The molecule of the title compound, C16H26N6, is located on a crystallographic centre of inversion; as a result, there is just one half-molecule in the asymmetric unit. The piperazine ring adopts an ideal chair conformation. The substituents at the piperazine N atoms are in equatorial positions.
Supporting information
CCDC reference: 601246
Key indicators
- Single-crystal X-ray study
- T = 173 K
- Mean (C-C)= 0.002 Å
- R factor = 0.034
- wR factor = 0.100
- Data-to-parameter ratio = 15.3
checkCIF/PLATON results
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Data collection: X-AREA (Stoe & Cie, 2001); cell refinement: X-AREA; data reduction: X-AREA; program(s) used to solve structure: SHELXS97 (Sheldrick, 1990); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PLATON.
N,
N'-Bis(3,5-dimethyl-1
H-pyrazol-1-ylmethyl)piperazine
top
Crystal data top
C16H26N6 | F(000) = 656 |
Mr = 302.43 | Dx = 1.241 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 14373 reflections |
a = 9.6944 (9) Å | θ = 3.6–25.7° |
b = 12.1761 (11) Å | µ = 0.08 mm−1 |
c = 13.7141 (12) Å | T = 173 K |
V = 1618.8 (3) Å3 | Block, colourless |
Z = 4 | 0.28 × 0.26 × 0.23 mm |
Data collection top
Stoe IPDS-II two-circle diffractometer | 1319 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.044 |
Graphite monochromator | θmax = 25.8°, θmin = 3.6° |
ω scans | h = −11→11 |
16864 measured reflections | k = −14→14 |
1560 independent reflections | l = −16→16 |
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) = 0.100 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0595P)2 + 0.1979P] where P = (Fo2 + 2Fc2)/3 |
1560 reflections | (Δ/σ)max < 0.001 |
102 parameters | Δρmax = 0.20 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
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 | x | y | z | Uiso*/Ueq | |
N1 | 0.63520 (11) | 0.75690 (8) | 0.57756 (8) | 0.0323 (3) | |
N2 | 0.53750 (11) | 0.83475 (8) | 0.55889 (8) | 0.0336 (3) | |
C3 | 0.52427 (14) | 0.89020 (10) | 0.64202 (9) | 0.0337 (3) | |
C31 | 0.42534 (16) | 0.98411 (11) | 0.64889 (11) | 0.0423 (3) | |
H31A | 0.4257 | 1.0252 | 0.5874 | 0.064* | |
H31B | 0.4531 | 1.0328 | 0.7023 | 0.064* | |
H31C | 0.3323 | 0.9559 | 0.6614 | 0.064* | |
C4 | 0.61322 (14) | 0.84879 (10) | 0.71357 (9) | 0.0364 (3) | |
H4 | 0.6231 | 0.8745 | 0.7786 | 0.044* | |
C5 | 0.68335 (13) | 0.76330 (10) | 0.67056 (9) | 0.0345 (3) | |
C51 | 0.79386 (15) | 0.69068 (11) | 0.71012 (11) | 0.0434 (3) | |
H51A | 0.7552 | 0.6181 | 0.7246 | 0.065* | |
H51B | 0.8313 | 0.7229 | 0.7700 | 0.065* | |
H51C | 0.8677 | 0.6832 | 0.6618 | 0.065* | |
C11 | 0.67623 (14) | 0.68471 (10) | 0.49670 (9) | 0.0345 (3) | |
H11A | 0.6712 | 0.7276 | 0.4355 | 0.041* | |
H11B | 0.7740 | 0.6639 | 0.5064 | 0.041* | |
N11 | 0.59721 (11) | 0.58543 (8) | 0.48357 (8) | 0.0311 (3) | |
C12 | 0.62058 (14) | 0.50220 (10) | 0.55841 (9) | 0.0343 (3) | |
H12A | 0.5834 | 0.5281 | 0.6216 | 0.041* | |
H12B | 0.7208 | 0.4894 | 0.5662 | 0.041* | |
C13 | 0.55008 (14) | 0.39611 (10) | 0.52938 (10) | 0.0337 (3) | |
H13A | 0.5905 | 0.3684 | 0.4678 | 0.040* | |
H13B | 0.5650 | 0.3400 | 0.5806 | 0.040* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
N1 | 0.0304 (6) | 0.0320 (5) | 0.0345 (6) | −0.0017 (4) | 0.0002 (4) | 0.0001 (4) |
N2 | 0.0310 (6) | 0.0328 (5) | 0.0370 (6) | −0.0008 (4) | 0.0002 (4) | 0.0000 (4) |
C3 | 0.0300 (7) | 0.0349 (6) | 0.0363 (7) | −0.0077 (5) | 0.0037 (5) | −0.0016 (5) |
C31 | 0.0374 (8) | 0.0416 (7) | 0.0481 (8) | −0.0009 (6) | 0.0033 (6) | −0.0076 (6) |
C4 | 0.0360 (7) | 0.0417 (6) | 0.0314 (6) | −0.0104 (5) | 0.0018 (5) | −0.0016 (5) |
C5 | 0.0300 (7) | 0.0372 (6) | 0.0362 (6) | −0.0094 (5) | −0.0018 (5) | 0.0049 (5) |
C51 | 0.0383 (8) | 0.0430 (7) | 0.0488 (8) | −0.0073 (6) | −0.0095 (6) | 0.0076 (6) |
C11 | 0.0325 (7) | 0.0347 (6) | 0.0363 (6) | −0.0017 (5) | 0.0048 (5) | −0.0007 (5) |
N11 | 0.0276 (6) | 0.0300 (5) | 0.0356 (6) | 0.0009 (4) | −0.0002 (4) | 0.0013 (4) |
C12 | 0.0302 (7) | 0.0349 (6) | 0.0377 (7) | 0.0025 (5) | −0.0061 (5) | 0.0021 (5) |
C13 | 0.0301 (7) | 0.0314 (6) | 0.0396 (7) | 0.0041 (5) | −0.0035 (5) | 0.0036 (5) |
Geometric parameters (Å, º) top
N1—C5 | 1.3604 (17) | C51—H51B | 0.9800 |
N1—N2 | 1.3642 (15) | C51—H51C | 0.9800 |
N1—C11 | 1.4698 (16) | C11—N11 | 1.4424 (16) |
N2—C3 | 1.3312 (17) | C11—H11A | 0.9900 |
C3—C4 | 1.4003 (19) | C11—H11B | 0.9900 |
C3—C31 | 1.4954 (19) | N11—C13i | 1.4563 (17) |
C31—H31A | 0.9800 | N11—C12 | 1.4601 (16) |
C31—H31B | 0.9800 | C12—C13 | 1.5147 (17) |
C31—H31C | 0.9800 | C12—H12A | 0.9900 |
C4—C5 | 1.3761 (19) | C12—H12B | 0.9900 |
C4—H4 | 0.9500 | C13—N11i | 1.4563 (17) |
C5—C51 | 1.4913 (19) | C13—H13A | 0.9900 |
C51—H51A | 0.9800 | C13—H13B | 0.9900 |
| | | |
C5—N1—N2 | 111.99 (10) | H51A—C51—H51C | 109.5 |
C5—N1—C11 | 130.44 (11) | H51B—C51—H51C | 109.5 |
N2—N1—C11 | 117.50 (10) | N11—C11—N1 | 116.85 (10) |
C3—N2—N1 | 104.99 (10) | N11—C11—H11A | 108.1 |
N2—C3—C4 | 110.99 (12) | N1—C11—H11A | 108.1 |
N2—C3—C31 | 120.24 (12) | N11—C11—H11B | 108.1 |
C4—C3—C31 | 128.77 (12) | N1—C11—H11B | 108.1 |
C3—C31—H31A | 109.5 | H11A—C11—H11B | 107.3 |
C3—C31—H31B | 109.5 | C11—N11—C13i | 113.99 (10) |
H31A—C31—H31B | 109.5 | C11—N11—C12 | 114.30 (10) |
C3—C31—H31C | 109.5 | C13i—N11—C12 | 110.19 (10) |
H31A—C31—H31C | 109.5 | N11—C12—C13 | 109.71 (10) |
H31B—C31—H31C | 109.5 | N11—C12—H12A | 109.7 |
C5—C4—C3 | 106.03 (11) | C13—C12—H12A | 109.7 |
C5—C4—H4 | 127.0 | N11—C12—H12B | 109.7 |
C3—C4—H4 | 127.0 | C13—C12—H12B | 109.7 |
N1—C5—C4 | 106.01 (11) | H12A—C12—H12B | 108.2 |
N1—C5—C51 | 123.61 (12) | N11i—C13—C12 | 110.05 (10) |
C4—C5—C51 | 130.35 (12) | N11i—C13—H13A | 109.7 |
C5—C51—H51A | 109.5 | C12—C13—H13A | 109.7 |
C5—C51—H51B | 109.5 | N11i—C13—H13B | 109.7 |
H51A—C51—H51B | 109.5 | C12—C13—H13B | 109.7 |
C5—C51—H51C | 109.5 | H13A—C13—H13B | 108.2 |
| | | |
C5—N1—N2—C3 | −0.30 (13) | C3—C4—C5—N1 | 0.01 (13) |
C11—N1—N2—C3 | −177.62 (10) | C3—C4—C5—C51 | 178.04 (13) |
N1—N2—C3—C4 | 0.29 (14) | C5—N1—C11—N11 | 94.59 (16) |
N1—N2—C3—C31 | 179.46 (11) | N2—N1—C11—N11 | −88.67 (13) |
N2—C3—C4—C5 | −0.19 (14) | N1—C11—N11—C13i | 56.56 (14) |
C31—C3—C4—C5 | −179.27 (13) | N1—C11—N11—C12 | −71.42 (14) |
N2—N1—C5—C4 | 0.18 (14) | C11—N11—C12—C13 | −171.42 (10) |
C11—N1—C5—C4 | 177.07 (11) | C13i—N11—C12—C13 | 58.69 (15) |
N2—N1—C5—C51 | −178.02 (11) | N11—C12—C13—N11i | −58.61 (15) |
C11—N1—C5—C51 | −1.1 (2) | C12i—C13i—N11—C12 | −58.89 (14) |
Symmetry code: (i) −x+1, −y+1, −z+1. |