organic compounds
4,6-Dimethoxy-2-(methylsulfanyl)pyrimidine–4-hydroxybenzoic acid (1/1)
aSchool of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Physics, Faculty of Science, University of Mazandaran, Babolsar, Iran, and cDepartment of Chemistry, Government Arts College, Thonthonimalai, Karur, Tamil Nadu, India
*Correspondence e-mail: arazaki@usm.my
The base molecule of the title 7H10N2O2S·C7H6O3, is essentially planar, with a maximum deviation of 0.0806 (14) Å for all non-H atoms. The acid molecule is also nearly planar, with a dihedral angle of 8.12 (14)° between the benzene ring and the carboxy group. In the crystal, the acid molecules form an inversion dimer through a pair of O—H⋯O hydrogen bonds with an R22(8) ring motif. The pyrimidine molecules are linked on both sides of the dimer into a heterotetramer via O—H⋯N and C—H⋯O hydrogen bonds with R22(8) ring motifs. The heterotetramers are further linked by weak C—H⋯O hydrogen bonds, forming a tape structure along [1-10].
CRelated literature
For general background to substituted pyrimidines, see: Hunt et al. (1980); Baker & Santi (1965); Holy et al. (1974). For 4-hydroxybenzoic acid, see: Vishweshwar et al. (2003). For related structures, see: Balasubramani & Fun (2009); Hemamalini & Fun (2010). For hydrogen-bond motifs, see: Bernstein et al. (1995). For bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
Experimental
Crystal data
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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: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536812046338/is5216sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812046338/is5216Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812046338/is5216Isup3.cml
Hot methanol solutions (20 ml) of 4,6-Dimethoxy-2-methylthiopyrimidine (46 mg, Aldrich) and 4-hydroxybenzoic acid (39 mg, Merck) were mixed and warmed over a heating magnetic stirrer hotplate for a few minutes. The resulting solution was allowed to cool slowly at room temperature and single crystals of the title compound (I) appeared after a few days.
O-bound H atoms were located in a difference Fourier maps. Atom H1O5 was refined freely, while atom H1O4 was refined with a bond length restraint O—H = 0.85 (1) Å [refined distances: O5—H1O5 = 0.79 (3) Å and O4—H1O4 = 0.862 (10) Å]. The remaining H atoms were positioned geometrically (C—H = 0.95 and 0.98 Å) and were refined using a riding model, with Uiso(H) = 1.2Ueq(C) or 1.5Ueq(methyl C). A rotating-group model was used for the methyl group. In the final
five outliers were omitted (-2 -6 2, -3 6 3, 4 -5 1, -3 5 1 and 3 6 0).Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).C7H10N2O2S·C7H6O3 | Z = 2 |
Mr = 324.35 | F(000) = 340 |
Triclinic, P1 | Dx = 1.436 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.9923 (5) Å | Cell parameters from 9952 reflections |
b = 10.2887 (8) Å | θ = 2.5–32.6° |
c = 10.7578 (8) Å | µ = 0.24 mm−1 |
α = 77.419 (2)° | T = 100 K |
β = 83.381 (2)° | Block, colourless |
γ = 89.209 (2)° | 0.44 × 0.37 × 0.23 mm |
V = 750.27 (10) Å3 |
Bruker SMART APEXII CCD area-detector diffractometer | 3393 independent reflections |
Radiation source: fine-focus sealed tube | 3105 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.024 |
ϕ and ω scans | θmax = 27.5°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −9→9 |
Tmin = 0.901, Tmax = 0.947 | k = −13→13 |
13682 measured reflections | l = −13→13 |
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)] = 0.032 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.093 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.10 | w = 1/[σ2(Fo2) + (0.0508P)2 + 0.2589P] where P = (Fo2 + 2Fc2)/3 |
3393 reflections | (Δ/σ)max = 0.001 |
210 parameters | Δρmax = 0.46 e Å−3 |
1 restraint | Δρmin = −0.27 e Å−3 |
C7H10N2O2S·C7H6O3 | γ = 89.209 (2)° |
Mr = 324.35 | V = 750.27 (10) Å3 |
Triclinic, P1 | Z = 2 |
a = 6.9923 (5) Å | Mo Kα radiation |
b = 10.2887 (8) Å | µ = 0.24 mm−1 |
c = 10.7578 (8) Å | T = 100 K |
α = 77.419 (2)° | 0.44 × 0.37 × 0.23 mm |
β = 83.381 (2)° |
Bruker SMART APEXII CCD area-detector diffractometer | 3393 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3105 reflections with I > 2σ(I) |
Tmin = 0.901, Tmax = 0.947 | Rint = 0.024 |
13682 measured reflections |
R[F2 > 2σ(F2)] = 0.032 | 1 restraint |
wR(F2) = 0.093 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.10 | Δρmax = 0.46 e Å−3 |
3393 reflections | Δρmin = −0.27 e Å−3 |
210 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | ||
S1 | 0.22119 (4) | 0.45956 (3) | 0.93029 (3) | 0.02129 (10) | |
O1 | 0.78663 (12) | 0.67424 (9) | 0.67045 (9) | 0.0237 (2) | |
O2 | 0.81296 (13) | 0.20863 (9) | 0.83750 (9) | 0.0261 (2) | |
O3 | 0.31596 (13) | 0.39971 (9) | 0.58570 (9) | 0.0251 (2) | |
O4 | 0.61173 (13) | 0.34673 (10) | 0.50895 (9) | 0.0272 (2) | |
O5 | 0.28845 (14) | −0.22653 (9) | 0.78692 (9) | 0.0260 (2) | |
N1 | 0.53552 (14) | 0.56189 (10) | 0.79118 (10) | 0.0195 (2) | |
N2 | 0.54001 (14) | 0.32727 (10) | 0.87876 (10) | 0.0199 (2) | |
C1 | 0.71747 (17) | 0.55457 (12) | 0.73576 (11) | 0.0197 (2) | |
C2 | 0.81861 (17) | 0.43673 (13) | 0.74714 (12) | 0.0214 (2) | |
H2A | 0.9460 | 0.4324 | 0.7067 | 0.026* | |
C3 | 0.71973 (17) | 0.32502 (13) | 0.82225 (11) | 0.0207 (2) | |
C4 | 0.45790 (16) | 0.44686 (12) | 0.85972 (11) | 0.0185 (2) | |
C5 | 0.7153 (2) | 0.09621 (13) | 0.92394 (13) | 0.0300 (3) | |
H5A | 0.8014 | 0.0196 | 0.9344 | 0.045* | |
H5B | 0.5998 | 0.0741 | 0.8888 | 0.045* | |
H5C | 0.6784 | 0.1185 | 1.0074 | 0.045* | |
C6 | 0.16623 (18) | 0.28891 (13) | 1.00996 (13) | 0.0261 (3) | |
H6A | 0.0352 | 0.2828 | 1.0546 | 0.039* | |
H6B | 0.2579 | 0.2581 | 1.0721 | 0.039* | |
H6C | 0.1756 | 0.2331 | 0.9464 | 0.039* | |
C7 | 0.98129 (18) | 0.67934 (14) | 0.60767 (13) | 0.0271 (3) | |
H7A | 1.0168 | 0.7718 | 0.5665 | 0.041* | |
H7B | 0.9897 | 0.6253 | 0.5427 | 0.041* | |
H7C | 1.0694 | 0.6444 | 0.6712 | 0.041* | |
C8 | 0.55397 (17) | 0.07913 (13) | 0.62423 (12) | 0.0219 (2) | |
H8A | 0.6798 | 0.1082 | 0.5862 | 0.026* | |
C9 | 0.51922 (17) | −0.05487 (13) | 0.67699 (12) | 0.0220 (2) | |
H9A | 0.6210 | −0.1170 | 0.6762 | 0.026* | |
C10 | 0.33342 (18) | −0.09825 (12) | 0.73148 (11) | 0.0213 (2) | |
C11 | 0.18445 (18) | −0.00551 (13) | 0.73189 (13) | 0.0266 (3) | |
H11A | 0.0576 | −0.0348 | 0.7674 | 0.032* | |
C12 | 0.22154 (18) | 0.12821 (13) | 0.68095 (12) | 0.0248 (3) | |
H12A | 0.1205 | 0.1906 | 0.6833 | 0.030* | |
C13 | 0.40666 (17) | 0.17230 (12) | 0.62604 (11) | 0.0199 (2) | |
C14 | 0.44409 (17) | 0.31494 (12) | 0.57134 (11) | 0.0201 (2) | |
H1O4 | 0.625 (4) | 0.4317 (11) | 0.482 (3) | 0.095 (10)* | |
H1O5 | 0.377 (3) | −0.275 (3) | 0.781 (2) | 0.063 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.01540 (15) | 0.01880 (17) | 0.02680 (17) | 0.00153 (11) | 0.00292 (11) | −0.00160 (12) |
O1 | 0.0193 (4) | 0.0201 (4) | 0.0286 (4) | −0.0013 (3) | 0.0057 (3) | −0.0024 (4) |
O2 | 0.0238 (4) | 0.0198 (5) | 0.0323 (5) | 0.0059 (4) | 0.0029 (4) | −0.0040 (4) |
O3 | 0.0258 (4) | 0.0179 (4) | 0.0298 (5) | 0.0025 (3) | 0.0014 (4) | −0.0040 (4) |
O4 | 0.0218 (4) | 0.0204 (5) | 0.0345 (5) | −0.0021 (4) | 0.0034 (4) | 0.0010 (4) |
O5 | 0.0235 (5) | 0.0152 (4) | 0.0350 (5) | 0.0010 (4) | 0.0047 (4) | −0.0008 (4) |
N1 | 0.0164 (4) | 0.0196 (5) | 0.0216 (5) | 0.0012 (4) | 0.0002 (4) | −0.0037 (4) |
N2 | 0.0174 (5) | 0.0196 (5) | 0.0223 (5) | 0.0013 (4) | −0.0004 (4) | −0.0049 (4) |
C1 | 0.0178 (5) | 0.0205 (6) | 0.0203 (5) | −0.0006 (4) | −0.0001 (4) | −0.0045 (4) |
C2 | 0.0169 (5) | 0.0228 (6) | 0.0240 (6) | 0.0019 (4) | 0.0014 (4) | −0.0061 (5) |
C3 | 0.0188 (5) | 0.0209 (6) | 0.0228 (5) | 0.0039 (4) | −0.0019 (4) | −0.0065 (5) |
C4 | 0.0166 (5) | 0.0198 (6) | 0.0193 (5) | 0.0004 (4) | −0.0015 (4) | −0.0050 (4) |
C5 | 0.0351 (7) | 0.0196 (6) | 0.0313 (7) | 0.0053 (5) | 0.0039 (5) | −0.0011 (5) |
C6 | 0.0207 (6) | 0.0216 (6) | 0.0325 (6) | −0.0009 (5) | 0.0041 (5) | −0.0019 (5) |
C7 | 0.0185 (6) | 0.0287 (7) | 0.0308 (7) | −0.0037 (5) | 0.0054 (5) | −0.0032 (5) |
C8 | 0.0193 (5) | 0.0202 (6) | 0.0247 (6) | 0.0005 (5) | 0.0009 (4) | −0.0037 (5) |
C9 | 0.0199 (6) | 0.0195 (6) | 0.0254 (6) | 0.0031 (4) | −0.0002 (4) | −0.0037 (5) |
C10 | 0.0237 (6) | 0.0173 (6) | 0.0212 (5) | 0.0002 (5) | 0.0009 (4) | −0.0023 (4) |
C11 | 0.0211 (6) | 0.0210 (6) | 0.0331 (7) | 0.0007 (5) | 0.0070 (5) | −0.0012 (5) |
C12 | 0.0228 (6) | 0.0198 (6) | 0.0288 (6) | 0.0037 (5) | 0.0043 (5) | −0.0027 (5) |
C13 | 0.0221 (6) | 0.0169 (6) | 0.0197 (5) | 0.0006 (4) | 0.0007 (4) | −0.0034 (4) |
C14 | 0.0217 (6) | 0.0185 (6) | 0.0195 (5) | 0.0004 (4) | −0.0012 (4) | −0.0037 (4) |
S1—C4 | 1.7552 (12) | C5—H5B | 0.9800 |
S1—C6 | 1.8034 (14) | C5—H5C | 0.9800 |
O1—C1 | 1.3434 (15) | C6—H6A | 0.9800 |
O1—C7 | 1.4444 (14) | C6—H6B | 0.9800 |
O2—C3 | 1.3429 (15) | C6—H6C | 0.9800 |
O2—C5 | 1.4406 (16) | C7—H7A | 0.9800 |
O3—C14 | 1.2619 (15) | C7—H7B | 0.9800 |
O4—C14 | 1.2904 (15) | C7—H7C | 0.9800 |
O4—H1O4 | 0.862 (10) | C8—C9 | 1.3851 (17) |
O5—C10 | 1.3497 (15) | C8—C13 | 1.3987 (17) |
O5—H1O5 | 0.79 (3) | C8—H8A | 0.9500 |
N1—C4 | 1.3358 (16) | C9—C10 | 1.3990 (17) |
N1—C1 | 1.3497 (15) | C9—H9A | 0.9500 |
N2—C3 | 1.3336 (15) | C10—C11 | 1.4032 (17) |
N2—C4 | 1.3354 (16) | C11—C12 | 1.3816 (18) |
C1—C2 | 1.3845 (17) | C11—H11A | 0.9500 |
C2—C3 | 1.3930 (17) | C12—C13 | 1.3977 (17) |
C2—H2A | 0.9500 | C12—H12A | 0.9500 |
C5—H5A | 0.9800 | C13—C14 | 1.4722 (17) |
C4—S1—C6 | 101.55 (6) | H6A—C6—H6C | 109.5 |
C1—O1—C7 | 117.10 (10) | H6B—C6—H6C | 109.5 |
C3—O2—C5 | 116.61 (10) | O1—C7—H7A | 109.5 |
C14—O4—H1O4 | 112 (2) | O1—C7—H7B | 109.5 |
C10—O5—H1O5 | 112.7 (18) | H7A—C7—H7B | 109.5 |
C4—N1—C1 | 115.43 (10) | O1—C7—H7C | 109.5 |
C3—N2—C4 | 115.10 (11) | H7A—C7—H7C | 109.5 |
O1—C1—N1 | 111.95 (10) | H7B—C7—H7C | 109.5 |
O1—C1—C2 | 124.93 (11) | C9—C8—C13 | 121.05 (11) |
N1—C1—C2 | 123.11 (11) | C9—C8—H8A | 119.5 |
C1—C2—C3 | 115.03 (11) | C13—C8—H8A | 119.5 |
C1—C2—H2A | 122.5 | C8—C9—C10 | 119.61 (11) |
C3—C2—H2A | 122.5 | C8—C9—H9A | 120.2 |
N2—C3—O2 | 118.77 (11) | C10—C9—H9A | 120.2 |
N2—C3—C2 | 124.02 (11) | O5—C10—C9 | 123.27 (11) |
O2—C3—C2 | 117.20 (11) | O5—C10—C11 | 117.12 (11) |
N2—C4—N1 | 127.30 (11) | C9—C10—C11 | 119.60 (11) |
N2—C4—S1 | 118.35 (9) | C12—C11—C10 | 120.27 (12) |
N1—C4—S1 | 114.35 (9) | C12—C11—H11A | 119.9 |
O2—C5—H5A | 109.5 | C10—C11—H11A | 119.9 |
O2—C5—H5B | 109.5 | C11—C12—C13 | 120.47 (12) |
H5A—C5—H5B | 109.5 | C11—C12—H12A | 119.8 |
O2—C5—H5C | 109.5 | C13—C12—H12A | 119.8 |
H5A—C5—H5C | 109.5 | C12—C13—C8 | 118.99 (11) |
H5B—C5—H5C | 109.5 | C12—C13—C14 | 119.95 (11) |
S1—C6—H6A | 109.5 | C8—C13—C14 | 121.05 (11) |
S1—C6—H6B | 109.5 | O3—C14—O4 | 122.92 (12) |
H6A—C6—H6B | 109.5 | O3—C14—C13 | 120.49 (11) |
S1—C6—H6C | 109.5 | O4—C14—C13 | 116.60 (11) |
C7—O1—C1—N1 | 179.48 (10) | C6—S1—C4—N2 | −0.74 (11) |
C7—O1—C1—C2 | 0.01 (18) | C6—S1—C4—N1 | 179.09 (9) |
C4—N1—C1—O1 | −178.96 (10) | C13—C8—C9—C10 | 0.86 (19) |
C4—N1—C1—C2 | 0.52 (17) | C8—C9—C10—O5 | −178.72 (11) |
O1—C1—C2—C3 | 178.46 (11) | C8—C9—C10—C11 | 0.08 (19) |
N1—C1—C2—C3 | −0.95 (18) | O5—C10—C11—C12 | 177.68 (12) |
C4—N2—C3—O2 | 179.53 (10) | C9—C10—C11—C12 | −1.2 (2) |
C4—N2—C3—C2 | −0.63 (17) | C10—C11—C12—C13 | 1.4 (2) |
C5—O2—C3—N2 | −5.20 (16) | C11—C12—C13—C8 | −0.42 (19) |
C5—O2—C3—C2 | 174.95 (11) | C11—C12—C13—C14 | 179.62 (12) |
C1—C2—C3—N2 | 1.02 (18) | C9—C8—C13—C12 | −0.70 (19) |
C1—C2—C3—O2 | −179.14 (11) | C9—C8—C13—C14 | 179.26 (11) |
C3—N2—C4—N1 | 0.13 (18) | C12—C13—C14—O3 | 7.67 (17) |
C3—N2—C4—S1 | 179.94 (8) | C8—C13—C14—O3 | −172.29 (11) |
C1—N1—C4—N2 | −0.08 (18) | C12—C13—C14—O4 | −172.05 (11) |
C1—N1—C4—S1 | −179.89 (8) | C8—C13—C14—O4 | 7.99 (17) |
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H1O4···O3i | 0.86 (2) | 1.76 (2) | 2.6189 (14) | 172 (3) |
O5—H1O5···N1ii | 0.80 (3) | 1.99 (3) | 2.7562 (14) | 162 (3) |
C9—H9A···O1ii | 0.95 | 2.44 | 3.3437 (16) | 160 |
C12—H12A···O2iii | 0.95 | 2.59 | 3.3340 (16) | 135 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, y−1, z; (iii) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C7H10N2O2S·C7H6O3 |
Mr | 324.35 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 6.9923 (5), 10.2887 (8), 10.7578 (8) |
α, β, γ (°) | 77.419 (2), 83.381 (2), 89.209 (2) |
V (Å3) | 750.27 (10) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.44 × 0.37 × 0.23 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.901, 0.947 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13682, 3393, 3105 |
Rint | 0.024 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.093, 1.10 |
No. of reflections | 3393 |
No. of parameters | 210 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.46, −0.27 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H1O4···O3i | 0.862 (16) | 1.763 (18) | 2.6189 (14) | 172 (3) |
O5—H1O5···N1ii | 0.80 (3) | 1.99 (3) | 2.7562 (14) | 162 (3) |
C9—H9A···O1ii | 0.95 | 2.44 | 3.3437 (16) | 160 |
C12—H12A···O2iii | 0.95 | 2.59 | 3.3340 (16) | 135 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, y−1, z; (iii) x−1, y, z. |
Footnotes
‡Thomson Reuters ResearcherID: A-5599-2009.
Acknowledgements
The authors thank the Malaysian Government and Universiti Sains Malaysia (USM) for the research facilities and Fundamental Research Grant Scheme (FRGS) No. 203/PFIZIK/6711171 to conduct this work. KT thanks the Academy of Sciences for the Developing World and USM for a TWAS–USM fellowship.
References
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Pyrimidine and aminopyrimidine derivatives are biologically important compounds as they occur in nature as components of nucleic acids. Some aminopyrimidine derivatives are used as antifolate drugs (Hunt et al., 1980; Baker & Santi, 1965). 2-Thiopyrimidine shows a strong bacteriostatic activity in vitro on E. coli (Holy et al., 1974). 4-Hydroxybenzoic acid is a good hydrogen-bond donor and can form co-crystals with other organic molecules (Vishweshwar et al., 2003). We have recently reported the crystal structures of 4,6-dimethoxy-2-(methylsulfanyl)pyrimidine (Balasubramani & Fun, 2009) and 4,6-dimethoxy-2-(methylsulfanyl)pyrimidinium chloride (Hemamalini & Fun, 2010). In order to study some potential hydrogen bonding interactions the crystal structure determination of the title compound (I) was carried out.
The asymmetric unit (Fig. 1), contains one 4,6-dimethoxy-2-(methylsulfanyl)pyrimidine molecule and one 4-hydroxybenzoic acid molecule. The 4,6-dimethoxy-2-(methylsulfanyl)pyrimidine molecule is planar, with a maximum deviation of 0.0806 (14) Å of atom C5 from a mean plane of all non-H atoms. The carboxy group of the 4-hydroxybenzoic acid molecule is slightly twisted from the attached ring by 8.12 (14)°. The bond lengths (Allen et al., 1987) and angles are normal.
In the crystal packing (Fig. 2), the 4-hydroxybenzoic acid molecules are centrosymmetrically paired through a pair of O4—H1O4···O3i hydrogen bonds (symmetry code in Table 1) to form an R22(8) (Bernstein et al., 1995) ring motif. In addition, the 4,6-dimethoxy-2-methylthiopyrimidine molecule and 4-hydroxybenzoic acid molecule are linked via intermolecular O5—H1O5···N1ii and C9—H9A···O1ii hydrogen bonds (symmetry code in Table 1), generating R22(8) ring motifs. The crystal structure is further stabilized by weak C12—H12A···O2iii hydrogen bonds (symmetry code in Table 1), forming a supramolecular tape.