Literature DB >> 21754147

1-Methyl-2-[(E)-2,4,5-trimeth-oxy-styr-yl]pyridinium 4-meth-oxy-benzene-sulfonate monohydrate.

Hoong-Kun Fun, Charoensak Mueangkeaw, Pumsak Ruanwas, Suchada Chantrapromma.   

Abstract

In the title compound, C(17)H(20)NO(3) (+)·C(7)H(7)O(4)S(-)·H(2)O, the cation exists in an E configuration with respect to the C=C bond and is twisted with a dihedral angle of 17.81 (8)° between the pyridinium and benzene rings. The benzene ring of the anion is almost parallel to the pyridinium ring [dihedral angle = 3.45 (9)°], whereas it is inclined to the benzene ring of the cation [dihedral angle = 17.62 (8)°]. The crystal structure is stabilized by O-H⋯O hydrogen bonds and weak C-H⋯O inter-actions which link the cations, anions and water mol-ecules into chains along the a axis. π-π inter-actions with centroid-centroid distances of 3.7751 (9) and 3.7920 (11) Å are also observed.

Entities:  

Year:  2011        PMID: 21754147      PMCID: PMC3100012          DOI: 10.1107/S1600536811008610

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For bond-length data, see: Allen et al. (1987 ▶). For background to the non-linear optical properties and applications of pyridinium and quinolinium derivatives, see: Chanawanno et al. (2010 ▶), Chantrapromma et al. (2010 ▶); Fun et al. (2009 ▶); Ruanwas et al. (2010 ▶); Williams (1984 ▶). For related structures, see, Chantrapromma et al. (2007 ▶); Mueangkeaw et al. (2010 ▶). For the stability of the temperature controller used in the data collection, see Cosier & Glazer, (1986 ▶).

Experimental

Crystal data

C17H20NO3C7H7O4S−·H2O M = 491.55 Triclinic, a = 6.8463 (4) Å b = 10.8855 (5) Å c = 15.8137 (8) Å α = 83.950 (2)° β = 81.355 (2)° γ = 81.140 (2)° V = 1147.14 (10) Å3 Z = 2 Mo Kα radiation μ = 0.19 mm−1 T = 100 K 0.40 × 0.08 × 0.06 mm

Data collection

Bruker APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2005 ▶) T min = 0.927, T max = 0.989 20386 measured reflections 5219 independent reflections 4534 reflections with I > 2σ(I) R int = 0.044

Refinement

R[F 2 > 2σ(F 2)] = 0.045 wR(F 2) = 0.124 S = 1.05 5219 reflections 320 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.54 e Å−3 Δρmin = −0.56 e Å−3 Data collection: APEX2 (Bruker, 2005 ▶); cell refinement: SAINT (Bruker, 2005 ▶); 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 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536811008610/rz2563sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536811008610/rz2563Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C17H20NO3+·C7H7O4S·H2OZ = 2
Mr = 491.55F(000) = 520
Triclinic, P1Dx = 1.423 Mg m3
Hall symbol: -P 1Melting point = 453–454 K
a = 6.8463 (4) ÅMo Kα radiation, λ = 0.71073 Å
b = 10.8855 (5) ÅCell parameters from 5219 reflections
c = 15.8137 (8) Åθ = 1.9–27.5°
α = 83.950 (2)°µ = 0.19 mm1
β = 81.355 (2)°T = 100 K
γ = 81.140 (2)°Needle, orange
V = 1147.14 (10) Å30.40 × 0.08 × 0.06 mm
Bruker APEXII CCD area-detector diffractometer5219 independent reflections
Radiation source: sealed tube4534 reflections with I > 2σ(I)
graphiteRint = 0.044
φ and ω scansθmax = 27.5°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Bruker, 2005)h = −8→8
Tmin = 0.927, Tmax = 0.989k = −14→14
20386 measured reflectionsl = −20→20
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.045Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.124H atoms treated by a mixture of independent and constrained refinement
S = 1.05w = 1/[σ2(Fo2) + (0.0633P)2 + 0.7052P] where P = (Fo2 + 2Fc2)/3
5219 reflections(Δ/σ)max = 0.001
320 parametersΔρmax = 0.54 e Å3
0 restraintsΔρmin = −0.56 e Å3
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 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.
xyzUiso*/Ueq
O10.66045 (19)0.25805 (10)0.59540 (7)0.0188 (3)
O20.68611 (19)0.08432 (10)0.71952 (7)0.0175 (3)
O30.80545 (19)−0.23713 (10)0.52116 (7)0.0179 (3)
N10.9833 (2)−0.28189 (12)0.22686 (9)0.0161 (3)
C11.0348 (3)−0.30052 (16)0.14228 (11)0.0190 (3)
H1A1.0992−0.37810.12660.023*
C20.9938 (3)−0.20721 (16)0.07975 (11)0.0206 (4)
H2A1.0305−0.22040.02200.025*
C30.8952 (3)−0.09151 (16)0.10463 (11)0.0204 (4)
H3A0.8652−0.02690.06320.024*
C40.8425 (3)−0.07334 (15)0.19030 (11)0.0180 (3)
H4A0.77580.00350.20630.022*
C50.8881 (2)−0.16930 (15)0.25392 (11)0.0162 (3)
C60.8438 (3)−0.15693 (15)0.34518 (11)0.0170 (3)
H6A0.8501−0.22930.38220.020*
C70.7939 (2)−0.04592 (15)0.37962 (10)0.0156 (3)
H7A0.77850.02410.34080.019*
C80.7615 (2)−0.02274 (14)0.46947 (10)0.0146 (3)
C90.7239 (2)0.10386 (14)0.48848 (10)0.0151 (3)
H9A0.71690.16610.44350.018*
C100.6973 (2)0.13751 (14)0.57154 (10)0.0145 (3)
C110.7094 (2)0.04381 (14)0.63954 (10)0.0146 (3)
C120.7439 (2)−0.08119 (14)0.62344 (10)0.0157 (3)
H12A0.7494−0.14280.66880.019*
C130.7702 (2)−0.11436 (14)0.53926 (11)0.0147 (3)
C141.0358 (3)−0.38729 (15)0.29003 (11)0.0205 (4)
H14A1.1044−0.45740.26040.031*
H14B0.9164−0.40980.32420.031*
H14C1.1208−0.36310.32660.031*
C150.6289 (3)0.35323 (15)0.52829 (11)0.0229 (4)
H15A0.59490.43270.55190.034*
H15B0.52190.33790.49970.034*
H15C0.74850.35350.48790.034*
C160.7042 (3)−0.00944 (15)0.79006 (10)0.0182 (3)
H16A0.68720.03000.84270.027*
H16B0.8338−0.05830.78210.027*
H16C0.6036−0.06270.79250.027*
C170.8118 (3)−0.33027 (15)0.59227 (11)0.0205 (4)
H17A0.8410−0.41160.57130.031*
H17B0.6849−0.32290.62800.031*
H17C0.9137−0.31870.62510.031*
S10.74248 (6)0.29952 (4)0.22553 (3)0.01886 (12)
O40.7780 (2)0.31567 (12)0.31164 (9)0.0316 (3)
O50.9172 (2)0.24169 (11)0.17148 (9)0.0286 (3)
O60.5690 (2)0.23666 (11)0.22522 (9)0.0247 (3)
O70.49664 (19)0.80352 (10)0.06333 (8)0.0205 (3)
C180.6572 (3)0.59021 (15)0.04644 (11)0.0181 (3)
H18A0.68070.6042−0.01300.022*
C190.7175 (3)0.47361 (15)0.08730 (11)0.0181 (3)
H19A0.78290.40950.05460.022*
C200.6816 (2)0.45156 (14)0.17576 (11)0.0161 (3)
C210.5851 (3)0.54790 (15)0.22507 (11)0.0178 (3)
H21A0.56070.53350.28450.021*
C220.5252 (3)0.66499 (15)0.18597 (11)0.0179 (3)
H22A0.46200.72930.21890.021*
C230.5608 (3)0.68533 (14)0.09672 (11)0.0160 (3)
C240.5288 (3)0.82721 (16)−0.02806 (11)0.0248 (4)
H24A0.47920.9127−0.04370.037*
H24B0.45960.7735−0.05360.037*
H24C0.66900.8113−0.04820.037*
O1W0.2248 (2)0.38849 (12)0.16774 (9)0.0228 (3)
H2W10.320 (5)0.349 (3)0.1858 (17)0.047 (8)*
H1W10.134 (4)0.342 (3)0.1731 (16)0.043 (7)*
U11U22U33U12U13U23
O10.0289 (7)0.0070 (5)0.0203 (6)0.0022 (5)−0.0065 (5)−0.0025 (4)
O20.0255 (7)0.0094 (5)0.0168 (5)0.0022 (5)−0.0041 (5)−0.0017 (4)
O30.0261 (7)0.0076 (5)0.0194 (6)0.0010 (5)−0.0035 (5)−0.0027 (4)
N10.0164 (7)0.0121 (6)0.0201 (7)0.0002 (5)−0.0046 (5)−0.0038 (5)
C10.0172 (8)0.0170 (8)0.0234 (8)−0.0001 (6)−0.0026 (7)−0.0083 (6)
C20.0195 (9)0.0226 (8)0.0197 (8)−0.0011 (7)−0.0023 (7)−0.0057 (7)
C30.0215 (9)0.0173 (8)0.0222 (8)−0.0011 (7)−0.0049 (7)−0.0005 (6)
C40.0179 (8)0.0130 (7)0.0233 (8)−0.0002 (6)−0.0043 (7)−0.0037 (6)
C50.0143 (8)0.0131 (7)0.0223 (8)−0.0014 (6)−0.0039 (6)−0.0051 (6)
C60.0176 (8)0.0133 (7)0.0198 (8)0.0000 (6)−0.0030 (6)−0.0019 (6)
C70.0143 (8)0.0132 (7)0.0189 (7)0.0003 (6)−0.0029 (6)−0.0023 (6)
C80.0127 (8)0.0122 (7)0.0191 (8)0.0004 (6)−0.0031 (6)−0.0034 (6)
C90.0151 (8)0.0102 (7)0.0191 (7)0.0001 (6)−0.0027 (6)0.0000 (6)
C100.0139 (8)0.0082 (7)0.0212 (8)0.0018 (6)−0.0037 (6)−0.0034 (6)
C110.0140 (8)0.0114 (7)0.0179 (7)0.0020 (6)−0.0023 (6)−0.0037 (6)
C120.0177 (8)0.0099 (7)0.0187 (8)0.0003 (6)−0.0032 (6)−0.0003 (6)
C130.0130 (8)0.0076 (7)0.0234 (8)0.0008 (6)−0.0026 (6)−0.0037 (6)
C140.0265 (10)0.0130 (7)0.0211 (8)0.0038 (7)−0.0058 (7)−0.0028 (6)
C150.0365 (11)0.0087 (7)0.0243 (8)−0.0006 (7)−0.0105 (8)−0.0002 (6)
C160.0240 (9)0.0128 (7)0.0171 (7)0.0008 (6)−0.0046 (7)−0.0007 (6)
C170.0281 (10)0.0094 (7)0.0237 (8)0.0011 (6)−0.0068 (7)−0.0005 (6)
S10.0190 (2)0.01144 (19)0.0263 (2)−0.00110 (15)−0.00810 (17)0.00317 (15)
O40.0422 (9)0.0235 (7)0.0317 (7)−0.0056 (6)−0.0193 (6)0.0066 (5)
O50.0217 (7)0.0145 (6)0.0458 (8)0.0037 (5)−0.0020 (6)0.0016 (5)
O60.0238 (7)0.0155 (6)0.0354 (7)−0.0045 (5)−0.0081 (6)0.0038 (5)
O70.0276 (7)0.0102 (5)0.0219 (6)0.0033 (5)−0.0037 (5)−0.0008 (4)
C180.0233 (9)0.0126 (7)0.0182 (7)−0.0006 (6)−0.0029 (7)−0.0027 (6)
C190.0211 (9)0.0113 (7)0.0221 (8)0.0002 (6)−0.0034 (7)−0.0052 (6)
C200.0149 (8)0.0111 (7)0.0230 (8)−0.0015 (6)−0.0057 (6)−0.0009 (6)
C210.0186 (9)0.0164 (8)0.0185 (8)−0.0024 (6)−0.0024 (6)−0.0018 (6)
C220.0187 (8)0.0132 (7)0.0214 (8)0.0009 (6)−0.0023 (7)−0.0052 (6)
C230.0167 (8)0.0089 (7)0.0223 (8)0.0000 (6)−0.0053 (6)−0.0001 (6)
C240.0334 (11)0.0155 (8)0.0234 (9)0.0041 (7)−0.0067 (8)0.0016 (7)
O1W0.0200 (7)0.0185 (6)0.0297 (7)0.0000 (6)−0.0035 (6)−0.0046 (5)
O1—C101.3789 (18)C14—H14C0.9600
O1—C151.4194 (19)C15—H15A0.9600
O2—C111.3620 (19)C15—H15B0.9600
O2—C161.4366 (19)C15—H15C0.9600
O3—C131.3736 (18)C16—H16A0.9600
O3—C171.4335 (19)C16—H16B0.9600
N1—C11.359 (2)C16—H16C0.9600
N1—C51.375 (2)C17—H17A0.9600
N1—C141.477 (2)C17—H17B0.9600
C1—C21.368 (2)C17—H17C0.9600
C1—H1A0.9300S1—O41.4518 (14)
C2—C31.400 (2)S1—O61.4602 (13)
C2—H2A0.9300S1—O51.4603 (14)
C3—C41.376 (2)S1—C201.7730 (16)
C3—H3A0.9300O7—C231.3710 (18)
C4—C51.405 (2)O7—C241.431 (2)
C4—H4A0.9300C18—C231.395 (2)
C5—C61.446 (2)C18—C191.395 (2)
C6—C71.352 (2)C18—H18A0.9300
C6—H6A0.9300C19—C201.385 (2)
C7—C81.448 (2)C19—H19A0.9300
C7—H7A0.9300C20—C211.396 (2)
C8—C131.409 (2)C21—C221.387 (2)
C8—C91.418 (2)C21—H21A0.9300
C9—C101.379 (2)C22—C231.396 (2)
C9—H9A0.9300C22—H22A0.9300
C10—C111.405 (2)C24—H24A0.9600
C11—C121.389 (2)C24—H24B0.9600
C12—C131.394 (2)C24—H24C0.9600
C12—H12A0.9300O1W—H2W10.80 (3)
C14—H14A0.9600O1W—H1W10.84 (3)
C14—H14B0.9600
C10—O1—C15115.80 (12)O1—C15—H15A109.5
C11—O2—C16116.97 (12)O1—C15—H15B109.5
C13—O3—C17117.46 (12)H15A—C15—H15B109.5
C1—N1—C5122.06 (14)O1—C15—H15C109.5
C1—N1—C14117.55 (13)H15A—C15—H15C109.5
C5—N1—C14120.39 (13)H15B—C15—H15C109.5
N1—C1—C2121.19 (15)O2—C16—H16A109.5
N1—C1—H1A119.4O2—C16—H16B109.5
C2—C1—H1A119.4H16A—C16—H16B109.5
C1—C2—C3118.52 (15)O2—C16—H16C109.5
C1—C2—H2A120.7H16A—C16—H16C109.5
C3—C2—H2A120.7H16B—C16—H16C109.5
C4—C3—C2120.05 (16)O3—C17—H17A109.5
C4—C3—H3A120.0O3—C17—H17B109.5
C2—C3—H3A120.0H17A—C17—H17B109.5
C3—C4—C5120.90 (15)O3—C17—H17C109.5
C3—C4—H4A119.5H17A—C17—H17C109.5
C5—C4—H4A119.5H17B—C17—H17C109.5
N1—C5—C4117.27 (14)O4—S1—O6112.62 (8)
N1—C5—C6118.25 (14)O4—S1—O5114.15 (9)
C4—C5—C6124.48 (14)O6—S1—O5111.56 (8)
C7—C6—C5123.58 (15)O4—S1—C20106.30 (8)
C7—C6—H6A118.2O6—S1—C20105.60 (7)
C5—C6—H6A118.2O5—S1—C20105.85 (8)
C6—C7—C8127.96 (15)C23—O7—C24117.05 (13)
C6—C7—H7A116.0C23—C18—C19118.51 (15)
C8—C7—H7A116.0C23—C18—H18A120.7
C13—C8—C9117.33 (14)C19—C18—H18A120.7
C13—C8—C7125.88 (14)C20—C19—C18121.16 (15)
C9—C8—C7116.76 (14)C20—C19—H19A119.4
C10—C9—C8122.01 (14)C18—C19—H19A119.4
C10—C9—H9A119.0C19—C20—C21119.53 (15)
C8—C9—H9A119.0C19—C20—S1120.26 (12)
O1—C10—C9125.62 (14)C21—C20—S1120.06 (13)
O1—C10—C11115.21 (13)C22—C21—C20120.38 (15)
C9—C10—C11119.17 (14)C22—C21—H21A119.8
O2—C11—C12123.81 (14)C20—C21—H21A119.8
O2—C11—C10115.77 (13)C21—C22—C23119.36 (15)
C12—C11—C10120.41 (14)C21—C22—H22A120.3
C11—C12—C13120.01 (14)C23—C22—H22A120.3
C11—C12—H12A120.0O7—C23—C18123.36 (15)
C13—C12—H12A120.0O7—C23—C22115.59 (14)
O3—C13—C12121.44 (14)C18—C23—C22121.05 (15)
O3—C13—C8117.52 (14)O7—C24—H24A109.5
C12—C13—C8121.04 (14)O7—C24—H24B109.5
N1—C14—H14A109.5H24A—C24—H24B109.5
N1—C14—H14B109.5O7—C24—H24C109.5
H14A—C14—H14B109.5H24A—C24—H24C109.5
N1—C14—H14C109.5H24B—C24—H24C109.5
H14A—C14—H14C109.5H2W1—O1W—H1W1109 (3)
H14B—C14—H14C109.5
C5—N1—C1—C20.0 (3)O2—C11—C12—C13−178.62 (15)
C14—N1—C1—C2−179.20 (16)C10—C11—C12—C131.1 (3)
N1—C1—C2—C3−0.6 (3)C17—O3—C13—C120.7 (2)
C1—C2—C3—C40.3 (3)C17—O3—C13—C8−179.24 (14)
C2—C3—C4—C50.7 (3)C11—C12—C13—O3179.71 (15)
C1—N1—C5—C40.9 (2)C11—C12—C13—C8−0.3 (3)
C14—N1—C5—C4−179.92 (15)C9—C8—C13—O3179.62 (14)
C1—N1—C5—C6−178.33 (15)C7—C8—C13—O3−2.5 (2)
C14—N1—C5—C60.8 (2)C9—C8—C13—C12−0.4 (2)
C3—C4—C5—N1−1.2 (2)C7—C8—C13—C12177.53 (16)
C3—C4—C5—C6177.98 (16)C23—C18—C19—C200.5 (3)
N1—C5—C6—C7164.26 (17)C18—C19—C20—C21−0.6 (3)
C4—C5—C6—C7−14.9 (3)C18—C19—C20—S1175.15 (13)
C5—C6—C7—C8−174.98 (16)O4—S1—C20—C19153.77 (14)
C6—C7—C8—C13−2.2 (3)O6—S1—C20—C19−86.39 (15)
C6—C7—C8—C9175.70 (17)O5—S1—C20—C1932.02 (16)
C13—C8—C9—C100.2 (2)O4—S1—C20—C21−30.55 (17)
C7—C8—C9—C10−177.85 (15)O6—S1—C20—C2189.30 (15)
C15—O1—C10—C96.4 (2)O5—S1—C20—C21−152.29 (14)
C15—O1—C10—C11−174.21 (15)C19—C20—C21—C220.0 (3)
C8—C9—C10—O1179.91 (15)S1—C20—C21—C22−175.73 (13)
C8—C9—C10—C110.6 (3)C20—C21—C22—C230.6 (3)
C16—O2—C11—C121.7 (2)C24—O7—C23—C181.2 (2)
C16—O2—C11—C10−178.06 (14)C24—O7—C23—C22−179.31 (15)
O1—C10—C11—O2−0.9 (2)C19—C18—C23—O7179.53 (15)
C9—C10—C11—O2178.52 (15)C19—C18—C23—C220.1 (3)
O1—C10—C11—C12179.34 (15)C21—C22—C23—O7179.87 (15)
C9—C10—C11—C12−1.2 (2)C21—C22—C23—C18−0.6 (3)
D—H···AD—HH···AD···AD—H···A
O1W—H2W1···O60.80 (3)2.08 (3)2.8703 (19)175 (3)
O1W—H1W1···O5i0.85 (3)1.98 (3)2.8233 (19)173 (2)
C9—H9A···O40.932.533.445 (2)167
C14—H14A···O1Wii0.962.323.262 (2)168
C14—H14C···O1iii0.962.543.487 (2)168
C16—H16A···O7iv0.962.533.388 (2)149
C16—H16B···O5iii0.962.543.408 (2)150
C16—H16C···O6v0.962.443.371 (2)163
C17—H17C···O4iii0.962.473.419 (2)168
C18—H18A···O1Wvi0.932.433.354 (2)171
C22—H22A···O2iv0.932.363.281 (2)170
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
O1W—H2W1⋯O60.80 (3)2.08 (3)2.8703 (19)175 (3)
O1W—H1W1⋯O5i0.85 (3)1.98 (3)2.8233 (19)173 (2)
C9—H9A⋯O40.932.533.445 (2)167
C14—H14A⋯O1Wii0.962.323.262 (2)168
C14—H14C⋯O1iii0.962.543.487 (2)168
C16—H16A⋯O7iv0.962.533.388 (2)149
C16—H16B⋯O5iii0.962.543.408 (2)150
C16—H16C⋯O6v0.962.443.371 (2)163
C17—H17C⋯O4iii0.962.473.419 (2)168
C18—H18A⋯O1Wvi0.932.433.354 (2)171
C22—H22A⋯O2iv0.932.363.281 (2)170

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

  6 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Synthesis, structure and in vitro antibacterial activities of new hybrid disinfectants quaternary ammonium compounds: pyridinium and quinolinium stilbene benzenesulfonates.

Authors:  Kullapa Chanawanno; Suchada Chantrapromma; Theerasak Anantapong; Akkharawit Kanjana-Opas; Hoong-Kun Fun
Journal:  Eur J Med Chem       Date:  2010-06-17       Impact factor: 6.514

3.  (E)-2-[4-(Dimethyl-amino)-styr-yl]-1-methyl-pyridinium 4-methyl-benzene-sulfonate monohydrate.

Authors:  Suchada Chantrapromma; Kullapa Chanawanno; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-07-10

4.  (E)-1-Methyl-2-styrylpyridinium iodide.

Authors:  Hoong-Kun Fun; Kullapa Chanawanno; Suchada Chantrapromma
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-07-18

5.  1-Methyl-2-[(E)-2,4,5-trimeth-oxy-styr-yl]-pyridinium iodide.

Authors:  Charoensak Mueangkeaw; Suchada Chantrapromma; Pumsak Ruanwas; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-11-06

6.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  6 in total
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1.  1-Methyl-2-[(E)-2,4,5-trimeth-oxy-styr-yl]-pyridinium benzene-sulfonate mono-hydrate.

Authors:  Hoong-Kun Fun; Suchada Chantrapromma; Pumsak Ruanwas; Teerasak Anantapong; Nawong Boonnak
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2012-02-29
  1 in total

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