2-(5-Fluoro-3-methyl-sulfanyl-1-benzofuran-2-yl)acetic acid.

The title compound, C(11)H(9)FO(3)S, was prepared by alkaline hydrolysis of ethyl 2-(5-fluoro-3-methyl-sulfanyl-1-benzofuran-2-yl)acetate. In the crystal structure, the carboxyl groups are involved in inter-molecular O-H⋯O hydrogen bonds, which link the mol-ecules into centrosymmetric dimers. These dimers are further packed into stacks along the b axis by inter-molecular C-H⋯O and C-H⋯F inter-actions.

Related literature

For the crystal structures of similar 2-(3-methyl­sulfanyl-1-benzofuran-2-yl) acetic acid derivatives, see: Choi et al. (2009a ▶,b ▶). For the pharmacological activity of benzofuran compounds, see: Howlett et al. (1999 ▶); Twyman & Allsop (1999 ▶).

Experimental

Crystal data

C11H9FO3S

M = 240.24

Monoclinic,

a = 7.5179 (4) Å

b = 27.325 (2) Å

c = 5.0582 (3) Å

β = 90.478 (1)°

V = 1039.05 (11) Å3

Z = 4

Mo Kα radiation

μ = 0.31 mm−1

T = 173 K

0.40 × 0.40 × 0.20 mm

Data collection

Bruker SMART CCD diffractometer

Absorption correction: multi-scan (SADABS; Sheldrick, 1999 ▶) T min = 0.885, T max = 0.940

5774 measured reflections

2015 independent reflections

1758 reflections with I > 2σ(I)

R int = 0.016

Refinement

R[F 2 > 2σ(F 2)] = 0.028

wR(F 2) = 0.076

S = 1.10

2015 reflections

150 parameters

H atoms treated by a mixture of independent and constrained refinement

Δρmax = 0.26 e Å−3

Δρmin = −0.21 e Å−3

Data collection: SMART (Bruker, 2001 ▶); cell refinement: SAINT (Bruker, 2001 ▶); 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 ▶) and DIAMOND (Brandenburg, 1998 ▶); software used to prepare material for publication: SHELXL97.

Crystal structure: contains datablocks global, I. DOI: 10.1107/S160053680902594X/rn2061sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S160053680902594X/rn2061Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

C11H9FO3S	F(000) = 496
Mr = 240.24	Dx = 1.536 Mg m−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 3920 reflections
a = 7.5179 (4) Å	θ = 2.2–27.5°
b = 27.325 (2) Å	µ = 0.31 mm−1
c = 5.0582 (3) Å	T = 173 K
β = 90.478 (1)°	Block, colourless
V = 1039.05 (11) Å3	0.40 × 0.40 × 0.20 mm
Z = 4

Bruker SMART CCD diffractometer	2015 independent reflections
Radiation source: fine-focus sealed tube	1758 reflections with I > 2σ(I)
graphite	Rint = 0.016
Detector resolution: 10.0 pixels mm-1	θmax = 26.0°, θmin = 2.8°
φ and ω scans	h = −8→9
Absorption correction: multi-scan (SADABS; Sheldrick, 1999)	k = −33→31
Tmin = 0.885, Tmax = 0.940	l = −5→6
5774 measured reflections

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)] = 0.028	Hydrogen site location: difference Fourier map
wR(F2) = 0.076	H atoms treated by a mixture of independent and constrained refinement
S = 1.10	w = 1/[σ2(Fo2) + (0.0321P)2 + 0.495P] where P = (Fo2 + 2Fc2)/3
2015 reflections	(Δ/σ)max < 0.001
150 parameters	Δρmax = 0.26 e Å−3
0 restraints	Δρmin = −0.21 e Å−3

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.

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 > 2sigma(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
S	0.31784 (5)	0.316516 (15)	0.58563 (8)	0.02756 (13)
F	0.83216 (14)	0.28556 (4)	−0.2451 (2)	0.0378 (3)
O1	0.59504 (15)	0.43332 (4)	0.3745 (2)	0.0255 (3)
O2	0.19605 (18)	0.46681 (5)	0.3551 (2)	0.0343 (3)
H2	0.102 (3)	0.4823 (9)	0.316 (4)	0.047 (6)*
O3	0.09836 (15)	0.48144 (4)	0.7637 (2)	0.0268 (3)
C1	0.4579 (2)	0.36074 (6)	0.4469 (3)	0.0217 (3)
C2	0.58779 (19)	0.35365 (6)	0.2404 (3)	0.0211 (3)
C3	0.6420 (2)	0.31379 (6)	0.0878 (3)	0.0231 (3)
H3	0.5921	0.2829	0.1067	0.028*
C4	0.7740 (2)	0.32324 (6)	−0.0924 (3)	0.0251 (3)
C5	0.8516 (2)	0.36865 (6)	−0.1307 (3)	0.0277 (4)
H5	0.9394	0.3725	−0.2575	0.033*
C6	0.7982 (2)	0.40828 (6)	0.0203 (3)	0.0264 (3)
H6	0.8478	0.4392	−0.0006	0.032*
C7	0.6668 (2)	0.39915 (6)	0.2039 (3)	0.0224 (3)
C8	0.4683 (2)	0.40835 (6)	0.5179 (3)	0.0232 (3)
C9	0.3703 (2)	0.43787 (6)	0.7168 (3)	0.0277 (4)
H9A	0.4513	0.4620	0.7909	0.033*
H9B	0.3345	0.4164	0.8594	0.033*
C10	0.2076 (2)	0.46410 (5)	0.6137 (3)	0.0219 (3)
C11	0.1570 (2)	0.30916 (8)	0.3207 (3)	0.0372 (4)
H11A	0.0973	0.3397	0.2896	0.056*
H11B	0.0715	0.2847	0.3690	0.056*
H11C	0.2169	0.2991	0.1627	0.056*

	U11	U22	U33	U12	U13	U23
S	0.0263 (2)	0.0334 (2)	0.0230 (2)	−0.00356 (16)	0.00305 (15)	0.00559 (16)
F	0.0415 (6)	0.0317 (5)	0.0406 (6)	0.0029 (4)	0.0146 (5)	−0.0114 (4)
O1	0.0268 (6)	0.0213 (5)	0.0285 (6)	0.0022 (4)	0.0046 (5)	−0.0023 (4)
O2	0.0339 (7)	0.0485 (8)	0.0207 (6)	0.0195 (6)	0.0010 (5)	−0.0011 (5)
O3	0.0251 (6)	0.0318 (6)	0.0234 (6)	0.0067 (5)	0.0057 (4)	0.0003 (4)
C1	0.0189 (7)	0.0249 (8)	0.0215 (7)	0.0035 (6)	0.0008 (6)	0.0025 (6)
C2	0.0174 (7)	0.0238 (8)	0.0219 (7)	0.0022 (6)	−0.0014 (6)	0.0025 (6)
C3	0.0226 (8)	0.0211 (7)	0.0257 (8)	0.0011 (6)	−0.0012 (6)	0.0008 (6)
C4	0.0237 (8)	0.0261 (8)	0.0254 (8)	0.0051 (6)	0.0009 (6)	−0.0048 (6)
C5	0.0216 (8)	0.0346 (9)	0.0269 (8)	−0.0005 (7)	0.0050 (6)	0.0007 (7)
C6	0.0241 (8)	0.0243 (8)	0.0308 (8)	−0.0033 (6)	0.0027 (6)	0.0011 (6)
C7	0.0216 (8)	0.0212 (7)	0.0244 (7)	0.0029 (6)	−0.0003 (6)	−0.0016 (6)
C8	0.0202 (8)	0.0275 (8)	0.0218 (7)	0.0045 (6)	0.0008 (6)	0.0017 (6)
C9	0.0286 (9)	0.0319 (9)	0.0224 (8)	0.0085 (7)	0.0005 (6)	−0.0028 (6)
C10	0.0236 (8)	0.0197 (7)	0.0225 (7)	−0.0001 (6)	0.0028 (6)	−0.0015 (6)
C11	0.0322 (10)	0.0500 (11)	0.0293 (9)	−0.0112 (8)	0.0006 (7)	−0.0013 (8)

S—C1	1.753 (2)	C3—H3	0.9300
S—C11	1.809 (2)	C4—C5	1.385 (2)
F—C4	1.361 (2)	C5—C6	1.386 (2)
O1—C8	1.382 (2)	C5—H5	0.9300
O1—C7	1.384 (2)	C6—C7	1.385 (2)
O2—C10	1.312 (2)	C6—H6	0.9300
O2—H2	0.84 (2)	C8—C9	1.489 (2)
O3—C10	1.219 (2)	C9—C10	1.507 (2)
C1—C8	1.352 (2)	C9—H9A	0.9700
C1—C2	1.449 (2)	C9—H9B	0.9700
C2—C7	1.391 (2)	C11—H11A	0.9600
C2—C3	1.398 (2)	C11—H11B	0.9600
C3—C4	1.378 (2)	C11—H11C	0.9600
C1—S—C11	100.36 (8)	O1—C7—C6	125.50 (14)
C8—O1—C7	105.54 (12)	O1—C7—C2	110.57 (13)
C10—O2—H2	107.9 (15)	C6—C7—C2	123.93 (14)
C8—C1—C2	106.38 (13)	C1—C8—O1	111.99 (13)
C8—C1—S	126.22 (12)	C1—C8—C9	132.27 (15)
C2—C1—S	127.38 (12)	O1—C8—C9	115.73 (14)
C7—C2—C3	119.76 (14)	C8—C9—C10	115.38 (13)
C7—C2—C1	105.51 (13)	C8—C9—H9A	108.4
C3—C2—C1	134.72 (14)	C10—C9—H9A	108.4
C4—C3—C2	115.75 (14)	C8—C9—H9B	108.4
C4—C3—H3	122.1	C10—C9—H9B	108.4
C2—C3—H3	122.1	H9A—C9—H9B	107.5
F—C4—C3	118.04 (14)	O3—C10—O2	123.98 (15)
F—C4—C5	117.43 (14)	O3—C10—C9	121.25 (14)
C3—C4—C5	124.53 (14)	O2—C10—C9	114.76 (13)
C4—C5—C6	119.90 (14)	S—C11—H11A	109.5
C4—C5—H5	120.0	S—C11—H11B	109.5
C6—C5—H5	120.0	H11A—C11—H11B	109.5
C7—C6—C5	116.12 (15)	S—C11—H11C	109.5
C7—C6—H6	121.9	H11A—C11—H11C	109.5
C5—C6—H6	121.9	H11B—C11—H11C	109.5
C11—S—C1—C8	107.19 (15)	C5—C6—C7—C2	−0.6 (2)
C11—S—C1—C2	−74.59 (15)	C3—C2—C7—O1	−179.70 (13)
C8—C1—C2—C7	−0.23 (17)	C1—C2—C7—O1	0.38 (17)
S—C1—C2—C7	−178.73 (12)	C3—C2—C7—C6	0.6 (2)
C8—C1—C2—C3	179.87 (17)	C1—C2—C7—C6	−179.33 (15)
S—C1—C2—C3	1.4 (3)	C2—C1—C8—O1	−0.01 (17)
C7—C2—C3—C4	0.0 (2)	S—C1—C8—O1	178.52 (11)
C1—C2—C3—C4	179.93 (16)	C2—C1—C8—C9	179.85 (16)
C2—C3—C4—F	179.70 (14)	S—C1—C8—C9	−1.6 (3)
C2—C3—C4—C5	−0.7 (2)	C7—O1—C8—C1	0.24 (17)
F—C4—C5—C6	−179.66 (14)	C7—O1—C8—C9	−179.65 (13)
C3—C4—C5—C6	0.7 (3)	C1—C8—C9—C10	−92.8 (2)
C4—C5—C6—C7	−0.1 (2)	O1—C8—C9—C10	87.07 (18)
C8—O1—C7—C6	179.32 (15)	C8—C9—C10—O3	165.74 (15)
C8—O1—C7—C2	−0.39 (16)	C8—C9—C10—O2	−14.8 (2)
C5—C6—C7—O1	179.77 (14)

D—H···A	D—H	H···A	D···A	D—H···A
C6—H6···O3i	0.93	2.52	3.2896 (19)	141
C6—H6···O3ii	0.93	2.51	3.296 (2)	143
O2—H2···O3iii	0.84 (2)	1.85 (2)	2.6902 (17)	178 (2)
C11—H11B···Fiv	0.96	2.69	3.572 (2)	153
C11—H11B···Fv	0.96	2.67	3.361 (2)	130

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C6—H6⋯O3i	0.93	2.52	3.2896 (19)	141
C6—H6⋯O3ii	0.93	2.51	3.296 (2)	143
O2—H2⋯O3iii	0.84 (2)	1.85 (2)	2.6902 (17)	178 (2)
C11—H11B⋯Fiv	0.96	2.69	3.572 (2)	153
C11—H11B⋯Fv	0.96	2.67	3.361 (2)	130

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) .