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The title compound, C6H9N2+·H2PO4, consists of 2-amino-5-methyl­pyridinium cations and H2PO4 anions, which are held together by N—H...O hydrogen bonds.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805014716/is6071sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536805014716/is6071Isup2.hkl
Contains datablock I

CCDC reference: 277699

Key indicators

  • Single-crystal X-ray study
  • T = 293 K
  • Mean [sigma](C-C) = 0.003 Å
  • R factor = 0.035
  • wR factor = 0.093
  • Data-to-parameter ratio = 13.1

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical . ? PLAT199_ALERT_1_C Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature . 293 K PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for P PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor .... 2.12 PLAT380_ALERT_4_C Check Incorrectly? Oriented X(sp2)-Methyl Moiety C6 PLAT391_ALERT_3_C Deviating Methyl C6 H-C-H Bond Angle ...... 101.00 Deg.
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 7 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 1 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion

Computing details top

Data collection: PROCESS-AUTO (Rigaku, 2001); cell refinement: PROCESS-AUTO; data reduction: CrystalStructure (Rigaku, 2003); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: CrystalStructure; molecular graphics: SHELXTL (Siemens, 1998); software used to prepare material for publication: CrystalStructure.

2-Amino-5-methylpyridinium phosphate top
Crystal data top
C6H9N2+·H2PO4F(000) = 432.00
Mr = 206.14Dx = 1.485 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ynCell parameters from 9071 reflections
a = 7.9850 (5) Åθ = 2.7–27.5°
b = 10.9104 (6) ŵ = 0.28 mm1
c = 11.1556 (7) ÅT = 293 K
β = 108.414 (2)°Block, colorless
V = 922.11 (10) Å30.45 × 0.45 × 0.31 mm
Z = 4
Data collection top
Rigaku R-AXIS RAPID
diffractometer
2111 independent reflections
Radiation source: fine-focus sealed tube1664 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.027
Detector resolution: 10.00 pixels mm-1θmax = 27.5°, θmin = 2.7°
ω scansh = 1010
Absorption correction: multi-scan
(ABSCOR; Higashi, 1995)
k = 1214
Tmin = 0.880, Tmax = 0.916l = 1414
3577 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.035Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.093All H-atom parameters refined
S = 0.97 w = 1/[σ2(Fo2) + (0.063P)2]
where P = (Fo2 + 2Fc2)/3
2115 reflections(Δ/σ)max = 0.001
162 parametersΔρmax = 0.23 e Å3
2 restraintsΔρmin = 0.36 e Å3
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O40.20907 (16)1.05590 (12)0.58975 (13)0.0522 (3)
O20.11125 (14)0.85590 (10)0.47512 (11)0.0424 (3)
C60.0776 (3)0.3191 (2)0.3210 (2)0.0549 (5)
C50.1403 (2)0.53086 (15)0.40857 (14)0.0382 (4)
C40.1726 (2)0.40947 (15)0.42088 (15)0.0396 (4)
P0.25688 (5)0.94985 (4)0.51320 (3)0.03094 (14)
N20.22879 (17)0.61243 (13)0.49967 (11)0.0363 (3)
C30.3006 (3)0.37036 (17)0.53462 (18)0.0510 (5)
N10.4398 (2)0.66293 (16)0.68740 (14)0.0532 (4)
C20.3886 (3)0.45191 (17)0.62443 (17)0.0512 (5)
C10.3555 (2)0.57790 (15)0.60630 (14)0.0387 (4)
O10.43221 (14)0.90043 (11)0.59335 (11)0.0415 (3)
O30.26796 (16)1.00573 (13)0.38754 (11)0.0520 (4)
H6C0.028 (3)0.246 (2)0.359 (2)0.091 (8)*
H6B0.003 (4)0.355 (3)0.251 (3)0.106 (9)*
H2N0.186 (3)0.693 (2)0.4856 (17)0.059 (6)*
H50.051 (2)0.5727 (16)0.3362 (16)0.040 (5)*
H30.328 (2)0.2816 (19)0.5494 (17)0.056 (5)*
H1A0.517 (3)0.640 (2)0.757 (2)0.065 (6)*
H20.480 (3)0.429 (2)0.699 (2)0.076 (7)*
H2A0.423 (3)0.737 (2)0.666 (2)0.060 (6)*
H6A0.146 (3)0.282 (2)0.288 (2)0.090 (9)*
H3O0.375 (2)1.0403 (19)0.400 (2)0.075 (7)*
H4O0.098 (2)1.081 (2)0.5555 (19)0.065 (6)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O40.0360 (7)0.0520 (8)0.0615 (8)0.0007 (6)0.0053 (6)0.0276 (6)
O20.0324 (6)0.0302 (6)0.0588 (7)0.0042 (4)0.0063 (5)0.0040 (5)
C60.0650 (14)0.0414 (12)0.0495 (11)0.0044 (10)0.0057 (10)0.0051 (9)
C50.0403 (9)0.0354 (9)0.0332 (7)0.0004 (7)0.0035 (6)0.0033 (6)
C40.0424 (9)0.0340 (9)0.0381 (8)0.0009 (7)0.0065 (7)0.0024 (7)
P0.0265 (2)0.0297 (2)0.0331 (2)0.00148 (14)0.00438 (15)0.00021 (15)
N20.0411 (8)0.0295 (8)0.0338 (7)0.0023 (5)0.0053 (6)0.0040 (5)
C30.0570 (11)0.0320 (10)0.0526 (10)0.0037 (8)0.0011 (9)0.0103 (8)
N10.0686 (11)0.0400 (10)0.0355 (8)0.0097 (8)0.0058 (7)0.0082 (7)
C20.0568 (12)0.0391 (10)0.0430 (9)0.0019 (8)0.0050 (8)0.0128 (8)
C10.0451 (9)0.0353 (9)0.0309 (7)0.0033 (7)0.0052 (7)0.0067 (6)
O10.0296 (6)0.0420 (7)0.0468 (6)0.0006 (5)0.0035 (5)0.0131 (5)
O30.0323 (6)0.0781 (10)0.0392 (6)0.0035 (6)0.0024 (5)0.0166 (6)
Geometric parameters (Å, º) top
P—O11.5031 (11)C1—C21.402 (2)
P—O21.5071 (11)C2—C31.358 (3)
P—O31.5566 (12)C3—C41.420 (2)
P—O41.5555 (13)C6—C41.502 (2)
O3—H3O0.905 (16)C4—C51.348 (2)
O4—H4O0.889 (15)C6—H6C1.03 (3)
N1—C11.322 (2)C6—H6B0.93 (3)
N1—H1A0.86 (2)C6—H6A0.85 (3)
N1—H2A0.84 (2)C5—H51.004 (16)
N2—C11.3492 (18)C3—H30.99 (2)
N2—H2N0.94 (2)C2—H20.95 (2)
N2—C51.3677 (19)
P—O4—H4O112.2 (13)O4—P—O3107.26 (8)
C4—C6—H6C111.7 (12)C1—N2—C5122.75 (15)
C4—C6—H6B114 (2)C1—N2—H2N122.8 (12)
H6C—C6—H6B115 (2)C5—N2—H2N114.2 (12)
C4—C6—H6A113.0 (16)C2—C3—C4121.39 (17)
H6C—C6—H6A101 (2)C2—C3—H3118.7 (11)
H6B—C6—H6A102 (3)C4—C3—H3119.9 (10)
C4—C5—N2121.75 (15)C1—N1—H1A118.5 (15)
C4—C5—H5126.4 (10)C1—N1—H2A118.6 (15)
N2—C5—H5111.8 (10)H1A—N1—H2A123 (2)
C5—C4—C3116.54 (15)C3—C2—C1120.38 (16)
C5—C4—C6122.26 (16)C3—C2—H2123.3 (13)
C3—C4—C6121.20 (17)C1—C2—H2116.2 (13)
O1—P—O2114.48 (7)N1—C1—N2119.04 (16)
O1—P—O4106.52 (7)N1—C1—C2123.86 (16)
O2—P—O4111.06 (7)N2—C1—C2117.10 (15)
O1—P—O3111.65 (7)P—O3—H3O110.2 (13)
O2—P—O3105.72 (7)
N2—C5—C4—C31.4 (3)C4—C3—C2—C10.4 (3)
N2—C5—C4—C6179.39 (18)C5—N2—C1—N1177.30 (17)
C4—C5—N2—C11.1 (2)C5—N2—C1—C23.2 (2)
C5—C4—C3—C21.7 (3)C3—C2—C1—N1177.7 (2)
C6—C4—C3—C2179.0 (2)C3—C2—C1—N22.7 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H2A···O10.84 (2)1.97 (2)2.789 (3)164 (2)
N1—H1A···O2i0.86 (2)2.31 (2)3.073 (2)148 (2)
N2—H2N···O20.94 (2)1.87 (2)2.802 (2)174.2 (16)
O3—H3O···O1ii0.90 (2)1.65 (2)2.550 (3)174 (2)
O4—H4O···O2iii0.89 (2)1.74 (2)2.612 (3)166 (2)
C5—H5···O1iv1.003 (17)2.589 (17)3.464 (3)145.8 (13)
Symmetry codes: (i) x+1/2, y+3/2, z+1/2; (ii) x+1, y+2, z+1; (iii) x, y+2, z+1; (iv) x1/2, y+3/2, z1/2.
 

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