organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 2056-9890

N2-[1-(2-Hy­droxy­phen­yl)ethyl­­idene]-N2′-(1H-indol-3-ylmethyl­ene)carbonic dihydrazide

aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and bDepartment of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: hapipah@um.edu.my

(Received 23 October 2008; accepted 31 October 2008; online 13 November 2008)

In the crystal structure of the title compound {alternative name: 1-[1-(2-hydroxy­phen­yl)ethyl­ideneamino]-3-(1H-indol-3-ylmethyl­eneamino)urea}, C18H17N5O2, the planar indole component is twisted at an angle of 63.7 (10)° with respect to the rest of the mol­ecule. This compound is one of a series being studied for biological activity. The hydr­oxy groups are involved in both intra­molecular (O—H⋯N) and inter­molecular (N—H⋯O) hydrogen bonds.

Related literature

For a related compound, see: Dan et al. (1987[Dan, J., Seth, S. & Chakraborty, S. (1987). Acta Cryst. C43, 1114-1116.]).

[Scheme 1]

Experimental

Crystal data
  • C18H17N5O2

  • Mr = 335.37

  • Monoclinic, P 21 /n

  • a = 7.0802 (8) Å

  • b = 9.5335 (11) Å

  • c = 25.110 (3) Å

  • β = 97.295 (2)°

  • V = 1681.2 (3) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.09 mm−1

  • T = 100 (2) K

  • 0.42 × 0.42 × 0.16 mm

Data collection
  • Bruker APEXII CCD area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996[Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.]) Tmin = 0.821, Tmax = 0.986

  • 11912 measured reflections

  • 4740 independent reflections

  • 4145 reflections with I > 2σ(I)

  • Rint = 0.014

Refinement
  • R[F2 > 2σ(F2)] = 0.043

  • wR(F2) = 0.122

  • S = 1.03

  • 4740 reflections

  • 228 parameters

  • H-atom parameters constrained

  • Δρmax = 0.43 e Å−3

  • Δρmin = −0.32 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
O1—H1A⋯N5 0.84 1.78 2.5121 (11) 145
N3—H3B⋯O2i 0.88 1.99 2.8481 (13) 166
N1—H1B⋯O1ii 0.88 2.14 2.8803 (13) 142
Symmetry codes: (i) -x+1, -y, -z; (ii) [x+{\script{1\over 2}}, -y+{\script{1\over 2}}, z+{\script{1\over 2}}].

Data collection: APEX2 (Bruker, 2007[Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2007[Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: X-SEED (Barbour, 2001[Barbour, L. J. (2001). J. Supramol. Chem. 1, 189-191.]); software used to prepare material for publication: publCIF (Westrip, 2008[Westrip, S. P. (2008). publCIF. In preparation.]).

Supporting information


Comment top

X-ray structures, of Schiff bases derived from condensation of indole-3-carboxaldehyde and 2-hydroxyacetophenone, have not been investigated. The title compound (Fig. 1) appears to be the first example with the planar indole component is twisted at an angle of 116.3 (10)° with respect to the rest of the molecule. However, compound bis(salicylidene)carbonohydrazide (Dan et al.1987), which was reported previously shows planarity for the whole molecule.

Related literature top

For a related compound, see: Dan et al. (1987).

Experimental top

Indole-3-carboxaldehyde (0.30 g, 2.07 mmol), carbohydrazide (0.187 g, 2.07 mmol), and 2-Hydroxyacetophenone (0.24 ml, 2.07 mmol) were heated in acidified ethanol (20 ml) for 2 h. The solvent was removed and the product recrystallized from DMSO.

Refinement top

Hydrogen atoms were placed at calculated positions (C—H 0.95, N—H 0.88 and O—H 0.84 Å), with U(H) set to 1.2–1.5 times Ueq(C,N,O).

Computing details top

Data collection: APEX2 (Bruker, 2007); cell refinement: APEX2 (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: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2008).

Figures top
[Figure 1] Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of C18H17N5O2 at 70% probability level. Hydrogen atoms are drawn as spheres of arbitrary radius
1-[1-(2-hydroxyphenyl)ethylideneamino]-3-(1H-indol-3- ylmethyleneamino)urea top
Crystal data top
C18H17N5O2F(000) = 704
Mr = 335.37Dx = 1.325 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ynCell parameters from 6889 reflections
a = 7.0802 (8) Åθ = 2.3–30.5°
b = 9.5335 (11) ŵ = 0.09 mm1
c = 25.110 (3) ÅT = 100 K
β = 97.295 (2)°Irregular, colourless
V = 1681.2 (3) Å30.42 × 0.42 × 0.16 mm
Z = 4
Data collection top
Bruker APEXII CCD area-detector
diffractometer
4740 independent reflections
Radiation source: fine-focus sealed tube4145 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.014
ω scansθmax = 30.6°, θmin = 2.3°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
h = 104
Tmin = 0.821, Tmax = 0.986k = 1312
11912 measured reflectionsl = 3435
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.044Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.122H-atom parameters constrained
S = 1.03 w = 1/[σ2(Fo2) + (0.0656P)2 + 0.7125P]
where P = (Fo2 + 2Fc2)/3
4740 reflections(Δ/σ)max < 0.001
228 parametersΔρmax = 0.43 e Å3
0 restraintsΔρmin = 0.32 e Å3
Crystal data top
C18H17N5O2V = 1681.2 (3) Å3
Mr = 335.37Z = 4
Monoclinic, P21/nMo Kα radiation
a = 7.0802 (8) ŵ = 0.09 mm1
b = 9.5335 (11) ÅT = 100 K
c = 25.110 (3) Å0.42 × 0.42 × 0.16 mm
β = 97.295 (2)°
Data collection top
Bruker APEXII CCD area-detector
diffractometer
4740 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
4145 reflections with I > 2σ(I)
Tmin = 0.821, Tmax = 0.986Rint = 0.014
11912 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0440 restraints
wR(F2) = 0.122H-atom parameters constrained
S = 1.03Δρmax = 0.43 e Å3
4740 reflectionsΔρmin = 0.32 e Å3
228 parameters
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
xyzUiso*/Ueq
N20.47231 (13)0.13948 (10)0.11232 (3)0.01593 (18)
O20.38944 (12)0.16315 (8)0.02799 (3)0.01958 (18)
O10.22435 (14)0.47449 (9)0.09575 (3)0.0246 (2)
H1A0.25980.42520.06860.037*
N50.28865 (13)0.41919 (9)0.00270 (3)0.01540 (18)
N30.45872 (14)0.09630 (10)0.05941 (4)0.01774 (19)
H3B0.48780.00990.05130.021*
C130.17966 (15)0.64221 (11)0.02541 (4)0.0159 (2)
N40.35380 (14)0.31965 (9)0.03933 (3)0.01631 (19)
H4B0.36630.33740.07400.020*
C110.25266 (15)0.54484 (11)0.01820 (4)0.0150 (2)
C100.39925 (15)0.19077 (11)0.02031 (4)0.0155 (2)
C90.57339 (15)0.06194 (11)0.14689 (4)0.0160 (2)
H90.63460.01930.13540.019*
C80.59385 (15)0.09842 (11)0.20307 (4)0.0153 (2)
N10.69458 (15)0.09189 (10)0.29159 (4)0.0203 (2)
H1B0.75900.06760.32250.024*
C120.28004 (18)0.59167 (13)0.07571 (5)0.0224 (2)
H12A0.15930.58330.09070.034*
H12B0.32230.68960.07770.034*
H12C0.37640.53260.09630.034*
C140.16631 (16)0.60243 (11)0.07989 (4)0.0180 (2)
C150.09241 (18)0.69504 (13)0.12025 (5)0.0237 (2)
H150.08130.66640.15680.028*
C70.71448 (17)0.03294 (12)0.24298 (4)0.0192 (2)
H70.79860.04180.23750.023*
C50.49227 (15)0.20425 (11)0.22913 (4)0.0147 (2)
C180.12097 (18)0.77799 (12)0.01393 (5)0.0240 (2)
H180.12940.80760.02240.029*
C30.48431 (17)0.27906 (12)0.32274 (5)0.0208 (2)
H30.53030.27210.35990.025*
C10.27606 (18)0.38481 (13)0.24917 (5)0.0255 (3)
H10.17910.45090.23760.031*
C40.55764 (16)0.19532 (11)0.28456 (4)0.0164 (2)
C20.34160 (18)0.37266 (13)0.30407 (5)0.0247 (2)
H20.28680.42990.32900.030*
C170.05073 (19)0.87046 (13)0.05440 (6)0.0283 (3)
H170.01340.96250.04570.034*
C60.35025 (16)0.30202 (12)0.21144 (5)0.0200 (2)
H60.30560.31140.17430.024*
C160.03524 (18)0.82812 (13)0.10749 (5)0.0264 (3)
H160.01480.89070.13520.032*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
N20.0201 (4)0.0163 (4)0.0114 (4)0.0015 (3)0.0021 (3)0.0005 (3)
O20.0286 (4)0.0170 (4)0.0127 (3)0.0047 (3)0.0009 (3)0.0006 (3)
O10.0389 (5)0.0196 (4)0.0140 (4)0.0084 (4)0.0020 (3)0.0002 (3)
N50.0172 (4)0.0140 (4)0.0148 (4)0.0021 (3)0.0012 (3)0.0020 (3)
N30.0264 (5)0.0145 (4)0.0121 (4)0.0054 (3)0.0016 (3)0.0001 (3)
C130.0141 (4)0.0142 (4)0.0192 (5)0.0006 (4)0.0015 (4)0.0011 (4)
N40.0228 (5)0.0140 (4)0.0118 (4)0.0046 (3)0.0008 (3)0.0009 (3)
C110.0144 (4)0.0146 (4)0.0162 (4)0.0004 (4)0.0027 (3)0.0004 (4)
C100.0175 (5)0.0144 (4)0.0143 (4)0.0017 (4)0.0013 (4)0.0002 (3)
C90.0180 (5)0.0149 (4)0.0153 (4)0.0021 (4)0.0033 (4)0.0004 (4)
C80.0172 (5)0.0148 (4)0.0139 (4)0.0013 (4)0.0024 (4)0.0012 (3)
N10.0262 (5)0.0209 (5)0.0128 (4)0.0031 (4)0.0008 (3)0.0018 (3)
C120.0300 (6)0.0201 (5)0.0173 (5)0.0019 (4)0.0036 (4)0.0036 (4)
C140.0173 (5)0.0162 (5)0.0197 (5)0.0010 (4)0.0007 (4)0.0018 (4)
C150.0235 (6)0.0242 (6)0.0221 (5)0.0013 (4)0.0028 (4)0.0061 (4)
C70.0232 (5)0.0187 (5)0.0157 (5)0.0044 (4)0.0016 (4)0.0015 (4)
C50.0161 (5)0.0138 (4)0.0143 (4)0.0022 (4)0.0027 (3)0.0007 (3)
C180.0265 (6)0.0172 (5)0.0281 (6)0.0045 (4)0.0033 (5)0.0003 (4)
C30.0244 (6)0.0212 (5)0.0176 (5)0.0058 (4)0.0052 (4)0.0048 (4)
C10.0210 (6)0.0239 (6)0.0310 (6)0.0058 (4)0.0013 (5)0.0083 (5)
C40.0188 (5)0.0151 (5)0.0156 (5)0.0030 (4)0.0030 (4)0.0003 (4)
C20.0240 (6)0.0244 (6)0.0269 (6)0.0022 (5)0.0076 (5)0.0108 (5)
C170.0284 (6)0.0161 (5)0.0402 (7)0.0068 (4)0.0034 (5)0.0046 (5)
C60.0189 (5)0.0199 (5)0.0208 (5)0.0031 (4)0.0002 (4)0.0029 (4)
C160.0219 (6)0.0218 (6)0.0343 (6)0.0021 (4)0.0013 (5)0.0116 (5)
Geometric parameters (Å, º) top
N2—C91.2862 (14)C12—H12A0.9800
N2—N31.3824 (12)C12—H12B0.9800
O2—C101.2344 (13)C12—H12C0.9800
O1—C141.3626 (13)C14—C151.3949 (15)
O1—H1A0.8400C15—C161.3816 (18)
N5—C111.2948 (13)C15—H150.9500
N5—N41.3608 (12)C7—H70.9500
N3—C101.3591 (13)C5—C61.4013 (15)
N3—H3B0.8800C5—C41.4125 (14)
C13—C181.4007 (15)C18—C171.3887 (17)
C13—C141.4111 (15)C18—H180.9500
C13—C111.4779 (14)C3—C21.3844 (18)
N4—C101.3712 (13)C3—C41.3973 (15)
N4—H4B0.8800C3—H30.9500
C11—C121.5003 (15)C1—C61.3866 (16)
C9—C81.4424 (14)C1—C21.4024 (18)
C9—H90.9500C1—H10.9500
C8—C71.3807 (14)C2—H20.9500
C8—C51.4431 (14)C17—C161.384 (2)
N1—C71.3672 (14)C17—H170.9500
N1—C41.3784 (14)C6—H60.9500
N1—H1B0.8800C16—H160.9500
C9—N2—N3116.25 (9)C15—C14—C13120.46 (10)
C14—O1—H1A109.5C16—C15—C14120.45 (11)
C11—N5—N4120.31 (9)C16—C15—H15119.8
C10—N3—N2118.31 (9)C14—C15—H15119.8
C10—N3—H3B120.8N1—C7—C8109.75 (10)
N2—N3—H3B120.8N1—C7—H7125.1
C18—C13—C14117.56 (10)C8—C7—H7125.1
C18—C13—C11120.87 (10)C6—C5—C4118.98 (10)
C14—C13—C11121.57 (9)C6—C5—C8134.45 (10)
N5—N4—C10117.64 (9)C4—C5—C8106.55 (9)
N5—N4—H4B121.2C17—C18—C13121.61 (12)
C10—N4—H4B121.2C17—C18—H18119.2
N5—C11—C13114.95 (9)C13—C18—H18119.2
N5—C11—C12123.94 (10)C2—C3—C4117.05 (10)
C13—C11—C12121.10 (9)C2—C3—H3121.5
O2—C10—N3122.82 (10)C4—C3—H3121.5
O2—C10—N4123.15 (9)C6—C1—C2121.18 (11)
N3—C10—N4114.02 (9)C6—C1—H1119.4
N2—C9—C8119.98 (10)C2—C1—H1119.4
N2—C9—H9120.0N1—C4—C3129.59 (10)
C8—C9—H9120.0N1—C4—C5107.85 (9)
C7—C8—C9125.24 (10)C3—C4—C5122.54 (10)
C7—C8—C5106.56 (9)C3—C2—C1121.48 (11)
C9—C8—C5128.18 (9)C3—C2—H2119.3
C7—N1—C4109.28 (9)C1—C2—H2119.3
C7—N1—H1B125.4C16—C17—C18119.80 (11)
C4—N1—H1B125.4C16—C17—H17120.1
C11—C12—H12A109.5C18—C17—H17120.1
C11—C12—H12B109.5C1—C6—C5118.75 (11)
H12A—C12—H12B109.5C1—C6—H6120.6
C11—C12—H12C109.5C5—C6—H6120.6
H12A—C12—H12C109.5C15—C16—C17120.09 (11)
H12B—C12—H12C109.5C15—C16—H16120.0
O1—C14—C15116.97 (10)C17—C16—H16120.0
O1—C14—C13122.57 (9)
C9—N2—N3—C10162.57 (10)C5—C8—C7—N10.35 (13)
C11—N5—N4—C10176.52 (10)C7—C8—C5—C6178.47 (12)
N4—N5—C11—C13179.00 (9)C9—C8—C5—C60.3 (2)
N4—N5—C11—C120.64 (16)C7—C8—C5—C40.58 (12)
C18—C13—C11—N5174.99 (10)C9—C8—C5—C4177.62 (10)
C14—C13—C11—N55.00 (15)C14—C13—C18—C170.46 (18)
C18—C13—C11—C124.66 (16)C11—C13—C18—C17179.52 (11)
C14—C13—C11—C12175.35 (10)C7—N1—C4—C3177.00 (11)
N2—N3—C10—O2177.29 (10)C7—N1—C4—C51.54 (13)
N2—N3—C10—N41.86 (15)C2—C3—C4—N1178.03 (11)
N5—N4—C10—O22.37 (16)C2—C3—C4—C50.33 (17)
N5—N4—C10—N3178.48 (9)C6—C5—C4—N1179.57 (10)
N3—N2—C9—C8179.42 (9)C8—C5—C4—N11.29 (12)
N2—C9—C8—C7172.45 (11)C6—C5—C4—C30.90 (16)
N2—C9—C8—C59.66 (17)C8—C5—C4—C3177.38 (10)
C18—C13—C14—O1178.09 (11)C4—C3—C2—C11.19 (18)
C11—C13—C14—O11.93 (17)C6—C1—C2—C30.8 (2)
C18—C13—C14—C151.62 (16)C13—C18—C17—C160.9 (2)
C11—C13—C14—C15178.37 (10)C2—C1—C6—C50.44 (18)
O1—C14—C15—C16178.26 (11)C4—C5—C6—C11.26 (16)
C13—C14—C15—C161.46 (18)C8—C5—C6—C1176.42 (12)
C4—N1—C7—C81.19 (13)C14—C15—C16—C170.10 (19)
C9—C8—C7—N1178.62 (10)C18—C17—C16—C151.1 (2)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1A···N50.841.782.5121 (11)145
N3—H3B···O2i0.881.992.8481 (13)166
N1—H1B···O1ii0.882.142.8803 (13)142
Symmetry codes: (i) x+1, y, z; (ii) x+1/2, y+1/2, z+1/2.

Experimental details

Crystal data
Chemical formulaC18H17N5O2
Mr335.37
Crystal system, space groupMonoclinic, P21/n
Temperature (K)100
a, b, c (Å)7.0802 (8), 9.5335 (11), 25.110 (3)
β (°) 97.295 (2)
V3)1681.2 (3)
Z4
Radiation typeMo Kα
µ (mm1)0.09
Crystal size (mm)0.42 × 0.42 × 0.16
Data collection
DiffractometerBruker APEXII CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Sheldrick, 1996)
Tmin, Tmax0.821, 0.986
No. of measured, independent and
observed [I > 2σ(I)] reflections
11912, 4740, 4145
Rint0.014
(sin θ/λ)max1)0.715
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.044, 0.122, 1.03
No. of reflections4740
No. of parameters228
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.43, 0.32

Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2008).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1A···N50.841.782.5121 (11)145
N3—H3B···O2i0.881.992.8481 (13)166
N1—H1B···O1ii0.882.142.8803 (13)142
Symmetry codes: (i) x+1, y, z; (ii) x+1/2, y+1/2, z+1/2.
 

Acknowledgements

The authors thank the University of Malaya for funding this study (Science Fund Grants 12–02-03–2031, 12–02-03–2051 and PJP FS350–2008 A).

References

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