Download citation
Download citation
link to html
In solid-state engineering, cocrystallization is a strategy actively pursued for pharmaceuticals. Two 1:1 cocrystals of 5-fluoro­uracil (5FU; systematic name: 5-fluoro-1,3-dihydropyrimidine-2,4-dione), namely 5-fluoro­uracil–5-bromo­thio­phene-2-carb­oxy­lic acid (1/1), C5H3BrO2S·C4H3FN2O2, (I), and 5-fluoro­uracil–thio­phene-2-carb­oxy­lic acid (1/1), C4H3FN2O2·C5H4O2S, (II), have been synthesized and characterized by single-crystal X-ray diffraction studies. In both cocrystals, carb­oxy­lic acid mol­ecules are linked through an acid–acid R22(8) homosynthon (O—H...O) to form a carb­oxy­lic acid dimer and 5FU mol­ecules are connected through two types of base pairs [homosynthon, R22(8) motif] via a pair of N—H...O hydrogen bonds. The crystal structures are further stabilized by C—H...O inter­actions in (II) and C—Br...O inter­actions in (I). In both crystal structures, π–π stacking and C—F...π inter­actions are also observed.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S2053229617007550/ov3090sup1.cif
Contains datablocks I, II

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S2053229617007550/ov3090Isup2.hkl
Contains datablock I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S2053229617007550/ov3090IIsup3.hkl
Contains datablock II

cml

Chemical Markup Language (CML) file https://doi.org/10.1107/S2053229617007550/ov3090Isup4.cml
Supplementary material

cml

Chemical Markup Language (CML) file https://doi.org/10.1107/S2053229617007550/ov3090IIsup5.cml
Supplementary material

CCDC references: 1551372; 1551371

Computing details top

For both structures, data collection: APEX3 (Bruker, 2015); cell refinement: SAINT (Bruker, 2015); data reduction: SAINT (Bruker, 2015); program(s) used to solve structure: SHELXT2014 (Sheldrick, 2015a). Program(s) used to refine structure: SHELXL2016 (Sheldrick, 2015b) for (I); SHELXL2014 (Sheldrick, 2015b) for (II). For both structures, molecular graphics: PLATON (Spek, 2009), Mercury (Macrae et al., 2008) and POVRay (Cason, 2004); software used to prepare material for publication: PLATON (Spek, 2009) and publCIF (Westrip, 2010).

5-Fluoro-1,3-dihydropyrimidine-2,4-dione–5-bromothiophene-2-carboxylic acid (1/1) (I) top
Crystal data top
C5H3BrO2S·C4H3FN2O2Z = 2
Mr = 337.13F(000) = 332
Triclinic, P1Dx = 1.977 Mg m3
a = 6.8884 (4) ÅMo Kα radiation, λ = 0.71073 Å
b = 9.5036 (6) ÅCell parameters from 15925 reflections
c = 9.6180 (6) Åθ = 2.2–26.4°
α = 73.608 (2)°µ = 3.83 mm1
β = 87.634 (2)°T = 100 K
γ = 69.969 (2)°Column, colourless
V = 566.43 (6) Å30.33 × 0.08 × 0.07 mm
Data collection top
Bruker D8 Venture Photon 100
diffractometer
2194 reflections with I > 2σ(I)
Radiation source: Incoatec IµSRint = 0.032
φ and ω scansθmax = 26.4°, θmin = 2.2°
Absorption correction: multi-scan
(SADABS; Krause et al., 2015)
h = 88
Tmin = 0.745, Tmax = 1.000k = 1111
15925 measured reflectionsl = 1212
2317 independent reflections
Refinement top
Refinement on F2Primary atom site location: dual
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.019Hydrogen site location: mixed
wR(F2) = 0.051H atoms treated by a mixture of independent and constrained refinement
S = 1.06 w = 1/[σ2(Fo2) + (0.0276P)2 + 0.2836P]
where P = (Fo2 + 2Fc2)/3
2317 reflections(Δ/σ)max = 0.001
175 parametersΔρmax = 0.32 e Å3
0 restraintsΔρmin = 0.40 e Å3
Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Br10.58555 (3)0.24988 (2)0.24091 (2)0.02083 (7)
S11.02198 (6)0.01224 (5)0.31979 (5)0.01651 (10)
F10.03159 (16)0.39395 (11)0.20314 (12)0.0250 (2)
O10.26161 (18)1.01827 (13)0.00967 (14)0.0174 (3)
O20.29276 (19)0.56879 (14)0.13895 (15)0.0234 (3)
O31.25662 (19)0.46319 (14)0.51842 (15)0.0230 (3)
O41.4071 (2)0.29176 (15)0.39859 (15)0.0218 (3)
N10.3213 (2)0.78787 (17)0.06855 (17)0.0168 (3)
N30.0123 (2)0.79068 (16)0.06118 (16)0.0152 (3)
C20.1954 (2)0.87409 (19)0.03752 (18)0.0141 (3)
C40.1048 (3)0.62998 (19)0.11854 (19)0.0167 (3)
C50.0446 (3)0.55091 (19)0.14866 (19)0.0168 (3)
C60.2481 (3)0.6279 (2)0.12366 (19)0.0180 (3)
H60.3420000.5721710.1439050.022*
C71.0465 (3)0.20354 (19)0.40967 (19)0.0171 (3)
C80.8580 (3)0.2205 (2)0.4387 (2)0.0203 (4)
H80.8416310.3171630.4879760.024*
C90.6907 (3)0.0786 (2)0.3874 (2)0.0211 (4)
H90.5492020.0687970.3971460.025*
C100.7577 (3)0.0427 (2)0.32214 (19)0.0177 (3)
C111.2454 (3)0.3306 (2)0.44742 (19)0.0175 (3)
H10.437 (4)0.834 (3)0.054 (2)0.022 (6)*
H30.093 (4)0.846 (3)0.043 (2)0.024 (5)*
H41.514 (5)0.372 (3)0.425 (3)0.047 (8)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Br10.02001 (11)0.01190 (10)0.02576 (12)0.00155 (7)0.00404 (7)0.00217 (7)
S10.0160 (2)0.0121 (2)0.0199 (2)0.00474 (16)0.00073 (16)0.00224 (16)
F10.0217 (5)0.0102 (5)0.0363 (6)0.0034 (4)0.0012 (5)0.0014 (4)
O10.0124 (6)0.0118 (6)0.0255 (7)0.0031 (4)0.0007 (5)0.0028 (5)
O20.0129 (6)0.0156 (6)0.0357 (8)0.0011 (5)0.0031 (5)0.0021 (5)
O30.0173 (6)0.0125 (6)0.0346 (8)0.0039 (5)0.0007 (5)0.0012 (5)
O40.0162 (6)0.0139 (6)0.0308 (7)0.0042 (5)0.0003 (5)0.0009 (5)
N10.0080 (7)0.0128 (7)0.0272 (8)0.0023 (6)0.0005 (6)0.0034 (6)
N30.0111 (7)0.0111 (7)0.0220 (8)0.0039 (5)0.0002 (6)0.0026 (6)
C20.0127 (8)0.0134 (8)0.0151 (8)0.0033 (6)0.0012 (6)0.0042 (6)
C40.0154 (8)0.0128 (8)0.0188 (9)0.0020 (6)0.0010 (7)0.0031 (6)
C50.0193 (8)0.0088 (7)0.0193 (9)0.0039 (6)0.0007 (7)0.0006 (6)
C60.0182 (8)0.0140 (8)0.0227 (9)0.0077 (7)0.0018 (7)0.0037 (7)
C70.0193 (9)0.0123 (8)0.0190 (9)0.0052 (6)0.0004 (7)0.0034 (6)
C80.0204 (9)0.0143 (8)0.0252 (10)0.0072 (7)0.0002 (7)0.0025 (7)
C90.0160 (9)0.0177 (9)0.0292 (10)0.0064 (7)0.0001 (7)0.0053 (7)
C100.0159 (8)0.0148 (8)0.0202 (9)0.0024 (6)0.0019 (7)0.0047 (7)
C110.0183 (8)0.0146 (8)0.0196 (9)0.0054 (7)0.0008 (7)0.0049 (7)
Geometric parameters (Å, º) top
Br1—C101.8712 (17)N3—C21.369 (2)
S1—C101.7143 (18)N3—C41.389 (2)
S1—C71.7308 (17)N3—H30.86 (2)
F1—C51.3492 (19)C4—C51.446 (2)
O1—C21.237 (2)C5—C61.335 (2)
O2—C41.222 (2)C6—H60.9500
O3—C111.229 (2)C7—C81.370 (3)
O4—C111.319 (2)C7—C111.458 (2)
O4—H40.84 (3)C8—C91.413 (2)
N1—C21.356 (2)C8—H80.9500
N1—C61.375 (2)C9—C101.367 (2)
N1—H10.77 (2)C9—H90.9500
C10—S1—C790.45 (8)C5—C6—H6120.1
C11—O4—H4108.2 (19)N1—C6—H6120.1
C2—N1—C6122.94 (15)C8—C7—C11124.66 (16)
C2—N1—H1116.0 (17)C8—C7—S1111.96 (13)
C6—N1—H1121.1 (17)C11—C7—S1123.38 (13)
C2—N3—C4126.93 (14)C7—C8—C9112.72 (16)
C2—N3—H3115.6 (15)C7—C8—H8123.6
C4—N3—H3117.4 (15)C9—C8—H8123.6
O1—C2—N1122.87 (15)C10—C9—C8111.60 (16)
O1—C2—N3121.65 (15)C10—C9—H9124.2
N1—C2—N3115.48 (14)C8—C9—H9124.2
O2—C4—N3121.07 (16)C9—C10—S1113.27 (13)
O2—C4—C5126.42 (15)C9—C10—Br1125.04 (14)
N3—C4—C5112.51 (14)S1—C10—Br1121.68 (10)
C6—C5—F1121.13 (15)O3—C11—O4123.82 (16)
C6—C5—C4122.25 (15)O3—C11—C7121.27 (16)
F1—C5—C4116.62 (15)O4—C11—C7114.91 (15)
C5—C6—N1119.82 (15)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···O1i0.76 (3)2.05 (3)2.809 (2)173 (3)
N3—H3···O1ii0.87 (3)1.97 (3)2.837 (2)176 (2)
O4—H4···O3iii0.84 (3)1.77 (3)2.614 (2)178 (4)
C6—H6···O2iv0.952.533.387 (3)150
C8—H8···O3v0.952.423.276 (2)150
Symmetry codes: (i) x1, y+2, z; (ii) x, y+2, z; (iii) x+3, y1, z+1; (iv) x1, y, z; (v) x+2, y1, z+1.
5-Fluoro-1,3-dihydropyrimidine-2,4-dione–thiophene-2-carboxylic acid (1/1) (II) top
Crystal data top
C4H3FN2O2·C5H4O2SZ = 2
Mr = 258.23F(000) = 264
Triclinic, P1Dx = 1.684 Mg m3
a = 6.8304 (3) ÅMo Kα radiation, λ = 0.71073 Å
b = 7.0075 (4) ÅCell parameters from 9804 reflections
c = 12.3042 (6) Åθ = 3.3–28.3°
α = 93.348 (2)°µ = 0.34 mm1
β = 103.091 (1)°T = 100 K
γ = 115.566 (1)°Column, colourless
V = 509.22 (4) Å30.38 × 0.11 × 0.11 mm
Data collection top
Bruker D8 Venture Photon 100
diffractometer
2357 reflections with I > 2σ(I)
Radiation source: Incoatec IµSRint = 0.023
φ and ω scansθmax = 28.3°, θmin = 3.3°
Absorption correction: multi-scan
(SADABS; Krause et al., 2015)
h = 79
Tmin = 0.913, Tmax = 1.000k = 99
11445 measured reflectionsl = 1616
2525 independent reflections
Refinement top
Refinement on F2Primary atom site location: dual
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.028Hydrogen site location: mixed
wR(F2) = 0.075H atoms treated by a mixture of independent and constrained refinement
S = 1.06 w = 1/[σ2(Fo2) + (0.0386P)2 + 0.1738P]
where P = (Fo2 + 2Fc2)/3
2525 reflections(Δ/σ)max = 0.001
187 parametersΔρmax = 0.37 e Å3
10 restraintsΔρmin = 0.32 e Å3
Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/UeqOcc. (<1)
F50.00118 (11)0.30564 (11)0.05970 (5)0.02370 (16)
O10.25578 (13)0.51105 (13)0.51342 (6)0.02083 (18)
O20.40406 (13)0.32871 (13)0.19059 (6)0.02030 (17)
N10.00787 (14)0.43648 (14)0.34484 (7)0.01586 (18)
H10.094 (2)0.457 (2)0.3786 (12)0.022 (3)*
N30.32358 (14)0.41751 (14)0.35057 (7)0.01623 (19)
H30.454 (2)0.431 (2)0.3924 (13)0.032 (4)*
C20.19242 (17)0.45695 (16)0.40839 (9)0.0154 (2)
C40.27477 (17)0.36230 (16)0.23342 (8)0.0154 (2)
C50.06057 (17)0.35276 (16)0.17355 (8)0.0164 (2)
C60.07365 (17)0.38684 (16)0.22804 (9)0.0164 (2)
H60.21400.37680.18630.020*
S1A0.50067 (8)0.85187 (10)0.13743 (3)0.01907 (13)0.8318 (16)
C7A0.6604 (10)0.8915 (19)0.2741 (3)0.0168 (4)0.8318 (16)
C8A0.8511 (13)0.8729 (14)0.2758 (6)0.0196 (9)0.8318 (16)
H8A0.95890.88790.34420.024*0.8318 (16)
C9A0.8754 (3)0.8300 (4)0.16898 (15)0.0205 (3)0.8318 (16)
H9A1.00080.81570.15620.025*0.8318 (16)
C10A0.6940 (3)0.8109 (3)0.08448 (15)0.0202 (3)0.8318 (16)
H10A0.67770.77890.00590.024*0.8318 (16)
C11A0.5891 (12)0.938 (2)0.3713 (3)0.0171 (4)0.8318 (16)
O3A0.7151 (12)0.9703 (16)0.4707 (5)0.0262 (7)0.8318 (16)
O4A0.3972 (6)0.9389 (7)0.35536 (17)0.0221 (4)0.8318 (16)
H4A0.37850.96820.41830.033*0.8318 (16)
S1B0.8842 (18)0.8707 (18)0.2879 (8)0.0196 (9)0.1682 (16)
C7B0.636 (5)0.887 (10)0.2725 (13)0.0168 (4)0.1682 (16)
C8B0.528 (2)0.860 (3)0.1612 (9)0.01907 (13)0.1682 (16)
H8B0.39080.86930.13690.023*0.1682 (16)
C9B0.828 (2)0.814 (2)0.1436 (8)0.0205 (3)0.1682 (16)
H9B0.92230.78250.10740.025*0.1682 (16)
C10B0.6340 (16)0.8170 (19)0.0855 (10)0.0202 (3)0.1682 (16)
H10B0.57940.79360.00530.024*0.1682 (16)
C11B0.571 (6)0.933 (13)0.3718 (17)0.0171 (4)0.1682 (16)
O3B0.725 (7)0.985 (8)0.464 (3)0.0262 (7)0.1682 (16)
H3B0.67380.99500.51890.039*0.1682 (16)
O4B0.377 (3)0.928 (4)0.3352 (12)0.0221 (4)0.1682 (16)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
F50.0248 (3)0.0363 (4)0.0111 (3)0.0157 (3)0.0040 (2)0.0026 (3)
O10.0161 (4)0.0348 (4)0.0135 (4)0.0141 (3)0.0039 (3)0.0011 (3)
O20.0198 (4)0.0287 (4)0.0175 (4)0.0140 (3)0.0089 (3)0.0026 (3)
N10.0128 (4)0.0221 (4)0.0150 (4)0.0099 (3)0.0049 (3)0.0009 (3)
N30.0133 (4)0.0244 (4)0.0130 (4)0.0108 (3)0.0035 (3)0.0009 (3)
C20.0138 (4)0.0184 (4)0.0150 (4)0.0078 (4)0.0051 (4)0.0012 (3)
C40.0158 (5)0.0172 (4)0.0143 (4)0.0075 (4)0.0065 (4)0.0022 (3)
C50.0172 (5)0.0201 (5)0.0115 (4)0.0083 (4)0.0034 (4)0.0021 (3)
C60.0141 (4)0.0185 (4)0.0160 (5)0.0078 (4)0.0025 (4)0.0026 (4)
S1A0.0183 (2)0.02611 (18)0.0110 (2)0.00991 (16)0.00191 (17)0.00117 (19)
C7A0.0170 (15)0.0184 (7)0.0142 (5)0.0069 (16)0.0055 (6)0.0023 (4)
C8A0.020 (2)0.0250 (4)0.0161 (14)0.0129 (11)0.0043 (13)0.0047 (8)
C9A0.0205 (10)0.0225 (7)0.0214 (9)0.0114 (8)0.0084 (7)0.0029 (8)
C10A0.0244 (10)0.0244 (5)0.0158 (5)0.0122 (7)0.0112 (7)0.0018 (4)
C11A0.0171 (14)0.0190 (9)0.0157 (5)0.0080 (16)0.0060 (5)0.0027 (4)
O3A0.0256 (8)0.0422 (17)0.0138 (10)0.0190 (9)0.0044 (8)0.0020 (7)
O4A0.0192 (8)0.0371 (7)0.0114 (10)0.0150 (7)0.0035 (8)0.0000 (10)
S1B0.020 (2)0.0250 (4)0.0161 (14)0.0129 (11)0.0043 (13)0.0047 (8)
C7B0.0170 (15)0.0184 (7)0.0142 (5)0.0069 (16)0.0055 (6)0.0023 (4)
C8B0.0183 (2)0.02611 (18)0.0110 (2)0.00991 (16)0.00191 (17)0.00117 (19)
C9B0.0205 (10)0.0225 (7)0.0214 (9)0.0114 (8)0.0084 (7)0.0029 (8)
C10B0.0244 (10)0.0244 (5)0.0158 (5)0.0122 (7)0.0112 (7)0.0018 (4)
C11B0.0171 (14)0.0190 (9)0.0157 (5)0.0080 (16)0.0060 (5)0.0027 (4)
O3B0.0256 (8)0.0422 (17)0.0138 (10)0.0190 (9)0.0044 (8)0.0020 (7)
O4B0.0192 (8)0.0371 (7)0.0114 (10)0.0150 (7)0.0035 (8)0.0000 (10)
Geometric parameters (Å, º) top
F5—C51.3449 (11)C9A—C10A1.375 (2)
O1—C21.2445 (12)C9A—H9A0.9500
O2—C41.2202 (13)C10A—H10A0.9500
N1—C21.3553 (13)C11A—O3A1.269 (3)
N1—C61.3793 (13)C11A—O4A1.2849 (17)
N1—H10.846 (13)O4A—H4A0.8400
N3—C21.3655 (13)S1B—C9B1.714 (5)
N3—C41.3944 (12)S1B—C7B1.714 (6)
N3—H30.883 (13)C7B—C8B1.360 (8)
C4—C51.4524 (14)C7B—C11B1.458 (5)
C5—C61.3400 (14)C8B—C10B1.393 (8)
C6—H60.9500C8B—H8B0.9500
S1A—C10A1.7164 (15)C9B—C10B1.365 (5)
S1A—C7A1.717 (3)C9B—H9B0.9500
C7A—C8A1.360 (6)C10B—H10B0.9500
C7A—C11A1.4581 (17)C11B—O3B1.270 (5)
C8A—C9A1.393 (7)C11B—O4B1.285 (5)
C8A—H8A0.9500O3B—H3B0.8400
C2—N1—C6122.43 (9)C10A—C9A—H9A124.4
C2—N1—H1118.2 (10)C8A—C9A—H9A124.4
C6—N1—H1119.3 (10)C9A—C10A—S1A112.20 (15)
C2—N3—C4126.89 (9)C9A—C10A—H10A123.9
C2—N3—H3115.8 (11)S1A—C10A—H10A123.9
C4—N3—H3117.3 (11)O3A—C11A—O4A120.9 (6)
O1—C2—N1122.30 (9)O3A—C11A—C7A119.4 (6)
O1—C2—N3121.47 (9)O4A—C11A—C7A119.7 (3)
N1—C2—N3116.22 (9)C11A—O4A—H4A109.5
O2—C4—N3121.41 (9)C9B—S1B—C7B90.4 (9)
O2—C4—C5126.36 (10)C8B—C7B—C11B128.4 (15)
N3—C4—C5112.23 (9)C8B—C7B—S1B111.1 (12)
C6—C5—F5121.13 (9)C11B—C7B—S1B120.5 (12)
C6—C5—C4122.23 (9)C7B—C8B—C10B114.8 (13)
F5—C5—C4116.64 (9)C7B—C8B—H8B122.6
C5—C6—N1119.94 (9)C10B—C8B—H8B122.6
C5—C6—H6120.0C10B—C9B—S1B113.6 (10)
N1—C6—H6120.0C10B—C9B—H9B123.2
C10A—S1A—C7A91.18 (12)S1B—C9B—H9B123.2
C8A—C7A—C11A127.3 (4)C9B—C10B—C8B110.0 (11)
C8A—C7A—S1A111.0 (4)C9B—C10B—H10B125.0
C11A—C7A—S1A121.7 (2)C8B—C10B—H10B125.0
C7A—C8A—C9A114.4 (5)O3B—C11B—O4B139 (3)
C7A—C8A—H8A122.8O3B—C11B—C7B113 (3)
C9A—C8A—H8A122.8O4B—C11B—C7B106.9 (17)
C10A—C9A—C8A111.2 (4)C11B—O3B—H3B109.5
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···O1i0.85 (2)1.97 (2)2.8008 (13)167 (1)
N3—H3···O1ii0.88 (2)1.91 (2)2.7908 (13)175 (1)
O4A—H4A···O3Aiii0.841.742.565 (8)167
C6—H6···O2iv0.952.503.3293 (16)147
C8A—H8A···O3Av0.952.583.510 (11)166
C10A—H10A···O2vi0.952.353.2987 (19)174
Symmetry codes: (i) x, y+1, z+1; (ii) x+1, y+1, z+1; (iii) x+1, y+2, z+1; (iv) x1, y, z; (v) x+2, y+2, z+1; (vi) x+1, y+1, z.
 

Follow Acta Cryst. C
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds