The title compound, C20H18N4O2·2H2O, an amide-containing bipyridyl-type compound, crystallizes as a dihydrate. The organic molecule is centrosymmetric. Hydrogen-bonding and π–π stacking interactions in the crystal structure result in the formation of an infinite three-dimensional supramolecular network.
Supporting information
CCDC reference: 277746
Key indicators
- Single-crystal X-ray study
- T = 295 K
- Mean (C-C) = 0.003 Å
- R factor = 0.039
- wR factor = 0.129
- Data-to-parameter ratio = 12.1
checkCIF/PLATON results
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Alert level C
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ .... ?
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
1 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
0 ALERT type 2 Indicator that the structure model may be wrong or deficient
0 ALERT type 3 Indicator that the structure quality may be low
0 ALERT type 4 Improvement, methodology, query or suggestion
Data collection: XSCANS (Siemens, 1996); cell refinement: XSCANS; data reduction: SHELXTL (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL; software used to prepare material for publication: SHELXL97.
N,
N'-Bis(3-pyridylmethyl)benzene-1,4-dicarboxamide dihydrate
top
Crystal data top
C20H18N4O2·2H2O | F(000) = 404 |
Mr = 382.42 | Dx = 1.318 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P2yn | Cell parameters from 49 reflections |
a = 7.3871 (7) Å | θ = 2.9–17.9° |
b = 13.8981 (16) Å | µ = 0.09 mm−1 |
c = 9.8971 (12) Å | T = 295 K |
β = 108.441 (8)° | Block, colourless |
V = 963.92 (19) Å3 | 0.4 × 0.4 × 0.3 mm |
Z = 2 | |
Data collection top
Bruker P4 diffractometer | 1125 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.022 |
Graphite monochromator | θmax = 25.0°, θmin = 2.6° |
ω scans | h = −1→8 |
Absorption correction: ψ scan (North et al., 1968) | k = −1→16 |
Tmin = 0.972, Tmax = 0.973 | l = −11→11 |
2294 measured reflections | 3 standard reflections every 97 reflections |
1694 independent reflections | intensity decay: none |
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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.129 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | w = 1/[σ2(Fo2) + (0.0524P)2 + 0.1416P] where P = (Fo2 + 2Fc2)/3 |
1694 reflections | (Δ/σ)max < 0.001 |
140 parameters | Δρmax = 0.14 e Å−3 |
0 restraints | Δρmin = −0.15 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 | |
O1 | 0.1031 (2) | 0.64269 (11) | 0.53852 (17) | 0.0652 (5) | |
N2 | 0.2308 (3) | 0.72784 (12) | 0.39663 (19) | 0.0514 (5) | |
C9 | 0.5512 (3) | 0.59389 (14) | 0.4830 (2) | 0.0466 (5) | |
H8 | 0.5861 | 0.6570 | 0.4719 | 0.056* | |
C2 | 0.1881 (3) | 0.89701 (14) | 0.4584 (2) | 0.0468 (5) | |
C10 | 0.6814 (3) | 0.52038 (14) | 0.4960 (2) | 0.0465 (5) | |
H9 | 0.8032 | 0.5343 | 0.4930 | 0.056* | |
C8 | 0.3675 (3) | 0.57395 (13) | 0.48640 (19) | 0.0426 (5) | |
C7 | 0.2230 (3) | 0.65153 (14) | 0.4759 (2) | 0.0458 (5) | |
N1 | 0.2225 (3) | 1.06881 (13) | 0.4619 (2) | 0.0648 (6) | |
C6 | 0.1000 (3) | 0.80877 (14) | 0.3750 (2) | 0.0531 (5) | |
H6 | −0.0099 | 0.7897 | 0.4023 | 0.064* | |
H5 | 0.0553 | 0.8248 | 0.2744 | 0.064* | |
C1 | 0.1550 (3) | 0.98634 (14) | 0.3954 (2) | 0.0550 (6) | |
H1 | 0.0807 | 0.9896 | 0.3001 | 0.066* | |
C5 | 0.3302 (4) | 1.06237 (18) | 0.5977 (3) | 0.0718 (7) | |
H4 | 0.3805 | 1.1186 | 0.6458 | 0.086* | |
C4 | 0.3704 (4) | 0.97721 (19) | 0.6699 (3) | 0.0753 (8) | |
H3 | 0.4448 | 0.9760 | 0.7653 | 0.090* | |
C3 | 0.2995 (3) | 0.89342 (18) | 0.5996 (2) | 0.0648 (6) | |
H2 | 0.3263 | 0.8347 | 0.6467 | 0.078* | |
O1W | 0.0906 (3) | 0.24112 (14) | 0.3155 (2) | 0.0839 (7) | |
H7 | 0.307 (3) | 0.7272 (16) | 0.349 (3) | 0.065 (7)* | |
H1W | 0.030 (4) | 0.2750 (19) | 0.364 (3) | 0.093 (9)* | |
H2W | 0.134 (4) | 0.184 (2) | 0.364 (3) | 0.107 (10)* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1 | 0.0712 (10) | 0.0551 (9) | 0.0850 (11) | 0.0114 (8) | 0.0469 (9) | 0.0103 (8) |
N2 | 0.0599 (11) | 0.0436 (10) | 0.0579 (11) | 0.0091 (8) | 0.0290 (9) | 0.0041 (8) |
C9 | 0.0499 (11) | 0.0373 (10) | 0.0534 (11) | −0.0019 (9) | 0.0172 (9) | 0.0018 (8) |
C2 | 0.0473 (11) | 0.0467 (11) | 0.0489 (11) | 0.0063 (9) | 0.0186 (9) | 0.0024 (9) |
C10 | 0.0447 (11) | 0.0443 (11) | 0.0520 (11) | −0.0019 (9) | 0.0173 (9) | 0.0011 (9) |
C8 | 0.0478 (11) | 0.0395 (10) | 0.0414 (10) | 0.0009 (9) | 0.0155 (9) | −0.0024 (8) |
C7 | 0.0512 (12) | 0.0405 (11) | 0.0479 (10) | 0.0002 (9) | 0.0187 (9) | −0.0025 (8) |
N1 | 0.0737 (13) | 0.0466 (11) | 0.0776 (13) | −0.0002 (10) | 0.0289 (11) | −0.0011 (10) |
C6 | 0.0578 (12) | 0.0440 (11) | 0.0553 (12) | 0.0084 (10) | 0.0147 (10) | 0.0048 (9) |
C1 | 0.0644 (14) | 0.0470 (12) | 0.0552 (12) | 0.0063 (10) | 0.0212 (11) | 0.0034 (10) |
C5 | 0.0634 (15) | 0.0606 (15) | 0.0888 (18) | −0.0051 (13) | 0.0205 (14) | −0.0224 (14) |
C4 | 0.0682 (16) | 0.0813 (18) | 0.0627 (14) | 0.0078 (14) | 0.0013 (13) | −0.0131 (13) |
C3 | 0.0700 (15) | 0.0596 (14) | 0.0556 (13) | 0.0101 (12) | 0.0068 (11) | 0.0053 (11) |
O1W | 0.1330 (18) | 0.0609 (11) | 0.0824 (13) | 0.0178 (11) | 0.0687 (13) | 0.0086 (9) |
Geometric parameters (Å, º) top
O1—C7 | 1.237 (2) | C8—C7 | 1.498 (3) |
N2—C7 | 1.331 (2) | N1—C5 | 1.331 (3) |
N2—C6 | 1.454 (3) | N1—C1 | 1.337 (3) |
N2—H7 | 0.84 (3) | C6—H6 | 0.9700 |
C9—C10 | 1.381 (3) | C6—H5 | 0.9700 |
C9—C8 | 1.395 (3) | C1—H1 | 0.9300 |
C9—H8 | 0.9300 | C5—C4 | 1.366 (4) |
C2—C1 | 1.376 (3) | C5—H4 | 0.9300 |
C2—C3 | 1.380 (3) | C4—C3 | 1.373 (3) |
C2—C6 | 1.506 (3) | C4—H3 | 0.9300 |
C10—C8i | 1.385 (3) | C3—H2 | 0.9300 |
C10—H9 | 0.9300 | O1W—H1W | 0.89 (3) |
C8—C10i | 1.385 (3) | O1W—H2W | 0.93 (3) |
| | | |
C7—N2—C6 | 123.57 (18) | N2—C6—C2 | 113.43 (17) |
C7—N2—H7 | 118.9 (16) | N2—C6—H6 | 108.9 |
C6—N2—H7 | 117.2 (16) | C2—C6—H6 | 108.9 |
C10—C9—C8 | 120.29 (18) | N2—C6—H5 | 108.9 |
C10—C9—H8 | 119.9 | C2—C6—H5 | 108.9 |
C8—C9—H8 | 119.9 | H6—C6—H5 | 107.7 |
C1—C2—C3 | 117.1 (2) | N1—C1—C2 | 124.4 (2) |
C1—C2—C6 | 120.15 (18) | N1—C1—H1 | 117.8 |
C3—C2—C6 | 122.78 (19) | C2—C1—H1 | 117.8 |
C9—C10—C8i | 120.68 (19) | N1—C5—C4 | 123.3 (2) |
C9—C10—H9 | 119.7 | N1—C5—H4 | 118.4 |
C8i—C10—H9 | 119.7 | C4—C5—H4 | 118.4 |
C10i—C8—C9 | 119.02 (18) | C5—C4—C3 | 119.0 (2) |
C10i—C8—C7 | 118.77 (17) | C5—C4—H3 | 120.5 |
C9—C8—C7 | 122.18 (17) | C3—C4—H3 | 120.5 |
O1—C7—N2 | 123.06 (19) | C4—C3—C2 | 119.5 (2) |
O1—C7—C8 | 120.09 (18) | C4—C3—H2 | 120.3 |
N2—C7—C8 | 116.85 (17) | C2—C3—H2 | 120.3 |
C5—N1—C1 | 116.7 (2) | H1W—O1W—H2W | 109 (2) |
Symmetry code: (i) −x+1, −y+1, −z+1. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H7···O1Wii | 0.84 (3) | 2.01 (3) | 2.817 (3) | 161 (2) |
O1W—H1W···O1iii | 0.89 (3) | 1.95 (3) | 2.837 (2) | 176 (3) |
O1W—H2W···N1iv | 0.93 (3) | 1.88 (3) | 2.809 (3) | 179 (3) |
Symmetry codes: (ii) −x+1/2, y+1/2, −z+1/2; (iii) −x, −y+1, −z+1; (iv) x, y−1, z. |