organic compounds
2-Cyclopentylidenehydrazinecarboxamide
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bMedicinal Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575 025, India, and cBiotechnology Division, Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore 575 025, India
*Correspondence e-mail: hkfun@usm.my
The 6H11N3O, consists of two independent molecules in which the cyclopentane rings adopt envelope conformations with CH2 grouping as the flap and the semicarbazone groups are essentially planar, with maximums deviation of 0.0311 (12) and 0.0285 (12) Å. In the crystal, N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds link the molecules to form sheets lying parallel to the ab plane.
of the title compound, CRelated literature
For background to the biological activity of et al. (1999); Pandeya & Dimmock (1993); Pandeya et al. (1998); Yogeeswari et al. (2004); Sriram et al. (2004); Fun et al. (2011). For related structures, see: Fun et al. (2009a,b). For further synthetic details, see: Furniss et al. (1978). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
see: DoganExperimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536812034599/hb6915sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812034599/hb6915Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812034599/hb6915Isup3.cml
Semicarbazide hydrochloride (0.66 g, 0.0059 mol) and freshly recrystallized sodium acetate (0.58 g, 0.007 mol) were dissolved in water (10 ml) following a literature procedure (Furniss et al., 1978). The reaction mixture was stirred at room temperature for 10 minutes. To this, cyclopentanone (0.5 g, 0.0059 mol) was added and shaken well. A little alcohol was added to dissolve the turbidity. It was shaken for 10 more minutes and allowed to stand. The semicarbazone crystallized on standing for 6 h. The separated crystals were filtered, washed with cold water and recrystallized from ethanol as colourless plates. M.p. 495–498 K.
N– bound H atoms were located from the difference Fourier map and were refined freely [N–H = 0.858 (18) to 0.926 (19) Å]. The remaining H atoms were located geometrically and were refined using a riding model with Uiso(H) = 1.2 Ueq(C) [C–H = 0.99 Å]. In the final
one outliner was omitted, 6 11 8.Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound, showing 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound, viewed along the a axis. H atoms not involved in the intermolecular interactions (dashed lines) have been omitted for clarity. |
C6H11N3O | F(000) = 608 |
Mr = 141.18 | Dx = 1.298 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3109 reflections |
a = 8.9507 (1) Å | θ = 2.7–29.3° |
b = 10.7929 (2) Å | µ = 0.09 mm−1 |
c = 15.0204 (2) Å | T = 100 K |
β = 95.126 (1)° | Plate, colourless |
V = 1445.23 (4) Å3 | 0.40 × 0.20 × 0.05 mm |
Z = 8 |
Bruker SMART APEXII CCD diffractometer | 4231 independent reflections |
Radiation source: fine-focus sealed tube | 3120 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.040 |
ϕ and ω scans | θmax = 30.1°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −12→12 |
Tmin = 0.964, Tmax = 0.995 | k = −12→15 |
14322 measured reflections | l = −18→21 |
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)] = 0.049 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.114 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0422P)2 + 0.6439P] where P = (Fo2 + 2Fc2)/3 |
4231 reflections | (Δ/σ)max < 0.001 |
205 parameters | Δρmax = 0.28 e Å−3 |
0 restraints | Δρmin = −0.30 e Å−3 |
C6H11N3O | V = 1445.23 (4) Å3 |
Mr = 141.18 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.9507 (1) Å | µ = 0.09 mm−1 |
b = 10.7929 (2) Å | T = 100 K |
c = 15.0204 (2) Å | 0.40 × 0.20 × 0.05 mm |
β = 95.126 (1)° |
Bruker SMART APEXII CCD diffractometer | 4231 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3120 reflections with I > 2σ(I) |
Tmin = 0.964, Tmax = 0.995 | Rint = 0.040 |
14322 measured reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.114 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | Δρmax = 0.28 e Å−3 |
4231 reflections | Δρmin = −0.30 e Å−3 |
205 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | ||
O1B | 0.14864 (10) | 0.11961 (9) | 0.00969 (7) | 0.0163 (2) | |
N1B | −0.03324 (12) | 0.35060 (10) | 0.12404 (8) | 0.0142 (2) | |
N2B | 0.07174 (12) | 0.29357 (11) | 0.07505 (8) | 0.0148 (2) | |
N3B | −0.07584 (13) | 0.11717 (12) | 0.06934 (9) | 0.0180 (3) | |
C1B | −0.11403 (15) | 0.53548 (13) | 0.19876 (10) | 0.0179 (3) | |
H1BA | −0.0892 | 0.5196 | 0.2633 | 0.021* | |
H1BB | −0.2200 | 0.5125 | 0.1824 | 0.021* | |
C2B | −0.08570 (15) | 0.67107 (13) | 0.17588 (10) | 0.0196 (3) | |
H2BA | −0.1079 | 0.7264 | 0.2256 | 0.024* | |
H2BB | −0.1479 | 0.6964 | 0.1211 | 0.024* | |
C3B | 0.08159 (15) | 0.67431 (13) | 0.16132 (10) | 0.0187 (3) | |
H3BA | 0.1436 | 0.6815 | 0.2190 | 0.022* | |
H3BB | 0.1043 | 0.7450 | 0.1227 | 0.022* | |
C4B | 0.11103 (14) | 0.55001 (12) | 0.11528 (9) | 0.0154 (3) | |
H4BA | 0.1036 | 0.5597 | 0.0495 | 0.018* | |
H4BB | 0.2117 | 0.5175 | 0.1357 | 0.018* | |
C5B | −0.01062 (14) | 0.46502 (12) | 0.14338 (9) | 0.0140 (3) | |
C6B | 0.05040 (14) | 0.17321 (12) | 0.04950 (9) | 0.0132 (3) | |
O1A | 0.35640 (10) | 0.37841 (9) | 0.00812 (7) | 0.0169 (2) | |
N1A | 0.57800 (12) | 0.13301 (11) | 0.09989 (8) | 0.0145 (2) | |
N2A | 0.45488 (12) | 0.19836 (11) | 0.06156 (8) | 0.0153 (3) | |
N3A | 0.60763 (13) | 0.36934 (12) | 0.04762 (9) | 0.0194 (3) | |
C1A | 0.67282 (15) | −0.05543 (13) | 0.17484 (10) | 0.0173 (3) | |
H1AA | 0.7522 | −0.0047 | 0.2072 | 0.021* | |
H1AB | 0.7184 | −0.1093 | 0.1313 | 0.021* | |
C2A | 0.58742 (15) | −0.13169 (14) | 0.23954 (10) | 0.0202 (3) | |
H2AA | 0.5718 | −0.0837 | 0.2941 | 0.024* | |
H2AB | 0.6417 | −0.2091 | 0.2569 | 0.024* | |
C3A | 0.43811 (16) | −0.15927 (14) | 0.18545 (10) | 0.0208 (3) | |
H3AA | 0.3591 | −0.1788 | 0.2254 | 0.025* | |
H3AB | 0.4482 | −0.2299 | 0.1444 | 0.025* | |
C4A | 0.40070 (15) | −0.03906 (13) | 0.13277 (10) | 0.0176 (3) | |
H4AA | 0.3551 | −0.0577 | 0.0718 | 0.021* | |
H4AB | 0.3307 | 0.0133 | 0.1637 | 0.021* | |
C5A | 0.55099 (14) | 0.02476 (12) | 0.12953 (9) | 0.0137 (3) | |
C6A | 0.47038 (14) | 0.31899 (12) | 0.03773 (9) | 0.0138 (3) | |
H1N2 | 0.3656 (19) | 0.1655 (16) | 0.0516 (12) | 0.028 (5)* | |
H1N3 | 0.682 (2) | 0.3267 (17) | 0.0710 (12) | 0.030 (5)* | |
H2N3 | 0.6182 (19) | 0.4510 (18) | 0.0303 (12) | 0.028 (5)* | |
H2N2 | 0.1582 (19) | 0.3309 (16) | 0.0600 (12) | 0.027 (5)* | |
H3N3 | −0.0968 (19) | 0.0420 (18) | 0.0474 (12) | 0.028 (5)* | |
H4N3 | −0.1441 (19) | 0.1587 (16) | 0.0927 (12) | 0.026 (5)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1B | 0.0139 (4) | 0.0136 (5) | 0.0217 (5) | 0.0001 (3) | 0.0040 (4) | −0.0029 (4) |
N1B | 0.0147 (5) | 0.0156 (6) | 0.0128 (5) | 0.0013 (4) | 0.0032 (4) | −0.0006 (4) |
N2B | 0.0128 (5) | 0.0126 (6) | 0.0197 (6) | −0.0009 (4) | 0.0059 (4) | −0.0018 (5) |
N3B | 0.0165 (5) | 0.0131 (6) | 0.0255 (7) | −0.0022 (5) | 0.0082 (5) | −0.0039 (5) |
C1B | 0.0174 (6) | 0.0177 (7) | 0.0189 (7) | −0.0005 (5) | 0.0038 (5) | −0.0045 (6) |
C2B | 0.0204 (6) | 0.0168 (7) | 0.0214 (7) | 0.0043 (5) | 0.0000 (5) | −0.0050 (6) |
C3B | 0.0205 (6) | 0.0138 (7) | 0.0216 (7) | −0.0006 (5) | −0.0001 (6) | −0.0026 (6) |
C4B | 0.0153 (6) | 0.0150 (6) | 0.0158 (7) | 0.0005 (5) | 0.0015 (5) | −0.0005 (5) |
C5B | 0.0141 (6) | 0.0143 (6) | 0.0136 (6) | 0.0001 (5) | 0.0002 (5) | 0.0007 (5) |
C6B | 0.0138 (6) | 0.0127 (6) | 0.0128 (6) | 0.0006 (5) | −0.0006 (5) | 0.0009 (5) |
O1A | 0.0136 (4) | 0.0144 (5) | 0.0226 (5) | 0.0005 (4) | 0.0006 (4) | 0.0020 (4) |
N1A | 0.0127 (5) | 0.0149 (6) | 0.0161 (6) | 0.0025 (4) | 0.0026 (4) | 0.0001 (5) |
N2A | 0.0113 (5) | 0.0129 (6) | 0.0216 (6) | −0.0004 (4) | 0.0007 (4) | 0.0031 (5) |
N3A | 0.0132 (5) | 0.0153 (6) | 0.0293 (7) | −0.0007 (4) | 0.0001 (5) | 0.0057 (5) |
C1A | 0.0156 (6) | 0.0190 (7) | 0.0175 (7) | 0.0021 (5) | 0.0034 (5) | 0.0042 (6) |
C2A | 0.0193 (7) | 0.0233 (8) | 0.0181 (7) | −0.0014 (6) | 0.0032 (5) | 0.0063 (6) |
C3A | 0.0213 (7) | 0.0185 (7) | 0.0225 (7) | −0.0054 (5) | 0.0013 (6) | 0.0064 (6) |
C4A | 0.0159 (6) | 0.0174 (7) | 0.0195 (7) | −0.0022 (5) | 0.0019 (5) | 0.0022 (6) |
C5A | 0.0149 (6) | 0.0149 (7) | 0.0118 (6) | 0.0005 (5) | 0.0036 (5) | −0.0012 (5) |
C6A | 0.0145 (6) | 0.0143 (7) | 0.0131 (6) | 0.0001 (5) | 0.0039 (5) | −0.0019 (5) |
O1B—C6B | 1.2488 (16) | O1A—C6A | 1.2526 (15) |
N1B—C5B | 1.2806 (17) | N1A—C5A | 1.2811 (18) |
N1B—N2B | 1.3882 (16) | N1A—N2A | 1.3892 (14) |
N2B—C6B | 1.3631 (17) | N2A—C6A | 1.3605 (17) |
N2B—H2N2 | 0.919 (17) | N2A—H1N2 | 0.875 (17) |
N3B—C6B | 1.3385 (17) | N3A—C6A | 1.3394 (17) |
N3B—H3N3 | 0.889 (19) | N3A—H1N3 | 0.860 (18) |
N3B—H4N3 | 0.858 (18) | N3A—H2N3 | 0.926 (19) |
C1B—C5B | 1.5049 (19) | C1A—C5A | 1.5062 (17) |
C1B—C2B | 1.530 (2) | C1A—C2A | 1.529 (2) |
C1B—H1BA | 0.9900 | C1A—H1AA | 0.9900 |
C1B—H1BB | 0.9900 | C1A—H1AB | 0.9900 |
C2B—C3B | 1.533 (2) | C2A—C3A | 1.5300 (18) |
C2B—H2BA | 0.9900 | C2A—H2AA | 0.9900 |
C2B—H2BB | 0.9900 | C2A—H2AB | 0.9900 |
C3B—C4B | 1.5427 (19) | C3A—C4A | 1.541 (2) |
C3B—H3BA | 0.9900 | C3A—H3AA | 0.9900 |
C3B—H3BB | 0.9900 | C3A—H3AB | 0.9900 |
C4B—C5B | 1.5124 (19) | C4A—C5A | 1.5159 (18) |
C4B—H4BA | 0.9900 | C4A—H4AA | 0.9900 |
C4B—H4BB | 0.9900 | C4A—H4AB | 0.9900 |
C5B—N1B—N2B | 116.56 (11) | C5A—N1A—N2A | 116.09 (11) |
C6B—N2B—N1B | 119.17 (11) | C6A—N2A—N1A | 119.94 (11) |
C6B—N2B—H2N2 | 116.7 (11) | C6A—N2A—H1N2 | 117.2 (12) |
N1B—N2B—H2N2 | 124.1 (11) | N1A—N2A—H1N2 | 122.9 (12) |
C6B—N3B—H3N3 | 118.9 (12) | C6A—N3A—H1N3 | 119.9 (12) |
C6B—N3B—H4N3 | 120.1 (12) | C6A—N3A—H2N3 | 118.1 (10) |
H3N3—N3B—H4N3 | 119.6 (16) | H1N3—N3A—H2N3 | 121.9 (16) |
C5B—C1B—C2B | 103.70 (12) | C5A—C1A—C2A | 102.33 (11) |
C5B—C1B—H1BA | 111.0 | C5A—C1A—H1AA | 111.3 |
C2B—C1B—H1BA | 111.0 | C2A—C1A—H1AA | 111.3 |
C5B—C1B—H1BB | 111.0 | C5A—C1A—H1AB | 111.3 |
C2B—C1B—H1BB | 111.0 | C2A—C1A—H1AB | 111.3 |
H1BA—C1B—H1BB | 109.0 | H1AA—C1A—H1AB | 109.2 |
C1B—C2B—C3B | 103.74 (11) | C1A—C2A—C3A | 103.28 (11) |
C1B—C2B—H2BA | 111.0 | C1A—C2A—H2AA | 111.1 |
C3B—C2B—H2BA | 111.0 | C3A—C2A—H2AA | 111.1 |
C1B—C2B—H2BB | 111.0 | C1A—C2A—H2AB | 111.1 |
C3B—C2B—H2BB | 111.0 | C3A—C2A—H2AB | 111.1 |
H2BA—C2B—H2BB | 109.0 | H2AA—C2A—H2AB | 109.1 |
C2B—C3B—C4B | 104.61 (11) | C2A—C3A—C4A | 104.38 (11) |
C2B—C3B—H3BA | 110.8 | C2A—C3A—H3AA | 110.9 |
C4B—C3B—H3BA | 110.8 | C4A—C3A—H3AA | 110.9 |
C2B—C3B—H3BB | 110.8 | C2A—C3A—H3AB | 110.9 |
C4B—C3B—H3BB | 110.8 | C4A—C3A—H3AB | 110.9 |
H3BA—C3B—H3BB | 108.9 | H3AA—C3A—H3AB | 108.9 |
C5B—C4B—C3B | 104.26 (11) | C5A—C4A—C3A | 104.26 (10) |
C5B—C4B—H4BA | 110.9 | C5A—C4A—H4AA | 110.9 |
C3B—C4B—H4BA | 110.9 | C3A—C4A—H4AA | 110.9 |
C5B—C4B—H4BB | 110.9 | C5A—C4A—H4AB | 110.9 |
C3B—C4B—H4BB | 110.9 | C3A—C4A—H4AB | 110.9 |
H4BA—C4B—H4BB | 108.9 | H4AA—C4A—H4AB | 108.9 |
N1B—C5B—C1B | 121.34 (12) | N1A—C5A—C1A | 121.98 (11) |
N1B—C5B—C4B | 128.67 (13) | N1A—C5A—C4A | 128.40 (12) |
C1B—C5B—C4B | 109.97 (11) | C1A—C5A—C4A | 109.46 (11) |
O1B—C6B—N3B | 122.81 (12) | O1A—C6A—N3A | 122.79 (13) |
O1B—C6B—N2B | 119.30 (12) | O1A—C6A—N2A | 118.98 (11) |
N3B—C6B—N2B | 117.89 (12) | N3A—C6A—N2A | 118.24 (12) |
C5B—N1B—N2B—C6B | −177.45 (11) | C5A—N1A—N2A—C6A | 172.46 (13) |
C5B—C1B—C2B—C3B | −34.21 (13) | C5A—C1A—C2A—C3A | 38.89 (14) |
C1B—C2B—C3B—C4B | 36.78 (14) | C1A—C2A—C3A—C4A | −38.43 (15) |
C2B—C3B—C4B—C5B | −24.62 (14) | C2A—C3A—C4A—C5A | 22.39 (15) |
N2B—N1B—C5B—C1B | −177.98 (11) | N2A—N1A—C5A—C1A | −178.43 (12) |
N2B—N1B—C5B—C4B | 4.09 (19) | N2A—N1A—C5A—C4A | −3.6 (2) |
C2B—C1B—C5B—N1B | −158.97 (12) | C2A—C1A—C5A—N1A | 150.21 (13) |
C2B—C1B—C5B—C4B | 19.31 (13) | C2A—C1A—C5A—C4A | −25.50 (15) |
C3B—C4B—C5B—N1B | −178.62 (13) | C3A—C4A—C5A—N1A | −173.30 (14) |
C3B—C4B—C5B—C1B | 3.26 (13) | C3A—C4A—C5A—C1A | 2.06 (15) |
N1B—N2B—C6B—O1B | −176.11 (11) | N1A—N2A—C6A—O1A | −175.88 (12) |
N1B—N2B—C6B—N3B | 3.25 (18) | N1A—N2A—C6A—N3A | 3.7 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2A—H1N2···O1B | 0.875 (17) | 2.048 (17) | 2.9088 (14) | 167.7 (17) |
N3A—H1N3···N1Bi | 0.858 (18) | 2.614 (18) | 3.3214 (16) | 140.5 (16) |
N3A—H2N3···O1Aii | 0.926 (19) | 1.949 (19) | 2.8749 (16) | 178.7 (15) |
N2B—H2N2···O1A | 0.919 (17) | 2.065 (17) | 2.9663 (14) | 166.6 (16) |
N3B—H3N3···O1Biii | 0.889 (19) | 1.980 (19) | 2.8682 (16) | 175.9 (18) |
N3B—H4N3···N1Aiv | 0.858 (17) | 2.515 (17) | 3.1771 (16) | 134.7 (15) |
C1A—H1AB···O1Bv | 0.99 | 2.52 | 3.3923 (18) | 146 |
Symmetry codes: (i) x+1, y, z; (ii) −x+1, −y+1, −z; (iii) −x, −y, −z; (iv) x−1, y, z; (v) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | C6H11N3O |
Mr | 141.18 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 8.9507 (1), 10.7929 (2), 15.0204 (2) |
β (°) | 95.126 (1) |
V (Å3) | 1445.23 (4) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.40 × 0.20 × 0.05 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.964, 0.995 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14322, 4231, 3120 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.705 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.114, 1.00 |
No. of reflections | 4231 |
No. of parameters | 205 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.28, −0.30 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N2A—H1N2···O1B | 0.875 (17) | 2.048 (17) | 2.9088 (14) | 167.7 (17) |
N3A—H1N3···N1Bi | 0.858 (18) | 2.614 (18) | 3.3214 (16) | 140.5 (16) |
N3A—H2N3···O1Aii | 0.926 (19) | 1.949 (19) | 2.8749 (16) | 178.7 (15) |
N2B—H2N2···O1A | 0.919 (17) | 2.065 (17) | 2.9663 (14) | 166.6 (16) |
N3B—H3N3···O1Biii | 0.889 (19) | 1.980 (19) | 2.8682 (16) | 175.9 (18) |
N3B—H4N3···N1Aiv | 0.858 (17) | 2.515 (17) | 3.1771 (16) | 134.7 (15) |
C1A—H1AB···O1Bv | 0.99 | 2.52 | 3.3923 (18) | 146 |
Symmetry codes: (i) x+1, y, z; (ii) −x+1, −y+1, −z; (iii) −x, −y, −z; (iv) x−1, y, z; (v) −x+1, −y, −z. |
Acknowledgements
HKF and WSL thank Universiti Sains Malaysia (USM) for the Research University Grant (1001/PFIZIK/811160). WSL also thanks the Malaysian Government and USM for the post of Research Officer under the Research University Grant (1001/PFIZIK/811160). AMI is thankful to the Board of Research in Nuclear Sciences, Government of India for the Young Scientist award. AMI also thanks the Vision Group on Science & Technology, Government of Karnataka, India for the Best Research Paper award.
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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.
Various semicarbazones, have been known to possess biological activities against many of the most common species of bacteria (Dogan et al., 1999). Semicarbazones are of much interest due to their wide spectrum of antibacterial activities (Pandeya & Dimmock, 1993). Recently some workers reviewed the bioactivity of semicarbazones and they have exhibited anticonvulsant (Pandeya et al., 1998; Yogeeswari et al., 2004) and antitubercular (Sriram et al., 2004) properties. Our previous report highlights the synthesis and crystal structures of the semicarbozones (Fun et al., 2011). In continuation of our studies in this area, we now report the synthesis and structure of the title compound.
The asymmetric unit of the title compound, Fig. 1, consists of two crystallographically independent molecules. The cyclopentane (C1–C5) rings adopt an envelope conformation. The semicarbazone groups (O1/N1–N3/C6) are essentially planar with maximum deviation of 0.0311 (12) Å at atom N2A and 0.0285 (12) Å at atom N2B. Bond lengths and angles are comparable with the related structures (Fun et al. 2009a,b).
In the crystal, Fig. 2, N2A—H1N2···O1B, N3A—H1N3···N1B, N3A—H2N3···O1A, N2B—H2N2···O1A, N3B—H3N3···O1B, N3B—H4N3···N1A and C1A—H1AB···O1B hydrogen bonds (Table 1), link the molecules to form planes parallel to the ab plane.