organic compounds
Cytenamide–1,4-dioxane (2/1)
aSolid-State Research Group, Strathclyde Institute of Pharmacy and Biomedical Sciences, The John Arbuthnott Building, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, Scotland, bUniversity of Göttingen, GZG, Department of Crystallography, Goldschmidtstrasse 1, D-37077 Göttingen, Germany, cISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, England, and dUniversity College London, Department of Chemistry, 20 Gordon Street, London WC1H 0AJ, England
*Correspondence e-mail: alastair.florence@strath.ac.uk
In the H-dibenzo[a,d]cycloheptatriene-5-carboxamide–1,4-dioxane (2/1)], 2C16H13NO·C4H8O2, the cytenamide molecules form a hydrogen-bonded R22(8) dimer. The solvent molecule is located between two adjacent cytenamide dimers and forms N—H⋯O hydrogen bonds with one cytenamide molecule from each dimer.
of the title compound [systematic name: 5Related literature
For details on experimental methods used to obtain this form, see: Davis et al. (1964); Florence et al. (2003); Florence, Johnston, Fernandes et al. (2006). For related literature on cytenamide, see: Florence, Bedford et al. (2008). For literature on related molecules, see: Cyr et al. (1987); Fleischman et al. (2003); Florence, Johnston, Price et al. (2006); Florence, Leech et al. (2006); Bandoli et al. (1992); Harrison et al. (2006); Leech et al. (2007); Florence, Shankland et al. (2008). For other related literature, see: Etter (1990).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2007); cell CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED and SORTAV (Blessing, 1997); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: PLATON (Spek, 2003).
Supporting information
10.1107/S1600536808018709/tk2275sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808018709/tk2275Isup2.hkl
A sample of cytenamide was synthesized according to a modification of the published method (Davis et al., 1964). A single crystal of (I) was grown from a
of cytenamide in 1,4-dioxane by isothermal solvent evaporation at 298 K.Data were merged with SORTAV (Blessing, 1997) and a theta cut off of 25.0 ° was applied due to weak scattering. H-atoms were found on a difference Fourier map and were initially refined with soft restraints on the bond lengths and angles to regularize their geometry. The C-H distances are in the range 0.92 - 0.98 Å and Uiso(H) = 1.2-1.5Ueq(C). Atoms C12 C13 C14 and to some extent C15 suffer from large and prolate thermal ellipsoids. During
the crystal was found to be twinned, according to the expressed by the following matrix: 1 0 0.012, 0 - 1 0, 0 0 - 1 i.e. approximately about the a axis, giving rise to a twin component of ca 10%. Inclusion of the twin resulted in a reduction of the R-factor by ca 1%.Data collection: CrysAlis CCD (Oxford Diffraction, 2007); cell
CrysAlis RED (Oxford Diffraction, 2007); data reduction: CrysAlis RED (Oxford Diffraction, 2007); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: PLATON (Spek, 2003).2C16H13NO·C4H8O2 | F(000) = 1184 |
Mr = 558.68 | Dx = 1.302 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4484 reflections |
a = 24.0888 (7) Å | θ = 3–27° |
b = 5.6066 (2) Å | µ = 0.09 mm−1 |
c = 21.1050 (6) Å | T = 160 K |
β = 90.313 (3)° | Plate, colourless |
V = 2850.32 (15) Å3 | 0.48 × 0.09 × 0.03 mm |
Z = 4 |
Area diffractometer | 5125 independent reflections |
Graphite monochromator | 3677 reflections with I > 2σ(I) |
Detector resolution: 15.9745 pixels mm-1 | Rint = 0.057 |
ω scans | θmax = 25.2°, θmin = 2.6° |
Absorption correction: multi-scan (ABSPACK; Oxford Diffraction, 2007) | h = −28→28 |
Tmin = 0.84, Tmax = 1.00 | k = 0→6 |
23004 measured reflections | l = 0→25 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.068 | H-atom parameters constrained |
wR(F2) = 0.121 | Method = Modified Sheldrick w = 1/[σ2(F2) + (0.03P)2 + 2.31P], where P = [max(Fo2,0) + 2Fc2]/3 |
S = 1.08 | (Δ/σ)max < 0.001 |
5125 reflections | Δρmax = 0.47 e Å−3 |
380 parameters | Δρmin = −0.42 e Å−3 |
0 restraints |
2C16H13NO·C4H8O2 | V = 2850.32 (15) Å3 |
Mr = 558.68 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 24.0888 (7) Å | µ = 0.09 mm−1 |
b = 5.6066 (2) Å | T = 160 K |
c = 21.1050 (6) Å | 0.48 × 0.09 × 0.03 mm |
β = 90.313 (3)° |
Area diffractometer | 5125 independent reflections |
Absorption correction: multi-scan (ABSPACK; Oxford Diffraction, 2007) | 3677 reflections with I > 2σ(I) |
Tmin = 0.84, Tmax = 1.00 | Rint = 0.057 |
23004 measured reflections |
R[F2 > 2σ(F2)] = 0.068 | 0 restraints |
wR(F2) = 0.121 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.47 e Å−3 |
5125 reflections | Δρmin = −0.42 e Å−3 |
380 parameters |
x | y | z | Uiso*/Ueq | ||
C1 | 0.30658 (11) | 0.7244 (5) | 0.22235 (12) | 0.0230 | |
C2 | 0.34609 (11) | 0.5089 (5) | 0.22501 (12) | 0.0212 | |
C3 | 0.38005 (11) | 0.4805 (5) | 0.16566 (12) | 0.0223 | |
C4 | 0.36884 (12) | 0.2923 (5) | 0.12509 (12) | 0.0258 | |
C5 | 0.39561 (13) | 0.2692 (6) | 0.06774 (13) | 0.0325 | |
C6 | 0.43397 (12) | 0.4386 (6) | 0.04947 (14) | 0.0345 | |
C7 | 0.44599 (12) | 0.6265 (6) | 0.08979 (13) | 0.0319 | |
C8 | 0.42064 (11) | 0.6495 (5) | 0.14882 (12) | 0.0236 | |
C9 | 0.43795 (11) | 0.8470 (5) | 0.18941 (13) | 0.0273 | |
C10 | 0.43627 (11) | 0.8646 (5) | 0.25275 (13) | 0.0278 | |
C11 | 0.41740 (11) | 0.6923 (5) | 0.29951 (12) | 0.0248 | |
C12 | 0.43986 (12) | 0.7061 (6) | 0.36058 (13) | 0.0312 | |
C13 | 0.42709 (13) | 0.5401 (6) | 0.40640 (14) | 0.0363 | |
C14 | 0.39126 (14) | 0.3563 (6) | 0.39233 (13) | 0.0362 | |
C15 | 0.36716 (12) | 0.3447 (5) | 0.33299 (13) | 0.0291 | |
C16 | 0.37863 (11) | 0.5125 (5) | 0.28643 (12) | 0.0225 | |
C17 | 0.19387 (11) | 0.2237 (5) | 0.72423 (12) | 0.0211 | |
C18 | 0.15359 (11) | 0.0105 (5) | 0.72796 (11) | 0.0217 | |
C19 | 0.11962 (11) | 0.0120 (5) | 0.78837 (12) | 0.0227 | |
C20 | 0.13026 (12) | −0.1573 (5) | 0.83494 (12) | 0.0281 | |
C21 | 0.10561 (13) | −0.1443 (6) | 0.89365 (13) | 0.0342 | |
C22 | 0.07002 (13) | 0.0420 (6) | 0.90707 (14) | 0.0361 | |
C23 | 0.05789 (12) | 0.2069 (6) | 0.86079 (13) | 0.0305 | |
C24 | 0.08117 (11) | 0.1940 (5) | 0.80018 (12) | 0.0241 | |
C25 | 0.06348 (11) | 0.3688 (5) | 0.75313 (13) | 0.0270 | |
C26 | 0.06267 (11) | 0.3504 (5) | 0.68996 (13) | 0.0277 | |
C27 | 0.08061 (11) | 0.1544 (5) | 0.64959 (12) | 0.0235 | |
C28 | 0.05571 (11) | 0.1337 (6) | 0.58956 (13) | 0.0301 | |
C29 | 0.06815 (12) | −0.0532 (6) | 0.54957 (13) | 0.0341 | |
C30 | 0.10567 (12) | −0.2249 (6) | 0.56844 (13) | 0.0300 | |
C31 | 0.13153 (12) | −0.2035 (5) | 0.62664 (12) | 0.0262 | |
C32 | 0.12027 (11) | −0.0156 (5) | 0.66747 (12) | 0.0221 | |
C33 | 0.24356 (17) | 1.1206 (7) | 0.52906 (16) | 0.0547 | |
C34 | 0.20870 (16) | 1.1411 (8) | 0.47152 (17) | 0.0612 | |
C35 | 0.26150 (18) | 0.8437 (9) | 0.42284 (16) | 0.0654 | |
C36 | 0.29643 (16) | 0.8250 (8) | 0.47959 (16) | 0.0576 | |
O2 | 0.20878 (8) | 0.3034 (4) | 0.67272 (9) | 0.0319 | |
O1 | 0.29456 (9) | 0.8317 (4) | 0.27135 (9) | 0.0416 | |
N1 | 0.28447 (10) | 0.7810 (4) | 0.16701 (10) | 0.0276 | |
O4 | 0.26727 (11) | 0.8892 (5) | 0.53470 (11) | 0.0601 | |
N2 | 0.21372 (10) | 0.3049 (4) | 0.77846 (10) | 0.0301 | |
O3 | 0.23813 (13) | 1.0729 (6) | 0.41616 (11) | 0.0766 | |
H12 | 0.2929 | 0.7005 | 0.1331 | 0.0337* | |
H13 | 0.2388 | 0.4167 | 0.7778 | 0.0346* | |
H14 | 0.2014 | 0.2492 | 0.8143 | 0.0341* | |
H11 | 0.2604 | 0.8928 | 0.1658 | 0.0335* | |
H21 | 0.3220 | 0.3680 | 0.2272 | 0.0227* | |
H41 | 0.3422 | 0.1772 | 0.1371 | 0.0304* | |
H51 | 0.3877 | 0.1358 | 0.0418 | 0.0373* | |
H61 | 0.4516 | 0.4256 | 0.0100 | 0.0391* | |
H71 | 0.4724 | 0.7421 | 0.0774 | 0.0366* | |
H91 | 0.4521 | 0.9769 | 0.1669 | 0.0320* | |
H101 | 0.4495 | 1.0070 | 0.2695 | 0.0308* | |
H121 | 0.4646 | 0.8312 | 0.3704 | 0.0366* | |
H131 | 0.4420 | 0.5553 | 0.4466 | 0.0428* | |
H141 | 0.3833 | 0.2408 | 0.4229 | 0.0431* | |
H151 | 0.3430 | 0.2207 | 0.3235 | 0.0324* | |
H181 | 0.1771 | −0.1295 | 0.7304 | 0.0252* | |
H201 | 0.1550 | −0.2818 | 0.8256 | 0.0321* | |
H211 | 0.1138 | −0.2613 | 0.9244 | 0.0401* | |
H221 | 0.0540 | 0.0580 | 0.9478 | 0.0424* | |
H231 | 0.0330 | 0.3320 | 0.8699 | 0.0339* | |
H251 | 0.0491 | 0.5142 | 0.7700 | 0.0313* | |
H261 | 0.0473 | 0.4794 | 0.6683 | 0.0327* | |
H281 | 0.0308 | 0.2494 | 0.5766 | 0.0346* | |
H291 | 0.0505 | −0.0629 | 0.5088 | 0.0391* | |
H301 | 0.1144 | −0.3536 | 0.5422 | 0.0347* | |
H311 | 0.1579 | −0.3182 | 0.6393 | 0.0303* | |
H331 | 0.2732 | 1.2396 | 0.5258 | 0.0635* | |
H332 | 0.2202 | 1.1544 | 0.5657 | 0.0653* | |
H341 | 0.1959 | 1.3056 | 0.4670 | 0.0711* | |
H342 | 0.1775 | 1.0333 | 0.4757 | 0.0712* | |
H351 | 0.2822 | 0.8002 | 0.3857 | 0.0752* | |
H352 | 0.2310 | 0.7296 | 0.4268 | 0.0756* | |
H361 | 0.3290 | 0.9332 | 0.4750 | 0.0676* | |
H362 | 0.3100 | 0.6606 | 0.4851 | 0.0684* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0193 (15) | 0.0282 (17) | 0.0216 (15) | −0.0031 (12) | 0.0011 (12) | −0.0002 (13) |
C2 | 0.0250 (16) | 0.0174 (14) | 0.0214 (14) | −0.0029 (12) | 0.0021 (11) | 0.0015 (12) |
C3 | 0.0228 (16) | 0.0243 (16) | 0.0199 (14) | 0.0055 (12) | −0.0029 (11) | 0.0048 (12) |
C4 | 0.0286 (17) | 0.0256 (16) | 0.0232 (15) | 0.0019 (13) | −0.0001 (12) | 0.0003 (13) |
C5 | 0.0371 (19) | 0.0352 (19) | 0.0250 (16) | 0.0071 (15) | −0.0039 (13) | −0.0070 (14) |
C6 | 0.0273 (17) | 0.055 (2) | 0.0216 (15) | 0.0101 (16) | 0.0024 (12) | −0.0003 (15) |
C7 | 0.0238 (16) | 0.043 (2) | 0.0288 (16) | −0.0002 (14) | 0.0043 (13) | 0.0074 (15) |
C8 | 0.0194 (15) | 0.0283 (17) | 0.0232 (15) | 0.0031 (13) | −0.0003 (11) | 0.0045 (13) |
C9 | 0.0250 (16) | 0.0251 (17) | 0.0317 (17) | −0.0027 (13) | 0.0000 (12) | 0.0041 (14) |
C10 | 0.0270 (16) | 0.0234 (17) | 0.0330 (17) | −0.0035 (13) | −0.0029 (13) | −0.0060 (14) |
C11 | 0.0219 (15) | 0.0273 (17) | 0.0251 (15) | 0.0055 (13) | 0.0005 (12) | −0.0048 (13) |
C12 | 0.0288 (17) | 0.0322 (18) | 0.0325 (17) | 0.0017 (14) | −0.0046 (13) | −0.0073 (15) |
C13 | 0.0364 (19) | 0.048 (2) | 0.0246 (16) | 0.0080 (16) | −0.0066 (13) | −0.0019 (16) |
C14 | 0.049 (2) | 0.039 (2) | 0.0212 (16) | 0.0063 (16) | −0.0025 (14) | 0.0051 (14) |
C15 | 0.0314 (17) | 0.0287 (18) | 0.0274 (16) | −0.0003 (14) | 0.0018 (12) | −0.0007 (14) |
C16 | 0.0264 (16) | 0.0234 (16) | 0.0178 (14) | 0.0052 (13) | 0.0015 (11) | −0.0037 (12) |
C17 | 0.0189 (15) | 0.0242 (16) | 0.0203 (15) | 0.0013 (12) | −0.0009 (11) | −0.0041 (13) |
C18 | 0.0228 (15) | 0.0232 (16) | 0.0190 (14) | 0.0038 (12) | −0.0011 (11) | 0.0007 (12) |
C19 | 0.0216 (15) | 0.0259 (16) | 0.0207 (14) | −0.0044 (12) | −0.0013 (11) | −0.0032 (13) |
C20 | 0.0337 (17) | 0.0283 (17) | 0.0224 (15) | 0.0004 (14) | −0.0002 (12) | 0.0015 (14) |
C21 | 0.0423 (19) | 0.040 (2) | 0.0199 (15) | −0.0100 (16) | 0.0002 (13) | 0.0071 (14) |
C22 | 0.0344 (18) | 0.049 (2) | 0.0244 (16) | −0.0085 (16) | 0.0078 (13) | −0.0044 (16) |
C23 | 0.0261 (17) | 0.0343 (18) | 0.0313 (17) | −0.0009 (14) | 0.0046 (13) | −0.0086 (15) |
C24 | 0.0242 (16) | 0.0266 (16) | 0.0215 (15) | −0.0038 (13) | 0.0022 (12) | −0.0040 (13) |
C25 | 0.0235 (16) | 0.0228 (16) | 0.0347 (17) | −0.0001 (12) | 0.0048 (12) | −0.0026 (14) |
C26 | 0.0268 (16) | 0.0253 (17) | 0.0310 (17) | 0.0042 (13) | −0.0026 (13) | 0.0048 (14) |
C27 | 0.0221 (15) | 0.0254 (17) | 0.0231 (15) | −0.0036 (13) | 0.0001 (11) | 0.0018 (13) |
C28 | 0.0227 (16) | 0.0399 (19) | 0.0277 (16) | −0.0010 (14) | −0.0035 (12) | 0.0099 (15) |
C29 | 0.0321 (18) | 0.049 (2) | 0.0207 (15) | −0.0079 (16) | −0.0020 (13) | −0.0008 (15) |
C30 | 0.0341 (18) | 0.0319 (18) | 0.0241 (15) | −0.0064 (14) | 0.0025 (13) | −0.0048 (13) |
C31 | 0.0289 (17) | 0.0266 (16) | 0.0231 (15) | −0.0003 (13) | −0.0010 (12) | 0.0017 (13) |
C32 | 0.0195 (15) | 0.0243 (16) | 0.0225 (15) | −0.0037 (12) | 0.0033 (11) | 0.0039 (13) |
C33 | 0.072 (3) | 0.060 (3) | 0.0321 (19) | −0.001 (2) | −0.0018 (18) | −0.0009 (19) |
C34 | 0.059 (3) | 0.075 (3) | 0.049 (2) | −0.005 (2) | −0.0066 (19) | 0.007 (2) |
C35 | 0.069 (3) | 0.097 (4) | 0.031 (2) | 0.008 (3) | −0.0032 (18) | −0.009 (2) |
C36 | 0.057 (3) | 0.070 (3) | 0.046 (2) | −0.009 (2) | 0.0046 (18) | 0.002 (2) |
O2 | 0.0365 (13) | 0.0357 (12) | 0.0235 (11) | −0.0099 (10) | 0.0011 (9) | 0.0034 (10) |
O1 | 0.0443 (14) | 0.0513 (15) | 0.0292 (12) | 0.0234 (12) | −0.0061 (10) | −0.0082 (11) |
N1 | 0.0272 (14) | 0.0302 (14) | 0.0256 (13) | 0.0092 (11) | −0.0009 (10) | −0.0014 (11) |
O4 | 0.0769 (19) | 0.073 (2) | 0.0303 (13) | 0.0053 (16) | −0.0001 (12) | 0.0113 (13) |
N2 | 0.0307 (14) | 0.0366 (15) | 0.0231 (13) | −0.0155 (12) | 0.0048 (10) | −0.0024 (11) |
O3 | 0.088 (2) | 0.109 (3) | 0.0327 (15) | 0.010 (2) | −0.0051 (14) | 0.0206 (16) |
C1—C2 | 1.539 (4) | C20—H201 | 0.940 |
C1—O1 | 1.232 (3) | C21—C22 | 1.382 (4) |
C1—N1 | 1.320 (3) | C21—H211 | 0.944 |
C2—C3 | 1.508 (4) | C22—C23 | 1.375 (4) |
C2—C16 | 1.511 (4) | C22—H221 | 0.948 |
C2—H21 | 0.981 | C23—C24 | 1.401 (4) |
C3—C4 | 1.385 (4) | C23—H231 | 0.944 |
C3—C8 | 1.408 (4) | C24—C25 | 1.457 (4) |
C4—C5 | 1.381 (4) | C25—C26 | 1.337 (4) |
C4—H41 | 0.946 | C25—H251 | 0.955 |
C5—C6 | 1.382 (4) | C26—C27 | 1.457 (4) |
C5—H51 | 0.945 | C26—H261 | 0.932 |
C6—C7 | 1.384 (4) | C27—C28 | 1.404 (4) |
C6—H61 | 0.940 | C27—C32 | 1.400 (4) |
C7—C8 | 1.397 (4) | C28—C29 | 1.379 (4) |
C7—H71 | 0.946 | C28—H281 | 0.924 |
C8—C9 | 1.460 (4) | C29—C30 | 1.378 (4) |
C9—C10 | 1.341 (4) | C29—H291 | 0.959 |
C9—H91 | 0.935 | C30—C31 | 1.379 (4) |
C10—C11 | 1.456 (4) | C30—H301 | 0.934 |
C10—H101 | 0.929 | C31—C32 | 1.389 (4) |
C11—C12 | 1.397 (4) | C31—H311 | 0.942 |
C11—C16 | 1.400 (4) | C33—C34 | 1.477 (5) |
C12—C13 | 1.378 (4) | C33—O4 | 1.423 (4) |
C12—H121 | 0.943 | C33—H331 | 0.980 |
C13—C14 | 1.376 (4) | C33—H332 | 0.977 |
C13—H131 | 0.924 | C34—O3 | 1.422 (4) |
C14—C15 | 1.379 (4) | C34—H341 | 0.976 |
C14—H141 | 0.934 | C34—H342 | 0.969 |
C15—C16 | 1.389 (4) | C35—C36 | 1.464 (5) |
C15—H151 | 0.928 | C35—O3 | 1.410 (5) |
C17—C18 | 1.542 (4) | C35—H351 | 0.963 |
C17—O2 | 1.231 (3) | C35—H352 | 0.979 |
C17—N2 | 1.319 (3) | C36—O4 | 1.409 (4) |
C18—C19 | 1.519 (4) | C36—H361 | 0.997 |
C18—C32 | 1.511 (3) | C36—H362 | 0.984 |
C18—H181 | 0.969 | N1—H12 | 0.871 |
C19—C20 | 1.389 (4) | N1—H11 | 0.855 |
C19—C24 | 1.401 (4) | N2—H13 | 0.870 |
C20—C21 | 1.379 (4) | N2—H14 | 0.873 |
C2—C1—O1 | 120.0 (2) | C20—C21—H211 | 119.5 |
C2—C1—N1 | 117.9 (2) | C22—C21—H211 | 120.8 |
O1—C1—N1 | 122.0 (3) | C21—C22—C23 | 119.5 (3) |
C1—C2—C3 | 113.0 (2) | C21—C22—H221 | 120.9 |
C1—C2—C16 | 109.8 (2) | C23—C22—H221 | 119.6 |
C3—C2—C16 | 115.6 (2) | C22—C23—C24 | 122.0 (3) |
C1—C2—H21 | 105.5 | C22—C23—H231 | 119.2 |
C3—C2—H21 | 106.1 | C24—C23—H231 | 118.9 |
C16—C2—H21 | 106.0 | C19—C24—C23 | 117.9 (3) |
C2—C3—C4 | 119.3 (3) | C19—C24—C25 | 124.0 (2) |
C2—C3—C8 | 121.3 (2) | C23—C24—C25 | 118.0 (3) |
C4—C3—C8 | 119.3 (2) | C24—C25—C26 | 129.0 (3) |
C3—C4—C5 | 121.5 (3) | C24—C25—H251 | 115.1 |
C3—C4—H41 | 119.0 | C26—C25—H251 | 115.8 |
C5—C4—H41 | 119.5 | C25—C26—C27 | 129.7 (3) |
C4—C5—C6 | 119.8 (3) | C25—C26—H261 | 115.7 |
C4—C5—H51 | 119.2 | C27—C26—H261 | 114.6 |
C6—C5—H51 | 121.0 | C26—C27—C28 | 117.6 (3) |
C5—C6—C7 | 119.3 (3) | C26—C27—C32 | 124.0 (2) |
C5—C6—H61 | 120.0 | C28—C27—C32 | 118.3 (3) |
C7—C6—H61 | 120.7 | C27—C28—C29 | 121.5 (3) |
C6—C7—C8 | 121.9 (3) | C27—C28—H281 | 118.9 |
C6—C7—H71 | 119.4 | C29—C28—H281 | 119.7 |
C8—C7—H71 | 118.8 | C28—C29—C30 | 119.9 (3) |
C3—C8—C7 | 118.1 (3) | C28—C29—H291 | 119.7 |
C3—C8—C9 | 124.0 (2) | C30—C29—H291 | 120.4 |
C7—C8—C9 | 118.0 (3) | C29—C30—C31 | 119.3 (3) |
C8—C9—C10 | 129.1 (3) | C29—C30—H301 | 121.2 |
C8—C9—H91 | 113.3 | C31—C30—H301 | 119.6 |
C10—C9—H91 | 117.6 | C30—C31—C32 | 122.0 (3) |
C9—C10—C11 | 129.7 (3) | C30—C31—H311 | 119.5 |
C9—C10—H101 | 115.4 | C32—C31—H311 | 118.5 |
C11—C10—H101 | 114.9 | C18—C32—C27 | 121.4 (2) |
C10—C11—C12 | 117.9 (3) | C18—C32—C31 | 119.5 (2) |
C10—C11—C16 | 123.7 (2) | C27—C32—C31 | 119.0 (2) |
C12—C11—C16 | 118.4 (3) | C34—C33—O4 | 111.5 (3) |
C11—C12—C13 | 121.5 (3) | C34—C33—H331 | 107.5 |
C11—C12—H121 | 119.0 | O4—C33—H331 | 109.5 |
C13—C12—H121 | 119.4 | C34—C33—H332 | 107.9 |
C12—C13—C14 | 119.8 (3) | O4—C33—H332 | 110.1 |
C12—C13—H131 | 119.7 | H331—C33—H332 | 110.3 |
C14—C13—H131 | 120.5 | C33—C34—O3 | 111.8 (3) |
C13—C14—C15 | 119.5 (3) | C33—C34—H341 | 109.3 |
C13—C14—H141 | 120.1 | O3—C34—H341 | 109.4 |
C15—C14—H141 | 120.4 | C33—C34—H342 | 108.3 |
C14—C15—C16 | 121.7 (3) | O3—C34—H342 | 107.3 |
C14—C15—H151 | 119.5 | H341—C34—H342 | 110.8 |
C16—C15—H151 | 118.8 | C36—C35—O3 | 112.0 (3) |
C2—C16—C11 | 121.4 (2) | C36—C35—H351 | 110.5 |
C2—C16—C15 | 119.6 (3) | O3—C35—H351 | 111.0 |
C11—C16—C15 | 118.9 (2) | C36—C35—H352 | 108.2 |
C18—C17—O2 | 120.9 (2) | O3—C35—H352 | 107.7 |
C18—C17—N2 | 116.7 (2) | H351—C35—H352 | 107.2 |
O2—C17—N2 | 122.3 (3) | C35—C36—O4 | 111.7 (3) |
C17—C18—C19 | 112.4 (2) | C35—C36—H361 | 109.1 |
C17—C18—C32 | 111.3 (2) | O4—C36—H361 | 108.7 |
C19—C18—C32 | 115.1 (2) | C35—C36—H362 | 110.6 |
C17—C18—H181 | 105.2 | O4—C36—H362 | 108.0 |
C19—C18—H181 | 106.1 | H361—C36—H362 | 108.7 |
C32—C18—H181 | 105.9 | C1—N1—H12 | 120.5 |
C18—C19—C20 | 119.5 (3) | C1—N1—H11 | 118.2 |
C18—C19—C24 | 120.9 (2) | H12—N1—H11 | 121.2 |
C20—C19—C24 | 119.4 (2) | C33—O4—C36 | 111.5 (3) |
C19—C20—C21 | 121.4 (3) | C17—N2—H13 | 118.9 |
C19—C20—H201 | 118.2 | C17—N2—H14 | 120.4 |
C21—C20—H201 | 120.4 | H13—N2—H14 | 120.7 |
C20—C21—C22 | 119.7 (3) | C34—O3—C35 | 111.3 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H11···O2i | 0.85 | 2.11 | 2.962 (3) | 171 |
N1—H12···O4i | 0.87 | 2.22 | 2.978 (3) | 145 |
N2—H13···O1ii | 0.87 | 1.95 | 2.823 (3) | 177 |
N2—H14···O3ii | 0.87 | 2.53 | 3.040 (3) | 119 |
Symmetry codes: (i) x, −y+3/2, z−1/2; (ii) x, −y+3/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | 2C16H13NO·C4H8O2 |
Mr | 558.68 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 160 |
a, b, c (Å) | 24.0888 (7), 5.6066 (2), 21.1050 (6) |
β (°) | 90.313 (3) |
V (Å3) | 2850.32 (15) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.48 × 0.09 × 0.03 |
Data collection | |
Diffractometer | Area diffractometer |
Absorption correction | Multi-scan (ABSPACK; Oxford Diffraction, 2007) |
Tmin, Tmax | 0.84, 1.00 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 23004, 5125, 3677 |
Rint | 0.057 |
(sin θ/λ)max (Å−1) | 0.599 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.068, 0.121, 1.08 |
No. of reflections | 5125 |
No. of parameters | 380 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.47, −0.42 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2007), CrysAlis RED (Oxford Diffraction, 2007), SIR92 (Altomare et al., 1994), CRYSTALS (Betteridge et al., 2003), ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2006), PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H11···O2i | 0.85 | 2.11 | 2.962 (3) | 171 |
N1—H12···O4i | 0.87 | 2.22 | 2.978 (3) | 145 |
N2—H13···O1ii | 0.87 | 1.95 | 2.823 (3) | 177 |
N2—H14···O3ii | 0.87 | 2.53 | 3.040 (3) | 119 |
Symmetry codes: (i) x, −y+3/2, z−1/2; (ii) x, −y+3/2, z+1/2. |
Acknowledgements
The authors thank the Basic Technology programme of the UK Research Councils for funding this work under the project Control and Prediction of the Organic Solid State (www.cposs.org.uk).
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Cytenamide (CYT) is an analogue of carbamazepine (CBZ), a dibenzazepine drug used to control seizures (Cyr et al., 1987). CYT-dioxane hemisolvate was produced during an automated parallel crystallization study of CYT (Florence, Johnston, Fernandes et al., 2006) as part of a wider investigation that couples automated parallel crystallization with crystal structure prediction methodology to investigate the basic science underlying the solid-state diversity of CBZ (Florence, Johnston, Price et al., 2006; Florence, Leech et al., 2006; Fleischman et al., 2003) and its closely related analogues: CYT (Florence et al., 2008a),10,11-dihydrocarbamazepine (Bandoli et al., 1992; Harrison et al., 2006; Leech et al., 2007) and cyheptamide (Florence, Shankland et al., 2008). The sample was identified as a new form using multi-sample foil transmission X-ray powder diffraction analysis (Florence et al., 2003). Subsequent manual recrystallization from a saturated 1,4-dioxane solution by slow evaporation at 298 K yielded a sample suitable for single-crystal X-ray diffraction (Fig. 1).
The reported crystal structure is essentially isostructural with that of CBZ-dioxane solvate (2/1) (Florence, Johnston, Price et al., 2006) and accordingly displays very similar packing arrangements. Specifically, the molecules crystallize with two CYT and one 1,4-dioxane molecules in the asymmetric unit. Pairs of CYT molecules form an R22(8) dimer motif (Etter, 1990) via two N—H···O hydrogen bonds and a further two N—H···O contacts link CYT dimers with solvent molecules to form an infinite chain that extends in the c-direction (Table 1 & Fig. 2).