The title compound, 2 C
2H
8N
+·C
12H
8O
42−, crystallizes as a salt in space group
P2
1/
n, the anion being located on an inversion center. The dimethylammonium cations link neighboring carboxylate anions
via two N
+—H
O hydrogen bonds [H
O = 1.72 (3) and 1.84 (3) Å, N
O = 2.671 (2) and 2.726 (2) Å, and N—H
O = 178 (3) and 173 (2)°] resulting in molecular ribbons.
Supporting information
CCDC reference: 248848
Key indicators
- Single-crystal X-ray study
- T = 148 K
- Mean (C-C) = 0.003 Å
- R factor = 0.053
- wR factor = 0.131
- Data-to-parameter ratio = 14.1
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ .... ?
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd. # 2
C2 H8 N
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
2 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
1 ALERT type 4 Improvement, methodology, query or suggestion
Data collection: SMART (Bruker, 2001); cell refinement: SMART; data reduction: SAINT (Bruker, 2002) and XPREP (Bruker, 2001b); program(s) used to solve structure: SHELXTL (Bruker, 2000); program(s) used to refine structure: SHELXTL; molecular graphics: X-SEED; software used to prepare material for publication: X-SEED (Barbour, 2001).
Bis(dimethylammonium) 1,4-phenylenediacrylate
top
Crystal data top
2C2H8N+·C12H8O42− | F(000) = 332 |
Mr = 308.38 | Dx = 1.195 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 4922 reflections |
a = 5.8270 (7) Å | θ = 2.6–28.3° |
b = 23.980 (3) Å | µ = 0.09 mm−1 |
c = 6.1406 (8) Å | T = 148 K |
β = 92.306 (2)° | Transparent block, colorless |
V = 857.35 (19) Å3 | 0.36 × 0.22 × 0.18 mm |
Z = 2 | |
Data collection top
Bruker SMART 1000 CCD diffractometer | 1556 independent reflections |
Radiation source: fine-focus sealed tube | 1290 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.048 |
φ and ω scans | θmax = 25.3°, θmin = 3.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −6→7 |
Tmin = 0.967, Tmax = 0.985 | k = −28→28 |
5113 measured reflections | l = −7→7 |
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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.12 | w = 1/[σ2(Fo2) + (0.0609P)2 + 0.2787P] where P = (Fo2 + 2Fc2)/3 |
1556 reflections | (Δ/σ)max < 0.001 |
110 parameters | Δρmax = 0.20 e Å−3 |
0 restraints | Δρmin = −0.23 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 | −0.1069 (2) | 0.12814 (7) | 0.5057 (3) | 0.0352 (4) | |
O2 | 0.1810 (2) | 0.16504 (6) | 0.7096 (2) | 0.0268 (4) | |
N1 | −0.3610 (3) | 0.18205 (7) | 0.7907 (3) | 0.0249 (4) | |
C1 | 0.1039 (3) | 0.13281 (8) | 0.5604 (3) | 0.0216 (4) | |
C2 | 0.2721 (3) | 0.09869 (8) | 0.4378 (3) | 0.0224 (4) | |
H2 | 0.4281 | 0.0980 | 0.4891 | 0.027* | |
C3 | 0.2121 (3) | 0.06948 (8) | 0.2609 (3) | 0.0217 (4) | |
H3 | 0.0553 | 0.0717 | 0.2129 | 0.026* | |
C4 | 0.3611 (3) | 0.03402 (7) | 0.1307 (3) | 0.0200 (4) | |
C5 | 0.2867 (3) | 0.01770 (8) | −0.0798 (3) | 0.0217 (4) | |
H5 | 0.1407 | 0.0298 | −0.1357 | 0.026* | |
C6 | 0.4213 (3) | −0.01570 (8) | −0.2085 (3) | 0.0222 (4) | |
H6 | 0.3660 | −0.0262 | −0.3502 | 0.027* | |
C7 | −0.2966 (4) | 0.16024 (11) | 1.0104 (4) | 0.0417 (6) | |
H7A | −0.1299 | 0.1631 | 1.0358 | 0.063* | |
H7B | −0.3432 | 0.1211 | 1.0201 | 0.063* | |
H7C | −0.3741 | 0.1821 | 1.1205 | 0.063* | |
C8 | −0.3124 (4) | 0.24188 (9) | 0.7659 (4) | 0.0379 (6) | |
H8A | −0.4066 | 0.2633 | 0.8646 | 0.057* | |
H8B | −0.3487 | 0.2532 | 0.6151 | 0.057* | |
H8C | −0.1495 | 0.2489 | 0.8015 | 0.057* | |
H1A | −0.508 (5) | 0.1749 (9) | 0.755 (4) | 0.031 (6)* | |
H1B | −0.270 (5) | 0.1621 (11) | 0.692 (4) | 0.051 (8)* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1 | 0.0175 (7) | 0.0478 (10) | 0.0404 (9) | 0.0030 (6) | 0.0011 (6) | −0.0201 (8) |
O2 | 0.0193 (7) | 0.0302 (8) | 0.0311 (8) | 0.0013 (5) | 0.0020 (6) | −0.0094 (7) |
N1 | 0.0164 (8) | 0.0273 (9) | 0.0310 (10) | 0.0002 (7) | 0.0012 (7) | −0.0075 (8) |
C1 | 0.0187 (9) | 0.0241 (10) | 0.0222 (10) | 0.0020 (7) | 0.0022 (7) | −0.0010 (8) |
C2 | 0.0162 (8) | 0.0240 (10) | 0.0272 (11) | 0.0021 (7) | 0.0031 (7) | −0.0018 (8) |
C3 | 0.0164 (8) | 0.0217 (9) | 0.0274 (11) | 0.0004 (7) | 0.0039 (7) | 0.0004 (9) |
C4 | 0.0183 (8) | 0.0175 (9) | 0.0244 (11) | −0.0012 (7) | 0.0047 (7) | 0.0010 (8) |
C5 | 0.0179 (8) | 0.0202 (9) | 0.0270 (11) | 0.0021 (7) | 0.0012 (8) | 0.0004 (8) |
C6 | 0.0215 (9) | 0.0231 (10) | 0.0220 (10) | −0.0002 (7) | 0.0022 (8) | −0.0029 (8) |
C7 | 0.0318 (11) | 0.0521 (15) | 0.0416 (14) | −0.0010 (10) | 0.0057 (10) | 0.0101 (12) |
C8 | 0.0369 (12) | 0.0300 (12) | 0.0465 (15) | 0.0000 (9) | −0.0005 (11) | −0.0028 (11) |
Geometric parameters (Å, º) top
O1—C1 | 1.266 (2) | C4—C6i | 1.407 (3) |
O2—C1 | 1.267 (2) | C5—C6 | 1.390 (3) |
N1—C8 | 1.472 (3) | C5—H5 | 0.9500 |
N1—C7 | 1.481 (3) | C6—C4i | 1.407 (3) |
N1—H1A | 0.89 (3) | C6—H6 | 0.9500 |
N1—H1B | 0.95 (3) | C7—H7A | 0.9800 |
C1—C2 | 1.502 (3) | C7—H7B | 0.9800 |
C2—C3 | 1.328 (3) | C7—H7C | 0.9800 |
C2—H2 | 0.9500 | C8—H8A | 0.9800 |
C3—C4 | 1.474 (3) | C8—H8B | 0.9800 |
C3—H3 | 0.9500 | C8—H8C | 0.9800 |
C4—C5 | 1.402 (3) | | |
| | | |
C8—N1—C7 | 113.31 (18) | C6—C5—C4 | 121.63 (17) |
C8—N1—H1A | 110.4 (14) | C6—C5—H5 | 119.2 |
C7—N1—H1A | 111.1 (15) | C4—C5—H5 | 119.2 |
C8—N1—H1B | 108.1 (17) | C5—C6—C4i | 120.53 (18) |
C7—N1—H1B | 105.9 (16) | C5—C6—H6 | 119.7 |
H1A—N1—H1B | 108 (2) | C4i—C6—H6 | 119.7 |
O1—C1—O2 | 123.94 (17) | N1—C7—H7A | 109.5 |
O1—C1—C2 | 117.68 (17) | N1—C7—H7B | 109.5 |
O2—C1—C2 | 118.37 (15) | H7A—C7—H7B | 109.5 |
C3—C2—C1 | 122.82 (16) | N1—C7—H7C | 109.5 |
C3—C2—H2 | 118.6 | H7A—C7—H7C | 109.5 |
C1—C2—H2 | 118.6 | H7B—C7—H7C | 109.5 |
C2—C3—C4 | 127.37 (16) | N1—C8—H8A | 109.5 |
C2—C3—H3 | 116.3 | N1—C8—H8B | 109.5 |
C4—C3—H3 | 116.3 | H8A—C8—H8B | 109.5 |
C5—C4—C6i | 117.83 (17) | N1—C8—H8C | 109.5 |
C5—C4—C3 | 119.61 (16) | H8A—C8—H8C | 109.5 |
C6i—C4—C3 | 122.56 (18) | H8B—C8—H8C | 109.5 |
| | | |
O1—C1—C2—C3 | 8.1 (3) | C2—C3—C4—C6i | 16.0 (3) |
O2—C1—C2—C3 | −170.85 (18) | C6i—C4—C5—C6 | 0.3 (3) |
C1—C2—C3—C4 | −178.92 (18) | C3—C4—C5—C6 | −179.99 (17) |
C2—C3—C4—C5 | −163.66 (19) | C4—C5—C6—C4i | −0.3 (3) |
Symmetry code: (i) −x+1, −y, −z. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···O1 | 0.95 (3) | 1.72 (3) | 2.671 (2) | 178 (3) |
N1—H1A···O2ii | 0.89 (3) | 1.84 (3) | 2.726 (2) | 173 (2) |
Symmetry code: (ii) x−1, y, z. |