organic compounds
Benzotriazolium picrate
aYun Nan Chemical Research Institute, Yun Tian Hua Group, Kunming 650028, People's Republic of China
*Correspondence e-mail: ji_liji@126.com
In the 6H6N3+·C6H2N3O7−, anions and cations are linked into chains along [010] by intermolecular N—H⋯O hydrogen bonds. These chains are further stabilized by weak C—H⋯O hydrogen bonds and π–π stacking interactions with a centroid–centroid distance of 3.908 (1) Å.
of the title compound, CRelated literature
For applications of imidazolium-based picrate salts, see: Sikder & Sikder (2004). For related structures, see: Jin et al. (2008); Hashizume et al. (2001); Li (2007); Moreno-Fuquen et al. (2011); Pi et al. (2009).
Experimental
Crystal data
|
Refinement
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Data collection: SMART (Bruker, 2001); cell 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: PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
10.1107/S1600536811018307/lh5251sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811018307/lh5251Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811018307/lh5251Isup3.cml
A mixture of benztriazole (0.238 g, 2 mmol) and picric acid (0.458 g, 2 mmol) was dissolved in 30 ml water at ambient condition. The resultant solution was allowed to stand for two weeks. Yellow needles were obtained at the bottom of the vessel.
All C-bound hydrogen atoms were included in their ideal positions and refined with C—H= 0.93Å .The Uiso(H) values were set 1.2Ueq(C). The nitrogen bonded hydrogen atoms were found in the difference Fourier maps and then refined freely with Uiso(H)=1.2Ueq(N).
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C6H6N3+·C6H2N3O7− | F(000) = 712 |
Mr = 348.24 | Dx = 1.711 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1240 reflections |
a = 14.4113 (15) Å | θ = 2.8–20.3° |
b = 3.7608 (4) Å | µ = 0.14 mm−1 |
c = 24.941 (3) Å | T = 298 K |
β = 90.598 (2)° | Needle, yellow |
V = 1351.7 (2) Å3 | 0.35 × 0.08 × 0.06 mm |
Z = 4 |
Bruker SMART APEX CCD area-detector diffractometer | 2793 independent reflections |
Radiation source: fine focus sealed Siemens Mo tube | 1772 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.068 |
0.3° wide ω scans | θmax = 26.5°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1997) | h = −18→18 |
Tmin = 0.941, Tmax = 0.991 | k = −4→4 |
10116 measured reflections | l = −28→31 |
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)] = 0.062 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.160 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.075P)2] where P = (Fo2 + 2Fc2)/3 |
2793 reflections | (Δ/σ)max < 0.001 |
232 parameters | Δρmax = 0.26 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C6H6N3+·C6H2N3O7− | V = 1351.7 (2) Å3 |
Mr = 348.24 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 14.4113 (15) Å | µ = 0.14 mm−1 |
b = 3.7608 (4) Å | T = 298 K |
c = 24.941 (3) Å | 0.35 × 0.08 × 0.06 mm |
β = 90.598 (2)° |
Bruker SMART APEX CCD area-detector diffractometer | 2793 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1997) | 1772 reflections with I > 2σ(I) |
Tmin = 0.941, Tmax = 0.991 | Rint = 0.068 |
10116 measured reflections |
R[F2 > 2σ(F2)] = 0.062 | 0 restraints |
wR(F2) = 0.160 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.26 e Å−3 |
2793 reflections | Δρmin = −0.22 e Å−3 |
232 parameters |
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 | ||
C1 | 0.99963 (18) | 0.3370 (8) | 0.66441 (12) | 0.0292 (7) | |
C2 | 1.01146 (18) | 0.4733 (8) | 0.61071 (11) | 0.0306 (7) | |
C3 | 1.09520 (19) | 0.5092 (8) | 0.58563 (12) | 0.0339 (7) | |
H3 | 1.0979 | 0.6016 | 0.5511 | 0.041* | |
C4 | 1.17487 (18) | 0.4073 (8) | 0.61202 (12) | 0.0329 (7) | |
C5 | 1.17278 (19) | 0.2734 (8) | 0.66338 (11) | 0.0318 (7) | |
H5 | 1.2273 | 0.2056 | 0.6809 | 0.038* | |
C6 | 1.08877 (19) | 0.2420 (8) | 0.68823 (11) | 0.0298 (7) | |
N1 | 0.93044 (16) | 0.5892 (7) | 0.57961 (10) | 0.0359 (6) | |
N2 | 1.26389 (18) | 0.4342 (8) | 0.58494 (12) | 0.0447 (7) | |
N3 | 1.09156 (17) | 0.1027 (7) | 0.74265 (10) | 0.0365 (6) | |
C7 | 0.82043 (17) | 0.5020 (7) | 0.87509 (12) | 0.0282 (7) | |
C8 | 0.8186 (2) | 0.4915 (8) | 0.93112 (12) | 0.0377 (8) | |
H8 | 0.7672 | 0.5650 | 0.9504 | 0.045* | |
C9 | 0.8973 (2) | 0.3662 (9) | 0.95568 (12) | 0.0412 (8) | |
H9 | 0.8997 | 0.3555 | 0.9929 | 0.049* | |
C10 | 0.9752 (2) | 0.2525 (9) | 0.92626 (13) | 0.0408 (8) | |
H10 | 1.0272 | 0.1713 | 0.9449 | 0.049* | |
C11 | 0.97677 (19) | 0.2573 (8) | 0.87192 (12) | 0.0365 (8) | |
H11 | 1.0281 | 0.1809 | 0.8528 | 0.044* | |
C12 | 0.89671 (18) | 0.3838 (8) | 0.84644 (11) | 0.0291 (7) | |
N4 | 0.75692 (16) | 0.6019 (7) | 0.83701 (10) | 0.0347 (6) | |
H4 | 0.702 (2) | 0.678 (9) | 0.8423 (12) | 0.042* | |
N5 | 0.78784 (16) | 0.5608 (7) | 0.78832 (10) | 0.0388 (7) | |
N6 | 0.87157 (16) | 0.4287 (7) | 0.79375 (10) | 0.0354 (6) | |
H6 | 0.896 (2) | 0.343 (8) | 0.7615 (13) | 0.043* | |
O1 | 0.92425 (12) | 0.3151 (6) | 0.68863 (8) | 0.0385 (6) | |
O2 | 0.85380 (14) | 0.4837 (7) | 0.59216 (10) | 0.0604 (8) | |
O3 | 0.94256 (15) | 0.7832 (7) | 0.54123 (10) | 0.0577 (7) | |
O4 | 1.26640 (16) | 0.6034 (8) | 0.54315 (11) | 0.0691 (8) | |
O5 | 1.33151 (15) | 0.2909 (8) | 0.60522 (10) | 0.0625 (8) | |
O6 | 1.02722 (16) | −0.0819 (6) | 0.75823 (9) | 0.0497 (6) | |
O7 | 1.15869 (17) | 0.1753 (8) | 0.77088 (10) | 0.0642 (8) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0274 (14) | 0.0287 (17) | 0.0316 (17) | −0.0046 (12) | 0.0038 (12) | −0.0064 (13) |
C2 | 0.0299 (15) | 0.0319 (17) | 0.0301 (17) | −0.0041 (12) | 0.0013 (12) | −0.0065 (13) |
C3 | 0.0373 (16) | 0.0361 (18) | 0.0284 (17) | −0.0073 (14) | 0.0062 (13) | −0.0048 (14) |
C4 | 0.0278 (15) | 0.0390 (18) | 0.0320 (17) | −0.0041 (13) | 0.0066 (12) | −0.0071 (14) |
C5 | 0.0276 (15) | 0.0345 (17) | 0.0332 (18) | 0.0027 (12) | −0.0003 (13) | −0.0070 (14) |
C6 | 0.0340 (15) | 0.0298 (17) | 0.0255 (16) | −0.0003 (13) | 0.0021 (13) | −0.0001 (13) |
N1 | 0.0351 (14) | 0.0390 (16) | 0.0337 (16) | 0.0006 (12) | −0.0004 (12) | 0.0026 (13) |
N2 | 0.0349 (15) | 0.060 (2) | 0.0397 (17) | −0.0089 (14) | 0.0123 (13) | −0.0074 (15) |
N3 | 0.0382 (14) | 0.0397 (16) | 0.0317 (15) | 0.0063 (12) | 0.0051 (12) | 0.0005 (12) |
C7 | 0.0265 (14) | 0.0245 (16) | 0.0337 (17) | −0.0041 (12) | −0.0012 (12) | −0.0025 (13) |
C8 | 0.0354 (16) | 0.044 (2) | 0.0342 (19) | −0.0017 (14) | 0.0082 (14) | −0.0057 (15) |
C9 | 0.0470 (19) | 0.049 (2) | 0.0280 (18) | −0.0047 (16) | −0.0039 (14) | 0.0009 (15) |
C10 | 0.0352 (16) | 0.047 (2) | 0.040 (2) | 0.0036 (14) | −0.0094 (14) | 0.0000 (16) |
C11 | 0.0284 (15) | 0.0410 (19) | 0.040 (2) | 0.0030 (13) | 0.0030 (13) | −0.0049 (15) |
C12 | 0.0281 (14) | 0.0314 (17) | 0.0277 (17) | −0.0056 (12) | 0.0006 (12) | −0.0029 (13) |
N4 | 0.0254 (12) | 0.0407 (16) | 0.0381 (16) | 0.0031 (11) | 0.0025 (12) | −0.0029 (12) |
N5 | 0.0349 (14) | 0.0464 (17) | 0.0349 (16) | 0.0059 (12) | −0.0020 (12) | −0.0040 (13) |
N6 | 0.0336 (14) | 0.0434 (16) | 0.0294 (15) | 0.0026 (12) | 0.0024 (11) | −0.0062 (12) |
O1 | 0.0259 (11) | 0.0570 (15) | 0.0328 (12) | −0.0052 (9) | 0.0082 (9) | −0.0033 (10) |
O2 | 0.0279 (12) | 0.086 (2) | 0.0668 (17) | −0.0040 (12) | 0.0000 (11) | 0.0266 (15) |
O3 | 0.0533 (15) | 0.0726 (19) | 0.0471 (16) | −0.0052 (13) | −0.0047 (12) | 0.0238 (14) |
O4 | 0.0527 (15) | 0.100 (2) | 0.0548 (17) | −0.0080 (14) | 0.0227 (13) | 0.0202 (16) |
O5 | 0.0281 (12) | 0.093 (2) | 0.0662 (18) | 0.0041 (12) | 0.0069 (12) | −0.0023 (15) |
O6 | 0.0542 (14) | 0.0533 (16) | 0.0418 (14) | −0.0085 (12) | 0.0131 (11) | 0.0082 (12) |
O7 | 0.0510 (15) | 0.096 (2) | 0.0457 (16) | −0.0068 (14) | −0.0160 (12) | 0.0166 (14) |
C1—O1 | 1.251 (3) | N3—O6 | 1.225 (3) |
C1—C2 | 1.446 (4) | C7—N4 | 1.365 (4) |
C1—C6 | 1.454 (4) | C7—C12 | 1.390 (4) |
C2—C3 | 1.372 (4) | C7—C8 | 1.398 (4) |
C2—N1 | 1.461 (4) | C8—C9 | 1.366 (4) |
C3—C4 | 1.372 (4) | C8—H8 | 0.9300 |
C3—H3 | 0.9300 | C9—C10 | 1.413 (4) |
C4—C5 | 1.377 (4) | C9—H9 | 0.9300 |
C4—N2 | 1.459 (3) | C10—C11 | 1.356 (4) |
C5—C6 | 1.371 (4) | C10—H10 | 0.9300 |
C5—H5 | 0.9300 | C11—C12 | 1.395 (4) |
C6—N3 | 1.455 (4) | C11—H11 | 0.9300 |
N1—O2 | 1.218 (3) | C12—N6 | 1.370 (4) |
N1—O3 | 1.218 (3) | N4—N5 | 1.307 (3) |
N2—O5 | 1.219 (3) | N4—H4 | 0.85 (3) |
N2—O4 | 1.222 (3) | N5—N6 | 1.311 (3) |
N3—O7 | 1.222 (3) | N6—H6 | 0.94 (3) |
O1—C1—C2 | 125.6 (3) | N4—C7—C8 | 133.2 (3) |
O1—C1—C6 | 123.7 (3) | C12—C7—C8 | 121.8 (3) |
C2—C1—C6 | 110.7 (2) | C9—C8—C7 | 115.7 (3) |
C3—C2—C1 | 124.8 (3) | C9—C8—H8 | 122.1 |
C3—C2—N1 | 115.5 (3) | C7—C8—H8 | 122.1 |
C1—C2—N1 | 119.7 (2) | C8—C9—C10 | 122.1 (3) |
C2—C3—C4 | 119.3 (3) | C8—C9—H9 | 119.0 |
C2—C3—H3 | 120.3 | C10—C9—H9 | 119.0 |
C4—C3—H3 | 120.3 | C11—C10—C9 | 122.5 (3) |
C3—C4—C5 | 121.5 (3) | C11—C10—H10 | 118.8 |
C3—C4—N2 | 119.6 (3) | C9—C10—H10 | 118.8 |
C5—C4—N2 | 118.9 (3) | C10—C11—C12 | 115.9 (3) |
C6—C5—C4 | 118.7 (3) | C10—C11—H11 | 122.0 |
C6—C5—H5 | 120.7 | C12—C11—H11 | 122.0 |
C4—C5—H5 | 120.7 | N6—C12—C7 | 104.5 (2) |
C5—C6—C1 | 125.1 (3) | N6—C12—C11 | 133.5 (3) |
C5—C6—N3 | 115.9 (2) | C7—C12—C11 | 122.0 (3) |
C1—C6—N3 | 119.0 (2) | N5—N4—C7 | 112.4 (2) |
O2—N1—O3 | 122.4 (3) | N5—N4—H4 | 121 (2) |
O2—N1—C2 | 119.2 (3) | C7—N4—H4 | 127 (2) |
O3—N1—C2 | 118.4 (2) | N4—N5—N6 | 105.7 (2) |
O5—N2—O4 | 123.6 (3) | N5—N6—C12 | 112.3 (2) |
O5—N2—C4 | 118.7 (3) | N5—N6—O1 | 102.81 (18) |
O4—N2—C4 | 117.7 (3) | C12—N6—O1 | 144.73 (19) |
O7—N3—O6 | 122.8 (3) | N5—N6—H6 | 112.9 (19) |
O7—N3—C6 | 118.1 (3) | C12—N6—H6 | 133.3 (19) |
O6—N3—C6 | 119.1 (2) | C1—O1—N6 | 134.01 (19) |
N4—C7—C12 | 105.0 (2) | ||
O1—C1—C2—C3 | 177.1 (3) | C5—C6—N3—O6 | −146.4 (3) |
C6—C1—C2—C3 | −0.1 (4) | C1—C6—N3—O6 | 33.7 (4) |
O1—C1—C2—N1 | −2.0 (4) | N4—C7—C8—C9 | 178.9 (3) |
C6—C1—C2—N1 | −179.3 (3) | C12—C7—C8—C9 | 1.5 (4) |
C1—C2—C3—C4 | 0.7 (5) | C7—C8—C9—C10 | −0.4 (5) |
N1—C2—C3—C4 | 179.9 (3) | C8—C9—C10—C11 | −0.5 (5) |
C2—C3—C4—C5 | −0.7 (5) | C9—C10—C11—C12 | 0.3 (5) |
C2—C3—C4—N2 | 178.1 (3) | N4—C7—C12—N6 | 0.7 (3) |
C3—C4—C5—C6 | 0.1 (4) | C8—C7—C12—N6 | 178.7 (3) |
N2—C4—C5—C6 | −178.7 (3) | N4—C7—C12—C11 | −179.8 (3) |
C4—C5—C6—C1 | 0.6 (4) | C8—C7—C12—C11 | −1.8 (4) |
C4—C5—C6—N3 | −179.3 (3) | C10—C11—C12—N6 | −179.8 (3) |
O1—C1—C6—C5 | −177.8 (3) | C10—C11—C12—C7 | 0.8 (4) |
C2—C1—C6—C5 | −0.5 (4) | C12—C7—N4—N5 | −1.0 (3) |
O1—C1—C6—N3 | 2.0 (4) | C8—C7—N4—N5 | −178.6 (3) |
C2—C1—C6—N3 | 179.3 (3) | C7—N4—N5—N6 | 0.9 (3) |
C3—C2—N1—O2 | 160.8 (3) | N4—N5—N6—C12 | −0.4 (3) |
C1—C2—N1—O2 | −20.0 (4) | N4—N5—N6—O1 | 176.53 (19) |
C3—C2—N1—O3 | −17.7 (4) | C7—C12—N6—N5 | −0.2 (3) |
C1—C2—N1—O3 | 161.4 (3) | C11—C12—N6—N5 | −179.6 (3) |
C3—C4—N2—O5 | −168.3 (3) | C7—C12—N6—O1 | −175.0 (3) |
C5—C4—N2—O5 | 10.5 (4) | C11—C12—N6—O1 | 5.6 (6) |
C3—C4—N2—O4 | 12.4 (4) | C2—C1—O1—N6 | −140.9 (3) |
C5—C4—N2—O4 | −168.8 (3) | C6—C1—O1—N6 | 36.0 (4) |
C5—C6—N3—O7 | 33.4 (4) | N5—N6—O1—C1 | 144.9 (3) |
C1—C6—N3—O7 | −146.5 (3) | C12—N6—O1—C1 | −40.0 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···O1i | 0.85 (3) | 2.04 (3) | 2.799 (3) | 148 (3) |
N4—H4···O2i | 0.85 (3) | 2.16 (3) | 2.791 (3) | 131 (3) |
N6—H6···O1 | 0.94 (3) | 1.87 (3) | 2.770 (3) | 160 (3) |
N6—H6···O6 | 0.94 (3) | 2.48 (3) | 3.090 (3) | 123 (2) |
C8—H8···O2i | 0.93 | 2.57 | 3.148 (4) | 121 |
C11—H11···O6 | 0.93 | 2.56 | 3.200 (4) | 127 |
Symmetry code: (i) −x+3/2, y+1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C6H6N3+·C6H2N3O7− |
Mr | 348.24 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 14.4113 (15), 3.7608 (4), 24.941 (3) |
β (°) | 90.598 (2) |
V (Å3) | 1351.7 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.14 |
Crystal size (mm) | 0.35 × 0.08 × 0.06 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1997) |
Tmin, Tmax | 0.941, 0.991 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10116, 2793, 1772 |
Rint | 0.068 |
(sin θ/λ)max (Å−1) | 0.628 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.062, 0.160, 1.04 |
No. of reflections | 2793 |
No. of parameters | 232 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.26, −0.22 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···O1i | 0.85 (3) | 2.04 (3) | 2.799 (3) | 148 (3) |
N4—H4···O2i | 0.85 (3) | 2.16 (3) | 2.791 (3) | 131 (3) |
N6—H6···O1 | 0.94 (3) | 1.87 (3) | 2.770 (3) | 160 (3) |
N6—H6···O6 | 0.94 (3) | 2.48 (3) | 3.090 (3) | 123 (2) |
C8—H8···O2i | 0.93 | 2.57 | 3.148 (4) | 121 |
C11—H11···O6 | 0.93 | 2.56 | 3.200 (4) | 127 |
Symmetry code: (i) −x+3/2, y+1/2, −z+3/2. |
Acknowledgements
We thank the Yuntianhua group for financially supporting this study.
References
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Imidazolium-based picrate salts are good candidates for energetic materials (Sikder and Sikder, 2004). Herein we present the crystal structure of the title compound (I) .
The asymmetric unit of the title compound is shown in Fig. 1. During the preparation a phenolic proton was transfered to a triazole nitrogen atom, forming the 1:1 organic salt. In the picrate anion, the bond distances of C1—O1 = 1.251 (3) Å, C1—C2= 1.446 (4)Å and C1—C6 = 1.454 (4)Å may be affected by the withdrawing electron effects of the three nitro groups and are comparable to those in some related structures (Moreno-Fuquen et al., 2011; Pi et al., 2009; Jin et al., 2008; Li, 2007).
In the crystal, the components are linked by a combination of four N—H···O and two C—H···O hydrogen bonds into a one-dimensional structure along [010] which is further stabilized by one π–π interaction between symmetry-related triazole and benzene rings [Cg1—Cg2iii = 3.908 (1) Å, symmetry code (iii): x, 1 + y, z where Cg1 is the centroid of the triazole ring and Cg2 is the centroid defined by atoms C7—C12, respectively] (Fig.2). The crystal structure also contains a short N···N contact ca. 2.89Å. This type of contact is also seen in benzotriazole-3-nitrobenzoic acid (Hashizume et al., 2001).