 (5) |
C1—C6—C7—C8 | −166.6 (4) | C11—C12—C17—C16 | −178.3 (3) |
C5—C6—C7—C8 | 13.3 (5) | C15—C16—C17—C12 | −0.8 (5) |
C6—C7—C8—C9 | 175.8 (3) | C2—C3—S1—C18A | 175.8 (5) |
C7—C8—C9—O1 | −161.0 (4) | C4—C3—S1—C18A | −4.9 (6) |
C7—C8—C9—C10 | 20.7 (5) | C2—C3—S1—C18B | 13.6 (5) |
O1—C9—C10—C11 | 38.2 (4) | C4—C3—S1—C18B | −167.1 (5) |
C8—C9—C10—C11 | −143.5 (3) | C14—C15—S2—C19B | 11.9 (7) |
C9—C10—C11—N1 | 65.4 (3) | C16—C15—S2—C19B | −167.2 (7) |
C9—C10—C11—C12 | −167.4 (3) | C14—C15—S2—C19A | 172.4 (3) |
N1—C11—C12—C17 | 40.8 (4) | C16—C15—S2—C19A | −6.7 (4) |
C10—C11—C12—C17 | −84.0 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···N1i | 0.89 | 2.22 | 3.0981 (19) | 167 |
Symmetry code: (i) −x+1, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C19H21NOS2 |
Mr | 343.49 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 295 |
a, b, c (Å) | 16.705 (3), 5.5968 (10), 37.730 (7) |
V (Å3) | 3527.5 (11) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.31 |
Crystal size (mm) | 0.40 × 0.20 × 0.05 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 1999) |
Tmin, Tmax | 0.888, 0.986 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17587, 3278, 1465 |
Rint | 0.073 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.149, 0.91 |
No. of reflections | 3278 |
No. of parameters | 232 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.23, −0.29 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SAINT, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEP-3 (Farrugia, 1997), SHELXL97.
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···N1i | 0.89 | 2.22 | 3.0981 (19) | 167 |
Symmetry code: (i) −x+1, y+1/2, −z+1/2. |
As part of our ongoing studies Butcher, Yathirajan, Sarojini, Narayana & Indira, 2006; Butcher, Yathirajan, Sarojini, Narayana & Vijaya Raj, 2006; Harrison et al., 2006) of the syntheses and structures of chalcone derivatives, the title compound, (I), (Fig. 1) is described here. It arose as an unexpected product from an attempt to prepare the symmetric methylthio-substituted bis-chalcone 1,5-di(4-methylthiophenyl)penta-1,4-dien-3-one.
The dihedral angle between the mean planes of the aromatic rings in (I) is 31.87 (14)°. The molecule of (I) is chiral. In the arbitrarily chose asymmetric molecule, C11 has R configuration, but crystal symmetry generates a racemic mixture.
In the crystal, adjacent molecules of (I) interact by way of N—H···N hydrogen bonds (Table 1) to result in C(2) chains (Etter, 1990) propagating in [010] (Fig. 2).