The title compound, C
6H
12N
4, has four crystallographically independent molecules in the asymmetric unit. Intermolecular N—H
N hydrogen bonds involving amino groups and triazole N atoms form a three-dimensional framework involving
R44(10) and
R44(20) rings. The hydrogen bonding is supported by weak C—H
π interactions.
Supporting information
CCDC reference: 655517
Propionic acid (18.5 g, 0.25 mol) was added to a solution of hydrazine hydrate
(21.5 g, 0.4 mol) and the mixture was refluxed for 5 h. On cooling, a
precipitate was formed, and this product was filtered off and dried.
Recrystalization from ethyl acetate gave a white [final crystals are
colourless according to CIF] product. Yield 62%. Single crystals of (I)
were obtained from ethyl acetate at room temperature by slow evaporation (m.p.
438–439 K). IR (KBr, cm-1): 3235–3120 (vNH2), 1664 (vC=N); 1H NMR
(CDCl3, p.p.m.): δ 1.30 (t, 6H, 2CH3), 2.76 (g, 4H,
2CH2), 5.02 (s, 2H, NH2); 13C NMR (CDCl3, p.p.m.): δ 156.21
(triazole C3 and triazole C5), 17.87 (CH2), 11.40 (CH3). Elemental
analysis, calculated for C6H12N4: C 51.41, H 8.63, N 39.97%; found: C
52.40, H 8.61, N 39.75%.
All H atoms bound to carbon were refined using a riding model with C—H = 0.97 Å [Uiso(H) = 1.2Ueq(parent atom)] for methylene H atoms
and C—H = 0.96 Å [Uiso(H) = 1.5Ueq(parent atom)] for
methyl H atoms. The amino H atoms were located in a difference map and refined
freely (distances given in Table 2).
Data collection: X-AREA (Stoe & Cie, 2002); cell refinement: X-AREA; data reduction: X-RED (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
4-Amino-3,5-diethyl-4
H-1,2,4-triazole
top
Crystal data top
C6H12N4 | F(000) = 2432 |
Mr = 140.20 | Dx = 1.154 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2 yc | Cell parameters from 16583 reflections |
a = 37.782 (2) Å | θ = 1.5–28.0° |
b = 9.2996 (4) Å | µ = 0.08 mm−1 |
c = 18.4055 (12) Å | T = 100 K |
β = 93.067 (5)° | Prism, colourless |
V = 6457.6 (7) Å3 | 0.50 × 0.48 × 0.41 mm |
Z = 32 | |
Data collection top
Stoe IPDS II diffractometer | 4902 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.027 |
Graphite monochromator | θmax = 26.0°, θmin = 2.2° |
Detector resolution: 6.67 pixels mm-1 | h = −46→46 |
ω scans | k = −11→11 |
16583 measured reflections | l = −22→18 |
6331 independent reflections | |
Refinement top
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.091 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0495P)2 + 0.9309P] where P = (Fo2 + 2Fc2)/3 |
6331 reflections | (Δ/σ)max = 0.001 |
393 parameters | Δρmax = 0.16 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
Crystal data top
C6H12N4 | V = 6457.6 (7) Å3 |
Mr = 140.20 | Z = 32 |
Monoclinic, C2/c | Mo Kα radiation |
a = 37.782 (2) Å | µ = 0.08 mm−1 |
b = 9.2996 (4) Å | T = 100 K |
c = 18.4055 (12) Å | 0.50 × 0.48 × 0.41 mm |
β = 93.067 (5)° | |
Data collection top
Stoe IPDS II diffractometer | 4902 reflections with I > 2σ(I) |
16583 measured reflections | Rint = 0.027 |
6331 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.091 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.16 e Å−3 |
6331 reflections | Δρmin = −0.23 e Å−3 |
393 parameters | |
Special details top
Experimental. X-RED32; Stoe & Cie, 2002. |
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 | x | y | z | Uiso*/Ueq | |
C1 | 0.31694 (4) | 0.96729 (15) | 0.39692 (8) | 0.0336 (3) | |
H1A | 0.3105 | 1.0509 | 0.4237 | 0.050* | |
H1B | 0.3135 | 0.9858 | 0.3457 | 0.050* | |
H1C | 0.3414 | 0.9449 | 0.4083 | 0.050* | |
C2 | 0.29403 (3) | 0.84128 (13) | 0.41746 (7) | 0.0256 (3) | |
H2A | 0.2973 | 0.8245 | 0.4694 | 0.031* | |
H2B | 0.2693 | 0.8653 | 0.4067 | 0.031* | |
C3 | 0.30261 (3) | 0.70765 (13) | 0.37815 (7) | 0.0231 (3) | |
C4 | 0.29939 (3) | 0.48548 (13) | 0.34005 (7) | 0.0241 (3) | |
C5 | 0.28663 (3) | 0.33614 (14) | 0.32738 (8) | 0.0301 (3) | |
H5A | 0.2803 | 0.2948 | 0.3733 | 0.036* | |
H5B | 0.3057 | 0.2789 | 0.3092 | 0.036* | |
C6 | 0.25475 (4) | 0.32883 (17) | 0.27340 (9) | 0.0412 (4) | |
H6A | 0.2475 | 0.2305 | 0.2670 | 0.062* | |
H6B | 0.2610 | 0.3677 | 0.2275 | 0.062* | |
H6C | 0.2356 | 0.3837 | 0.2916 | 0.062* | |
C7 | 0.36281 (4) | 0.93835 (14) | 0.59295 (8) | 0.0336 (3) | |
H7A | 0.3730 | 1.0280 | 0.6093 | 0.050* | |
H7B | 0.3455 | 0.9558 | 0.5539 | 0.050* | |
H7C | 0.3811 | 0.8770 | 0.5761 | 0.050* | |
C8 | 0.34518 (4) | 0.86572 (14) | 0.65563 (8) | 0.0310 (3) | |
H8A | 0.3627 | 0.8501 | 0.6954 | 0.037* | |
H8B | 0.3270 | 0.9285 | 0.6730 | 0.037* | |
C9 | 0.32905 (3) | 0.72596 (13) | 0.63330 (7) | 0.0234 (3) | |
C10 | 0.32105 (3) | 0.49621 (13) | 0.61520 (7) | 0.0225 (3) | |
C11 | 0.32627 (3) | 0.33771 (13) | 0.61911 (8) | 0.0281 (3) | |
H11A | 0.3216 | 0.3044 | 0.6676 | 0.034* | |
H11B | 0.3507 | 0.3151 | 0.6102 | 0.034* | |
C12 | 0.30196 (4) | 0.25975 (15) | 0.56387 (9) | 0.0397 (4) | |
H12A | 0.3060 | 0.1580 | 0.5677 | 0.060* | |
H12B | 0.3068 | 0.2914 | 0.5158 | 0.060* | |
H12C | 0.2777 | 0.2805 | 0.5732 | 0.060* | |
C13 | 0.42040 (4) | 0.61533 (15) | 0.54323 (9) | 0.0371 (3) | |
H13A | 0.4249 | 0.6991 | 0.5147 | 0.056* | |
H13B | 0.4198 | 0.6419 | 0.5936 | 0.056* | |
H13C | 0.3980 | 0.5742 | 0.5273 | 0.056* | |
C14 | 0.44956 (3) | 0.50620 (14) | 0.53408 (8) | 0.0271 (3) | |
H14A | 0.4503 | 0.4817 | 0.4830 | 0.033* | |
H14B | 0.4721 | 0.5493 | 0.5492 | 0.033* | |
C15 | 0.44475 (3) | 0.37224 (13) | 0.57667 (7) | 0.0226 (3) | |
C16 | 0.45081 (3) | 0.15023 (13) | 0.61341 (7) | 0.0234 (3) | |
C17 | 0.46318 (3) | −0.00189 (14) | 0.61739 (8) | 0.0283 (3) | |
H17A | 0.4887 | −0.0039 | 0.6131 | 0.034* | |
H17B | 0.4524 | −0.0547 | 0.5765 | 0.034* | |
C18 | 0.45432 (4) | −0.07662 (15) | 0.68739 (8) | 0.0335 (3) | |
H18A | 0.4628 | −0.1738 | 0.6869 | 0.050* | |
H18B | 0.4291 | −0.0769 | 0.6915 | 0.050* | |
H18C | 0.4654 | −0.0264 | 0.7281 | 0.050* | |
C19 | 0.53415 (4) | 0.41111 (16) | 0.66671 (9) | 0.0408 (4) | |
H19A | 0.5356 | 0.5096 | 0.6822 | 0.061* | |
H19B | 0.5201 | 0.3578 | 0.6993 | 0.061* | |
H19C | 0.5234 | 0.4064 | 0.6184 | 0.061* | |
C20 | 0.57101 (3) | 0.34738 (14) | 0.66725 (8) | 0.0292 (3) | |
H20A | 0.5852 | 0.4034 | 0.6352 | 0.035* | |
H20B | 0.5819 | 0.3542 | 0.7160 | 0.035* | |
C21 | 0.57113 (3) | 0.19427 (13) | 0.64361 (7) | 0.0236 (3) | |
C22 | 0.58647 (3) | −0.03132 (13) | 0.63621 (7) | 0.0238 (3) | |
C23 | 0.60557 (4) | −0.16930 (14) | 0.65157 (7) | 0.0292 (3) | |
H23A | 0.5935 | −0.2218 | 0.6884 | 0.035* | |
H23B | 0.6293 | −0.1480 | 0.6712 | 0.035* | |
C24 | 0.60801 (5) | −0.26362 (17) | 0.58526 (10) | 0.0490 (4) | |
H24A | 0.6205 | −0.3505 | 0.5985 | 0.074* | |
H24B | 0.6205 | −0.2134 | 0.5490 | 0.074* | |
H24C | 0.5846 | −0.2870 | 0.5661 | 0.074* | |
N1 | 0.28425 (2) | 0.58223 (11) | 0.38425 (6) | 0.0220 (2) | |
N2 | 0.32771 (3) | 0.68948 (12) | 0.33260 (6) | 0.0272 (2) | |
N3 | 0.32573 (3) | 0.54690 (12) | 0.30837 (6) | 0.0290 (2) | |
N4 | 0.25588 (3) | 0.55081 (12) | 0.42869 (6) | 0.0234 (2) | |
H4A | 0.2408 (4) | 0.6234 (17) | 0.4222 (9) | 0.034 (4)* | |
H4B | 0.2648 (4) | 0.5509 (17) | 0.4765 (10) | 0.036 (4)* | |
N5 | 0.34293 (2) | 0.59425 (11) | 0.64996 (6) | 0.0208 (2) | |
N6 | 0.30038 (3) | 0.71067 (11) | 0.59104 (6) | 0.0275 (2) | |
N7 | 0.29537 (3) | 0.56346 (11) | 0.57896 (6) | 0.0260 (2) | |
N8 | 0.37256 (3) | 0.56973 (12) | 0.69838 (6) | 0.0237 (2) | |
H8C | 0.3871 (4) | 0.5086 (17) | 0.6754 (9) | 0.032 (4)* | |
H8D | 0.3636 (4) | 0.5240 (18) | 0.7379 (10) | 0.045 (5)* | |
N9 | 0.46129 (3) | 0.24589 (11) | 0.56290 (6) | 0.0214 (2) | |
N10 | 0.42495 (3) | 0.35608 (11) | 0.63246 (6) | 0.0253 (2) | |
N11 | 0.42889 (3) | 0.21348 (11) | 0.65618 (6) | 0.0258 (2) | |
N12 | 0.48385 (3) | 0.22413 (12) | 0.50525 (6) | 0.0238 (2) | |
H12D | 0.5051 (4) | 0.1925 (17) | 0.5276 (9) | 0.034 (4)* | |
H12E | 0.4732 (4) | 0.1495 (17) | 0.4763 (9) | 0.034 (4)* | |
N13 | 0.59398 (3) | 0.09351 (11) | 0.67216 (6) | 0.0220 (2) | |
N14 | 0.55054 (3) | 0.13502 (11) | 0.59243 (6) | 0.0273 (2) | |
N15 | 0.56043 (3) | −0.00943 (12) | 0.58750 (6) | 0.0271 (2) | |
N16 | 0.61984 (3) | 0.10815 (11) | 0.72996 (6) | 0.0235 (2) | |
H16A | 0.6081 (4) | 0.1479 (17) | 0.7683 (9) | 0.039 (4)* | |
H16B | 0.6364 (4) | 0.1755 (18) | 0.7143 (9) | 0.036 (4)* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
C1 | 0.0429 (8) | 0.0259 (7) | 0.0328 (8) | −0.0036 (6) | 0.0105 (6) | −0.0034 (6) |
C2 | 0.0259 (6) | 0.0256 (6) | 0.0256 (7) | −0.0005 (5) | 0.0031 (5) | −0.0022 (5) |
C3 | 0.0225 (6) | 0.0240 (6) | 0.0226 (6) | −0.0017 (5) | 0.0005 (5) | 0.0007 (5) |
C4 | 0.0236 (6) | 0.0244 (6) | 0.0243 (7) | 0.0018 (5) | 0.0013 (5) | −0.0017 (5) |
C5 | 0.0336 (7) | 0.0251 (7) | 0.0321 (8) | 0.0000 (5) | 0.0056 (6) | −0.0049 (6) |
C6 | 0.0462 (8) | 0.0406 (8) | 0.0364 (9) | −0.0099 (7) | −0.0005 (7) | −0.0091 (7) |
C7 | 0.0367 (7) | 0.0239 (7) | 0.0396 (8) | −0.0051 (6) | −0.0029 (6) | −0.0010 (6) |
C8 | 0.0391 (7) | 0.0230 (6) | 0.0304 (8) | −0.0018 (5) | −0.0038 (6) | −0.0014 (5) |
C9 | 0.0276 (6) | 0.0227 (6) | 0.0198 (6) | 0.0009 (5) | 0.0001 (5) | 0.0018 (5) |
C10 | 0.0204 (5) | 0.0233 (6) | 0.0240 (7) | −0.0019 (5) | 0.0034 (5) | −0.0005 (5) |
C11 | 0.0281 (6) | 0.0218 (6) | 0.0341 (8) | −0.0007 (5) | −0.0001 (5) | −0.0002 (5) |
C12 | 0.0449 (8) | 0.0260 (7) | 0.0475 (10) | −0.0062 (6) | −0.0054 (7) | −0.0048 (6) |
C13 | 0.0449 (8) | 0.0263 (7) | 0.0415 (9) | 0.0080 (6) | 0.0153 (7) | 0.0099 (6) |
C14 | 0.0283 (6) | 0.0246 (6) | 0.0289 (7) | −0.0010 (5) | 0.0055 (5) | 0.0021 (5) |
C15 | 0.0192 (5) | 0.0228 (6) | 0.0257 (7) | −0.0007 (5) | 0.0012 (5) | −0.0020 (5) |
C16 | 0.0209 (6) | 0.0240 (6) | 0.0256 (7) | −0.0017 (5) | 0.0029 (5) | 0.0003 (5) |
C17 | 0.0259 (6) | 0.0243 (6) | 0.0353 (8) | 0.0014 (5) | 0.0075 (5) | 0.0004 (6) |
C18 | 0.0319 (7) | 0.0284 (7) | 0.0406 (8) | 0.0047 (6) | 0.0054 (6) | 0.0069 (6) |
C19 | 0.0429 (8) | 0.0322 (7) | 0.0480 (10) | 0.0047 (6) | 0.0104 (7) | −0.0036 (7) |
C20 | 0.0350 (7) | 0.0236 (6) | 0.0283 (7) | −0.0007 (5) | −0.0051 (6) | 0.0012 (5) |
C21 | 0.0219 (6) | 0.0248 (6) | 0.0243 (7) | −0.0011 (5) | 0.0016 (5) | 0.0028 (5) |
C22 | 0.0243 (6) | 0.0246 (6) | 0.0226 (6) | −0.0029 (5) | 0.0031 (5) | −0.0008 (5) |
C23 | 0.0326 (7) | 0.0254 (6) | 0.0294 (7) | 0.0005 (5) | 0.0003 (5) | 0.0002 (6) |
C24 | 0.0621 (10) | 0.0365 (8) | 0.0466 (10) | 0.0170 (7) | −0.0140 (8) | −0.0138 (7) |
N1 | 0.0213 (5) | 0.0231 (5) | 0.0218 (5) | −0.0009 (4) | 0.0033 (4) | −0.0016 (4) |
N2 | 0.0275 (5) | 0.0264 (6) | 0.0282 (6) | −0.0014 (4) | 0.0061 (5) | −0.0032 (5) |
N3 | 0.0309 (6) | 0.0272 (6) | 0.0293 (6) | −0.0002 (4) | 0.0068 (5) | −0.0040 (5) |
N4 | 0.0204 (5) | 0.0263 (6) | 0.0239 (6) | −0.0007 (4) | 0.0052 (4) | 0.0010 (4) |
N5 | 0.0189 (5) | 0.0213 (5) | 0.0222 (5) | −0.0004 (4) | 0.0005 (4) | 0.0004 (4) |
N6 | 0.0302 (5) | 0.0232 (5) | 0.0284 (6) | 0.0023 (4) | −0.0036 (5) | 0.0001 (5) |
N7 | 0.0249 (5) | 0.0234 (5) | 0.0294 (6) | −0.0001 (4) | −0.0015 (4) | −0.0007 (4) |
N8 | 0.0195 (5) | 0.0282 (5) | 0.0232 (6) | 0.0015 (4) | −0.0011 (4) | 0.0014 (5) |
N9 | 0.0201 (5) | 0.0216 (5) | 0.0228 (5) | −0.0010 (4) | 0.0034 (4) | −0.0016 (4) |
N10 | 0.0255 (5) | 0.0218 (5) | 0.0290 (6) | 0.0009 (4) | 0.0047 (4) | 0.0013 (4) |
N11 | 0.0261 (5) | 0.0231 (5) | 0.0286 (6) | 0.0011 (4) | 0.0064 (4) | 0.0023 (5) |
N12 | 0.0214 (5) | 0.0273 (6) | 0.0231 (6) | −0.0006 (4) | 0.0048 (4) | −0.0034 (5) |
N13 | 0.0212 (5) | 0.0232 (5) | 0.0215 (5) | −0.0017 (4) | −0.0003 (4) | 0.0007 (4) |
N14 | 0.0262 (5) | 0.0262 (5) | 0.0292 (6) | −0.0012 (4) | −0.0024 (5) | 0.0006 (5) |
N15 | 0.0268 (5) | 0.0249 (5) | 0.0293 (6) | −0.0021 (4) | 0.0001 (4) | −0.0013 (5) |
N16 | 0.0225 (5) | 0.0273 (6) | 0.0204 (6) | −0.0016 (4) | −0.0020 (4) | −0.0002 (5) |
Geometric parameters (Å, º) top
C1—C2 | 1.5166 (18) | C15—N9 | 1.3609 (15) |
C1—H1A | 0.9600 | C16—N11 | 1.3118 (16) |
C1—H1B | 0.9600 | C16—N9 | 1.3609 (16) |
C1—H1C | 0.9600 | C16—C17 | 1.4905 (17) |
C2—C3 | 1.4824 (17) | C17—C18 | 1.5170 (19) |
C2—H2A | 0.9700 | C17—H17A | 0.9700 |
C2—H2B | 0.9700 | C17—H17B | 0.9700 |
C3—N2 | 1.3099 (16) | C18—H18A | 0.9600 |
C3—N1 | 1.3648 (16) | C18—H18B | 0.9600 |
C4—N3 | 1.3111 (17) | C18—H18C | 0.9600 |
C4—N1 | 1.3596 (16) | C19—C20 | 1.5129 (19) |
C4—C5 | 1.4844 (17) | C19—H19A | 0.9600 |
C5—C6 | 1.521 (2) | C19—H19B | 0.9600 |
C5—H5A | 0.9700 | C19—H19C | 0.9600 |
C5—H5B | 0.9700 | C20—C21 | 1.4889 (18) |
C6—H6A | 0.9600 | C20—H20A | 0.9700 |
C6—H6B | 0.9600 | C20—H20B | 0.9700 |
C6—H6C | 0.9600 | C21—N14 | 1.3106 (17) |
C7—C8 | 1.521 (2) | C21—N13 | 1.3605 (16) |
C7—H7A | 0.9600 | C22—N15 | 1.3111 (17) |
C7—H7B | 0.9600 | C22—N13 | 1.3586 (16) |
C7—H7C | 0.9600 | C22—C23 | 1.4918 (18) |
C8—C9 | 1.4841 (17) | C23—C24 | 1.510 (2) |
C8—H8A | 0.9700 | C23—H23A | 0.9700 |
C8—H8B | 0.9700 | C23—H23B | 0.9700 |
C9—N6 | 1.3071 (17) | C24—H24A | 0.9600 |
C9—N5 | 1.3608 (16) | C24—H24B | 0.9600 |
C10—N7 | 1.3072 (16) | C24—H24C | 0.9600 |
C10—N5 | 1.3664 (15) | N1—N4 | 1.4130 (14) |
C10—C11 | 1.4883 (17) | N2—N3 | 1.3997 (15) |
C11—C12 | 1.5175 (19) | N4—H4A | 0.888 (16) |
C11—H11A | 0.9700 | N4—H4B | 0.925 (18) |
C11—H11B | 0.9700 | N5—N8 | 1.4118 (14) |
C12—H12A | 0.9600 | N6—N7 | 1.3981 (15) |
C12—H12B | 0.9600 | N8—H8C | 0.910 (17) |
C12—H12C | 0.9600 | N8—H8D | 0.923 (19) |
C13—C14 | 1.5140 (18) | N9—N12 | 1.4109 (14) |
C13—H13A | 0.9600 | N10—N11 | 1.4016 (14) |
C13—H13B | 0.9600 | N12—H12D | 0.929 (16) |
C13—H13C | 0.9600 | N12—H12E | 0.952 (16) |
C14—C15 | 1.4883 (17) | N13—N16 | 1.4119 (14) |
C14—H14A | 0.9700 | N14—N15 | 1.3984 (15) |
C14—H14B | 0.9700 | N16—H16A | 0.931 (17) |
C15—N10 | 1.3110 (16) | N16—H16B | 0.942 (17) |
| | | |
C2—C1—H1A | 109.5 | N11—C16—C17 | 127.05 (11) |
C2—C1—H1B | 109.5 | N9—C16—C17 | 123.51 (11) |
H1A—C1—H1B | 109.5 | C16—C17—C18 | 113.18 (11) |
C2—C1—H1C | 109.5 | C16—C17—H17A | 108.9 |
H1A—C1—H1C | 109.5 | C18—C17—H17A | 108.9 |
H1B—C1—H1C | 109.5 | C16—C17—H17B | 108.9 |
C3—C2—C1 | 112.56 (11) | C18—C17—H17B | 108.9 |
C3—C2—H2A | 109.1 | H17A—C17—H17B | 107.8 |
C1—C2—H2A | 109.1 | C17—C18—H18A | 109.5 |
C3—C2—H2B | 109.1 | C17—C18—H18B | 109.5 |
C1—C2—H2B | 109.1 | H18A—C18—H18B | 109.5 |
H2A—C2—H2B | 107.8 | C17—C18—H18C | 109.5 |
N2—C3—N1 | 109.33 (11) | H18A—C18—H18C | 109.5 |
N2—C3—C2 | 127.23 (11) | H18B—C18—H18C | 109.5 |
N1—C3—C2 | 123.43 (11) | C20—C19—H19A | 109.5 |
N3—C4—N1 | 109.37 (11) | C20—C19—H19B | 109.5 |
N3—C4—C5 | 125.84 (11) | H19A—C19—H19B | 109.5 |
N1—C4—C5 | 124.72 (11) | C20—C19—H19C | 109.5 |
C4—C5—C6 | 112.56 (12) | H19A—C19—H19C | 109.5 |
C4—C5—H5A | 109.1 | H19B—C19—H19C | 109.5 |
C6—C5—H5A | 109.1 | C21—C20—C19 | 112.96 (11) |
C4—C5—H5B | 109.1 | C21—C20—H20A | 109.0 |
C6—C5—H5B | 109.1 | C19—C20—H20A | 109.0 |
H5A—C5—H5B | 107.8 | C21—C20—H20B | 109.0 |
C5—C6—H6A | 109.5 | C19—C20—H20B | 109.0 |
C5—C6—H6B | 109.5 | H20A—C20—H20B | 107.8 |
H6A—C6—H6B | 109.5 | N14—C21—N13 | 109.15 (11) |
C5—C6—H6C | 109.5 | N14—C21—C20 | 126.94 (11) |
H6A—C6—H6C | 109.5 | N13—C21—C20 | 123.90 (11) |
H6B—C6—H6C | 109.5 | N15—C22—N13 | 109.27 (11) |
C8—C7—H7A | 109.5 | N15—C22—C23 | 126.93 (12) |
C8—C7—H7B | 109.5 | N13—C22—C23 | 123.80 (11) |
H7A—C7—H7B | 109.5 | C22—C23—C24 | 113.35 (12) |
C8—C7—H7C | 109.5 | C22—C23—H23A | 108.9 |
H7A—C7—H7C | 109.5 | C24—C23—H23A | 108.9 |
H7B—C7—H7C | 109.5 | C22—C23—H23B | 108.9 |
C9—C8—C7 | 111.65 (11) | C24—C23—H23B | 108.9 |
C9—C8—H8A | 109.3 | H23A—C23—H23B | 107.7 |
C7—C8—H8A | 109.3 | C23—C24—H24A | 109.5 |
C9—C8—H8B | 109.3 | C23—C24—H24B | 109.5 |
C7—C8—H8B | 109.3 | H24A—C24—H24B | 109.5 |
H8A—C8—H8B | 108.0 | C23—C24—H24C | 109.5 |
N6—C9—N5 | 109.46 (11) | H24A—C24—H24C | 109.5 |
N6—C9—C8 | 125.10 (11) | H24B—C24—H24C | 109.5 |
N5—C9—C8 | 125.33 (11) | C4—N1—C3 | 106.52 (10) |
N7—C10—N5 | 109.49 (11) | C4—N1—N4 | 124.47 (10) |
N7—C10—C11 | 126.25 (11) | C3—N1—N4 | 128.97 (10) |
N5—C10—C11 | 124.27 (11) | C3—N2—N3 | 107.34 (10) |
C10—C11—C12 | 111.53 (11) | C4—N3—N2 | 107.44 (10) |
C10—C11—H11A | 109.3 | N1—N4—H4A | 105.5 (10) |
C12—C11—H11A | 109.3 | N1—N4—H4B | 107.4 (10) |
C10—C11—H11B | 109.3 | H4A—N4—H4B | 109.1 (14) |
C12—C11—H11B | 109.3 | C9—N5—C10 | 106.20 (10) |
H11A—C11—H11B | 108.0 | C9—N5—N8 | 124.79 (10) |
C11—C12—H12A | 109.5 | C10—N5—N8 | 128.84 (10) |
C11—C12—H12B | 109.5 | C9—N6—N7 | 107.58 (10) |
H12A—C12—H12B | 109.5 | C10—N7—N6 | 107.26 (10) |
C11—C12—H12C | 109.5 | N5—N8—H8C | 106.6 (10) |
H12A—C12—H12C | 109.5 | N5—N8—H8D | 105.0 (10) |
H12B—C12—H12C | 109.5 | H8C—N8—H8D | 109.6 (14) |
C14—C13—H13A | 109.5 | C16—N9—C15 | 106.49 (10) |
C14—C13—H13B | 109.5 | C16—N9—N12 | 129.02 (10) |
H13A—C13—H13B | 109.5 | C15—N9—N12 | 124.46 (10) |
C14—C13—H13C | 109.5 | C15—N10—N11 | 107.27 (10) |
H13A—C13—H13C | 109.5 | C16—N11—N10 | 107.29 (10) |
H13B—C13—H13C | 109.5 | N9—N12—H12D | 104.7 (10) |
C15—C14—C13 | 113.10 (11) | N9—N12—H12E | 105.7 (9) |
C15—C14—H14A | 109.0 | H12D—N12—H12E | 110.3 (13) |
C13—C14—H14A | 109.0 | C22—N13—C21 | 106.77 (10) |
C15—C14—H14B | 109.0 | C22—N13—N16 | 124.57 (10) |
C13—C14—H14B | 109.0 | C21—N13—N16 | 128.60 (10) |
H14A—C14—H14B | 107.8 | C21—N14—N15 | 107.47 (10) |
N10—C15—N9 | 109.50 (11) | C22—N15—N14 | 107.33 (10) |
N10—C15—C14 | 126.83 (11) | N13—N16—H16A | 105.7 (10) |
N9—C15—C14 | 123.67 (11) | N13—N16—H16B | 106.1 (10) |
N11—C16—N9 | 109.44 (11) | H16A—N16—H16B | 108.7 (14) |
| | | |
C1—C2—C3—N2 | 3.02 (19) | C11—C10—N5—C9 | −179.51 (12) |
C1—C2—C3—N1 | −176.05 (11) | N7—C10—N5—N8 | 175.80 (11) |
N3—C4—C5—C6 | −97.49 (16) | C11—C10—N5—N8 | −4.1 (2) |
N1—C4—C5—C6 | 79.22 (17) | N5—C9—N6—N7 | −0.50 (14) |
C7—C8—C9—N6 | −72.20 (17) | C8—C9—N6—N7 | 175.86 (12) |
C7—C8—C9—N5 | 103.58 (15) | N5—C10—N7—N6 | −0.64 (14) |
N7—C10—C11—C12 | 10.99 (19) | C11—C10—N7—N6 | 179.21 (12) |
N5—C10—C11—C12 | −169.17 (12) | C9—N6—N7—C10 | 0.71 (14) |
C13—C14—C15—N10 | −19.36 (19) | N11—C16—N9—C15 | 0.13 (14) |
C13—C14—C15—N9 | 161.51 (12) | C17—C16—N9—C15 | −179.70 (12) |
N11—C16—C17—C18 | −12.44 (19) | N11—C16—N9—N12 | −178.20 (11) |
N9—C16—C17—C18 | 167.36 (12) | C17—C16—N9—N12 | 2.0 (2) |
C19—C20—C21—N14 | 37.34 (19) | N10—C15—N9—C16 | −0.25 (14) |
C19—C20—C21—N13 | −144.16 (13) | C14—C15—N9—C16 | 179.02 (11) |
N15—C22—C23—C24 | 31.6 (2) | N10—C15—N9—N12 | 178.18 (10) |
N13—C22—C23—C24 | −148.35 (13) | C14—C15—N9—N12 | −2.56 (18) |
N3—C4—N1—C3 | 0.15 (14) | N9—C15—N10—N11 | 0.27 (13) |
C5—C4—N1—C3 | −177.02 (12) | C14—C15—N10—N11 | −178.97 (12) |
N3—C4—N1—N4 | −177.70 (11) | N9—C16—N11—N10 | 0.03 (13) |
C5—C4—N1—N4 | 5.12 (19) | C17—C16—N11—N10 | 179.86 (12) |
N2—C3—N1—C4 | 0.08 (14) | C15—N10—N11—C16 | −0.18 (13) |
C2—C3—N1—C4 | 179.29 (12) | N15—C22—N13—C21 | 0.34 (14) |
N2—C3—N1—N4 | 177.80 (11) | C23—C22—N13—C21 | −179.68 (11) |
C2—C3—N1—N4 | −3.0 (2) | N15—C22—N13—N16 | 177.83 (11) |
N1—C3—N2—N3 | −0.26 (14) | C23—C22—N13—N16 | −2.19 (19) |
C2—C3—N2—N3 | −179.44 (12) | N14—C21—N13—C22 | −0.14 (14) |
N1—C4—N3—N2 | −0.31 (14) | C20—C21—N13—C22 | −178.87 (12) |
C5—C4—N3—N2 | 176.82 (12) | N14—C21—N13—N16 | −177.50 (11) |
C3—N2—N3—C4 | 0.35 (14) | C20—C21—N13—N16 | 3.77 (19) |
N6—C9—N5—C10 | 0.11 (14) | N13—C21—N14—N15 | −0.10 (14) |
C8—C9—N5—C10 | −176.23 (12) | C20—C21—N14—N15 | 178.58 (12) |
N6—C9—N5—N8 | −175.57 (11) | N13—C22—N15—N14 | −0.39 (14) |
C8—C9—N5—N8 | 8.08 (19) | C23—C22—N15—N14 | 179.63 (12) |
N7—C10—N5—C9 | 0.35 (14) | C21—N14—N15—C22 | 0.31 (14) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N8—H8C···N10 | 0.910 (17) | 2.192 (17) | 3.0975 (15) | 173.4 (14) |
N8—H8D···N3i | 0.923 (19) | 2.088 (19) | 2.9645 (16) | 158.2 (15) |
N12—H12D···N14 | 0.929 (16) | 2.108 (16) | 3.0295 (15) | 171.6 (14) |
N12—H12E···N15ii | 0.952 (16) | 2.127 (17) | 3.0650 (16) | 168.0 (13) |
N16—H16A···N11iii | 0.931 (17) | 2.112 (18) | 3.0256 (16) | 166.7 (14) |
N16—H16B···N2iv | 0.942 (17) | 2.070 (17) | 3.0066 (15) | 172.9 (14) |
N4—H4A···N6v | 0.888 (16) | 2.195 (17) | 3.0803 (15) | 174.8 (14) |
N4—H4B···N7 | 0.925 (18) | 2.161 (18) | 3.0736 (16) | 168.8 (14) |
Symmetry codes: (i) x, −y+1, z+1/2; (ii) −x+1, −y, −z+1; (iii) −x+1, y, −z+3/2; (iv) −x+1, −y+1, −z+1; (v) −x+1/2, −y+3/2, −z+1. |
Experimental details
Crystal data |
Chemical formula | C6H12N4 |
Mr | 140.20 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 100 |
a, b, c (Å) | 37.782 (2), 9.2996 (4), 18.4055 (12) |
β (°) | 93.067 (5) |
V (Å3) | 6457.6 (7) |
Z | 32 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.50 × 0.48 × 0.41 |
|
Data collection |
Diffractometer | Stoe IPDS II diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16583, 6331, 4902 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.617 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.091, 1.04 |
No. of reflections | 6331 |
No. of parameters | 393 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.16, −0.23 |
Selected bond lengths (Å) topN1—N4 | 1.4130 (14) | N9—N12 | 1.4109 (14) |
N2—N3 | 1.3997 (15) | N10—N11 | 1.4016 (14) |
N5—N8 | 1.4118 (14) | N13—N16 | 1.4119 (14) |
N6—N7 | 1.3981 (15) | N14—N15 | 1.3984 (15) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N8—H8C···N10 | 0.910 (17) | 2.192 (17) | 3.0975 (15) | 173.4 (14) |
N8—H8D···N3i | 0.923 (19) | 2.088 (19) | 2.9645 (16) | 158.2 (15) |
N12—H12D···N14 | 0.929 (16) | 2.108 (16) | 3.0295 (15) | 171.6 (14) |
N12—H12E···N15ii | 0.952 (16) | 2.127 (17) | 3.0650 (16) | 168.0 (13) |
N16—H16A···N11iii | 0.931 (17) | 2.112 (18) | 3.0256 (16) | 166.7 (14) |
N16—H16B···N2iv | 0.942 (17) | 2.070 (17) | 3.0066 (15) | 172.9 (14) |
N4—H4A···N6v | 0.888 (16) | 2.195 (17) | 3.0803 (15) | 174.8 (14) |
N4—H4B···N7 | 0.925 (18) | 2.161 (18) | 3.0736 (16) | 168.8 (14) |
Symmetry codes: (i) x, −y+1, z+1/2; (ii) −x+1, −y, −z+1; (iii) −x+1, y, −z+3/2; (iv) −x+1, −y+1, −z+1; (v) −x+1/2, −y+3/2, −z+1. |
1,2,4-Triazole and its derivatives have been used as starting materials for the synthesis of many heterocycles (Desenko, 1995). The triazole ring, having strong σ-donor and weak π-acceptor properties, potentially has two different coordination modes through three N donor atoms coordinating to metal ions (Van Diemen et al., 1991; Ding et al., 2004; Yi et al., 2004; Ren et al., 2006). Recent interest in substituted 1,2,4-triazoles has arisen in part from their transition metal complexes with intriguing structures and specific magnetic properties (Zhou et al., 2005, 2006). Many metal complexes containing substituted 1,2,4-triazole have potential applications in molecular-based memory devices, displays and optical switches owing to their spin crossover properties (Garcia et al., 1997; Kahn & Martinez, 1998). Apart from their chemical significance, 1,2,4-triazole derivatives have been found to be associated with diverse pharmacological properties, such as anti-inflammatory, antifungal and antiviral (Massa et al., 1992; Mahomed et al., 1993; Mullican et al., 1993). Some of them are also known to exhibit analgesic, anticonvulsant, tranquilizing, antidepressant, anxiolytic (Bradbury & Rivett, 1991; Sughen & Yoloye, 1978; Stillings et al., 1986; Kane et al., 1988) or even antitumour activities (Hatheway et al., 1978) and are applied in therapy (e.g. alprazolam, estazolam, triazolam and adinazolam; Budavari et al., 1996). In spite of the chemical and medicinal importance of this class of compounds, relatively few crystal structure of 1,2,4-triazole derivatives have been reported (Cambridge Structural Database, Version 5.27 of November, 2005; Allen, 2002). In order to clarify the structure of this type of compound, an X-ray structure determination of the title compound, (I), has been carried out, and the results are presented here. The structure of this compound has been confirmed by IR, 1H NMR and 13C NMR spectroscopies and by elemental analysis.
The molecular structure and atom-numbering scheme are shown in Fig. 1; selected bond lengths are given in Table 1. Compound (I) crystallizes in space group C2/c with Z' = 4, and the hydrogen bonding was analysed with the aid of PLATON (Spek, 2003). The asymmetric unit of (I) contains four independent molecules with statistically equivalent metrical parameters but different conformations. The N1—N4, N5—N8, N9—N12 and N13—N16 bond lengths (Table 1) indicate single-bond character, whereas the N2—N3, N6—N7, N10—N11 and N14—N15 bond lengths are indicative of significant double-bond character. Similar N—N and N═N bond length values have been observed in 4-amino-3-methyl-5-(p-tolyl)-4H-1,2,4-triazole and 4-amino-3-methyl-5-phenyl-4H-1,2,4-triazole [N—N = 1.4090 (16) and 1.4081 (18) Å, and N═N = 1.3859 (19) and 1.396 (2) Å; Şahin et al., 2006]. The H atoms of the amino group form hydrogen bonds with N atoms of neighbouring triazole rings. The geometric parameters of the N—H···N hydrogen-bonding interactions are given in Table 2.
Amino atom N4 in the reference molecule at (x, y, z) acts as a hydrogen-bond donor, via H4B, to atom N7 within the asymmetric unit and, via H4A, to atom N6v (symmetry codes are described in the footnote of Table 2), so forming a centrosymmetric R44(10) (A) (Bernstein et al., 1995) ring centred at (1/4, 3/4, 1/2). Similarly, amino atom N12 acts as a hydrogen-bond donor, via H12D, to atom N14 within the asymmetric unit and, via H12F, to atom N15ii, so forming a second centrosymmetric ring motif, this time of R44(10) (B) type, centred at (1/2, 0, 1/2). The arrangement of the N8—H8C···N10, N8—H8D···N3i, N16iii—H16Aiii···N11 and N16iii—H16Biii···N2i interactions can be described by the graph-set notation R44(10) (C). At the same time, the N16—H16A···N11iii, N16—H16B···N2iv, N8iii—H8Ciii···N10iii and N8iii—H8Diii···N3iv interactions constitute an R44(10) ring (D). Finally, the N12—H12D···N14, N16—H16A···N11iii, N12iii—H12Diii···N14iii and N16iii—H16Aiii···N11 interactions produce an R44(20) (E) ring (Fig. 2).
Propagation of pairs of four eight [please clarify] hydrogen bonds then forms a chain of edge-fused rings, containing R44(10)[A]R44(10)[B]R44(10)[C]R44(10)[D] sequences of four edge-fused rings. Similarly, edge-fused R44(10) (C) and R44(20) (E) rings form a chain running along the c axis. In compound (I), interlinked C44(20) antiparallel chains zigzagging along the a axis are formed through N4v—H4Av···N6, N8—H8C···N10, N12—H12D···N14 and N16—H16B···N2iv interactions. Amino atom N16 in the molecule at (x, -y, -1/2 + z) acts as hydrogen-bond donor, via H16A, to N11ii, while N12ii acts as donor to N15, and in this manner a C22(10) chain running parallel to the [001] direction is generated.
These intermolecular interactions, namely an extensive network of hydrogen bonds and π-ring interactions, are responsible for constructing an infinite three-dimensional framework.