organic compounds
Bis(2,4,6-triamino-1,3,5-triazin-1-ium) hydrogen phosphate trihydrate
aCollege of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, People's Republic of China, and bInstitute of Molecular Science, Key Laboratory of Chemical Biology and Molecular, Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China
*Correspondence e-mail: ssfeng@sxu.edu.cn miaoli@sxu.edu.cn
In the title hydrated molecular salt, 2C3H7N6+·HPO42−·3H2O, three of the O atoms of the hydrogen phosphate anion are disordered over two positions, with relative occupancies of 0.763 (1) and 0.237 (1). In the crystal, the components are linked by N—H⋯N, N—H⋯O and O—H⋯O hydrogen bonds
Related literature
For related structures, see: Choi et al. (2004); Janczak & Perpétuo (2001a,b,c, 2002, 2003, 2004); Li et al. (2005); Perpétuo & Janczak (2002); Zhang et al. (2004).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2000); cell SAINT (Bruker, 2000); 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); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
10.1107/S1600536809054798/hb5248sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809054798/hb5248Isup2.hkl
Hot solutions of melamine and meta-phosphoric acid in a 1:1 molar ratio were mixed and, after allowed the mixture to stand at room temperature for a few days, colourless blocks of (I) were desposited.
H atoms attached to N (except N3 and N8) and O1 atoms of (I) were placed in geometrically idealized positions with N—H = 0.86 Å O1—H = 0.82 Å and refined with Uiso=1.2Ueq [N] or Uiso=1.5Ueq [O1]. H atoms attached to O (water) N3 and N8 atom were located from the difference Fourier maps and refined their global Uiso=1.2Ueq. The N3—H, N8—H, and O—H distances are in the range 0.768 - 0.851 Å. The O2, O3, and, O4 atoms from hydrogen phosphate anion of crystallization in (I) were found to be disordered and were modelled over two sets of positions using restraints on the anisotropic displacement parameters of these O atoms. The major and minor disorder components had refined occupancies of O2A 0.77 (1), O3A 0.76 (1), O4A 0.76 (1) % and O2B 0.23 (1) O3B 0.24 (1)O4B 0.24 (1)%, respectively.
Data collection: SMART (Bruker, 2000); cell
SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The structure of (I), with displacement ellipsoids drawn at the 30% probability level for non-H atoms. | |
Fig. 2. The packing of (I) viewed down the a axis. |
2C3H7N6+·HPO42−·3H2O | Z = 2 |
Mr = 404.32 | F(000) = 424 |
Triclinic, P1 | Dx = 1.657 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.767 (4) Å | Cell parameters from 1970 reflections |
b = 10.548 (7) Å | θ = 2.5–28.0° |
c = 12.497 (8) Å | µ = 0.24 mm−1 |
α = 91.865 (11)° | T = 296 K |
β = 105.609 (10)° | Block, colourless |
γ = 108.020 (9)° | 0.30 × 0.25 × 0.20 mm |
V = 810.3 (9) Å3 |
Bruker SMART 1K CCD diffractometer | 2803 independent reflections |
Radiation source: fine-focus sealed tube | 2027 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
ω scans | θmax = 25.1°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −7→8 |
Tmin = 0.933, Tmax = 0.954 | k = −11→12 |
3823 measured reflections | l = −14→7 |
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)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.178 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0996P)2 + 0.520P] where P = (Fo2 + 2Fc2)/3 |
2803 reflections | (Δ/σ)max = 0.003 |
274 parameters | Δρmax = 0.33 e Å−3 |
0 restraints | Δρmin = −0.53 e Å−3 |
2C3H7N6+·HPO42−·3H2O | γ = 108.020 (9)° |
Mr = 404.32 | V = 810.3 (9) Å3 |
Triclinic, P1 | Z = 2 |
a = 6.767 (4) Å | Mo Kα radiation |
b = 10.548 (7) Å | µ = 0.24 mm−1 |
c = 12.497 (8) Å | T = 296 K |
α = 91.865 (11)° | 0.30 × 0.25 × 0.20 mm |
β = 105.609 (10)° |
Bruker SMART 1K CCD diffractometer | 2803 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | 2027 reflections with I > 2σ(I) |
Tmin = 0.933, Tmax = 0.954 | Rint = 0.029 |
3823 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 0 restraints |
wR(F2) = 0.178 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.33 e Å−3 |
2803 reflections | Δρmin = −0.53 e Å−3 |
274 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 | Occ. (<1) | |
C1 | 0.5323 (6) | 0.7920 (4) | −0.0156 (3) | 0.0352 (8) | |
C2 | 0.6740 (6) | 0.8584 (4) | 0.1714 (3) | 0.0359 (8) | |
C3 | 0.4373 (6) | 0.6393 (4) | 0.1008 (3) | 0.0337 (8) | |
C4 | 0.0847 (5) | 0.8128 (3) | 0.0751 (3) | 0.0317 (8) | |
C5 | 0.2296 (6) | 0.8597 (4) | 0.2627 (3) | 0.0372 (8) | |
C6 | −0.0212 (5) | 0.6489 (4) | 0.1803 (3) | 0.0329 (8) | |
N1 | 0.4191 (5) | 0.6664 (3) | −0.0031 (2) | 0.0352 (7) | |
N2 | 0.6575 (5) | 0.8903 (3) | 0.0688 (2) | 0.0355 (7) | |
N3 | 0.5651 (5) | 0.7323 (3) | 0.1889 (3) | 0.0363 (7) | |
H3 | 0.577 (6) | 0.712 (4) | 0.248 (3) | 0.029 (10)* | |
N4 | 0.5233 (5) | 0.8212 (3) | −0.1176 (3) | 0.0436 (8) | |
H4A | 0.5955 | 0.9002 | −0.1280 | 0.052* | |
H4B | 0.4453 | 0.7613 | −0.1741 | 0.052* | |
N5 | 0.7957 (5) | 0.9458 (3) | 0.2586 (3) | 0.0459 (8) | |
H5A | 0.8672 | 1.0258 | 0.2499 | 0.055* | |
H5B | 0.8047 | 0.9235 | 0.3249 | 0.055* | |
N6 | 0.3325 (5) | 0.5192 (3) | 0.1207 (3) | 0.0418 (8) | |
H6A | 0.2515 | 0.4577 | 0.0659 | 0.050* | |
H6B | 0.3450 | 0.5021 | 0.1886 | 0.050* | |
N7 | 0.2203 (5) | 0.9023 (3) | 0.1634 (2) | 0.0358 (7) | |
N8 | 0.1115 (5) | 0.7333 (3) | 0.2726 (3) | 0.0374 (7) | |
H8 | 0.126 (5) | 0.703 (3) | 0.334 (3) | 0.021 (8)* | |
N9 | −0.0400 (4) | 0.6864 (3) | 0.0791 (2) | 0.0330 (7) | |
N10 | 0.3541 (5) | 0.9350 (4) | 0.3562 (3) | 0.0552 (10) | |
H10A | 0.4343 | 1.0157 | 0.3550 | 0.066* | |
H10B | 0.3558 | 0.9039 | 0.4191 | 0.066* | |
N11 | −0.1322 (5) | 0.5270 (3) | 0.1931 (3) | 0.0420 (8) | |
H11A | −0.2178 | 0.4709 | 0.1354 | 0.050* | |
H11B | −0.1193 | 0.5031 | 0.2591 | 0.050* | |
N12 | 0.0741 (5) | 0.8512 (3) | −0.0246 (2) | 0.0379 (7) | |
H12A | 0.1520 | 0.9305 | −0.0310 | 0.045* | |
H12B | −0.0107 | 0.7969 | −0.0834 | 0.045* | |
P1 | 0.24796 (15) | 0.68587 (9) | 0.57240 (7) | 0.0335 (3) | |
O1 | 0.0294 (5) | 0.6330 (3) | 0.6053 (3) | 0.0599 (9) | |
H1 | −0.0482 | 0.5614 | 0.5669 | 0.090* | |
O2A | 0.2963 (6) | 0.8336 (3) | 0.5671 (3) | 0.0445 (14) | 0.767 (9) |
O3A | 0.2088 (7) | 0.6098 (4) | 0.4601 (4) | 0.0353 (15) | 0.757 (14) |
O4A | 0.4058 (6) | 0.6486 (5) | 0.6643 (3) | 0.0507 (16) | 0.765 (11) |
O2B | 0.176 (2) | 0.7686 (13) | 0.4856 (10) | 0.046 (5) | 0.233 (9) |
O3B | 0.279 (2) | 0.5614 (14) | 0.5130 (13) | 0.040 (5) | 0.243 (14) |
O4B | 0.4481 (19) | 0.7567 (17) | 0.6642 (10) | 0.048 (5) | 0.235 (11) |
O5 | 0.4731 (5) | 0.4107 (3) | 0.6295 (3) | 0.0606 (9) | |
H5C | 0.4405 | 0.4792 | 0.6078 | 0.091* | |
H5D | 0.5757 | 0.4063 | 0.6041 | 0.091* | |
O6 | 0.8660 (5) | 0.7583 (4) | 0.7442 (3) | 0.0753 (11) | |
H6C | 0.7299 | 0.7431 | 0.7189 | 0.113* | |
H6D | 0.8984 | 0.7038 | 0.7061 | 0.113* | |
O7 | 0.8612 (6) | 0.8583 (4) | 0.4724 (3) | 0.0799 (11) | |
H7A | 0.7320 | 0.8059 | 0.4420 | 0.120* | |
H7B | 0.9418 | 0.8093 | 0.4809 | 0.120* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0292 (18) | 0.040 (2) | 0.040 (2) | 0.0123 (16) | 0.0150 (15) | 0.0077 (16) |
C2 | 0.0342 (19) | 0.039 (2) | 0.042 (2) | 0.0175 (16) | 0.0177 (16) | 0.0081 (17) |
C3 | 0.0292 (18) | 0.038 (2) | 0.040 (2) | 0.0133 (15) | 0.0165 (15) | 0.0067 (16) |
C4 | 0.0274 (18) | 0.039 (2) | 0.0343 (19) | 0.0133 (15) | 0.0146 (15) | 0.0090 (15) |
C5 | 0.0281 (18) | 0.047 (2) | 0.035 (2) | 0.0074 (16) | 0.0143 (15) | 0.0034 (16) |
C6 | 0.0272 (18) | 0.044 (2) | 0.0321 (19) | 0.0140 (16) | 0.0127 (14) | 0.0088 (15) |
N1 | 0.0342 (17) | 0.0360 (17) | 0.0369 (17) | 0.0086 (13) | 0.0161 (13) | 0.0076 (13) |
N2 | 0.0348 (16) | 0.0349 (17) | 0.0402 (17) | 0.0088 (13) | 0.0193 (13) | 0.0082 (13) |
N3 | 0.0397 (18) | 0.0396 (18) | 0.0358 (19) | 0.0147 (14) | 0.0188 (15) | 0.0119 (15) |
N4 | 0.0468 (19) | 0.0413 (18) | 0.0375 (18) | 0.0038 (15) | 0.0161 (14) | 0.0071 (14) |
N5 | 0.054 (2) | 0.0432 (19) | 0.0371 (18) | 0.0088 (15) | 0.0154 (15) | 0.0043 (15) |
N6 | 0.0464 (19) | 0.0408 (19) | 0.0396 (18) | 0.0101 (15) | 0.0188 (15) | 0.0120 (14) |
N7 | 0.0302 (16) | 0.0381 (17) | 0.0375 (17) | 0.0053 (13) | 0.0146 (13) | 0.0040 (13) |
N8 | 0.0384 (18) | 0.047 (2) | 0.0266 (17) | 0.0108 (15) | 0.0130 (14) | 0.0108 (14) |
N9 | 0.0303 (15) | 0.0344 (17) | 0.0331 (16) | 0.0065 (13) | 0.0119 (12) | 0.0084 (12) |
N10 | 0.048 (2) | 0.062 (2) | 0.0367 (19) | −0.0071 (17) | 0.0125 (16) | −0.0012 (16) |
N11 | 0.0438 (18) | 0.0413 (18) | 0.0323 (17) | 0.0017 (14) | 0.0111 (14) | 0.0125 (13) |
N12 | 0.0408 (18) | 0.0368 (17) | 0.0337 (17) | 0.0056 (14) | 0.0150 (13) | 0.0101 (13) |
P1 | 0.0332 (5) | 0.0360 (5) | 0.0311 (5) | 0.0064 (4) | 0.0142 (4) | 0.0090 (4) |
O1 | 0.0576 (19) | 0.0512 (19) | 0.068 (2) | −0.0043 (14) | 0.0431 (16) | −0.0138 (15) |
O2A | 0.047 (2) | 0.039 (2) | 0.047 (3) | 0.0066 (17) | 0.022 (2) | 0.0108 (18) |
O3A | 0.036 (2) | 0.037 (2) | 0.033 (2) | 0.0065 (16) | 0.0155 (18) | 0.0097 (17) |
O4A | 0.058 (3) | 0.059 (4) | 0.038 (2) | 0.028 (2) | 0.0091 (17) | 0.0085 (18) |
O2B | 0.060 (9) | 0.058 (9) | 0.030 (8) | 0.032 (7) | 0.015 (7) | 0.015 (6) |
O3B | 0.042 (7) | 0.045 (8) | 0.039 (9) | 0.019 (6) | 0.015 (6) | −0.006 (6) |
O4B | 0.039 (7) | 0.054 (12) | 0.047 (7) | 0.012 (6) | 0.008 (5) | 0.011 (6) |
O5 | 0.073 (2) | 0.075 (2) | 0.065 (2) | 0.0440 (18) | 0.0458 (17) | 0.0388 (16) |
O6 | 0.065 (2) | 0.121 (3) | 0.0487 (19) | 0.050 (2) | 0.0113 (16) | −0.0150 (18) |
O7 | 0.085 (3) | 0.086 (3) | 0.077 (2) | 0.036 (2) | 0.025 (2) | 0.037 (2) |
C1—N4 | 1.311 (5) | N6—H6A | 0.8600 |
C1—N2 | 1.346 (5) | N6—H6B | 0.8600 |
C1—N1 | 1.347 (5) | N8—H8 | 0.84 (3) |
C2—N5 | 1.303 (5) | N10—H10A | 0.8600 |
C2—N2 | 1.320 (5) | N10—H10B | 0.8600 |
C2—N3 | 1.363 (5) | N11—H11A | 0.8600 |
C3—N6 | 1.315 (5) | N11—H11B | 0.8600 |
C3—N1 | 1.320 (4) | N12—H12A | 0.8600 |
C3—N3 | 1.347 (5) | N12—H12B | 0.8600 |
C4—N12 | 1.313 (4) | P1—O4B | 1.480 (12) |
C4—N7 | 1.343 (5) | P1—O2B | 1.488 (10) |
C4—N9 | 1.350 (4) | P1—O2A | 1.498 (4) |
C5—N10 | 1.305 (5) | P1—O4A | 1.498 (4) |
C5—N7 | 1.326 (5) | P1—O3A | 1.510 (4) |
C5—N8 | 1.355 (5) | P1—O1 | 1.581 (3) |
C6—N11 | 1.313 (5) | P1—O3B | 1.584 (11) |
C6—N9 | 1.323 (4) | O1—H1 | 0.8200 |
C6—N8 | 1.346 (5) | O5—H5C | 0.8501 |
N3—H3 | 0.77 (4) | O5—H5D | 0.8500 |
N4—H4A | 0.8600 | O6—H6C | 0.8500 |
N4—H4B | 0.8600 | O6—H6D | 0.8501 |
N5—H5A | 0.8600 | O7—H7A | 0.8508 |
N5—H5B | 0.8600 | O7—H7B | 0.8500 |
N4—C1—N2 | 116.9 (3) | H6A—N6—H6B | 120.0 |
N4—C1—N1 | 118.0 (3) | C5—N7—C4 | 115.4 (3) |
N2—C1—N1 | 125.1 (3) | C6—N8—C5 | 119.8 (3) |
N5—C2—N2 | 121.1 (3) | C6—N8—H8 | 118 (2) |
N5—C2—N3 | 118.1 (3) | C5—N8—H8 | 122 (2) |
N2—C2—N3 | 120.7 (3) | C6—N9—C4 | 115.6 (3) |
N6—C3—N1 | 120.4 (3) | C5—N10—H10A | 120.0 |
N6—C3—N3 | 118.3 (3) | C5—N10—H10B | 120.0 |
N1—C3—N3 | 121.3 (3) | H10A—N10—H10B | 120.0 |
N12—C4—N7 | 117.0 (3) | C6—N11—H11A | 120.0 |
N12—C4—N9 | 116.9 (3) | C6—N11—H11B | 120.0 |
N7—C4—N9 | 126.1 (3) | H11A—N11—H11B | 120.0 |
N10—C5—N7 | 122.6 (4) | C4—N12—H12A | 120.0 |
N10—C5—N8 | 115.9 (3) | C4—N12—H12B | 120.0 |
N7—C5—N8 | 121.5 (3) | H12A—N12—H12B | 120.0 |
N11—C6—N9 | 120.4 (3) | O4B—P1—O2B | 116.0 (8) |
N11—C6—N8 | 118.1 (3) | O2A—P1—O4A | 115.2 (3) |
N9—C6—N8 | 121.5 (3) | O2A—P1—O3A | 112.0 (2) |
C3—N1—C1 | 116.4 (3) | O4A—P1—O3A | 112.0 (3) |
C2—N2—C1 | 116.6 (3) | O4B—P1—O1 | 116.8 (5) |
C3—N3—C2 | 119.9 (3) | O2B—P1—O1 | 97.5 (5) |
C3—N3—H3 | 118 (3) | O2A—P1—O1 | 107.06 (18) |
C2—N3—H3 | 122 (3) | O4A—P1—O1 | 102.7 (2) |
C1—N4—H4A | 120.0 | O3A—P1—O1 | 106.93 (17) |
C1—N4—H4B | 120.0 | O4B—P1—O3B | 109.3 (8) |
H4A—N4—H4B | 120.0 | O2B—P1—O3B | 108.8 (9) |
C2—N5—H5A | 120.0 | O1—P1—O3B | 107.7 (4) |
C2—N5—H5B | 120.0 | P1—O1—H1 | 109.5 |
H5A—N5—H5B | 120.0 | H5C—O5—H5D | 107.7 |
C3—N6—H6A | 120.0 | H6C—O6—H6D | 107.7 |
C3—N6—H6B | 120.0 | H7A—O7—H7B | 106.2 |
N6—C3—N1—C1 | −179.9 (3) | N10—C5—N7—C4 | 179.9 (4) |
N3—C3—N1—C1 | −0.9 (5) | N8—C5—N7—C4 | 1.0 (5) |
N4—C1—N1—C3 | 177.9 (3) | N12—C4—N7—C5 | −179.0 (3) |
N2—C1—N1—C3 | −1.1 (5) | N9—C4—N7—C5 | 0.1 (5) |
N5—C2—N2—C1 | 178.3 (3) | N11—C6—N8—C5 | 179.6 (3) |
N3—C2—N2—C1 | −1.1 (5) | N9—C6—N8—C5 | −0.2 (5) |
N4—C1—N2—C2 | −176.9 (3) | N10—C5—N8—C6 | −180.0 (3) |
N1—C1—N2—C2 | 2.1 (5) | N7—C5—N8—C6 | −1.0 (5) |
N6—C3—N3—C2 | −179.2 (3) | N11—C6—N9—C4 | −178.6 (3) |
N1—C3—N3—C2 | 1.8 (5) | N8—C6—N9—C4 | 1.2 (5) |
N5—C2—N3—C3 | 179.9 (3) | N12—C4—N9—C6 | 178.0 (3) |
N2—C2—N3—C3 | −0.8 (5) | N7—C4—N9—C6 | −1.2 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···O5i | 0.77 (4) | 2.06 (4) | 2.791 (4) | 158 (4) |
N4—H4B···O4Aii | 0.86 | 2.22 | 2.998 (5) | 151 |
N4—H4A···N7iii | 0.86 | 2.20 | 3.059 (5) | 177 |
N5—H5B···O7 | 0.86 | 1.97 | 2.822 (5) | 170 |
N5—H5A···O6iv | 0.86 | 2.41 | 3.258 (5) | 167 |
N6—H6B···O5i | 0.86 | 2.28 | 3.009 (5) | 143 |
N6—H6A···N9v | 0.86 | 2.17 | 3.031 (5) | 176 |
N8—H8···O3A | 0.84 (3) | 1.93 (4) | 2.742 (7) | 164 (3) |
N10—H10B···O2A | 0.86 | 2.11 | 2.952 (5) | 168 |
N10—H10A···O2Avi | 0.86 | 1.99 | 2.744 (5) | 146 |
N11—H11B···O4Avii | 0.86 | 2.53 | 3.147 (6) | 129 |
N11—H11B···O1vii | 0.86 | 2.33 | 3.121 (5) | 152 |
N11—H11A···N1v | 0.86 | 2.02 | 2.884 (4) | 178 |
N12—H12B···O6viii | 0.86 | 2.07 | 2.840 (5) | 149 |
N12—H12A···N2iii | 0.86 | 2.08 | 2.935 (4) | 172 |
O1—H1···O3Avii | 0.82 | 1.76 | 2.535 (5) | 157 |
O5—H5D···O3Ai | 0.85 | 1.89 | 2.739 (5) | 177 |
O5—H5C···O4A | 0.85 | 2.00 | 2.726 (6) | 142 |
O6—H6D···O1ix | 0.85 | 1.97 | 2.787 (4) | 161 |
O6—H6C···O4A | 0.85 | 2.02 | 2.838 (6) | 162 |
O7—H7B···O1ix | 0.85 | 2.57 | 3.257 (5) | 139 |
O7—H7B···O2Aix | 0.85 | 2.28 | 2.958 (6) | 137 |
O7—H7A···O5i | 0.85 | 2.28 | 3.006 (6) | 144 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, y, z−1; (iii) −x+1, −y+2, −z; (iv) −x+2, −y+2, −z+1; (v) −x, −y+1, −z; (vi) −x+1, −y+2, −z+1; (vii) −x, −y+1, −z+1; (viii) x−1, y, z−1; (ix) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | 2C3H7N6+·HPO42−·3H2O |
Mr | 404.32 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 6.767 (4), 10.548 (7), 12.497 (8) |
α, β, γ (°) | 91.865 (11), 105.609 (10), 108.020 (9) |
V (Å3) | 810.3 (9) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART 1K CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2000) |
Tmin, Tmax | 0.933, 0.954 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3823, 2803, 2027 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.597 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.178, 1.06 |
No. of reflections | 2803 |
No. of parameters | 274 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.33, −0.53 |
Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···O5i | 0.77 (4) | 2.06 (4) | 2.791 (4) | 158 (4) |
N4—H4B···O4Aii | 0.86 | 2.22 | 2.998 (5) | 151 |
N4—H4A···N7iii | 0.86 | 2.20 | 3.059 (5) | 177 |
N5—H5B···O7 | 0.86 | 1.97 | 2.822 (5) | 170 |
N5—H5A···O6iv | 0.86 | 2.41 | 3.258 (5) | 167 |
N6—H6B···O5i | 0.86 | 2.28 | 3.009 (5) | 143 |
N6—H6A···N9v | 0.86 | 2.17 | 3.031 (5) | 176 |
N8—H8···O3A | 0.84 (3) | 1.93 (4) | 2.742 (7) | 164 (3) |
N10—H10B···O2A | 0.86 | 2.11 | 2.952 (5) | 168 |
N10—H10A···O2Avi | 0.86 | 1.99 | 2.744 (5) | 146 |
N11—H11B···O4Avii | 0.86 | 2.53 | 3.147 (6) | 129 |
N11—H11B···O1vii | 0.86 | 2.33 | 3.121 (5) | 152 |
N11—H11A···N1v | 0.86 | 2.02 | 2.884 (4) | 178 |
N12—H12B···O6viii | 0.86 | 2.07 | 2.840 (5) | 149 |
N12—H12A···N2iii | 0.86 | 2.08 | 2.935 (4) | 172 |
O1—H1···O3Avii | 0.82 | 1.76 | 2.535 (5) | 157 |
O5—H5D···O3Ai | 0.85 | 1.89 | 2.739 (5) | 177 |
O5—H5C···O4A | 0.85 | 2.00 | 2.726 (6) | 142 |
O6—H6D···O1ix | 0.85 | 1.97 | 2.787 (4) | 161 |
O6—H6C···O4A | 0.85 | 2.02 | 2.838 (6) | 162 |
O7—H7B···O1ix | 0.85 | 2.57 | 3.257 (5) | 139 |
O7—H7B···O2Aix | 0.85 | 2.28 | 2.958 (6) | 137 |
O7—H7A···O5i | 0.85 | 2.28 | 3.006 (6) | 144 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, y, z−1; (iii) −x+1, −y+2, −z; (iv) −x+2, −y+2, −z+1; (v) −x, −y+1, −z; (vi) −x+1, −y+2, −z+1; (vii) −x, −y+1, −z+1; (viii) x−1, y, z−1; (ix) x+1, y, z. |
Acknowledgements
This work was supported by the Science Foundation of Shanxi Datong University of China (No.2005k03) and the Doctoral Start-up Foundation of Shanxi University.
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
In previous work, we reported a compound of 2,4,6-triamino-1,3,5-triazin-1-ium with organic anion linked via weak interactions (Li et al., 2005). As continuing interest, here, we present the results of the crystal structure of another ion pair adduct containing monoprotonated melaminium, inorganic anion (hydrogen phosphate), and solvent water, (I, Fig. 1 & Table 1).
The aromatic rings both monoprotonated melaminium exhibit significant distortions from the ideal hexagonal form. Thus, the internal C—N—C angles at the protonated N atoms (C1—N3—C2 and C6 N8 C5) are significantly greater than the other two ring (i.e. C1—N2—C2, C1—N1—C3, C5—N7—C4, C6—N9—C4) angles, and the internal N2—C1—N1and N7—C4—N9 angle, i.e. containing only non-protonated N atoms is greater than either of the remaining N—C—N angles containing both protonated and non-protonated N atoms (Table 1). This feature of the structure is similar to our previous report (Li et al., 2005) and the other reported mono-protonated melaminium cations (Janczak & Perpétuo, 2001a,b,c, 2002, 2003, 2004; Perpétuo & Janczak, 2002; Zhang et al., 2004; Choi et al., 2004).
Between charged residues and the water molecules interact extensively by a combination of ionic, H-bonds (Table 2) as well as π-π interactions as shown in Fig 2. Neighboring melaminium residues are interconnected by double N—H···N H-bonds, leading to the formation of layers.