Literature DB >> 21580623

2-Amino-5-chloro-pyridinium trifluoro-acetate.

Madhukar Hemamalini1, Hoong-Kun Fun.   

Abstract

The asymmetric unit of the title salt, C(5)H(6)ClN(2) (+)·C(2)F(3)O(2) (-), contains two independent 2-amino-5-chloro-pyridinium cations and two independent trifluoro-acetate anions. The F atoms of both anions are disordered over two sets of positions, with occupancy ratios of 0.672 (12):0.328 (12) and 0.587 (15):0.413 (15). In the crystal, the cations and anions are linked via N-H⋯O and C-H⋯O hydrogen bonds, forming a two-dimensional network parallel to (001).

Entities:  

Year:  2010        PMID: 21580623      PMCID: PMC2983973          DOI: 10.1107/S1600536810008196

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


Related literature

For background to the chemistry of substituted pyridines, see: Pozharski et al. (1997 ▶); Katritzky et al. (1996 ▶). For related structures, see: Pourayoubi et al. (2007 ▶); Hemamalini & Fun (2010a ▶,b ▶,c ▶). For details of hydrogen bonding, see: Jeffrey & Saenger (1991 ▶); Jeffrey (1997 ▶); Scheiner (1997 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For bond-length data, see: Allen et al. (1987 ▶).

Experimental

Crystal data

C5H6ClN2C2F3O2 M = 242.59 Monoclinic, a = 5.0377 (1) Å b = 11.2923 (2) Å c = 17.5386 (3) Å β = 90.001 (1)° V = 997.72 (3) Å3 Z = 4 Mo Kα radiation μ = 0.41 mm−1 T = 296 K 0.43 × 0.26 × 0.14 mm

Data collection

Bruker SMART APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2009 ▶) T min = 0.842, T max = 0.945 17652 measured reflections 4388 independent reflections 3191 reflections with I > 2σ(I) R int = 0.027

Refinement

R[F 2 > 2σ(F 2)] = 0.036 wR(F 2) = 0.094 S = 1.03 4388 reflections 375 parameters 110 restraints H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.12 e Å−3 Δρmin = −0.15 e Å−3 Absolute structure: Flack (1983 ▶), 2096 Friedel pairs Flack parameter: 0.01 (7) Data collection: APEX2 (Bruker, 2009 ▶); cell refinement: 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 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536810008196/ci5043sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536810008196/ci5043Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C5H6ClN2+·C2F3O2F(000) = 488
Mr = 242.59Dx = 1.615 Mg m3
Monoclinic, PcMo Kα radiation, λ = 0.71073 Å
Hall symbol: P -2ycCell parameters from 6764 reflections
a = 5.0377 (1) Åθ = 2.9–23.0°
b = 11.2923 (2) ŵ = 0.41 mm1
c = 17.5386 (3) ÅT = 296 K
β = 90.001 (1)°Blcok, colourless
V = 997.72 (3) Å30.43 × 0.26 × 0.14 mm
Z = 4
Bruker SMART APEXII CCD area-detector diffractometer4388 independent reflections
Radiation source: fine-focus sealed tube3191 reflections with I > 2σ(I)
graphiteRint = 0.027
φ and ω scansθmax = 27.5°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2009)h = −6→6
Tmin = 0.842, Tmax = 0.945k = −14→14
17652 measured reflectionsl = −22→22
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.036H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.094w = 1/[σ2(Fo2) + (0.0449P)2 + 0.0781P] where P = (Fo2 + 2Fc2)/3
S = 1.03(Δ/σ)max = 0.001
4388 reflectionsΔρmax = 0.12 e Å3
375 parametersΔρmin = −0.15 e Å3
110 restraintsAbsolute structure: Flack (1983), 2096 Friedel pairs
Primary atom site location: structure-invariant direct methodsFlack parameter: 0.01 (7)
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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*/UeqOcc. (<1)
Cl1A1.1299 (2)0.65347 (8)0.53508 (6)0.0863 (3)
N1A0.6452 (5)0.84270 (19)0.40858 (15)0.0509 (6)
N2A0.5936 (6)1.0402 (2)0.38078 (18)0.0688 (7)
C1A0.7219 (6)0.9568 (2)0.41821 (16)0.0535 (7)
C2A0.9320 (6)0.9791 (3)0.46873 (17)0.0620 (7)
C3A1.0548 (7)0.8880 (3)0.50499 (18)0.0657 (8)
C4A0.9711 (6)0.7707 (2)0.49139 (16)0.0598 (7)
C5A0.7678 (6)0.7505 (3)0.44427 (18)0.0547 (7)
Cl1B0.6300 (2)0.84657 (8)0.66202 (6)0.0862 (3)
N1B0.1456 (5)0.65696 (18)0.78845 (16)0.0515 (6)
N2B0.0936 (6)0.4597 (2)0.81654 (19)0.0696 (7)
C1B0.2208 (6)0.5431 (2)0.77885 (16)0.0536 (7)
C2B0.4312 (6)0.5216 (3)0.72826 (17)0.0622 (7)
C3B0.5552 (7)0.6116 (3)0.69219 (18)0.0647 (8)
C4B0.4720 (6)0.7291 (2)0.70553 (16)0.0592 (7)
C5B0.2675 (6)0.7496 (2)0.75301 (17)0.0543 (7)
F1A0.1120 (15)0.2688 (5)0.6659 (3)0.103 (2)0.672 (12)
F2A−0.2319 (10)0.2039 (11)0.7180 (3)0.145 (3)0.672 (12)
F3A−0.002 (2)0.0953 (5)0.6438 (3)0.133 (3)0.672 (12)
F1C−0.050 (4)0.2829 (7)0.6917 (10)0.120 (5)0.328 (12)
F2C−0.217 (2)0.1179 (12)0.6924 (8)0.113 (4)0.328 (12)
F3C0.135 (3)0.1402 (18)0.6367 (6)0.143 (6)0.328 (12)
O1A0.2546 (5)0.21708 (17)0.80805 (12)0.0645 (5)
O2A0.1855 (6)0.0286 (2)0.77827 (16)0.0847 (7)
C6A0.1664 (6)0.1353 (3)0.76755 (19)0.0562 (7)
C7A0.0082 (7)0.1732 (3)0.69751 (19)0.0725 (9)
F1B0.6266 (18)0.7635 (7)1.0334 (4)0.106 (2)0.587 (15)
F2B0.2762 (14)0.7160 (13)0.9780 (4)0.134 (3)0.587 (15)
F3B0.473 (3)0.5940 (5)1.0508 (5)0.129 (3)0.587 (15)
F1D0.490 (4)0.7839 (5)1.0133 (8)0.120 (4)0.413 (15)
F2D0.2692 (17)0.6301 (14)0.9986 (7)0.123 (4)0.413 (15)
F3D0.615 (3)0.6227 (14)1.0603 (5)0.134 (4)0.413 (15)
O1B0.7544 (5)0.71703 (17)0.88936 (12)0.0642 (5)
O2B0.6855 (6)0.5286 (2)0.91889 (15)0.0840 (7)
C6B0.6665 (6)0.6354 (3)0.92942 (19)0.0560 (7)
C7B0.5093 (7)0.6735 (3)0.99991 (19)0.0718 (9)
H1NA0.507 (7)0.829 (3)0.3734 (17)0.059 (8)*
H2NA0.470 (6)1.021 (3)0.3463 (17)0.073 (10)*
H3NA0.652 (7)1.112 (2)0.388 (2)0.071 (10)*
H2AA0.998 (8)1.056 (4)0.477 (2)0.081 (10)*
H3AA1.194 (7)0.905 (3)0.543 (2)0.073 (10)*
H5AA0.694 (6)0.673 (3)0.4342 (16)0.050 (7)*
H1NB0.023 (7)0.672 (3)0.8221 (18)0.059 (9)*
H2NB−0.023 (5)0.479 (2)0.8537 (14)0.057 (8)*
H3NB0.143 (8)0.386 (2)0.811 (2)0.079 (11)*
H2BA0.494 (7)0.448 (3)0.719 (2)0.077 (10)*
H3BA0.701 (8)0.598 (4)0.656 (2)0.081 (11)*
H5BA0.192 (7)0.826 (3)0.7621 (19)0.065 (9)*
U11U22U33U12U13U23
Cl1A0.0909 (6)0.0709 (6)0.0971 (6)0.0149 (5)−0.0160 (5)0.0077 (5)
N1A0.0552 (15)0.0349 (13)0.0625 (15)−0.0015 (9)−0.0004 (12)−0.0045 (10)
N2A0.082 (2)0.0340 (13)0.0903 (19)−0.0087 (13)−0.0106 (16)0.0013 (13)
C1A0.0606 (17)0.0382 (15)0.0618 (17)−0.0065 (12)0.0072 (14)−0.0057 (12)
C2A0.0690 (19)0.0444 (15)0.0727 (18)−0.0111 (14)0.0036 (15)−0.0073 (13)
C3A0.065 (2)0.067 (2)0.0655 (19)−0.0096 (16)−0.0006 (16)−0.0126 (15)
C4A0.0682 (19)0.0514 (15)0.0597 (15)0.0034 (14)0.0031 (14)−0.0035 (12)
C5A0.0636 (19)0.0372 (14)0.0634 (16)−0.0017 (13)0.0059 (14)−0.0033 (12)
Cl1B0.0915 (6)0.0693 (6)0.0976 (6)−0.0155 (5)0.0171 (5)0.0067 (5)
N1B0.0584 (16)0.0329 (13)0.0632 (16)0.0015 (10)0.0008 (12)−0.0044 (10)
N2B0.084 (2)0.0342 (13)0.0906 (19)0.0067 (13)0.0139 (16)0.0000 (13)
C1B0.0582 (17)0.0381 (16)0.0644 (18)0.0067 (12)−0.0075 (14)−0.0054 (12)
C2B0.0684 (19)0.0443 (15)0.0737 (18)0.0119 (14)−0.0043 (15)−0.0100 (13)
C3B0.067 (2)0.0648 (19)0.0627 (18)0.0089 (16)0.0010 (16)−0.0096 (15)
C4B0.0669 (18)0.0516 (15)0.0592 (15)−0.0050 (14)−0.0034 (14)−0.0023 (12)
C5B0.0641 (19)0.0370 (14)0.0617 (16)0.0009 (13)−0.0068 (14)−0.0045 (12)
F1A0.137 (5)0.087 (3)0.085 (3)−0.028 (3)−0.016 (2)0.036 (2)
F2A0.079 (3)0.232 (8)0.126 (4)0.045 (4)−0.002 (2)0.037 (5)
F3A0.211 (7)0.091 (3)0.096 (3)−0.004 (3)−0.049 (4)−0.036 (2)
F1C0.159 (10)0.061 (4)0.141 (8)0.016 (6)−0.064 (7)−0.002 (5)
F2C0.088 (6)0.104 (7)0.147 (8)−0.016 (5)−0.041 (5)0.011 (6)
F3C0.148 (9)0.204 (11)0.078 (6)−0.006 (7)0.005 (6)−0.007 (7)
O1A0.0824 (15)0.0373 (11)0.0737 (13)0.0111 (9)−0.0104 (11)−0.0062 (9)
O2A0.1066 (19)0.0374 (13)0.110 (2)0.0061 (12)−0.0211 (15)−0.0014 (12)
C6A0.0601 (18)0.0410 (16)0.0676 (18)0.0045 (13)0.0056 (13)−0.0019 (13)
C7A0.089 (3)0.0580 (19)0.071 (2)−0.0068 (18)−0.0022 (18)−0.0009 (15)
F1B0.122 (5)0.110 (5)0.085 (3)−0.021 (3)0.008 (3)−0.041 (3)
F2B0.086 (4)0.196 (8)0.122 (4)0.049 (5)0.006 (3)−0.022 (5)
F3B0.188 (8)0.085 (3)0.116 (4)−0.012 (4)0.061 (5)0.028 (3)
F1D0.174 (9)0.052 (3)0.134 (7)0.006 (5)0.077 (7)−0.007 (4)
F2D0.072 (4)0.141 (8)0.156 (7)−0.012 (5)0.030 (4)−0.026 (6)
F3D0.150 (8)0.184 (9)0.066 (4)−0.001 (6)0.001 (5)0.033 (5)
O1B0.0833 (15)0.0377 (11)0.0715 (13)0.0099 (9)0.0124 (11)0.0067 (9)
O2B0.1067 (19)0.0370 (12)0.1083 (19)0.0034 (12)0.0226 (14)0.0008 (12)
C6B0.0605 (18)0.0381 (16)0.0696 (18)0.0039 (13)−0.0061 (13)0.0001 (13)
C7B0.089 (3)0.0571 (19)0.070 (2)−0.0047 (18)0.0054 (18)0.0018 (15)
Cl1A—C4A1.726 (3)C2B—H2BA0.90 (4)
N1A—C1A1.355 (4)C3B—C4B1.411 (5)
N1A—C5A1.362 (4)C3B—H3BA0.98 (4)
N1A—H1NA0.94 (3)C4B—C5B1.345 (4)
N2A—C1A1.317 (4)C5B—H5BA0.95 (4)
N2A—H2NA0.90 (2)F1A—C7A1.321 (4)
N2A—H3NA0.87 (2)F2A—C7A1.308 (5)
C1A—C2A1.403 (4)F3A—C7A1.290 (5)
C2A—C3A1.358 (5)F1C—C7A1.276 (7)
C2A—H2AA0.94 (4)F2C—C7A1.299 (7)
C3A—C4A1.411 (5)F3C—C7A1.299 (7)
C3A—H3AA0.98 (4)O1A—C6A1.247 (4)
C4A—C5A1.336 (4)O2A—C6A1.223 (4)
C5A—H5AA0.97 (3)C6A—C7A1.525 (5)
Cl1B—C4B1.725 (3)F1B—C7B1.314 (5)
N1B—C1B1.351 (4)F2B—C7B1.325 (5)
N1B—C5B1.363 (4)F3B—C7B1.280 (5)
N1B—H1NB0.87 (3)F1D—C7B1.272 (6)
N2B—C1B1.317 (4)F2D—C7B1.306 (6)
N2B—H2NB0.902 (19)F3D—C7B1.317 (7)
N2B—H3NB0.87 (2)O1B—C6B1.240 (4)
C1B—C2B1.404 (4)O2B—C6B1.224 (4)
C2B—C3B1.351 (5)C6B—C7B1.530 (5)
C1A—N1A—C5A122.7 (3)C2B—C3B—C4B119.5 (3)
C1A—N1A—H1NA116.9 (18)C2B—C3B—H3BA122 (3)
C5A—N1A—H1NA120.4 (18)C4B—C3B—H3BA119 (3)
C1A—N2A—H2NA120 (2)C5B—C4B—C3B119.5 (3)
C1A—N2A—H3NA115 (3)C5B—C4B—Cl1B119.7 (2)
H2NA—N2A—H3NA124 (3)C3B—C4B—Cl1B120.8 (3)
N2A—C1A—N1A118.5 (3)C4B—C5B—N1B119.7 (3)
N2A—C1A—C2A123.8 (3)C4B—C5B—H5BA124 (2)
N1A—C1A—C2A117.7 (3)N1B—C5B—H5BA116 (2)
C3A—C2A—C1A120.2 (3)O2A—C6A—O1A127.9 (3)
C3A—C2A—H2AA118 (2)O2A—C6A—C7A116.2 (3)
C1A—C2A—H2AA122 (2)O1A—C6A—C7A115.9 (3)
C2A—C3A—C4A119.7 (3)F1C—C7A—F3C109.0 (10)
C2A—C3A—H3AA120 (2)F1C—C7A—F2C105.1 (8)
C4A—C3A—H3AA121 (2)F3C—C7A—F2C103.6 (9)
C5A—C4A—C3A119.6 (3)F3A—C7A—F2A110.2 (6)
C5A—C4A—Cl1A119.9 (2)F3A—C7A—F1A105.4 (5)
C3A—C4A—Cl1A120.4 (3)F2A—C7A—F1A105.4 (5)
C4A—C5A—N1A120.1 (3)F3A—C7A—C6A114.6 (4)
C4A—C5A—H5AA124.3 (18)F2A—C7A—C6A109.6 (3)
N1A—C5A—H5AA115.6 (18)F1A—C7A—C6A111.1 (3)
C1B—N1B—C5B123.2 (3)O2B—C6B—O1B128.2 (3)
C1B—N1B—H1NB118 (2)O2B—C6B—C7B116.1 (3)
C5B—N1B—H1NB118 (2)O1B—C6B—C7B115.7 (3)
C1B—N2B—H2NB120.5 (18)F1D—C7B—F2D107.5 (7)
C1B—N2B—H3NB119 (3)F3B—C7B—F1B107.1 (6)
H2NB—N2B—H3NB119 (3)F1D—C7B—F3D108.0 (9)
N2B—C1B—N1B118.8 (3)F2D—C7B—F3D103.0 (7)
N2B—C1B—C2B124.1 (3)F3B—C7B—F2B109.3 (6)
N1B—C1B—C2B117.1 (3)F1B—C7B—F2B104.3 (5)
C3B—C2B—C1B121.0 (3)F3B—C7B—C6B116.1 (4)
C3B—C2B—H2BA117 (2)F1B—C7B—C6B110.3 (4)
C1B—C2B—H2BA122 (2)F2B—C7B—C6B109.0 (4)
C5A—N1A—C1A—N2A179.3 (3)O2A—C6A—C7A—F3A−24.8 (7)
C5A—N1A—C1A—C2A−1.7 (4)O1A—C6A—C7A—F3A157.0 (6)
N2A—C1A—C2A—C3A−179.8 (3)O2A—C6A—C7A—F3C−66.6 (11)
N1A—C1A—C2A—C3A1.2 (4)O1A—C6A—C7A—F3C115.3 (11)
C1A—C2A—C3A—C4A0.3 (5)O2A—C6A—C7A—F2C47.5 (10)
C2A—C3A—C4A—C5A−1.5 (5)O1A—C6A—C7A—F2C−130.6 (9)
C2A—C3A—C4A—Cl1A178.4 (2)O2A—C6A—C7A—F2A99.7 (7)
C3A—C4A—C5A—N1A1.1 (4)O1A—C6A—C7A—F2A−78.4 (7)
Cl1A—C4A—C5A—N1A−178.8 (2)O2A—C6A—C7A—F1A−144.2 (5)
C1A—N1A—C5A—C4A0.5 (4)O1A—C6A—C7A—F1A37.6 (5)
C5B—N1B—C1B—N2B178.9 (3)O2B—C6B—C7B—F1D178.7 (12)
C5B—N1B—C1B—C2B−1.5 (4)O1B—C6B—C7B—F1D−2.6 (12)
N2B—C1B—C2B—C3B−179.1 (3)O2B—C6B—C7B—F3B17.6 (8)
N1B—C1B—C2B—C3B1.3 (4)O1B—C6B—C7B—F3B−163.7 (8)
C1B—C2B—C3B—C4B0.0 (5)O2B—C6B—C7B—F2D−56.8 (10)
C2B—C3B—C4B—C5B−1.1 (5)O1B—C6B—C7B—F2D121.9 (9)
C2B—C3B—C4B—Cl1B178.7 (3)O2B—C6B—C7B—F1B139.6 (6)
C3B—C4B—C5B—N1B0.9 (4)O1B—C6B—C7B—F1B−41.6 (6)
Cl1B—C4B—C5B—N1B−178.8 (2)O2B—C6B—C7B—F3D55.7 (9)
C1B—N1B—C5B—C4B0.4 (4)O1B—C6B—C7B—F3D−125.6 (9)
O2A—C6A—C7A—F1C169.3 (13)O2B—C6B—C7B—F2B−106.4 (8)
O1A—C6A—C7A—F1C−8.9 (13)O1B—C6B—C7B—F2B72.4 (8)
D—H···AD—HH···AD···AD—H···A
N1A—H1NA···O1Ai0.94 (3)1.79 (3)2.727 (3)173 (3)
N2A—H2NA···O2Ai0.90 (3)1.95 (3)2.840 (4)175 (3)
N2A—H3NA···O1Bii0.87 (3)2.00 (2)2.863 (3)171 (4)
N1B—H1NB···O1Biii0.87 (3)1.87 (3)2.734 (3)175 (3)
N2B—H2NB···O2Biii0.90 (2)1.94 (2)2.838 (4)170 (2)
N2B—H3NB···O1A0.87 (3)1.99 (2)2.861 (3)175 (4)
C5A—H5AA···O2Bi0.97 (3)2.29 (3)3.210 (4)158 (3)
C5B—H5BA···O2Aiv0.96 (3)2.31 (3)3.208 (3)157 (3)
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N1A—H1NA⋯O1Ai0.94 (3)1.79 (3)2.727 (3)173 (3)
N2A—H2NA⋯O2Ai0.90 (3)1.95 (3)2.840 (4)175 (3)
N2A—H3NA⋯O1Bii0.87 (3)2.00 (2)2.863 (3)171 (4)
N1B—H1NB⋯O1Biii0.87 (3)1.87 (3)2.734 (3)175 (3)
N2B—H2NB⋯O2Biii0.90 (2)1.94 (2)2.838 (4)170 (2)
N2B—H3NB⋯O1A0.87 (3)1.99 (2)2.861 (3)175 (4)
C5A—H5AA⋯O2Bi0.97 (3)2.29 (3)3.210 (4)158 (3)
C5B—H5BA⋯O2Aiv0.96 (3)2.31 (3)3.208 (3)157 (3)

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

  5 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.  2-Amino-5-chloro-pyridinium 4-hydroxy-benzoate.

Authors:  Madhukar Hemamalini; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-02-06

3.  2-Amino-5-chloro-pyridine-benzoic acid (1/1).

Authors:  Madhukar Hemamalini; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-02-10

4.  2-Amino-5-chloro-pyridinium hydrogen succinate.

Authors:  Madhukar Hemamalini; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-01-30

5.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  5 in total
  3 in total

1.  2-(Morpholinium-4-yl)ethyl-ammonium sulfate methanol monosolvate.

Authors:  Ye Bi
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-03-27

2.  2-Amino-5-chloro-pyridinium salicylate.

Authors:  Madhukar Hemamalini; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-05-22

3.  3-Amino-1H-pyrazol-2-ium tri-fluoro-acetate.

Authors:  T S Yamuna; Jerry P Jasinski; Derek R Scadova; H S Yathirajan; Manpreet Kaur
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-08-14
  3 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.