organic compounds
N-(3-Methylphenyl)pyrimidin-2-amine
aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: edward.tiekink@gmail.com
Two independent molecules comprise the 11H11N3. These differ in terms of the relative orientations of the aromatic rings: the first is somewhat twisted, while the second is approximately planar [dihedral angles between the pyrimidine and phenyl rings = 39.00 (8) and 4.59 (11)°]. The molecules also form distinct patterns in their hydrogen bonding. The first independent molecule forms centrosymmetric dimers featuring an eight-membered {HNCN}2 synthon. The second independent molecule forms an N—H⋯N hydrogen bond with the other pyrimidine N atom of the first molecule. Thereby, tetrameric aggregates are formed. These associate via C—H⋯N and C—H⋯π interactions, consolidating the crystal packing.
in the title compound, CRelated literature
For background to the fluorescence properties of compounds related to the title compound, see: Kawai et al. (2001); Abdullah (2005). For the structures of related pyrimidine amine derivatives, see: Badaruddin et al. (2009); Fairuz et al. (2010).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997), DIAMOND (Brandenburg, 2006) and Qmol (Gans & Shalloway, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536810033301/bt5328sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810033301/bt5328Isup2.hkl
2-Chloropyrimidine (3.1701 g, 30 mmol) was mixed with 3-methylaniline (3 ml, 30 mmol) along with several drops of ethanol. The mixture was heated at 423–433 K for 5 h. The organic phase was dried over sodium sulfate; the evaporation of the solvent gave the colourless crystals.
Carbon-bound H-atoms were placed in calculated positions (C—H 0.93 to 0.96 Å) and were included in the
in the riding model approximation, with Uiso(H) set to 1.2 to 1.5Uequiv(C). The N-bound H-atoms were located in a difference Fourier map and were were refined with a distance restraint of N–H = 0.86±0.01 Å, and with Uiso(H) = 1.2Ueq(N).The title compound, (I), was investigated as a continuation of structural studies of pyrimidine derivatives related to the title compound (Badaruddin et al., 2009; Fairuz et al., 2010). Interest in these compounds relates to the fluorescence properties of related compounds (Kawai et al. 2001; Abdullah, 2005).
Two independent molecules of comprise the
of (I), Figs 1 and 2. Whereas the pyrimidine and amine residues are super-imposable in the two molecules, there is a large difference in the relative orientations of the tolyl groups, Fig. 3. This is seen in the marked difference in the dihedral angles formed between the pyrimidine and benzene rings of 39.00 (8) ° for the first independent molecule and 4.59 (11) ° for the second. Hence, while the first molecule is significantly twisted about the N3–C5 bond [the C1–N3–C5–C6 torsion angle = 37.2 (3) °], the second molecule is essentially planar [r.m.s. deviation of the 14 non-hydrogen atoms = 0.046 Å; the equivalent C12–N6–C16–C17 torsion angle is 1.1 (3) °]. It is noted that each of the N2 and N4 atoms forms a significant intramolecular C–H···N contact and that the contact formed in the second independent molecule is significantly shorter, Table 1.Over and above the conformational differences between the independent molecules, they form quite distinct patterns in their intermolecular contacts. Thus, centrosymmetrically related molecules of the first independent species associate via an eight-membered {···HNCN}2 synthon, Table 1. The pyrimdine atom not participating in this synthon accepts an N–H hydrogen bond from the second independent molecule. In this way, tetrameric supramolecular aggregates are formed, Fig. 4. Therefore, while each of the nitrogen atoms of the first independent molecule participates in intermolecular interactions, only the amine-nitrogen of the second molecule forms a significant intermolecular interaction. The tetrameric aggregates are consolidated into the three-dimensional structure by C–H···π interactions, Fig. 5 and Table 1.
For background to the fluorescence properties of compounds related to the title compound, see: Kawai et al. (2001); Abdullah (2005). For the structures of related pyrimidine amine derivatives, see: Badaruddin et al. (2009); Fairuz et al. (2010).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997), DIAMOND (Brandenburg, 2006) and Qmol (Gans & Shalloway, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The molecular structure of the first independent molecule in (I) showing the atom-labelling scheme and displacement ellipsoids at the 50% probability level. | |
Fig. 2. The molecular structure of the second independent molecule in (I) showing the atom-labelling scheme and displacement ellipsoids at the 50% probability level. | |
Fig. 3. Overlay diagram of the first independent molecule (shown in red) and the second independent molecule (shown in blue). | |
Fig. 4. Supramolecular tetrameric aggregate in (I) mediated by N–H···N hydrogen bonding, shown as orange dashed lines. | |
Fig. 5. Unit-cell contents for (I) shown in projection down the a axis. The N–H···N hydrogen bonding and C–H···π contacts are shown as orange and purple dashed lines, respectively. |
C11H11N3 | Z = 4 |
Mr = 185.23 | F(000) = 392 |
Triclinic, P1 | Dx = 1.235 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.4461 (10) Å | Cell parameters from 2493 reflections |
b = 10.0946 (11) Å | θ = 4.4–24.7° |
c = 11.6266 (13) Å | µ = 0.08 mm−1 |
α = 80.401 (1)° | T = 293 K |
β = 82.745 (2)° | Block, colourless |
γ = 66.005 (1)° | 0.20 × 0.20 × 0.10 mm |
V = 996.55 (19) Å3 |
Bruker SMART APEX diffractometer | 2881 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.035 |
Graphite monochromator | θmax = 27.5°, θmin = 1.8° |
ω scans | h = −11→12 |
9569 measured reflections | k = −12→13 |
4539 independent reflections | l = −15→15 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.051 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.167 | w = 1/[σ2(Fo2) + (0.0942P)2 + 0.0196P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max = 0.001 |
4539 reflections | Δρmax = 0.24 e Å−3 |
264 parameters | Δρmin = −0.22 e Å−3 |
2 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.016 (4) |
C11H11N3 | γ = 66.005 (1)° |
Mr = 185.23 | V = 996.55 (19) Å3 |
Triclinic, P1 | Z = 4 |
a = 9.4461 (10) Å | Mo Kα radiation |
b = 10.0946 (11) Å | µ = 0.08 mm−1 |
c = 11.6266 (13) Å | T = 293 K |
α = 80.401 (1)° | 0.20 × 0.20 × 0.10 mm |
β = 82.745 (2)° |
Bruker SMART APEX diffractometer | 2881 reflections with I > 2σ(I) |
9569 measured reflections | Rint = 0.035 |
4539 independent reflections |
R[F2 > 2σ(F2)] = 0.051 | 2 restraints |
wR(F2) = 0.167 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | Δρmax = 0.24 e Å−3 |
4539 reflections | Δρmin = −0.22 e Å−3 |
264 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 | ||
N1 | 0.78783 (16) | 0.67552 (15) | 0.14005 (12) | 0.0480 (4) | |
N2 | 0.71434 (16) | 0.88285 (15) | −0.00792 (12) | 0.0511 (4) | |
N3 | 0.53298 (16) | 0.84550 (16) | 0.12674 (12) | 0.0499 (4) | |
H3 | 0.4675 (17) | 0.9178 (15) | 0.0846 (14) | 0.055 (5)* | |
N4 | 1.05919 (19) | 0.15235 (17) | 0.35892 (15) | 0.0635 (4) | |
N5 | 1.0388 (2) | 0.39503 (18) | 0.35802 (17) | 0.0721 (5) | |
N6 | 0.84789 (17) | 0.35680 (16) | 0.28605 (12) | 0.0482 (4) | |
H6 | 0.810 (2) | 0.4518 (10) | 0.2708 (16) | 0.060 (6)* | |
C1 | 0.68337 (19) | 0.79917 (17) | 0.08648 (13) | 0.0425 (4) | |
C2 | 0.9333 (2) | 0.6381 (2) | 0.09545 (16) | 0.0556 (5) | |
H2 | 1.0093 | 0.5542 | 0.1308 | 0.067* | |
C3 | 0.9782 (2) | 0.7156 (2) | 0.00069 (17) | 0.0624 (5) | |
H3A | 1.0811 | 0.6871 | −0.0285 | 0.075* | |
C4 | 0.8615 (2) | 0.8385 (2) | −0.04876 (16) | 0.0574 (5) | |
H4 | 0.8872 | 0.8931 | −0.1142 | 0.069* | |
C5 | 0.46706 (18) | 0.78759 (16) | 0.22835 (14) | 0.0425 (4) | |
C6 | 0.5414 (2) | 0.73374 (18) | 0.33221 (14) | 0.0485 (4) | |
H6A | 0.6400 | 0.7313 | 0.3370 | 0.058* | |
C7 | 0.4663 (2) | 0.6841 (2) | 0.42779 (15) | 0.0574 (5) | |
H7 | 0.5158 | 0.6464 | 0.4973 | 0.069* | |
C8 | 0.3197 (2) | 0.6892 (2) | 0.42267 (16) | 0.0580 (5) | |
H8 | 0.2718 | 0.6544 | 0.4885 | 0.070* | |
C9 | 0.2421 (2) | 0.74531 (17) | 0.32074 (15) | 0.0494 (4) | |
C10 | 0.31905 (19) | 0.79320 (17) | 0.22345 (15) | 0.0458 (4) | |
H10 | 0.2700 | 0.8297 | 0.1537 | 0.055* | |
C11 | 0.0801 (2) | 0.7550 (2) | 0.3143 (2) | 0.0685 (6) | |
H11A | 0.0143 | 0.8042 | 0.3771 | 0.103* | |
H11B | 0.0818 | 0.6583 | 0.3207 | 0.103* | |
H11C | 0.0408 | 0.8086 | 0.2409 | 0.103* | |
C12 | 0.9877 (2) | 0.29674 (18) | 0.33629 (14) | 0.0464 (4) | |
C13 | 1.1733 (3) | 0.3396 (3) | 0.4079 (2) | 0.0846 (7) | |
H13 | 1.2123 | 0.4041 | 0.4260 | 0.102* | |
C14 | 1.2576 (2) | 0.1932 (3) | 0.4342 (2) | 0.0733 (6) | |
H14 | 1.3522 | 0.1572 | 0.4682 | 0.088* | |
C15 | 1.1951 (2) | 0.1040 (2) | 0.4078 (2) | 0.0715 (6) | |
H15 | 1.2494 | 0.0036 | 0.4245 | 0.086* | |
C16 | 0.75431 (19) | 0.29091 (18) | 0.25653 (14) | 0.0444 (4) | |
C17 | 0.7885 (3) | 0.1426 (2) | 0.2762 (2) | 0.0712 (6) | |
H17 | 0.8790 | 0.0783 | 0.3110 | 0.085* | |
C18 | 0.6869 (3) | 0.0911 (2) | 0.2434 (3) | 0.0877 (8) | |
H18 | 0.7101 | −0.0087 | 0.2572 | 0.105* | |
C19 | 0.5535 (3) | 0.1820 (2) | 0.1916 (2) | 0.0752 (6) | |
H19 | 0.4879 | 0.1438 | 0.1696 | 0.090* | |
C20 | 0.5161 (2) | 0.3304 (2) | 0.17184 (17) | 0.0576 (5) | |
C21 | 0.6174 (2) | 0.38285 (19) | 0.20499 (15) | 0.0511 (4) | |
H21 | 0.5930 | 0.4829 | 0.1923 | 0.061* | |
C22 | 0.3675 (3) | 0.4331 (3) | 0.1169 (2) | 0.0877 (8) | |
H22A | 0.2841 | 0.4052 | 0.1508 | 0.132* | |
H22B | 0.3793 | 0.4284 | 0.0343 | 0.132* | |
H22C | 0.3446 | 0.5312 | 0.1307 | 0.132* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0448 (8) | 0.0418 (8) | 0.0489 (8) | −0.0109 (6) | −0.0080 (6) | 0.0043 (6) |
N2 | 0.0493 (9) | 0.0483 (8) | 0.0462 (8) | −0.0143 (7) | −0.0032 (6) | 0.0064 (6) |
N3 | 0.0418 (8) | 0.0474 (8) | 0.0475 (8) | −0.0107 (7) | −0.0077 (6) | 0.0143 (6) |
N4 | 0.0607 (10) | 0.0478 (9) | 0.0775 (11) | −0.0105 (8) | −0.0246 (8) | −0.0092 (8) |
N5 | 0.0761 (12) | 0.0559 (10) | 0.0930 (13) | −0.0330 (9) | −0.0399 (10) | 0.0119 (9) |
N6 | 0.0512 (8) | 0.0402 (8) | 0.0525 (8) | −0.0177 (7) | −0.0127 (7) | 0.0020 (6) |
C1 | 0.0456 (9) | 0.0385 (8) | 0.0404 (8) | −0.0144 (7) | −0.0086 (7) | 0.0015 (6) |
C2 | 0.0466 (10) | 0.0502 (10) | 0.0570 (11) | −0.0077 (8) | −0.0090 (8) | 0.0016 (8) |
C3 | 0.0473 (10) | 0.0673 (12) | 0.0577 (11) | −0.0125 (9) | 0.0037 (8) | −0.0002 (9) |
C4 | 0.0563 (11) | 0.0601 (11) | 0.0470 (10) | −0.0200 (9) | 0.0022 (8) | 0.0042 (8) |
C5 | 0.0454 (9) | 0.0329 (8) | 0.0435 (8) | −0.0112 (7) | −0.0037 (7) | 0.0006 (6) |
C6 | 0.0511 (10) | 0.0465 (9) | 0.0459 (9) | −0.0178 (8) | −0.0091 (7) | 0.0002 (7) |
C7 | 0.0656 (12) | 0.0569 (11) | 0.0439 (9) | −0.0205 (9) | −0.0103 (8) | 0.0045 (8) |
C8 | 0.0694 (13) | 0.0531 (11) | 0.0475 (10) | −0.0263 (10) | 0.0060 (9) | 0.0025 (8) |
C9 | 0.0498 (10) | 0.0371 (9) | 0.0579 (10) | −0.0154 (8) | 0.0013 (8) | −0.0055 (7) |
C10 | 0.0477 (10) | 0.0379 (9) | 0.0472 (9) | −0.0132 (7) | −0.0069 (7) | −0.0002 (7) |
C11 | 0.0579 (12) | 0.0648 (13) | 0.0832 (14) | −0.0285 (10) | 0.0022 (10) | −0.0046 (11) |
C12 | 0.0487 (10) | 0.0473 (10) | 0.0418 (8) | −0.0184 (8) | −0.0072 (7) | 0.0003 (7) |
C13 | 0.0835 (16) | 0.0721 (15) | 0.1102 (19) | −0.0391 (13) | −0.0499 (14) | 0.0114 (13) |
C14 | 0.0601 (13) | 0.0768 (15) | 0.0808 (14) | −0.0206 (11) | −0.0286 (11) | −0.0028 (11) |
C15 | 0.0639 (13) | 0.0549 (12) | 0.0852 (15) | −0.0046 (10) | −0.0276 (11) | −0.0132 (10) |
C16 | 0.0460 (9) | 0.0450 (9) | 0.0418 (8) | −0.0181 (8) | −0.0038 (7) | −0.0031 (7) |
C17 | 0.0688 (13) | 0.0477 (11) | 0.1000 (16) | −0.0234 (10) | −0.0330 (12) | 0.0043 (11) |
C18 | 0.0877 (16) | 0.0487 (12) | 0.137 (2) | −0.0316 (12) | −0.0446 (15) | 0.0017 (13) |
C19 | 0.0666 (13) | 0.0669 (14) | 0.1044 (18) | −0.0318 (11) | −0.0199 (12) | −0.0187 (12) |
C20 | 0.0494 (10) | 0.0616 (12) | 0.0615 (11) | −0.0174 (9) | −0.0082 (8) | −0.0150 (9) |
C21 | 0.0509 (10) | 0.0442 (9) | 0.0555 (10) | −0.0140 (8) | −0.0091 (8) | −0.0072 (8) |
C22 | 0.0640 (14) | 0.0809 (16) | 0.117 (2) | −0.0156 (12) | −0.0360 (13) | −0.0204 (14) |
N1—C2 | 1.328 (2) | C8—H8 | 0.9300 |
N1—C1 | 1.347 (2) | C9—C10 | 1.392 (2) |
N2—C4 | 1.325 (2) | C9—C11 | 1.504 (3) |
N2—C1 | 1.3470 (19) | C10—H10 | 0.9300 |
N3—C1 | 1.349 (2) | C11—H11A | 0.9600 |
N3—C5 | 1.416 (2) | C11—H11B | 0.9600 |
N3—H3 | 0.863 (9) | C11—H11C | 0.9600 |
N4—C12 | 1.329 (2) | C13—C14 | 1.365 (3) |
N4—C15 | 1.339 (2) | C13—H13 | 0.9300 |
N5—C13 | 1.328 (3) | C14—C15 | 1.351 (3) |
N5—C12 | 1.336 (2) | C14—H14 | 0.9300 |
N6—C12 | 1.371 (2) | C15—H15 | 0.9300 |
N6—C16 | 1.404 (2) | C16—C17 | 1.381 (2) |
N6—H6 | 0.872 (9) | C16—C21 | 1.388 (2) |
C2—C3 | 1.367 (2) | C17—C18 | 1.378 (3) |
C2—H2 | 0.9300 | C17—H17 | 0.9300 |
C3—C4 | 1.376 (3) | C18—C19 | 1.364 (3) |
C3—H3A | 0.9300 | C18—H18 | 0.9300 |
C4—H4 | 0.9300 | C19—C20 | 1.378 (3) |
C5—C10 | 1.384 (2) | C19—H19 | 0.9300 |
C5—C6 | 1.390 (2) | C20—C21 | 1.385 (2) |
C6—C7 | 1.376 (2) | C20—C22 | 1.508 (3) |
C6—H6A | 0.9300 | C21—H21 | 0.9300 |
C7—C8 | 1.374 (3) | C22—H22A | 0.9600 |
C7—H7 | 0.9300 | C22—H22B | 0.9600 |
C8—C9 | 1.386 (3) | C22—H22C | 0.9600 |
C2—N1—C1 | 115.41 (14) | C9—C11—H11B | 109.5 |
C4—N2—C1 | 115.85 (14) | H11A—C11—H11B | 109.5 |
C1—N3—C5 | 128.18 (13) | C9—C11—H11C | 109.5 |
C1—N3—H3 | 116.6 (12) | H11A—C11—H11C | 109.5 |
C5—N3—H3 | 115.1 (12) | H11B—C11—H11C | 109.5 |
C12—N4—C15 | 115.44 (18) | N4—C12—N5 | 126.19 (16) |
C13—N5—C12 | 115.19 (17) | N4—C12—N6 | 119.78 (16) |
C12—N6—C16 | 130.75 (14) | N5—C12—N6 | 114.03 (15) |
C12—N6—H6 | 114.5 (13) | N5—C13—C14 | 123.7 (2) |
C16—N6—H6 | 114.7 (13) | N5—C13—H13 | 118.1 |
N1—C1—N2 | 125.62 (15) | C14—C13—H13 | 118.1 |
N1—C1—N3 | 119.24 (14) | C15—C14—C13 | 115.9 (2) |
N2—C1—N3 | 115.13 (14) | C15—C14—H14 | 122.0 |
N1—C2—C3 | 123.91 (16) | C13—C14—H14 | 122.0 |
N1—C2—H2 | 118.0 | N4—C15—C14 | 123.5 (2) |
C3—C2—H2 | 118.0 | N4—C15—H15 | 118.3 |
C2—C3—C4 | 115.81 (17) | C14—C15—H15 | 118.3 |
C2—C3—H3A | 122.1 | C17—C16—C21 | 118.40 (16) |
C4—C3—H3A | 122.1 | C17—C16—N6 | 124.64 (16) |
N2—C4—C3 | 123.38 (16) | C21—C16—N6 | 116.96 (15) |
N2—C4—H4 | 118.3 | C18—C17—C16 | 119.19 (19) |
C3—C4—H4 | 118.3 | C18—C17—H17 | 120.4 |
C10—C5—C6 | 119.87 (15) | C16—C17—H17 | 120.4 |
C10—C5—N3 | 117.36 (14) | C19—C18—C17 | 122.1 (2) |
C6—C5—N3 | 122.68 (15) | C19—C18—H18 | 119.0 |
C7—C6—C5 | 118.69 (16) | C17—C18—H18 | 119.0 |
C7—C6—H6A | 120.7 | C18—C19—C20 | 119.86 (19) |
C5—C6—H6A | 120.7 | C18—C19—H19 | 120.1 |
C8—C7—C6 | 121.37 (17) | C20—C19—H19 | 120.1 |
C8—C7—H7 | 119.3 | C19—C20—C21 | 118.31 (18) |
C6—C7—H7 | 119.3 | C19—C20—C22 | 120.71 (18) |
C7—C8—C9 | 120.87 (16) | C21—C20—C22 | 120.98 (18) |
C7—C8—H8 | 119.6 | C20—C21—C16 | 122.16 (17) |
C9—C8—H8 | 119.6 | C20—C21—H21 | 118.9 |
C8—C9—C10 | 117.80 (16) | C16—C21—H21 | 118.9 |
C8—C9—C11 | 121.64 (16) | C20—C22—H22A | 109.5 |
C10—C9—C11 | 120.56 (17) | C20—C22—H22B | 109.5 |
C5—C10—C9 | 121.37 (16) | H22A—C22—H22B | 109.5 |
C5—C10—H10 | 119.3 | C20—C22—H22C | 109.5 |
C9—C10—H10 | 119.3 | H22A—C22—H22C | 109.5 |
C9—C11—H11A | 109.5 | H22B—C22—H22C | 109.5 |
C2—N1—C1—N2 | 1.8 (3) | C15—N4—C12—N5 | −0.2 (3) |
C2—N1—C1—N3 | −179.59 (15) | C15—N4—C12—N6 | 179.91 (17) |
C4—N2—C1—N1 | −1.1 (3) | C13—N5—C12—N4 | −0.6 (3) |
C4—N2—C1—N3 | −179.76 (15) | C13—N5—C12—N6 | 179.29 (19) |
C5—N3—C1—N1 | 6.3 (3) | C16—N6—C12—N4 | 3.7 (3) |
C5—N3—C1—N2 | −174.88 (16) | C16—N6—C12—N5 | −176.17 (17) |
C1—N1—C2—C3 | −1.0 (3) | C12—N5—C13—C14 | 1.2 (4) |
N1—C2—C3—C4 | −0.3 (3) | N5—C13—C14—C15 | −0.9 (4) |
C1—N2—C4—C3 | −0.4 (3) | C12—N4—C15—C14 | 0.5 (3) |
C2—C3—C4—N2 | 1.1 (3) | C13—C14—C15—N4 | 0.0 (4) |
C1—N3—C5—C10 | −146.27 (17) | C12—N6—C16—C17 | 1.1 (3) |
C1—N3—C5—C6 | 37.2 (3) | C12—N6—C16—C21 | −179.49 (16) |
C10—C5—C6—C7 | 1.3 (2) | C21—C16—C17—C18 | 0.4 (3) |
N3—C5—C6—C7 | 177.79 (16) | N6—C16—C17—C18 | 179.8 (2) |
C5—C6—C7—C8 | −1.0 (3) | C16—C17—C18—C19 | 0.3 (4) |
C6—C7—C8—C9 | −0.3 (3) | C17—C18—C19—C20 | −0.8 (4) |
C7—C8—C9—C10 | 1.4 (3) | C18—C19—C20—C21 | 0.5 (3) |
C7—C8—C9—C11 | −178.53 (18) | C18—C19—C20—C22 | −178.7 (2) |
C6—C5—C10—C9 | −0.2 (2) | C19—C20—C21—C16 | 0.3 (3) |
N3—C5—C10—C9 | −176.90 (15) | C22—C20—C21—C16 | 179.48 (19) |
C8—C9—C10—C5 | −1.1 (2) | C17—C16—C21—C20 | −0.7 (3) |
C11—C9—C10—C5 | 178.82 (16) | N6—C16—C21—C20 | 179.82 (16) |
Cg1 and Cg2 are the centroids of the N4,N5,C12–C15 and C5–C10 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···N2i | 0.86 (1) | 2.19 (1) | 3.0377 (19) | 170 (2) |
N6—H6···N1 | 0.87 (1) | 2.45 (1) | 3.2391 (19) | 151 (2) |
C6—H6a···N1 | 0.93 | 2.55 | 2.961 (2) | 107 |
C17—H17···N4 | 0.93 | 2.28 | 2.886 (3) | 123 |
C11—H11a···Cg1ii | 0.96 | 2.96 | 3.766 (2) | 143 |
C15—H15···Cg2iii | 0.93 | 2.82 | 3.620 (2) | 144 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+1, −z+1; (iii) x+1, y−1, z. |
Experimental details
Crystal data | |
Chemical formula | C11H11N3 |
Mr | 185.23 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 9.4461 (10), 10.0946 (11), 11.6266 (13) |
α, β, γ (°) | 80.401 (1), 82.745 (2), 66.005 (1) |
V (Å3) | 996.55 (19) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.20 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART APEX diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9569, 4539, 2881 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.167, 1.02 |
No. of reflections | 4539 |
No. of parameters | 264 |
No. of restraints | 2 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.24, −0.22 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), DIAMOND (Brandenburg, 2006) and Qmol (Gans & Shalloway, 2001), publCIF (Westrip, 2010).
Cg1 and Cg2 are the centroids of the N4,N5,C12–C15 and C5–C10 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···N2i | 0.863 (9) | 2.185 (10) | 3.0377 (19) | 169.6 (17) |
N6—H6···N1 | 0.872 (9) | 2.449 (12) | 3.2391 (19) | 150.9 (17) |
C6—H6a···N1 | 0.93 | 2.55 | 2.961 (2) | 107 |
C17—H17···N4 | 0.93 | 2.28 | 2.886 (3) | 123 |
C11—H11a···Cg1ii | 0.96 | 2.96 | 3.766 (2) | 143 |
C15—H15···Cg2iii | 0.93 | 2.82 | 3.620 (2) | 144 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+1, −z+1; (iii) x+1, y−1, z. |
Footnotes
‡Additional correspondence author, e-mail: zana@um.edu.my.
Acknowledgements
Z. Abdullah thanks the Ministry of Higher Education, Malaysia, for a research grant (FS143/2008 C). The authors are also grateful to the University of Malaya for support of the crystallographic facility.
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, (I), was investigated as a continuation of structural studies of pyrimidine derivatives related to the title compound (Badaruddin et al., 2009; Fairuz et al., 2010). Interest in these compounds relates to the fluorescence properties of related compounds (Kawai et al. 2001; Abdullah, 2005).
Two independent molecules of comprise the asymmetric unit of (I), Figs 1 and 2. Whereas the pyrimidine and amine residues are super-imposable in the two molecules, there is a large difference in the relative orientations of the tolyl groups, Fig. 3. This is seen in the marked difference in the dihedral angles formed between the pyrimidine and benzene rings of 39.00 (8) ° for the first independent molecule and 4.59 (11) ° for the second. Hence, while the first molecule is significantly twisted about the N3–C5 bond [the C1–N3–C5–C6 torsion angle = 37.2 (3) °], the second molecule is essentially planar [r.m.s. deviation of the 14 non-hydrogen atoms = 0.046 Å; the equivalent C12–N6–C16–C17 torsion angle is 1.1 (3) °]. It is noted that each of the N2 and N4 atoms forms a significant intramolecular C–H···N contact and that the contact formed in the second independent molecule is significantly shorter, Table 1.
Over and above the conformational differences between the independent molecules, they form quite distinct patterns in their intermolecular contacts. Thus, centrosymmetrically related molecules of the first independent species associate via an eight-membered {···HNCN}2 synthon, Table 1. The pyrimdine atom not participating in this synthon accepts an N–H hydrogen bond from the second independent molecule. In this way, tetrameric supramolecular aggregates are formed, Fig. 4. Therefore, while each of the nitrogen atoms of the first independent molecule participates in intermolecular interactions, only the amine-nitrogen of the second molecule forms a significant intermolecular interaction. The tetrameric aggregates are consolidated into the three-dimensional structure by C–H···π interactions, Fig. 5 and Table 1.