organic compounds
An amide cyclophane
aCentre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India, and bDepartment of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India
*Correspondence e-mail: shirai2011@gmail.com
The title compound, 8,18-dithia-2,6-diaza-13(1,4)-piperidina-1(1,2),4(1,3),7(1,2)-tribenzenaoctadecaphane-10,15-diyne-3,6-dione, C32H30N4O2S2, is composed of a relatively planar bis(2-mercaptophenyl)isophthalamide unit linked to a bridging 1,4-di(but-2-yn-1-yl)piperazine unit, forming a macrocycle. The isophthalamide ring is inclined to the outer mercaptophenyl rings by 8.18 (11) and 5.59 (10)°, while these two rings are inclined to one another by 9.10 (12)°. The piperazine ring adopts a chair conformation. There are two intramolecular N—H⋯S hydrogen bonds generating S(5) ring motifs. In the crystal, molecules are linked via C—H⋯S and C—H⋯O hydrogen bonds, forming slabs lying parallel to (001). An O atom in the isophthalamide group is disordered over two positions with an occupancy ratio of 0.41 (6):0.59 (6).
Keywords: crystal structure.
CCDC reference: 1012131
Related literature
For the biological activity of piperazine derivatives, see: Fun et al. (2011); Kavitha et al. (2013). For standard bond lengths, see: Allen et al. (1987).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; 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: SHELXL97 and PLATON (Spek, 2009).
Supporting information
CCDC reference: 1012131
10.1107/S1600536814015621/su2737sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536814015621/su2737Isup2.hkl
A mixture of precyclophane diyne (0.2 g, 3.98 mmol), piperazine (0.04 g, 3.98 mmol), formaldehyde (0.02 g, 7.96 mmol) from 37-41% formalin solution and CuCl (0.04 g, 3.98 mmol) in dioxane (30 mL) was refluxed at 363 K for 2 h under a nitrogen atmosphere by the Multi Components Reaction (MCR) technique. After the reaction was complete, the solvent was removed under reduced pressure and the residue was extracted with CHCl3 (3 × 100 mL), washed with water (2 × 100 mL), brine (150 mL) and dried over anhydrous Na2SO4. The solvent was removed and the crude product was purified by
on silica gel using CHCl3/MeOH (24:1) as After purification the piperazinophane was recrystallised in MeOH by slow evaporation yielding block-like colourless crystals.N-bound H atoms were refined with distance restraints: N-H = 0.86 (2) Å with Uiso(H) = 1.2Ueq(N). The C-bound H atoms were positioned geometrically (C–H = 0.93–0.97 Å) and allowed to ride on their parent atoms, with Uiso(H) = 1.5Ueq(C-methyl) and = 1.2Ueq(C) for other H atoms. In the isophthalamide group atom O2 is disordered over two positions with an occupancy ratio of 0.41 (6):0.59 (6).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); 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: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title molecule, with atom labelling. Displacement ellipsoids are drawn at the 50% probability level. The intramolecular N-H···S hydrogen bonds are shown as dashed lines (see Table 1 for details). | |
Fig. 2. A partial view of the crystal packing of the title compound. Hydrogen bonds are shown as dashed lines (see Table 1 for details; H-atoms not involved in hydrogen bonding have been omitted for clarity). |
C32H30N4O2S2 | F(000) = 2384 |
Mr = 566.72 | Dx = 1.280 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 7294 reflections |
a = 23.0760 (5) Å | θ = 1.6–28.3° |
b = 9.9380 (3) Å | µ = 0.22 mm−1 |
c = 27.0341 (7) Å | T = 293 K |
β = 108.428 (2)° | Block, colourless |
V = 5881.8 (3) Å3 | 0.30 × 0.25 × 0.20 mm |
Z = 8 |
Bruker SMART APEXII area-detector diffractometer | 7294 independent reflections |
Radiation source: fine-focus sealed tube | 4040 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.036 |
ω and ϕ scans | θmax = 28.3°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −30→30 |
Tmin = 0.380, Tmax = 0.745 | k = −13→13 |
27488 measured reflections | l = −34→35 |
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)] = 0.042 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0438P)2 + 2.0132P] where P = (Fo2 + 2Fc2)/3 |
7294 reflections | (Δ/σ)max = 0.001 |
377 parameters | Δρmax = 0.20 e Å−3 |
2 restraints | Δρmin = −0.23 e Å−3 |
C32H30N4O2S2 | V = 5881.8 (3) Å3 |
Mr = 566.72 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 23.0760 (5) Å | µ = 0.22 mm−1 |
b = 9.9380 (3) Å | T = 293 K |
c = 27.0341 (7) Å | 0.30 × 0.25 × 0.20 mm |
β = 108.428 (2)° |
Bruker SMART APEXII area-detector diffractometer | 7294 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 4040 reflections with I > 2σ(I) |
Tmin = 0.380, Tmax = 0.745 | Rint = 0.036 |
27488 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | 2 restraints |
wR(F2) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | Δρmax = 0.20 e Å−3 |
7294 reflections | Δρmin = −0.23 e Å−3 |
377 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | Occ. (<1) | |
S1 | 0.41059 (2) | 0.21672 (6) | 1.01916 (2) | 0.06329 (16) | |
S2 | 0.58670 (2) | 0.64936 (6) | 0.76454 (2) | 0.06810 (17) | |
O1 | 0.47117 (6) | 0.54558 (14) | 0.89655 (5) | 0.0671 (4) | |
O2A | 0.7513 (7) | 0.440 (3) | 0.9253 (10) | 0.108 (5) | 0.41 (6) |
O2B | 0.7544 (4) | 0.482 (3) | 0.9314 (5) | 0.115 (4) | 0.59 (6) |
N1 | 0.57053 (7) | 0.08419 (16) | 0.81521 (6) | 0.0584 (4) | |
N2 | 0.45152 (7) | 0.37111 (18) | 0.94254 (7) | 0.0634 (5) | |
H2A | 0.4674 (9) | 0.3112 (19) | 0.9642 (8) | 0.076* | |
N3 | 0.67548 (7) | 0.5408 (2) | 0.86248 (7) | 0.0650 (5) | |
H3A | 0.6377 (7) | 0.544 (2) | 0.8508 (8) | 0.078* | |
N4 | 0.50216 (7) | −0.03836 (15) | 0.87441 (6) | 0.0541 (4) | |
C1 | 0.66745 (9) | 0.6485 (2) | 0.78117 (9) | 0.0625 (5) | |
C2 | 0.69417 (11) | 0.7074 (3) | 0.74746 (11) | 0.0866 (7) | |
H2 | 0.6695 | 0.7458 | 0.7166 | 0.104* | |
C3 | 0.75672 (13) | 0.7100 (3) | 0.75881 (13) | 0.1039 (9) | |
H3 | 0.7744 | 0.7507 | 0.7361 | 0.125* | |
C4 | 0.79235 (11) | 0.6519 (3) | 0.80401 (13) | 0.0995 (9) | |
H4 | 0.8346 | 0.6519 | 0.8115 | 0.119* | |
C5 | 0.76738 (10) | 0.5931 (3) | 0.83875 (10) | 0.0825 (7) | |
H5 | 0.7925 | 0.5540 | 0.8693 | 0.099* | |
C6 | 0.70420 (8) | 0.5926 (2) | 0.82788 (9) | 0.0618 (5) | |
C7 | 0.69931 (9) | 0.4820 (2) | 0.90941 (9) | 0.0660 (6) | |
C8 | 0.65534 (8) | 0.43753 (18) | 0.93660 (8) | 0.0536 (5) | |
C9 | 0.67931 (9) | 0.3618 (2) | 0.98150 (9) | 0.0657 (6) | |
H9 | 0.7211 | 0.3448 | 0.9937 | 0.079* | |
C10 | 0.64258 (10) | 0.3116 (2) | 1.00816 (9) | 0.0709 (6) | |
H10 | 0.6594 | 0.2596 | 1.0379 | 0.085* | |
C11 | 0.58065 (9) | 0.3380 (2) | 0.99107 (8) | 0.0622 (5) | |
H11 | 0.5558 | 0.3034 | 1.0092 | 0.075* | |
C12 | 0.55554 (8) | 0.41599 (17) | 0.94693 (7) | 0.0484 (4) | |
C13 | 0.59316 (8) | 0.46595 (18) | 0.92026 (7) | 0.0497 (4) | |
H13 | 0.5766 | 0.5194 | 0.8909 | 0.060* | |
C14 | 0.48890 (8) | 0.45151 (19) | 0.92630 (7) | 0.0517 (4) | |
C15 | 0.38767 (8) | 0.3776 (2) | 0.93183 (8) | 0.0578 (5) | |
C16 | 0.34978 (10) | 0.4520 (2) | 0.89092 (9) | 0.0770 (7) | |
H16 | 0.3663 | 0.5021 | 0.8696 | 0.092* | |
C17 | 0.28782 (11) | 0.4512 (3) | 0.88210 (11) | 0.0917 (8) | |
H17 | 0.2625 | 0.5006 | 0.8545 | 0.110* | |
C18 | 0.26290 (11) | 0.3792 (3) | 0.91326 (12) | 0.0942 (8) | |
H18 | 0.2209 | 0.3793 | 0.9068 | 0.113* | |
C19 | 0.30033 (10) | 0.3061 (2) | 0.95441 (10) | 0.0763 (6) | |
H19 | 0.2834 | 0.2577 | 0.9759 | 0.092* | |
C20 | 0.36274 (8) | 0.3043 (2) | 0.96403 (8) | 0.0575 (5) | |
C21 | 0.39422 (9) | 0.0419 (2) | 1.00030 (8) | 0.0623 (5) | |
H21A | 0.4140 | −0.0144 | 1.0302 | 0.075* | |
H21B | 0.3505 | 0.0277 | 0.9915 | 0.075* | |
C22 | 0.41344 (9) | −0.0032 (2) | 0.95642 (9) | 0.0573 (5) | |
C23 | 0.42885 (9) | −0.0462 (2) | 0.92174 (9) | 0.0590 (5) | |
C24 | 0.44899 (10) | −0.1063 (2) | 0.88040 (8) | 0.0651 (5) | |
H24A | 0.4587 | −0.2003 | 0.8884 | 0.078* | |
H24B | 0.4158 | −0.1020 | 0.8477 | 0.078* | |
C25 | 0.53008 (10) | −0.1175 (2) | 0.84244 (9) | 0.0685 (6) | |
H25A | 0.5012 | −0.1287 | 0.8077 | 0.082* | |
H25B | 0.5408 | −0.2061 | 0.8577 | 0.082* | |
C26 | 0.58637 (10) | −0.0470 (2) | 0.83922 (9) | 0.0695 (6) | |
H26A | 0.6153 | −0.0366 | 0.8739 | 0.083* | |
H26B | 0.6056 | −0.1007 | 0.8188 | 0.083* | |
C27 | 0.48647 (9) | 0.0944 (2) | 0.85116 (9) | 0.0638 (5) | |
H27A | 0.4686 | 0.1480 | 0.8726 | 0.077* | |
H27B | 0.4564 | 0.0854 | 0.8169 | 0.077* | |
C28 | 0.54223 (9) | 0.1640 (2) | 0.84643 (9) | 0.0648 (6) | |
H28A | 0.5309 | 0.2514 | 0.8303 | 0.078* | |
H28B | 0.5713 | 0.1779 | 0.8809 | 0.078* | |
C29 | 0.62297 (9) | 0.1516 (2) | 0.80817 (9) | 0.0725 (6) | |
H29A | 0.6431 | 0.0916 | 0.7905 | 0.087* | |
H29B | 0.6518 | 0.1733 | 0.8420 | 0.087* | |
C30 | 0.60525 (10) | 0.2749 (3) | 0.77769 (9) | 0.0668 (6) | |
C31 | 0.58869 (9) | 0.3744 (3) | 0.75342 (9) | 0.0651 (6) | |
C32 | 0.56795 (10) | 0.4989 (2) | 0.72467 (8) | 0.0748 (6) | |
H32A | 0.5240 | 0.4946 | 0.7086 | 0.090* | |
H32B | 0.5861 | 0.5057 | 0.6969 | 0.090* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0621 (3) | 0.0687 (3) | 0.0562 (3) | −0.0058 (3) | 0.0146 (2) | 0.0010 (3) |
S2 | 0.0538 (3) | 0.0752 (4) | 0.0786 (4) | 0.0148 (3) | 0.0256 (3) | 0.0111 (3) |
O1 | 0.0593 (8) | 0.0693 (9) | 0.0674 (9) | 0.0087 (7) | 0.0123 (7) | 0.0201 (8) |
O2A | 0.035 (5) | 0.131 (11) | 0.160 (10) | 0.023 (6) | 0.032 (6) | 0.061 (7) |
O2B | 0.050 (3) | 0.167 (9) | 0.104 (5) | −0.038 (5) | −0.010 (3) | 0.051 (5) |
N1 | 0.0518 (9) | 0.0574 (10) | 0.0665 (11) | 0.0045 (8) | 0.0195 (8) | −0.0074 (8) |
N2 | 0.0491 (9) | 0.0689 (12) | 0.0744 (12) | 0.0115 (8) | 0.0229 (9) | 0.0232 (9) |
N3 | 0.0378 (8) | 0.0918 (13) | 0.0638 (11) | −0.0020 (9) | 0.0140 (8) | 0.0025 (10) |
N4 | 0.0568 (9) | 0.0477 (9) | 0.0555 (10) | 0.0057 (7) | 0.0146 (8) | −0.0030 (8) |
C1 | 0.0536 (11) | 0.0650 (13) | 0.0762 (15) | 0.0019 (10) | 0.0308 (11) | −0.0003 (11) |
C2 | 0.0780 (16) | 0.1015 (19) | 0.0924 (18) | 0.0038 (14) | 0.0444 (14) | 0.0149 (15) |
C3 | 0.0777 (18) | 0.134 (3) | 0.118 (2) | −0.0075 (17) | 0.0565 (18) | 0.016 (2) |
C4 | 0.0535 (14) | 0.137 (3) | 0.119 (2) | −0.0141 (15) | 0.0430 (16) | −0.006 (2) |
C5 | 0.0482 (12) | 0.114 (2) | 0.0867 (17) | −0.0087 (13) | 0.0239 (12) | −0.0074 (15) |
C6 | 0.0466 (11) | 0.0719 (13) | 0.0715 (14) | −0.0064 (10) | 0.0250 (10) | −0.0109 (11) |
C7 | 0.0454 (11) | 0.0712 (14) | 0.0750 (15) | −0.0064 (11) | 0.0098 (11) | 0.0034 (12) |
C8 | 0.0461 (10) | 0.0476 (10) | 0.0620 (12) | −0.0014 (8) | 0.0101 (9) | −0.0022 (9) |
C9 | 0.0483 (11) | 0.0615 (13) | 0.0798 (15) | 0.0079 (10) | 0.0094 (10) | 0.0108 (11) |
C10 | 0.0644 (13) | 0.0672 (14) | 0.0718 (15) | 0.0120 (11) | 0.0082 (11) | 0.0211 (11) |
C11 | 0.0606 (12) | 0.0617 (12) | 0.0640 (13) | 0.0072 (10) | 0.0194 (10) | 0.0130 (10) |
C12 | 0.0501 (10) | 0.0419 (10) | 0.0515 (11) | 0.0050 (8) | 0.0138 (9) | −0.0006 (8) |
C13 | 0.0491 (10) | 0.0452 (10) | 0.0500 (11) | −0.0003 (8) | 0.0087 (8) | −0.0014 (8) |
C14 | 0.0541 (11) | 0.0515 (11) | 0.0490 (11) | 0.0065 (9) | 0.0156 (9) | −0.0003 (9) |
C15 | 0.0459 (10) | 0.0674 (13) | 0.0605 (12) | 0.0093 (9) | 0.0176 (9) | 0.0024 (10) |
C16 | 0.0611 (13) | 0.0964 (17) | 0.0723 (15) | 0.0196 (12) | 0.0192 (11) | 0.0208 (13) |
C17 | 0.0590 (14) | 0.116 (2) | 0.0890 (18) | 0.0270 (14) | 0.0080 (13) | 0.0195 (17) |
C18 | 0.0475 (13) | 0.118 (2) | 0.112 (2) | 0.0165 (14) | 0.0184 (14) | 0.0008 (18) |
C19 | 0.0549 (13) | 0.0916 (17) | 0.0885 (17) | 0.0025 (12) | 0.0313 (12) | −0.0010 (14) |
C20 | 0.0491 (10) | 0.0642 (12) | 0.0596 (12) | 0.0033 (9) | 0.0176 (9) | −0.0051 (10) |
C21 | 0.0569 (12) | 0.0657 (13) | 0.0643 (13) | −0.0067 (10) | 0.0192 (10) | 0.0061 (11) |
C22 | 0.0478 (11) | 0.0565 (12) | 0.0624 (13) | −0.0020 (9) | 0.0101 (10) | 0.0099 (10) |
C23 | 0.0534 (11) | 0.0564 (12) | 0.0627 (14) | −0.0017 (9) | 0.0117 (10) | 0.0056 (11) |
C24 | 0.0688 (13) | 0.0605 (13) | 0.0627 (13) | −0.0048 (11) | 0.0159 (11) | −0.0036 (11) |
C25 | 0.0812 (15) | 0.0525 (12) | 0.0730 (15) | 0.0038 (11) | 0.0259 (12) | −0.0107 (11) |
C26 | 0.0676 (13) | 0.0595 (13) | 0.0838 (16) | 0.0143 (11) | 0.0274 (12) | −0.0113 (12) |
C27 | 0.0598 (12) | 0.0596 (12) | 0.0746 (14) | 0.0140 (10) | 0.0249 (11) | 0.0068 (11) |
C28 | 0.0679 (13) | 0.0508 (11) | 0.0794 (15) | 0.0084 (10) | 0.0287 (11) | −0.0017 (11) |
C29 | 0.0562 (12) | 0.0752 (15) | 0.0877 (17) | 0.0028 (11) | 0.0252 (12) | −0.0067 (13) |
C30 | 0.0542 (12) | 0.0773 (16) | 0.0728 (15) | −0.0072 (12) | 0.0257 (11) | −0.0155 (13) |
C31 | 0.0503 (12) | 0.0834 (17) | 0.0638 (14) | −0.0069 (12) | 0.0213 (10) | −0.0138 (13) |
C32 | 0.0618 (13) | 0.1047 (18) | 0.0559 (13) | −0.0025 (12) | 0.0157 (11) | 0.0029 (13) |
S1—C20 | 1.777 (2) | C12—C13 | 1.384 (3) |
S1—C21 | 1.817 (2) | C12—C14 | 1.503 (2) |
S2—C1 | 1.773 (2) | C13—H13 | 0.9300 |
S2—C32 | 1.814 (2) | C15—C16 | 1.387 (3) |
O1—C14 | 1.217 (2) | C15—C20 | 1.391 (3) |
O2A—C7 | 1.215 (11) | C16—C17 | 1.373 (3) |
O2B—C7 | 1.222 (9) | C16—H16 | 0.9300 |
N1—C29 | 1.448 (3) | C17—C18 | 1.363 (4) |
N1—C26 | 1.451 (3) | C17—H17 | 0.9300 |
N1—C28 | 1.454 (2) | C18—C19 | 1.380 (3) |
N2—C14 | 1.347 (2) | C18—H18 | 0.9300 |
N2—C15 | 1.411 (2) | C19—C20 | 1.380 (3) |
N2—H2A | 0.833 (15) | C19—H19 | 0.9300 |
N3—C7 | 1.346 (3) | C21—C22 | 1.462 (3) |
N3—C6 | 1.404 (3) | C21—H21A | 0.9700 |
N3—H3A | 0.828 (15) | C21—H21B | 0.9700 |
N4—C24 | 1.454 (3) | C22—C23 | 1.183 (3) |
N4—C27 | 1.457 (2) | C23—C24 | 1.466 (3) |
N4—C25 | 1.461 (2) | C24—H24A | 0.9700 |
C1—C2 | 1.382 (3) | C24—H24B | 0.9700 |
C1—C6 | 1.395 (3) | C25—C26 | 1.503 (3) |
C2—C3 | 1.378 (3) | C25—H25A | 0.9700 |
C2—H2 | 0.9300 | C25—H25B | 0.9700 |
C3—C4 | 1.367 (4) | C26—H26A | 0.9700 |
C3—H3 | 0.9300 | C26—H26B | 0.9700 |
C4—C5 | 1.378 (4) | C27—C28 | 1.502 (3) |
C4—H4 | 0.9300 | C27—H27A | 0.9700 |
C5—C6 | 1.393 (3) | C27—H27B | 0.9700 |
C5—H5 | 0.9300 | C28—H28A | 0.9700 |
C7—C8 | 1.496 (3) | C28—H28B | 0.9700 |
C8—C9 | 1.386 (3) | C29—C30 | 1.461 (3) |
C8—C13 | 1.390 (2) | C29—H29A | 0.9700 |
C9—C10 | 1.369 (3) | C29—H29B | 0.9700 |
C9—H9 | 0.9300 | C30—C31 | 1.181 (3) |
C10—C11 | 1.381 (3) | C31—C32 | 1.459 (3) |
C10—H10 | 0.9300 | C32—H32A | 0.9700 |
C11—C12 | 1.387 (3) | C32—H32B | 0.9700 |
C11—H11 | 0.9300 | ||
C20—S1—C21 | 102.37 (10) | C18—C17—C16 | 121.0 (2) |
C1—S2—C32 | 100.43 (10) | C18—C17—H17 | 119.5 |
C29—N1—C26 | 111.83 (16) | C16—C17—H17 | 119.5 |
C29—N1—C28 | 111.80 (16) | C17—C18—C19 | 119.7 (2) |
C26—N1—C28 | 109.05 (16) | C17—C18—H18 | 120.1 |
C14—N2—C15 | 129.86 (17) | C19—C18—H18 | 120.1 |
C14—N2—H2A | 117.9 (15) | C18—C19—C20 | 120.6 (2) |
C15—N2—H2A | 112.1 (15) | C18—C19—H19 | 119.7 |
C7—N3—C6 | 130.45 (17) | C20—C19—H19 | 119.7 |
C7—N3—H3A | 116.3 (16) | C19—C20—C15 | 119.24 (19) |
C6—N3—H3A | 113.1 (16) | C19—C20—S1 | 119.93 (17) |
C24—N4—C27 | 111.41 (15) | C15—C20—S1 | 120.74 (14) |
C24—N4—C25 | 111.20 (15) | C22—C21—S1 | 115.54 (14) |
C27—N4—C25 | 109.16 (16) | C22—C21—H21A | 108.4 |
C2—C1—C6 | 119.7 (2) | S1—C21—H21A | 108.4 |
C2—C1—S2 | 118.89 (18) | C22—C21—H21B | 108.4 |
C6—C1—S2 | 121.39 (15) | S1—C21—H21B | 108.4 |
C3—C2—C1 | 121.1 (3) | H21A—C21—H21B | 107.5 |
C3—C2—H2 | 119.5 | C23—C22—C21 | 176.6 (2) |
C1—C2—H2 | 119.5 | C22—C23—C24 | 176.9 (2) |
C4—C3—C2 | 118.9 (2) | N4—C24—C23 | 112.22 (16) |
C4—C3—H3 | 120.6 | N4—C24—H24A | 109.2 |
C2—C3—H3 | 120.6 | C23—C24—H24A | 109.2 |
C3—C4—C5 | 121.7 (2) | N4—C24—H24B | 109.2 |
C3—C4—H4 | 119.1 | C23—C24—H24B | 109.2 |
C5—C4—H4 | 119.1 | H24A—C24—H24B | 107.9 |
C4—C5—C6 | 119.5 (2) | N4—C25—C26 | 109.52 (16) |
C4—C5—H5 | 120.2 | N4—C25—H25A | 109.8 |
C6—C5—H5 | 120.2 | C26—C25—H25A | 109.8 |
C5—C6—C1 | 119.1 (2) | N4—C25—H25B | 109.8 |
C5—C6—N3 | 122.9 (2) | C26—C25—H25B | 109.8 |
C1—C6—N3 | 117.99 (17) | H25A—C25—H25B | 108.2 |
O2A—C7—N3 | 123.2 (9) | N1—C26—C25 | 110.17 (17) |
O2B—C7—N3 | 120.8 (7) | N1—C26—H26A | 109.6 |
O2A—C7—C8 | 118.2 (9) | C25—C26—H26A | 109.6 |
O2B—C7—C8 | 121.5 (6) | N1—C26—H26B | 109.6 |
N3—C7—C8 | 116.93 (17) | C25—C26—H26B | 109.6 |
C9—C8—C13 | 118.33 (18) | H26A—C26—H26B | 108.1 |
C9—C8—C7 | 116.48 (17) | N4—C27—C28 | 110.57 (16) |
C13—C8—C7 | 125.19 (18) | N4—C27—H27A | 109.5 |
C10—C9—C8 | 121.13 (19) | C28—C27—H27A | 109.5 |
C10—C9—H9 | 119.4 | N4—C27—H27B | 109.5 |
C8—C9—H9 | 119.4 | C28—C27—H27B | 109.5 |
C9—C10—C11 | 120.15 (19) | H27A—C27—H27B | 108.1 |
C9—C10—H10 | 119.9 | N1—C28—C27 | 110.61 (17) |
C11—C10—H10 | 119.9 | N1—C28—H28A | 109.5 |
C10—C11—C12 | 120.04 (19) | C27—C28—H28A | 109.5 |
C10—C11—H11 | 120.0 | N1—C28—H28B | 109.5 |
C12—C11—H11 | 120.0 | C27—C28—H28B | 109.5 |
C13—C12—C11 | 119.24 (17) | H28A—C28—H28B | 108.1 |
C13—C12—C14 | 117.33 (16) | N1—C29—C30 | 111.46 (17) |
C11—C12—C14 | 123.43 (17) | N1—C29—H29A | 109.3 |
C12—C13—C8 | 121.06 (17) | C30—C29—H29A | 109.3 |
C12—C13—H13 | 119.5 | N1—C29—H29B | 109.3 |
C8—C13—H13 | 119.5 | C30—C29—H29B | 109.3 |
O1—C14—N2 | 123.71 (18) | H29A—C29—H29B | 108.0 |
O1—C14—C12 | 121.12 (18) | C31—C30—C29 | 177.3 (2) |
N2—C14—C12 | 115.16 (16) | C30—C31—C32 | 178.5 (2) |
C16—C15—C20 | 119.81 (18) | C31—C32—S2 | 113.96 (15) |
C16—C15—N2 | 122.85 (19) | C31—C32—H32A | 108.8 |
C20—C15—N2 | 117.34 (17) | S2—C32—H32A | 108.8 |
C17—C16—C15 | 119.7 (2) | C31—C32—H32B | 108.8 |
C17—C16—H16 | 120.2 | S2—C32—H32B | 108.8 |
C15—C16—H16 | 120.2 | H32A—C32—H32B | 107.7 |
C32—S2—C1—C2 | 86.2 (2) | C13—C12—C14—O1 | −18.3 (3) |
C32—S2—C1—C6 | −95.30 (19) | C11—C12—C14—O1 | 160.92 (19) |
C6—C1—C2—C3 | 1.0 (4) | C13—C12—C14—N2 | 160.74 (17) |
S2—C1—C2—C3 | 179.6 (2) | C11—C12—C14—N2 | −20.0 (3) |
C1—C2—C3—C4 | 0.7 (4) | C14—N2—C15—C16 | 17.0 (3) |
C2—C3—C4—C5 | −1.2 (5) | C14—N2—C15—C20 | −163.6 (2) |
C3—C4—C5—C6 | −0.1 (4) | C20—C15—C16—C17 | −0.8 (3) |
C4—C5—C6—C1 | 1.8 (4) | N2—C15—C16—C17 | 178.5 (2) |
C4—C5—C6—N3 | −176.7 (2) | C15—C16—C17—C18 | 0.5 (4) |
C2—C1—C6—C5 | −2.2 (3) | C16—C17—C18—C19 | 0.2 (4) |
S2—C1—C6—C5 | 179.22 (17) | C17—C18—C19—C20 | −0.6 (4) |
C2—C1—C6—N3 | 176.3 (2) | C18—C19—C20—C15 | 0.3 (3) |
S2—C1—C6—N3 | −2.2 (3) | C18—C19—C20—S1 | 176.77 (19) |
C7—N3—C6—C5 | −1.6 (4) | C16—C15—C20—C19 | 0.4 (3) |
C7—N3—C6—C1 | 179.9 (2) | N2—C15—C20—C19 | −178.96 (19) |
C6—N3—C7—O2A | −15 (2) | C16—C15—C20—S1 | −176.02 (17) |
C6—N3—C7—O2B | 9.3 (15) | N2—C15—C20—S1 | 4.6 (3) |
C6—N3—C7—C8 | 180.0 (2) | C21—S1—C20—C19 | 72.16 (19) |
O2A—C7—C8—C9 | 6 (2) | C21—S1—C20—C15 | −111.40 (17) |
O2B—C7—C8—C9 | −17.5 (15) | C20—S1—C21—C22 | 66.21 (17) |
N3—C7—C8—C9 | 171.90 (19) | C27—N4—C24—C23 | −71.5 (2) |
O2A—C7—C8—C13 | −173 (2) | C25—N4—C24—C23 | 166.44 (17) |
O2B—C7—C8—C13 | 162.6 (15) | C24—N4—C25—C26 | −177.46 (17) |
N3—C7—C8—C13 | −7.9 (3) | C27—N4—C25—C26 | 59.2 (2) |
C13—C8—C9—C10 | 2.5 (3) | C29—N1—C26—C25 | −176.08 (18) |
C7—C8—C9—C10 | −177.4 (2) | C28—N1—C26—C25 | 59.8 (2) |
C8—C9—C10—C11 | −1.2 (3) | N4—C25—C26—N1 | −60.9 (2) |
C9—C10—C11—C12 | −0.3 (3) | C24—N4—C27—C28 | 178.72 (17) |
C10—C11—C12—C13 | 0.4 (3) | C25—N4—C27—C28 | −58.1 (2) |
C10—C11—C12—C14 | −178.84 (18) | C29—N1—C28—C27 | 177.58 (17) |
C11—C12—C13—C8 | 1.0 (3) | C26—N1—C28—C27 | −58.2 (2) |
C14—C12—C13—C8 | −179.76 (16) | N4—C27—C28—N1 | 58.1 (2) |
C9—C8—C13—C12 | −2.4 (3) | C26—N1—C29—C30 | 172.24 (18) |
C7—C8—C13—C12 | 177.49 (18) | C28—N1—C29—C30 | −65.2 (2) |
C15—N2—C14—O1 | −2.6 (3) | C1—S2—C32—C31 | 66.79 (18) |
C15—N2—C14—C12 | 178.37 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···S1 | 0.83 (2) | 2.46 (2) | 2.9621 (18) | 120 (2) |
N3—H3A···S2 | 0.83 (2) | 2.49 (2) | 2.9905 (19) | 120 (2) |
C21—H21B···O2Ai | 0.97 | 2.57 | 3.43 (3) | 148 |
C21—H21B···O2Bi | 0.97 | 2.34 | 3.230 (11) | 152 |
C24—H24A···O1ii | 0.97 | 2.54 | 3.505 (3) | 171 |
C26—H26B···S2ii | 0.97 | 2.85 | 3.632 (2) | 139 |
C32—H32B···O1iii | 0.97 | 2.49 | 3.146 (3) | 125 |
Symmetry codes: (i) x−1/2, y−1/2, z; (ii) x, y−1, z; (iii) −x+1, y, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···S1 | 0.833 (15) | 2.46 (2) | 2.9621 (18) | 119.8 (18) |
N3—H3A···S2 | 0.828 (15) | 2.49 (2) | 2.9905 (19) | 120.2 (18) |
C21—H21B···O2Ai | 0.97 | 2.57 | 3.43 (3) | 148 |
C21—H21B···O2Bi | 0.97 | 2.34 | 3.230 (11) | 152 |
C24—H24A···O1ii | 0.97 | 2.54 | 3.505 (3) | 171 |
C26—H26B···S2ii | 0.97 | 2.85 | 3.632 (2) | 139 |
C32—H32B···O1iii | 0.97 | 2.49 | 3.146 (3) | 125 |
Symmetry codes: (i) x−1/2, y−1/2, z; (ii) x, y−1, z; (iii) −x+1, y, −z+3/2. |
Acknowledgements
The authors thank the TBI X-ray facility, CAS in Crystallography and Biophysics, University of Madras, India, for the data collection.
References
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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.
Piperazine derivatives are popular in organic synthesis and for their applications in biology and medicine. They are known to exhibit antibacterial and antimicrobial activities (Fun et al., 2011). They are also amongst the most important building blocks found in biologically active compounds in a number of different therapeutic areas and a review about the current pharmacological and toxicological information for piperazine derivatives is available (Kavitha et al., 2013).
The molecular structure of the title molecule is shown in Fig. 1. It is composed of a relatively planar bis(2-mercaptophenyl)isophthalamide moiety linked to a bridging 1,4-di(but-2-yn-1-yl)piperazine unit forming a macrocycle. The isophthalamide ring (C8-C13) is inclined to the outer mercaptophenyl rings (C1-C6 and C15-C20) by 8.18 (11) and 5.59 (10) °, respectively. The two mercaptophenyl rings (C1-C6 and C15-C20) are inclined to one another by 9.10 (12) °. The S2–C1 and S1–C20 bond lengths are 1.773 (2) Å and 1.777 (2) Å, respectively, similar to the standard value of 1.769 (9) Å (Allen et al., 1987). There are two intramolecular N—H···S hydrogen bonds generating S(5) ring motifs (Fig. 1 and Table 1).
The but-2-yne group is linear and connects the piperazine group to the bis(2-mercaptophenyl)isophthalamide moiety. The piperazine ring (N1/N4/C25-C28) adopts a chair conformation.
In the crystal, molecules are linked via C—H···S and C—H···O hydrogen bonds forming slabs lying parallel to (001); see Table 1 and Fig. 2.