organic compounds
10-Hydroxy-2-azapentacyclo[10.8.0.02,10.04,9.015,20]icosa-1(12),4(9),5,7,13,15(20),16,18-octaene-3,11-dione
aDepartment of Chemistry, Islamic Azad University, Yazd Branch, Yazd, Iran, and bDepartment of Chemistry, Shahid Beheshti University, G. C., Evin, Tehran 1983963113, Iran
*Correspondence e-mail: sa_hashemian@yahoo.com
In the title compound, C19H11NO3, the isoindolinone ring system is approximately planar with a maximum atomic deviation of 0.071 (1) Å and the five-membered ring of the dihydrobenzo[g]indol-3-one unit assumes an The naphthalene ring system makes a dihedral angle of 39.47 (4)° with the mean plane of the isoindolinone system. Intermolecular O—H⋯O and C—H⋯O hydrogen bonding helps to stabilize the crystal structure.
Related literature
For applications of naphthylamines, see Valenti et al. (2006); Black et al. (1994).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: X-RED32 (Stoe & Cie, 2005); cell X-AREA (Stoe & Cie, 2005); data reduction: X-AREA; 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, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536811005356/xu5159sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811005356/xu5159Isup2.hkl
The title compound was prepared by the reaction of α- naphthylamine and ninhydrine in molar ratio of 1: 1 in acetone. The mixture was stirred for about 2 h at room temperature. The resulting solution was kept in air. After slow evaporation, single crystals of the title compound suitable for an X-ray diffraction study formed at the bottom of the vessel after 2 weeks (m.p. 138 °C).
Hydroxyl H atom was found in a difference Fourier map and refined isotropically. Other H atoms were positioned geometrically and refined as riding atoms with C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C).
Data collection: X-RED32 (Stoe & Cie, 2005); cell
X-AREA (Stoe & Cie, 2005); data reduction: X-AREA (Stoe & Cie, 2005); 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, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).C19H11NO3 | Z = 2 |
Mr = 301.29 | F(000) = 312 |
Triclinic, P1 | Dx = 1.463 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.3250 (11) Å | Cell parameters from 1011 reflections |
b = 9.7916 (16) Å | θ = 2.3–25.0° |
c = 10.4532 (17) Å | µ = 0.10 mm−1 |
α = 70.401 (13)° | T = 298 K |
β = 82.503 (13)° | Block, colorless |
γ = 75.862 (12)° | 0.40 × 0.30 × 0.29 mm |
V = 683.94 (19) Å3 |
Stoe IPDS II diffractometer | 3161 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.040 |
Graphite monochromator | θmax = 29.3°, θmin = 2.3° |
rotation method scans | h = −10→10 |
7737 measured reflections | k = −13→13 |
3627 independent reflections | l = −14→14 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.136 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.13 | w = 1/[σ2(Fo2) + (0.072P)2 + 0.1037P] where P = (Fo2 + 2Fc2)/3 |
3627 reflections | (Δ/σ)max < 0.001 |
212 parameters | Δρmax = 0.29 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C19H11NO3 | γ = 75.862 (12)° |
Mr = 301.29 | V = 683.94 (19) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.3250 (11) Å | Mo Kα radiation |
b = 9.7916 (16) Å | µ = 0.10 mm−1 |
c = 10.4532 (17) Å | T = 298 K |
α = 70.401 (13)° | 0.40 × 0.30 × 0.29 mm |
β = 82.503 (13)° |
Stoe IPDS II diffractometer | 3161 reflections with I > 2σ(I) |
7737 measured reflections | Rint = 0.040 |
3627 independent reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.136 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.13 | Δρmax = 0.29 e Å−3 |
3627 reflections | Δρmin = −0.22 e Å−3 |
212 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 | ||
C1 | 0.60706 (15) | 0.62937 (12) | 0.49240 (11) | 0.0298 (2) | |
C2 | 0.69780 (16) | 0.61664 (13) | 0.36032 (12) | 0.0324 (2) | |
C3 | 0.87442 (18) | 0.53663 (16) | 0.33404 (14) | 0.0410 (3) | |
H3 | 0.9488 | 0.4711 | 0.4042 | 0.049* | |
C4 | 0.9358 (2) | 0.55825 (19) | 0.19890 (16) | 0.0494 (3) | |
H4 | 1.0540 | 0.5065 | 0.1779 | 0.059* | |
C5 | 0.8237 (2) | 0.65604 (19) | 0.09393 (15) | 0.0502 (3) | |
H5 | 0.8694 | 0.6697 | 0.0042 | 0.060* | |
C6 | 0.6452 (2) | 0.73333 (16) | 0.12066 (13) | 0.0425 (3) | |
H6 | 0.5690 | 0.7968 | 0.0507 | 0.051* | |
C7 | 0.58481 (16) | 0.71222 (13) | 0.25611 (12) | 0.0332 (2) | |
C8 | 0.40104 (16) | 0.77784 (12) | 0.31604 (11) | 0.0318 (2) | |
C9 | 0.33814 (17) | 0.94765 (13) | 0.28511 (13) | 0.0374 (3) | |
C10 | 0.29102 (17) | 0.97079 (13) | 0.41761 (13) | 0.0358 (3) | |
C11 | 0.19816 (19) | 1.10289 (14) | 0.44465 (16) | 0.0441 (3) | |
H11 | 0.1640 | 1.1909 | 0.3742 | 0.053* | |
C12 | 0.15988 (19) | 1.09807 (16) | 0.57670 (17) | 0.0469 (3) | |
H12 | 0.0981 | 1.1843 | 0.5963 | 0.056* | |
C13 | 0.21185 (17) | 0.96457 (16) | 0.68549 (15) | 0.0413 (3) | |
C14 | 0.1701 (2) | 0.9614 (2) | 0.82289 (17) | 0.0541 (4) | |
H14 | 0.1102 | 1.0485 | 0.8415 | 0.065* | |
C15 | 0.2156 (2) | 0.8347 (2) | 0.92698 (17) | 0.0596 (4) | |
H15 | 0.1890 | 0.8359 | 1.0161 | 0.071* | |
C16 | 0.3028 (2) | 0.7010 (2) | 0.90168 (15) | 0.0545 (4) | |
H16 | 0.3306 | 0.6140 | 0.9742 | 0.065* | |
C17 | 0.34726 (19) | 0.69747 (16) | 0.77121 (13) | 0.0422 (3) | |
H17 | 0.4051 | 0.6082 | 0.7558 | 0.051* | |
C18 | 0.30558 (16) | 0.82910 (14) | 0.65996 (12) | 0.0344 (2) | |
C19 | 0.34334 (15) | 0.83897 (12) | 0.52100 (12) | 0.0310 (2) | |
O1 | 0.67384 (13) | 0.57343 (10) | 0.60386 (9) | 0.0374 (2) | |
O2 | 0.24447 (12) | 0.73626 (10) | 0.28658 (9) | 0.0376 (2) | |
H2 | 0.268 (3) | 0.630 (2) | 0.317 (2) | 0.066 (6)* | |
O3 | 0.32112 (19) | 1.03639 (12) | 0.17284 (11) | 0.0592 (3) | |
N1 | 0.43075 (13) | 0.72309 (10) | 0.46469 (9) | 0.0303 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0310 (5) | 0.0265 (5) | 0.0314 (5) | −0.0044 (4) | −0.0037 (4) | −0.0091 (4) |
C2 | 0.0318 (5) | 0.0332 (5) | 0.0334 (5) | −0.0057 (4) | −0.0021 (4) | −0.0128 (4) |
C3 | 0.0329 (6) | 0.0468 (7) | 0.0462 (7) | −0.0022 (5) | −0.0040 (5) | −0.0221 (6) |
C4 | 0.0366 (6) | 0.0628 (9) | 0.0545 (8) | −0.0073 (6) | 0.0071 (6) | −0.0317 (7) |
C5 | 0.0490 (8) | 0.0656 (9) | 0.0402 (7) | −0.0176 (7) | 0.0120 (6) | −0.0237 (7) |
C6 | 0.0460 (7) | 0.0487 (7) | 0.0309 (6) | −0.0114 (5) | 0.0016 (5) | −0.0106 (5) |
C7 | 0.0339 (5) | 0.0342 (5) | 0.0308 (5) | −0.0075 (4) | −0.0004 (4) | −0.0096 (4) |
C8 | 0.0328 (5) | 0.0321 (5) | 0.0268 (5) | −0.0041 (4) | −0.0038 (4) | −0.0057 (4) |
C9 | 0.0367 (6) | 0.0319 (5) | 0.0370 (6) | −0.0045 (4) | −0.0026 (4) | −0.0040 (4) |
C10 | 0.0323 (5) | 0.0302 (5) | 0.0430 (6) | −0.0053 (4) | −0.0014 (4) | −0.0104 (5) |
C11 | 0.0384 (6) | 0.0293 (6) | 0.0628 (8) | −0.0041 (5) | −0.0020 (6) | −0.0146 (5) |
C12 | 0.0378 (6) | 0.0398 (7) | 0.0697 (9) | −0.0068 (5) | 0.0044 (6) | −0.0297 (7) |
C13 | 0.0310 (5) | 0.0490 (7) | 0.0540 (7) | −0.0105 (5) | 0.0038 (5) | −0.0301 (6) |
C14 | 0.0438 (7) | 0.0725 (10) | 0.0611 (9) | −0.0126 (7) | 0.0084 (6) | −0.0447 (9) |
C15 | 0.0510 (8) | 0.0929 (13) | 0.0467 (8) | −0.0148 (8) | 0.0065 (6) | −0.0413 (9) |
C16 | 0.0540 (8) | 0.0735 (10) | 0.0354 (7) | −0.0126 (7) | 0.0017 (6) | −0.0188 (7) |
C17 | 0.0428 (7) | 0.0495 (7) | 0.0346 (6) | −0.0087 (5) | 0.0009 (5) | −0.0158 (5) |
C18 | 0.0290 (5) | 0.0408 (6) | 0.0379 (6) | −0.0088 (4) | 0.0016 (4) | −0.0184 (5) |
C19 | 0.0278 (5) | 0.0304 (5) | 0.0353 (5) | −0.0060 (4) | 0.0001 (4) | −0.0119 (4) |
O1 | 0.0403 (5) | 0.0356 (4) | 0.0330 (4) | −0.0006 (3) | −0.0097 (3) | −0.0091 (3) |
O2 | 0.0338 (4) | 0.0389 (5) | 0.0380 (4) | −0.0049 (3) | −0.0085 (3) | −0.0089 (4) |
O3 | 0.0753 (8) | 0.0408 (6) | 0.0421 (5) | −0.0017 (5) | −0.0040 (5) | 0.0047 (4) |
N1 | 0.0325 (5) | 0.0292 (4) | 0.0265 (4) | −0.0019 (3) | −0.0028 (3) | −0.0080 (3) |
C1—O1 | 1.2192 (14) | C10—C19 | 1.3826 (16) |
C1—N1 | 1.3908 (14) | C10—C11 | 1.4075 (17) |
C1—C2 | 1.4829 (16) | C11—C12 | 1.359 (2) |
C2—C3 | 1.3855 (16) | C11—H11 | 0.9300 |
C2—C7 | 1.3858 (16) | C12—C13 | 1.421 (2) |
C3—C4 | 1.387 (2) | C12—H12 | 0.9300 |
C3—H3 | 0.9300 | C13—C14 | 1.420 (2) |
C4—C5 | 1.393 (2) | C13—C18 | 1.4307 (17) |
C4—H4 | 0.9300 | C14—C15 | 1.349 (3) |
C5—C6 | 1.387 (2) | C14—H14 | 0.9300 |
C5—H5 | 0.9300 | C15—C16 | 1.404 (3) |
C6—C7 | 1.3885 (17) | C15—H15 | 0.9300 |
C6—H6 | 0.9300 | C16—C17 | 1.3704 (18) |
C7—C8 | 1.4983 (16) | C16—H16 | 0.9300 |
C8—O2 | 1.4071 (14) | C17—C18 | 1.4148 (19) |
C8—N1 | 1.4905 (14) | C17—H17 | 0.9300 |
C8—C9 | 1.5445 (16) | C18—C19 | 1.4177 (16) |
C9—O3 | 1.2037 (16) | C19—N1 | 1.4278 (14) |
C9—C10 | 1.4616 (18) | O2—H2 | 0.96 (2) |
O1—C1—N1 | 125.83 (10) | C11—C10—C9 | 127.75 (12) |
O1—C1—C2 | 127.52 (10) | C12—C11—C10 | 118.08 (13) |
N1—C1—C2 | 106.62 (9) | C12—C11—H11 | 121.0 |
C3—C2—C7 | 121.55 (11) | C10—C11—H11 | 121.0 |
C3—C2—C1 | 128.81 (11) | C11—C12—C13 | 121.64 (12) |
C7—C2—C1 | 109.36 (10) | C11—C12—H12 | 119.2 |
C2—C3—C4 | 117.33 (12) | C13—C12—H12 | 119.2 |
C2—C3—H3 | 121.3 | C14—C13—C12 | 120.91 (13) |
C4—C3—H3 | 121.3 | C14—C13—C18 | 118.03 (14) |
C3—C4—C5 | 121.23 (13) | C12—C13—C18 | 121.06 (12) |
C3—C4—H4 | 119.4 | C15—C14—C13 | 121.45 (14) |
C5—C4—H4 | 119.4 | C15—C14—H14 | 119.3 |
C6—C5—C4 | 121.25 (12) | C13—C14—H14 | 119.3 |
C6—C5—H5 | 119.4 | C14—C15—C16 | 120.45 (14) |
C4—C5—H5 | 119.4 | C14—C15—H15 | 119.8 |
C5—C6—C7 | 117.34 (13) | C16—C15—H15 | 119.8 |
C5—C6—H6 | 121.3 | C17—C16—C15 | 120.69 (16) |
C7—C6—H6 | 121.3 | C17—C16—H16 | 119.7 |
C2—C7—C6 | 121.28 (11) | C15—C16—H16 | 119.7 |
C2—C7—C8 | 109.15 (10) | C16—C17—C18 | 120.21 (14) |
C6—C7—C8 | 129.57 (11) | C16—C17—H17 | 119.9 |
O2—C8—N1 | 111.82 (9) | C18—C17—H17 | 119.9 |
O2—C8—C7 | 113.83 (9) | C17—C18—C19 | 125.32 (11) |
N1—C8—C7 | 103.29 (9) | C17—C18—C13 | 119.13 (12) |
O2—C8—C9 | 104.10 (9) | C19—C18—C13 | 115.52 (12) |
N1—C8—C9 | 103.13 (9) | C10—C19—C18 | 121.92 (11) |
C7—C8—C9 | 120.25 (10) | C10—C19—N1 | 109.84 (10) |
O3—C9—C10 | 129.58 (12) | C18—C19—N1 | 128.21 (10) |
O3—C9—C8 | 124.77 (12) | C8—O2—H2 | 107.6 (12) |
C10—C9—C8 | 105.45 (9) | C1—N1—C19 | 126.89 (9) |
C19—C10—C11 | 121.77 (12) | C1—N1—C8 | 111.06 (9) |
C19—C10—C9 | 110.43 (10) | C19—N1—C8 | 108.74 (9) |
O1—C1—C2—C3 | 1.8 (2) | C11—C12—C13—C18 | −0.5 (2) |
N1—C1—C2—C3 | 179.64 (12) | C12—C13—C14—C15 | 178.73 (14) |
O1—C1—C2—C7 | −172.16 (12) | C18—C13—C14—C15 | −0.5 (2) |
N1—C1—C2—C7 | 5.70 (13) | C13—C14—C15—C16 | −1.3 (2) |
C7—C2—C3—C4 | 1.3 (2) | C14—C15—C16—C17 | 1.6 (3) |
C1—C2—C3—C4 | −171.95 (12) | C15—C16—C17—C18 | 0.0 (2) |
C2—C3—C4—C5 | −0.3 (2) | C16—C17—C18—C19 | −179.45 (13) |
C3—C4—C5—C6 | −1.2 (2) | C16—C17—C18—C13 | −1.7 (2) |
C4—C5—C6—C7 | 1.6 (2) | C14—C13—C18—C17 | 2.00 (18) |
C3—C2—C7—C6 | −0.90 (19) | C12—C13—C18—C17 | −177.24 (12) |
C1—C2—C7—C6 | 173.56 (11) | C14—C13—C18—C19 | 179.92 (11) |
C3—C2—C7—C8 | 177.95 (11) | C12—C13—C18—C19 | 0.68 (17) |
C1—C2—C7—C8 | −7.60 (13) | C11—C10—C19—C18 | 0.37 (18) |
C5—C6—C7—C2 | −0.6 (2) | C9—C10—C19—C18 | −177.05 (10) |
C5—C6—C7—C8 | −179.17 (13) | C11—C10—C19—N1 | 178.75 (11) |
C2—C7—C8—O2 | −115.06 (11) | C9—C10—C19—N1 | 1.33 (14) |
C6—C7—C8—O2 | 63.66 (17) | C17—C18—C19—C10 | 177.17 (12) |
C2—C7—C8—N1 | 6.39 (12) | C13—C18—C19—C10 | −0.61 (17) |
C6—C7—C8—N1 | −174.89 (13) | C17—C18—C19—N1 | −0.9 (2) |
C2—C7—C8—C9 | 120.48 (11) | C13—C18—C19—N1 | −178.66 (10) |
C6—C7—C8—C9 | −60.81 (18) | O1—C1—N1—C19 | 40.41 (18) |
O2—C8—C9—O3 | −72.49 (16) | C2—C1—N1—C19 | −137.50 (11) |
N1—C8—C9—O3 | 170.63 (13) | O1—C1—N1—C8 | 176.42 (11) |
C7—C8—C9—O3 | 56.47 (18) | C2—C1—N1—C8 | −1.48 (12) |
O2—C8—C9—C10 | 102.75 (10) | C10—C19—N1—C1 | 125.80 (12) |
N1—C8—C9—C10 | −14.13 (12) | C18—C19—N1—C1 | −55.95 (17) |
C7—C8—C9—C10 | −128.29 (11) | C10—C19—N1—C8 | −11.01 (13) |
O3—C9—C10—C19 | −176.69 (14) | C18—C19—N1—C8 | 167.23 (11) |
C8—C9—C10—C19 | 8.38 (13) | O2—C8—N1—C1 | 119.96 (10) |
O3—C9—C10—C11 | 6.1 (2) | C7—C8—N1—C1 | −2.84 (12) |
C8—C9—C10—C11 | −168.84 (12) | C9—C8—N1—C1 | −128.76 (10) |
C19—C10—C11—C12 | −0.18 (19) | O2—C8—N1—C19 | −95.95 (11) |
C9—C10—C11—C12 | 176.77 (12) | C7—C8—N1—C19 | 141.25 (9) |
C10—C11—C12—C13 | 0.3 (2) | C9—C8—N1—C19 | 15.33 (11) |
C11—C12—C13—C14 | −179.76 (13) |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···O1i | 0.96 (2) | 1.85 (2) | 2.7978 (15) | 172.2 (17) |
C6—H6···O3ii | 0.93 | 2.52 | 3.1609 (18) | 126 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | C19H11NO3 |
Mr | 301.29 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 7.3250 (11), 9.7916 (16), 10.4532 (17) |
α, β, γ (°) | 70.401 (13), 82.503 (13), 75.862 (12) |
V (Å3) | 683.94 (19) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.40 × 0.30 × 0.29 |
Data collection | |
Diffractometer | Stoe IPDS II diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7737, 3627, 3161 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.688 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.136, 1.13 |
No. of reflections | 3627 |
No. of parameters | 212 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.29, −0.22 |
Computer programs: X-RED32 (Stoe & Cie, 2005), X-AREA (Stoe & Cie, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···O1i | 0.96 (2) | 1.85 (2) | 2.7978 (15) | 172.2 (17) |
C6—H6···O3ii | 0.93 | 2.52 | 3.1609 (18) | 126 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1, −y+2, −z. |
Acknowledgements
We are grateful to the Islamic Azad University, Yazd Branch, for financial support.
References
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Naphthylamine is an aromatic amine which can be obtained from nitronaphthalene. Naphthylamines are used in the manufacture of dyes, condensation colors, and rubber and in the synthesis of a large number of chemical (Black et al. 1994; Valenti et al. 2006). Ninhydrin (2,2-dihydroxyindane-1,3-dione) is a chemical used to detect ammonia or primary and secondary amines. The carbon atom of a carbonyl bears a partial positive charge enhanced by neighboring electron withdrawing groups like carbonyl itself. So the central carbon of a 1,2,3-tricarbonyl compound is much more electrophilic than one in a simple ketone. Thus indane-1,2,3-trione reacts readily with nucleophiles, including water. Whereas for most carbonyl compounds, a carbonyl form is more stable than a product of water addition (hydrate), ninhydrin forms a stable hydrate of the central carbon because of the destabilizing effect of the adjacent carbonyl groups.
We report here the crystal structure of 7-hydroxy-7-aH-benzo[g] isoindolino[1,2-α]indole-7,10-dione. The title compound was prepared by the reaction of α-naphthylamine and ninhydrine in molar ratio of 1: 1 in acetone. The structure of title complex is shown in Fig. 1. There are intermolecular hydrogen bondings between O—H···O and C—H···O which play important role in the stabilization of crystalline network (Table 1 & Fig. 2).