organic compounds
rac-3-hydroxy-2-(p-tolyl)-2,3,3a,4,7,7a-hexahydro-1H-4,7-methanoisoindol-1-one
ofaDepartment of Physics, Faculty of Sciences and Arts, University of Kahramanmaras Sutcuimam, Avsar Campus 46100, Kahramanmaras, Turkey, bYalova Community Collage, University of Yalova, 77200 Yalova, Turkey, cScience and Technology Application and Research Center, Dicle University, 21280 Diyarbakır, Turkey, dDepartment of Physics, Faculty of Sciences and Arts, Hitit University, 19030 Çorum, Turkey, and eDepartment of Physics, Bilkent University, 06800 Ankara, Turkey
*Correspondence e-mail: aslantasmehmet@gmail.com
In the title compound, C16H17NO2, the cyclohexene ring adopts a boat conformation, and the five-membered rings have envelope conformations with the bridging atom as the flap. Their mean planes are oriented at a dihedral angle of 86.51 (7)°. The molecular structure is stabilized by a short intramolecular C—H⋯O contact. In the crystal, molecules are linked by O—H⋯O hydrogen bonds forming chains propagating along [100]. The chains are linked by C—H⋯π interactions, forming slabs parallel to (001).
Keywords: crystal structure; methanoisoindol-1-one; methanoisoindole-1,3-dione; O—H⋯O hydrogen bonds; C—H⋯π interactions.
CCDC reference: 1046290
1. Related literature
For medical and pharmaceutical applications of chiral tricyclic compounds, see: Abel et al. (1996); Salvati et al. (2005). For the synthesis of the starting reagent, 2-(p-tolyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione, see: Andrade & Evilazio (2004). For the reduction reaction used to synthesise the title compound, see: Hubert et al. (1975). For the of a similar compound, see: Takebayashi et al. (2010).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: WinGX publication routines (Farrugia, 2012).
Supporting information
CCDC reference: 1046290
10.1107/S2056989015001942/su5074sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S2056989015001942/su5074Isup2.hkl
Supporting information file. DOI: 10.1107/S2056989015001942/su5074Isup3.cml
The starting reagent, 2-(p-tolyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione (L), is a known compound and was prepared from nadic anhydride and 4-toluidine (Andrade & Evilazio, 2004). The title compound was prepared by a reduction reaction following a modification of a literature procedure (Hubert et al., 1975). NaBH4 (0.94 g) was added in small portions at 298 K over a period of 2 h to L (0.72 g, 2.84 mmol) dissolved in ethanol (250 ml). The excess of NaBH4 was consumed in 15 min at 278 K by adding aqueous HCl (2 mol dm-3) until the pH reached 3. The mixture was stirred for an additional 1 h at the same temperature then poured into water and extracted with dichloromethane. The organic layer was separated, dried over Na2SO4, filtered and evaporated to yield a white solid that was purified by silica gel δ(H) 1.38–1.42 (dd, 2H, CH2), 2.24 (s, 3H, CH3), 2.59–2.60 (d, H, CH), 2.61–2.62 (d, H, CH), 3.11–3.13 (m, H, CH), 3.18–3.21 (dd, H, CH), 4.81 (s, H, CH—OH), 6.03–6.05 (dd, H, ═CH), 6.16–6.18 (dd, H, ═CH), 7.09–7.11 (d, 2H, aromatic), 7.25–7.27 (d, 2H, aromatic); δ(C) 20.96 (CH3), 45.08 (CH), 45.62 (CH), 46.56 (CH), 49.58 (CH), 51.06 (CH2), 86.17 (CH—OH), 124.07 (Cm), 129.33 (Co), 134.37 (CH═CH), 134.93 (Cq—N), 135.87 (C—CH3), 174.39 (C═O) p.p.m.. FT—IR (ATR): 3211 (OH), 2972, 2943, 1646 (C═O), 1613 and 1515 (aromatic, C═C), 1422, 1403, 1065 (C—N), 819 cm-1.
[ethyl acetate/n-hexane (3:2 v/v)] which on slow evaporation of the solvent gave colourless crystals (yield: 65%; m.p.: 475–477 K). NMR (DMSO):H atoms attached to bridging atom C16 were located in a difference Fourier map and freely refined. The other H atoms were placed in geometrically idealized positions (C—H = 0.93–0.98 Å and O—H= 0.82 Å) and treated as riding, with Uiso(H) = 1.5Ueq(O,C) for hydroxyl and methyl H atoms and = 1.2Ueq(C) for other H atoms.
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: WinGX publication routines (Farrugia, 2012).Fig. 1. The molecular structure of the title compound, with atom labelling. Displacement ellipsoids are drawn at the 30% probability level. | |
Fig. 2. A partial view along the b axis of the crystal packing of the title compound. Dashed lines indicate the O—H···O hydrogen bonds (see Table 1 for details). |
C16H17NO2 | F(000) = 544 |
Mr = 255.31 | Dx = 1.280 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5019 reflections |
a = 6.5067 (2) Å | θ = 3.6–33.2° |
b = 9.7385 (2) Å | µ = 0.08 mm−1 |
c = 21.0780 (5) Å | T = 296 K |
β = 97.154 (1)° | Prism, colourless |
V = 1325.22 (6) Å3 | 0.45 × 0.25 × 0.15 mm |
Z = 4 |
Bruker APEXII diffractometer | 5019 independent reflections |
Radiation source: fine-focus sealed tube | 3930 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
ϕ and ω scans | θmax = 33.2°, θmin = 3.6° |
Absorption correction: multi-scan (Blessing, 1995) | h = −5→9 |
Tmin = 0.963, Tmax = 0.988 | k = −14→15 |
28760 measured reflections | l = −32→32 |
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)] = 0.063 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.180 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | w = 1/[σ2(Fo2) + (0.0762P)2 + 0.4345P] where P = (Fo2 + 2Fc2)/3 |
5019 reflections | (Δ/σ)max < 0.001 |
180 parameters | Δρmax = 0.40 e Å−3 |
0 restraints | Δρmin = −0.38 e Å−3 |
C16H17NO2 | V = 1325.22 (6) Å3 |
Mr = 255.31 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 6.5067 (2) Å | µ = 0.08 mm−1 |
b = 9.7385 (2) Å | T = 296 K |
c = 21.0780 (5) Å | 0.45 × 0.25 × 0.15 mm |
β = 97.154 (1)° |
Bruker APEXII diffractometer | 5019 independent reflections |
Absorption correction: multi-scan (Blessing, 1995) | 3930 reflections with I > 2σ(I) |
Tmin = 0.963, Tmax = 0.988 | Rint = 0.023 |
28760 measured reflections |
R[F2 > 2σ(F2)] = 0.063 | 0 restraints |
wR(F2) = 0.180 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | Δρmax = 0.40 e Å−3 |
5019 reflections | Δρmin = −0.38 e Å−3 |
180 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.45122 (14) | 1.12217 (12) | 0.27036 (6) | 0.0443 (3) | |
H2 | 0.5256 | 1.0905 | 0.3011 | 0.066* | |
O2 | −0.18121 (15) | 0.99108 (14) | 0.30186 (6) | 0.0498 (3) | |
C16 | −0.0698 (3) | 1.0387 (2) | 0.09543 (8) | 0.0528 (4) | |
C1 | 0.4966 (4) | 0.7713 (3) | 0.53749 (9) | 0.0695 (6) | |
H1A | 0.4064 | 0.7943 | 0.5686 | 0.104* | |
H1B | 0.6307 | 0.8110 | 0.5498 | 0.104* | |
H1C | 0.5094 | 0.6733 | 0.5350 | 0.104* | |
H16A | −0.073 (3) | 1.138 (2) | 0.0867 (10) | 0.057 (6)* | |
H16B | −0.110 (4) | 0.990 (2) | 0.0570 (12) | 0.066 (6)* | |
N1 | 0.16608 (15) | 0.98524 (11) | 0.29178 (5) | 0.0303 (2) | |
C11 | 0.30916 (17) | 1.02207 (13) | 0.24528 (6) | 0.0323 (2) | |
H11 | 0.3825 | 0.9402 | 0.2330 | 0.039* | |
C5 | 0.24201 (17) | 0.92979 (12) | 0.35282 (6) | 0.0303 (2) | |
C8 | −0.03527 (18) | 1.01463 (13) | 0.27142 (7) | 0.0337 (2) | |
C9 | −0.05367 (19) | 1.07927 (14) | 0.20645 (7) | 0.0363 (3) | |
H9 | −0.1068 | 1.1733 | 0.2075 | 0.044* | |
C10 | 0.16740 (19) | 1.07774 (14) | 0.18773 (6) | 0.0351 (3) | |
H10 | 0.2096 | 1.1710 | 0.1777 | 0.042* | |
C6 | 0.4272 (2) | 0.85725 (15) | 0.36000 (7) | 0.0387 (3) | |
H6 | 0.4973 | 0.8419 | 0.3248 | 0.046* | |
C2 | 0.4079 (2) | 0.82658 (16) | 0.47322 (7) | 0.0440 (3) | |
C7 | 0.5078 (2) | 0.80753 (17) | 0.41974 (7) | 0.0455 (3) | |
H7 | 0.6327 | 0.7600 | 0.4239 | 0.055* | |
C12 | −0.1801 (2) | 0.99380 (17) | 0.15201 (8) | 0.0470 (3) | |
H12 | −0.3307 | 1.0066 | 0.1470 | 0.056* | |
C15 | 0.1436 (3) | 0.98780 (17) | 0.12617 (7) | 0.0448 (3) | |
H15 | 0.2563 | 0.9944 | 0.0995 | 0.054* | |
C4 | 0.1392 (2) | 0.94992 (18) | 0.40597 (7) | 0.0459 (3) | |
H4 | 0.0148 | 0.9981 | 0.4021 | 0.055* | |
C13 | −0.1047 (3) | 0.84754 (17) | 0.16019 (8) | 0.0530 (4) | |
H13 | −0.1791 | 0.7734 | 0.1733 | 0.064* | |
C3 | 0.2228 (3) | 0.8979 (2) | 0.46493 (8) | 0.0534 (4) | |
H3 | 0.1517 | 0.9115 | 0.5001 | 0.064* | |
C14 | 0.0870 (3) | 0.84423 (17) | 0.14533 (8) | 0.0520 (4) | |
H14 | 0.1720 | 0.7672 | 0.1465 | 0.062* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0241 (4) | 0.0503 (6) | 0.0575 (6) | −0.0066 (4) | 0.0005 (4) | 0.0026 (5) |
O2 | 0.0203 (4) | 0.0751 (8) | 0.0549 (6) | 0.0010 (4) | 0.0079 (4) | 0.0096 (5) |
C16 | 0.0568 (9) | 0.0558 (9) | 0.0421 (8) | −0.0040 (8) | −0.0091 (7) | 0.0114 (7) |
C1 | 0.0762 (14) | 0.0834 (14) | 0.0453 (9) | −0.0020 (11) | −0.0064 (9) | 0.0202 (9) |
N1 | 0.0193 (4) | 0.0366 (5) | 0.0347 (5) | 0.0025 (3) | 0.0030 (3) | 0.0021 (4) |
C11 | 0.0218 (4) | 0.0375 (6) | 0.0380 (6) | 0.0015 (4) | 0.0058 (4) | 0.0020 (5) |
C5 | 0.0244 (5) | 0.0332 (5) | 0.0328 (5) | 0.0007 (4) | 0.0022 (4) | −0.0013 (4) |
C8 | 0.0204 (4) | 0.0377 (6) | 0.0424 (6) | 0.0021 (4) | 0.0019 (4) | 0.0008 (5) |
C9 | 0.0254 (5) | 0.0377 (6) | 0.0444 (7) | 0.0034 (4) | −0.0011 (4) | 0.0061 (5) |
C10 | 0.0300 (5) | 0.0356 (6) | 0.0395 (6) | −0.0011 (4) | 0.0037 (4) | 0.0071 (5) |
C6 | 0.0287 (5) | 0.0496 (7) | 0.0379 (6) | 0.0092 (5) | 0.0050 (5) | 0.0037 (5) |
C2 | 0.0466 (7) | 0.0473 (8) | 0.0361 (6) | −0.0043 (6) | −0.0026 (5) | 0.0045 (5) |
C7 | 0.0358 (6) | 0.0540 (8) | 0.0450 (7) | 0.0090 (6) | −0.0013 (5) | 0.0087 (6) |
C12 | 0.0351 (6) | 0.0562 (9) | 0.0464 (8) | −0.0055 (6) | −0.0089 (6) | 0.0091 (6) |
C15 | 0.0477 (8) | 0.0496 (8) | 0.0372 (7) | 0.0010 (6) | 0.0063 (6) | 0.0052 (6) |
C4 | 0.0422 (7) | 0.0590 (9) | 0.0377 (7) | 0.0157 (6) | 0.0093 (5) | −0.0018 (6) |
C13 | 0.0641 (10) | 0.0452 (8) | 0.0459 (8) | −0.0178 (7) | −0.0079 (7) | 0.0030 (6) |
C3 | 0.0587 (9) | 0.0672 (10) | 0.0358 (7) | 0.0103 (8) | 0.0121 (6) | −0.0004 (7) |
C14 | 0.0711 (11) | 0.0396 (7) | 0.0436 (8) | 0.0024 (7) | −0.0003 (7) | −0.0026 (6) |
O1—C11 | 1.4008 (16) | C9—C12 | 1.566 (2) |
O1—H2 | 0.8200 | C9—H9 | 0.9800 |
O2—C8 | 1.2320 (16) | C10—C15 | 1.557 (2) |
C16—C12 | 1.531 (2) | C10—H10 | 0.9800 |
C16—C15 | 1.539 (2) | C6—C7 | 1.3893 (19) |
C16—H16A | 0.99 (2) | C6—H6 | 0.9300 |
C16—H16B | 0.95 (2) | C2—C7 | 1.382 (2) |
C1—C2 | 1.505 (2) | C2—C3 | 1.383 (2) |
C1—H1A | 0.9600 | C7—H7 | 0.9300 |
C1—H1B | 0.9600 | C12—C13 | 1.509 (3) |
C1—H1C | 0.9600 | C12—H12 | 0.9800 |
N1—C8 | 1.3574 (14) | C15—C14 | 1.513 (2) |
N1—C5 | 1.4256 (16) | C15—H15 | 0.9800 |
N1—C11 | 1.4776 (15) | C4—C3 | 1.389 (2) |
C11—C10 | 1.5290 (18) | C4—H4 | 0.9300 |
C11—H11 | 0.9800 | C13—C14 | 1.324 (3) |
C5—C4 | 1.3884 (18) | C13—H13 | 0.9300 |
C5—C6 | 1.3885 (17) | C3—H3 | 0.9300 |
C8—C9 | 1.4984 (19) | C14—H14 | 0.9300 |
C9—C10 | 1.5383 (18) | ||
C11—O1—H2 | 109.5 | C11—C10—H10 | 110.0 |
C12—C16—C15 | 93.78 (12) | C9—C10—H10 | 110.0 |
C12—C16—H16A | 115.2 (12) | C15—C10—H10 | 110.0 |
C15—C16—H16A | 113.0 (13) | C5—C6—C7 | 120.04 (13) |
C12—C16—H16B | 114.7 (15) | C5—C6—H6 | 120.0 |
C15—C16—H16B | 109.9 (15) | C7—C6—H6 | 120.0 |
H16A—C16—H16B | 109.4 (19) | C7—C2—C3 | 117.07 (13) |
C2—C1—H1A | 109.5 | C7—C2—C1 | 121.32 (16) |
C2—C1—H1B | 109.5 | C3—C2—C1 | 121.61 (16) |
H1A—C1—H1B | 109.5 | C2—C7—C6 | 121.98 (13) |
C2—C1—H1C | 109.5 | C2—C7—H7 | 119.0 |
H1A—C1—H1C | 109.5 | C6—C7—H7 | 119.0 |
H1B—C1—H1C | 109.5 | C13—C12—C16 | 100.44 (15) |
C8—N1—C5 | 125.28 (10) | C13—C12—C9 | 106.51 (11) |
C8—N1—C11 | 113.71 (10) | C16—C12—C9 | 99.46 (12) |
C5—N1—C11 | 120.96 (9) | C13—C12—H12 | 116.0 |
O1—C11—N1 | 111.06 (11) | C16—C12—H12 | 116.0 |
O1—C11—C10 | 110.93 (11) | C9—C12—H12 | 116.0 |
N1—C11—C10 | 104.17 (9) | C14—C15—C16 | 99.98 (14) |
O1—C11—H11 | 110.2 | C14—C15—C10 | 107.43 (12) |
N1—C11—H11 | 110.2 | C16—C15—C10 | 99.24 (13) |
C10—C11—H11 | 110.2 | C14—C15—H15 | 115.9 |
C4—C5—C6 | 118.85 (12) | C16—C15—H15 | 115.9 |
C4—C5—N1 | 121.80 (11) | C10—C15—H15 | 115.9 |
C6—C5—N1 | 119.32 (11) | C5—C4—C3 | 119.75 (14) |
O2—C8—N1 | 124.90 (13) | C5—C4—H4 | 120.1 |
O2—C8—C9 | 125.12 (11) | C3—C4—H4 | 120.1 |
N1—C8—C9 | 109.98 (11) | C14—C13—C12 | 107.37 (14) |
C8—C9—C10 | 105.05 (10) | C14—C13—H13 | 126.3 |
C8—C9—C12 | 114.92 (11) | C12—C13—H13 | 126.3 |
C10—C9—C12 | 103.28 (12) | C2—C3—C4 | 122.30 (14) |
C8—C9—H9 | 111.0 | C2—C3—H3 | 118.9 |
C10—C9—H9 | 111.0 | C4—C3—H3 | 118.9 |
C12—C9—H9 | 111.0 | C13—C14—C15 | 107.95 (15) |
C11—C10—C9 | 106.91 (10) | C13—C14—H14 | 126.0 |
C11—C10—C15 | 116.70 (11) | C15—C14—H14 | 126.0 |
C9—C10—C15 | 102.71 (11) | ||
C8—N1—C11—O1 | 117.43 (12) | C3—C2—C7—C6 | −0.1 (3) |
C5—N1—C11—O1 | −60.01 (14) | C1—C2—C7—C6 | 179.60 (17) |
C8—N1—C11—C10 | −2.04 (14) | C5—C6—C7—C2 | 0.7 (2) |
C5—N1—C11—C10 | −179.48 (11) | C15—C16—C12—C13 | −50.25 (14) |
C8—N1—C5—C4 | −26.3 (2) | C15—C16—C12—C9 | 58.64 (14) |
C11—N1—C5—C4 | 150.86 (14) | C8—C9—C12—C13 | −45.60 (17) |
C8—N1—C5—C6 | 155.78 (13) | C10—C9—C12—C13 | 68.21 (15) |
C11—N1—C5—C6 | −27.09 (17) | C8—C9—C12—C16 | −149.55 (12) |
C5—N1—C8—O2 | −3.7 (2) | C10—C9—C12—C16 | −35.73 (14) |
C11—N1—C8—O2 | 178.96 (13) | C12—C16—C15—C14 | 49.62 (15) |
C5—N1—C8—C9 | 176.52 (11) | C12—C16—C15—C10 | −60.06 (14) |
C11—N1—C8—C9 | −0.79 (15) | C11—C10—C15—C14 | 51.45 (17) |
O2—C8—C9—C10 | −176.50 (14) | C9—C10—C15—C14 | −65.11 (15) |
N1—C8—C9—C10 | 3.26 (15) | C11—C10—C15—C16 | 155.05 (12) |
O2—C8—C9—C12 | −63.72 (19) | C9—C10—C15—C16 | 38.49 (13) |
N1—C8—C9—C12 | 116.04 (13) | C6—C5—C4—C3 | 0.1 (2) |
O1—C11—C10—C9 | −115.65 (11) | N1—C5—C4—C3 | −177.82 (15) |
N1—C11—C10—C9 | 3.91 (13) | C16—C12—C13—C14 | 33.93 (16) |
O1—C11—C10—C15 | 130.13 (12) | C9—C12—C13—C14 | −69.31 (17) |
N1—C11—C10—C15 | −110.31 (12) | C7—C2—C3—C4 | −0.6 (3) |
C8—C9—C10—C11 | −4.38 (14) | C1—C2—C3—C4 | 179.80 (19) |
C12—C9—C10—C11 | −125.16 (11) | C5—C4—C3—C2 | 0.5 (3) |
C8—C9—C10—C15 | 118.98 (12) | C12—C13—C14—C15 | −0.61 (18) |
C12—C9—C10—C15 | −1.79 (13) | C16—C15—C14—C13 | −32.66 (17) |
C4—C5—C6—C7 | −0.7 (2) | C10—C15—C14—C13 | 70.41 (17) |
N1—C5—C6—C7 | 177.28 (13) |
Cg1 and Cg4 are the centroids of the N1/C8–C11 and C2–C7 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O2 | 0.93 | 2.33 | 2.860 (2) | 116 |
O1—H2···O2i | 0.82 | 2.14 | 2.7194 (15) | 128 |
C13—H13···Cg1ii | 0.93 | 2.94 | 3.6903 (18) | 139 |
C16—H16A···Cg4iii | 0.99 (2) | 2.86 (2) | 3.692 (2) | 143.4 (15) |
Symmetry codes: (i) x+1, y, z; (ii) −x, y−1/2, −z+1/2; (iii) −x, y+1/2, −z+1/2. |
Cg1 and Cg4 are the centroids of the N1/C8–C11 and C2–C7 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O2 | 0.93 | 2.33 | 2.860 (2) | 116 |
O1—H2···O2i | 0.82 | 2.14 | 2.7194 (15) | 128 |
C13—H13···Cg1ii | 0.93 | 2.94 | 3.6903 (18) | 139 |
C16—H16A···Cg4iii | 0.99 (2) | 2.86 (2) | 3.692 (2) | 143.4 (15) |
Symmetry codes: (i) x+1, y, z; (ii) −x, y−1/2, −z+1/2; (iii) −x, y+1/2, −z+1/2. |
Acknowledgements
This research was supported by Yalova University Scientific Research Projects Coordination Department (project No. 210–07). We would also like to thank DUPTAM, Dicle University, Turkey, for the use of the X-ray diffractometer.
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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.
Chiral tricyclic compounds in heterocyclic chemistry are important in medicinal and pharmaceutical fields (Abel et al., 1996; Salvati et al., 2005). We report herein on the synthesis and crystal structure of the title compound, prepared by reduction of 2-(p-tolyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione, using NaBH4.
The bond lengths and angles in the title compound, Fig. 1, are close to those reported for two similar chiral structures (Takebayashi et al., 2010). The cyclohexene ring (C9/C190/C12-C15) has a normal boat conformation [puckering parameters: θ2 = 0.9587 (3) Å and ϕ2 = 169.02 (14)°]. The main bridge angle, C12—C16—C15, which connects the two bridgeheads on the cyclohexene ring, is 93.78 (12) °. The two five-membered rings, A(C9/C10/C15/C16/C12) and B(C12-C16) have envelope conformations with the flap atom C16 deviating from their mean planes by 0.5131 (2) and 0.4027 (2) Å, respectively. The dihedral angle between their mean planes, [A/B], is 86.51 (7)°. The whole molecule is non-planar with the dihedral angle between the benzene (C2-C7) and imide (N1/C8-C11) rings being 26.12 (5)°. This is much smaller than the same dihedral angle of ca.57.22 ° in the 2-phenyl derivative (Takebayashi et al., 2010) or ca. 61.37 ° in the 2-(4-fluorophenyl) derivative (Takebayashi et al., 2010). In the molecule there is a strong C—H···O intra-molecular contact present (Table 1).
In the crystal, molecules are linked by O—H···O hydrogen bonds forming chains along [100]; see Table 1 and Fig. 2. The chains are linked by C-H···π interactions forming slabs parallel to (001); see Table 1.