The crystal structure of the racemic alkaloid (dl)-corynoloxine (1), 5b,6,7,12b,13,14-hexahydro-5b,13-dimethyl-6,14-epoxy-1,3-dioxolo[4,5-i][1,3]dioxolo[4,5]benzo[1,2-c]phenanthridine, is reported here. The crystal is orthorhombic, space group Pbca with a = 20.375(3)Å, b = 41.499(3)Å, c = 8.139(3)Å, and Z = 16. The crystal contains two crystallographically independent molecules. These two molecules take essentially the same conformation.

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The crystal of the title antihypertension agent, C₉H₉Cl₂N₃O·HCl, belongs to space group Pbcn with the cell dimensions a = 14.439(3), b = 8.366(2), and c = 39.656(8)Å. The final R value is 0.064. Two crystallographically independent molecules take different conformations. Both structures are non-planar, the dihedral angles between the phenyl rings and the least-squares planes defined by the guanidine moieties are 92.4(4) and 74.9(4)°. There are strong intramolecular N-H…O hydrogen bonds in both molecules.

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Accurate molecular parameters for the tricyclic system in the compound ethyl 3-(4-chlorobenzoyl)pyrrolo[1,2-c]-quinazoline-1-carboxylate have been determined by X-ray analysis. The compound crystallizes in the triclinic system, space group P1 with a = 8.1761(4)Å, b = 9.2255(4)Å, c = 11.5258(4)Å, α = 92.014(3)°, β = 90.871(3)°, γ = 99.323(2)°, V = 857.17(6)ų and Z = 2. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to final values of R1 = 0.0375 and wR2 = 0.0917.

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A new dinucleating ligand, 1,4-di(1,4,7-triazonan-1-yl)butan-2-ol (L-OH), was synthesized, and a dinuclear Cu(II) complex was prepared and characterized by X-ray crystallography. The compound crystallized in a monoclinic system, and was characterized thus: P2₁, a = 9.808(9), b = 14.308(13), c = 10.951(10)Å, β = 103.075(15)°, Z = 2, V = 1497(2)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to final values of R1 = 0.0823 and wR2 = 0.2051.

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The title compound 3 was prepared for the first time and its crystal structure has been determined. This macrocycle crystallizes in the monoclinic space group P2₁/a with a = 10.105(2), b = 20.061(3), c = 11.213(3)Å, β = 107.83(2)°, V = 2163.8(8)ų and Z = 4. The asymmetric unit comprises one molecule of 3 together with one molecule of MeCN as a packing solvent.

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A new mixed potassium dysprosium diphosphate, KDyP₂O₇·2H₂O, has been prepared via a soft chemistry route. It crystallizes in monoclinic, P2₁/c, cell dimensions: a = 7.7133(7)Å, b = 10.5873(3)Å, c = 10.0548(3)Å, β = 93.28(9)° and Z = 4. The 3D open framework is built from [DyO₇] polyhedra sharing corners with [P₂O₇] groups. The structure exhibit open channels running through the monoclinic cell along two directions [100] and [001], in which the water molecules and the K⁺ ions are located.

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The crystal structure of a pale-yellow complex [(Ph₃PCHC(O)C₆H₄Cl)·HgI₂·DMSO] was determined by the X-ray diffraction method. All atoms occupy general positions in the monoclinic space group, P2₁/c and have the following unit-cell dimensions: a = 15.5243(7)Å, b = 10.0196(5)Å, c = 20.0731(10)Å, β = 100.292(4)°, Z = 4 and V = 3072.1(3)ų.

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The title compound, DL-histidinium perchlorate, (C₅H₁₀N₃O₂)⁺·ClO₄^-, crystallizes in the orthorhombic space group, Pbca, with a = 9.5281(6)Å, b = 9.7227(9)Å, c = 20.5794(12)Å and Z = 8. The asymmetric part of the unit cell contains a diprotonated monovalent histidinium cation and a perchlorate anion. The amino N atom deviates from the plane of the carboxylate group. Two parallel and opposite chain C(5) motifs run along the b-axis of the unit cell, generated through N-H…O hydrogen bonds. It consists of another chain C₂¹(4) motif. Anions contribute to an extensive three-dimensional hydrogen bonding network, leading to the chain C(8) and C₁²(4) motifs. These chain motifs make parallel molecular aggregations along z = 1/4 and 3/4.

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The structure of N ′-(2-acetyl-3-methylpyrazine)-4-toluenesulfonylhydrazide was determined by X-ray crystallography. The compound crystallized in a monoclinic system, and was characterized thus: P 2₁, a = 7.1172(16), b = 15.099(2), c = 7.5965(18)Å, β = 97.261(2)°, Z = 2, V = 809.8(3)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F ² to final values of R 1 = 0.0302 and wR 2 = 0.0762.

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The title compound, C₁₄H₁₆FN₅O₃, was synthesized and the structure was investigated by X-ray crystallography. It crystallizes in the triclinic system, space group P1 with a = 7.9062(9)Å, b = 10.4189(12)Å, c = 10.5347(12)Å, α = 62.983(2)°, β = 70.570(2)°, γ = 76.828(3)°, V = 726.01(14)ų, Z = 2, R = 0.0494. The crystal structure is stabilized by intermolecular N-H…O hydrogen bonds and a π-π stacking interaction between the quinolone rings.

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The crystal structure of tetraacetyl fluorescein hydrazide (FHTA) was determined by X-ray diffraction. This compound crystallized in the monoclinic, space group P2₁/n with a = 8.889(2)Å, b = 14.379(3)Å, c = 19.920(5)Å, β = 96.629(4)°, V = 2529.0(10)ų, Z = 4. The final R value was 0.0927 for 3189 reflections [I > 2σ(I)]. The dihedral angle between the xanthene and spirolactam rings systems is 87.45(4)°. Also, the xanthene scaffold is bent due to acetylation, and the end rings of xanthene are inclined to each other at an angle of about 21.52(8)°.

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The crystal of the title compound, C₁₂H₁₆ClNO₃·HCl, belongs to space group P1 with cell dimensions a = 7.1485(8), b = 13.919(2), c = 15.156(2)Å, α = 100.280(7), β = 101.783(7), and γ = 96.176(7)°. The final R value is 0.050. There are two crystallographically independent molecules in the crystal. The conformations of the two molecules are significantly different, with one of them taking an extended conformation and the other a folded one.

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The title compound, C₁₀H₁₂N₂O₄, adopts the keto-amine tautomeric form and displays two intramolecular N-H…O hydrogen bonds. The keto-amine structure is favored by through-molecule conjugation between the hydroxyl O atom and the imine N atom. The title compound crystallizes in the monoclinic space group P2₁/c with the following unit-cell parameters: a = 10.953(2)Å, b = 5.5272(6)Å, c = 18.754(4)Å, β = 108.306(16)° and V = 1077.9(3)ų. The crystal structure of this compound contains two molecules in an asymmetric unit, and each molecule exists as part of an O-H…O hydrogen-bonded centrosymmetric dimer.

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The chemical structure of deN-corynoline (1), which was obtained by the cleavage of C-N bonds of corynoline, was clarified by X-ray crystal analysis to be 7-methyl-7-(4-methyl-benzo[1,3]dioxol-5-yl)-5,6,7,8-tetrahydronaphtho[2,3-d][1,3]dioxol-6-ol. The crystal of (dl)-1 belongs to orthorhombic, space group Pbca and has cell constants of a = 13.435(3)Å, b = 23.358(3)Å, c = 10.139(3)Å, and Z = 8.

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The structure of cholesteryl 1-naphthoate was determine by X-ray crystallography. The carboxyl group makes angles of 0.44(6)° and 58.66(8)° with the naphthalene ring and the cyclohexane ring of cholesterol, respectively. Intermolecular C-H…π and C-H…O interactions were observed.

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The salt 1,1′-butane-1,4-diyl-dibenzimidazolium picrate, in the form of an methanol solvate, is reported. The compound was crystallized in the triclinic system, space group P1 with a = 6.9285(6)Å, b = 10.8287(9)Å, c = 12.9941(11)Å, α = 100.000(4)°, β = 104.942(3)°, γ = 94.865(4)° and Z = 1. The molecule of the title compound, which lies on the crystallographic two-fold axis in the unit cell, contains half of the molecule and one picrate ion. Also, the 1,1′-butane-1,4-diyl-dibenzimidazole cation units are linked by π-π interactions to give infinite two-dimensional (2-D) supramolecular layers, which are further linked by the intermolecular hydrogen bonds between the 1,1′-butane-1,4-diyl-dibenzimidazole cation and the picrate groups to form a three-dimensional (3-D) network supermolecule.

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The crystal structure of [Cu₂L₂], H₂L = 1,2-bis[3,4-dimethyl-5-ethyloxy-carbonyl-pyrrol-2-yl-methyleneamino]ethane, was determined by X-ray diffraction. The complex crystallizes in the monoclinic system, space group C2/c with a = 31.825(3)Å, b = 10.7775(11)Å, c = 28.265(3)Å, β = 101.658(3)°, V = 9494.6(17)ų, Z = 8, R = 0.0543. The structure shows that the complex possesses a double-stranded helical geometry.

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The crystal structure of the title compound, L-(S)-tryptophane D-(R)-mandelate 1.5 hydrate, (I), has been determined. The structure shows molecular recognition in diastereomer salt. In the crystal packing, the hydrophobic and hydrophilic layers were well separated along the a-xis. One water molecule was located in the hydrophilic layer and another hemi water molecule was located in the hydrophobic layer with OH…π interactions, and they contributed to stability of the layers.

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A new hybrid zirconium fluoride, (H₂dap)₂[Zr₂F₁₂] (dap = C₃H₁₀N₂), was prepared by a solvothermal method at 190°C under microwave heating. (H₂dap)₂[Zr₂F₁₂] crystallizes in the monoclinic system, P2₁/n, a = 10.927(3)Å, b = 7.033(3)Å, c = 11.578(5)Å, β = 99.10(3)°. A structure determination, performed from single-crystal X-ray diffraction data, led to the reliability factor R/Rw = 0.015/0.042. The structure is built up from ZrF₇ polyhedra connected by edges to form Zr₂F₁₂ dimers and from diprotonated organic cations.

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The reaction of 3-chloropropionyl chloride with ammonium thiocyanate and 4-fluoroaniline in acetone gave N-(3-chloropropionyl)-N′-(4-fluorophenyl)thiourea. The compound crystallized in the triclinic system with space group P1, a = 5.4651(12)Å, b = 9.033(2)Å, c = 11.894(3)Å, α = 99.814(3)°, β = 93.225(3)°, γ = 94.621(4), volume = 575.2(2)ų and Z = 2. The molecule is not planar, and possesses a trans-cis configuration with respect to the position of the propionyl and 4-fluorophenyl groups relative to the thiono sulphur atom across their C-N bonds, respectively. The molecule is stabilized by N-H…O and N-H…S hydrogen bonds and a C-H…π interaction.

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The structure of N′-(5-bromosalicylaldehyde)-4-toluene-sulfonylhydrazide was determined by X-ray crystallography. The compound crystallized in a orthorhombic system and was characterized as follows: P2₁2₁2₁, a = 6.2054(9), b = 10.4169(13), c = 23.696(2)Å, Z = 4, V = 1531.7(3)ų. The crystal structure was solved by direct methods, and refined by full-matrix least-squares on F² to final values of R1 = 0.0797 and wR2 = 0.1770.

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The title compound, 2-(4-methoxybenzylthio)-1-phenylethanone, was synthesized and structurally characterized by single-crystal X-ray diffraction. The space group was Pna2₁ with the following unit-cell parameters: a = 7.5424(4)Å, b = 11.9347(6)Å, c = 15.2506(7)Å, V = 1372.80(12)ų and Z = 4. The final R value was R1 = 0.0274 for 1499 measured reflections.

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The crystal of the title compound, C₉H₁₃N₅O₄, belongs to space group P2₁ with cell dimensions a = 4.380(2), b = 10.909(4), c = 11.601(4)Å, and β = 99.11(3)°. The final R value is 0.0583. The chain moiety corresponding to the ribose ring in guanosine does not adopt a fully extended conformation. The relative orientation of the purine ring and the ether oxygen atom is similar to that observed in one of the crystallographically independent guanosine molecules in the crystal structure of guanosine dehydrate.

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The title compound, 5,6-benzo-4-[(4-methyl)phenoxymethyl]coumarin, was synthesized and its crystal structure was determined by X-ray diffraction analysis. The compound crystallizes in the triclinic system, with space group P1. The unit-cell dimensions are a = 8.9048(10)Å, b = 10.0350(11)Å, c = 10.4696(12)Å, α = 98.981(2)° β = 106.930(2)° γ = 114.046(2)° and Z = 2. The final R index is R1 = 0.043.

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The structure of 2,2′-[(allylimino)diethane-2,1-diyl]bisphthalimide was determined by X-ray crystallography. The symmetry operation (-x+2, -y+1, -z) generates the whole molecule. The compound crystallized in a monoclinic system, and was characterized thus: P2₁/n, a = 8.013(6)Å, b = 32.731(7)Å, c = 8.485(2)Å, β = 113.50(4)°, Z = 4, V = 2040.8(17)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to final values of R1 = 0.0654 and wR2 = 0.1665.

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The crystal structure of N,N-propylene-bis(2-phenyl)glycinonitrile was determine by single-crystal X-ray diffraction. The compound crystallized in a triclinic system and was characterized thus: P1, a = 9.0471(3), b = 9.8171(4), c = 11.3071(4)Å, α = 113.2400(10)°, β = 93.2270(10)°, γ = 111.9030(10)°, Z = 2, V = 831.42(5)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to final values of R1 = 0.0419 and wR2 = 0.1089.

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The title compound was synthesized and characterized by single-crystal X-ray diffraction. This compound was solved in the monoclinic system, space group P2₁/c with the following unit-cell parameters: a = 8.4879(6)Å, b = 13.9842(10)Å, c = 7.3160(5)Å, β = 96.3660(10)°, Z = 2, V = 863.03(10)ų with half a molecule in the asymmetric unit. The crystal structure was solved by direct methods, and refined by full-matrix least-squares on F² to final values of R1 = 0.0577 and wR2 = 0.1568 for 2008 measured reflections.

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C₂₃H₃₀O₅ is orthorhombic P2₁2₁2₁. The unit-cell dimensions at 298(2)K are a = 7.031(1), b = 12.143(2), c = 24.150(3)Å, V = 2062.0(5)ų, D_x = 1.245 g/cm³, and Z = 4. The R value is R = 0.0400 for 3787 reflections. The A, B, C and D rings occur between half chair and sofa; deformed envelope; sofa; between envelope and half chair conformations, respectively. The molecules in the crystal are packed at normal van der Waals distances.

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The crystal of the title compound, C₃₈H₃₈Si₂, belongs to space group P1 with cell dimensions of a = 8.6324(6), b = 6.8543(5), c = 27.610(2)Å, α = 89.982(4), β = 89.783(4), and γ = 89.990(5)°. The final R value is 0.057. The central 1,4-diphenylbuta-1,3-diyne moiety takes a linear and planar structure. The trimethylsilyl and the terminal phenyl groups are located on opposite sides with respect to the central planar part.

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The cyclopalladated complex [Pd(C²,N-dmba)(μ-SCN)]₂, where dmba = N,N-dimethylbenzylamine, was structurally characterized by single-crystal X-ray diffraction. This compound crystallizes in the monoclinic system, space group P2₁/n with a = 9.578(1)Å, b = 12.323(2)Å, c = 10.279(2)Å, β = 117.03(1)°, V = 1080.7(3)ų, Z = 2. Each Pd(II) center displays a distorted square-planar coordination environment, formed by the C and N atoms from the dmba ligand, and one set of N and S atoms from the bridging SCN groups.

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The title compound, C₁₆H₂₀N₄O₂, was synthesized and characterized by X-ray diffraction analysis. The compound crystallizes in the monoclinic system, space group P2₁ with a = 10.883(3)Å, b = 4.663(1)Å, c = 15.785(3)Å, β = 103.09(2)° and Z = 2. It exists in the keto form and adopts the Z conformation in the solid state. The dihedral angles between the almost planar semicarbazide moiety and the pyrrole and phenyl rings are 82.1(1) and 50.0(2)°, respectively. In the crystal structure, molecules are linked by N-H…O and C-H…O intermolecular interactions into infinite chains parallel to the b axis.

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The title compound, C₁₇H₁₉N₃O₂Cl₃SF, consists of nitro substituted in the butadiene unit, the propylsulfanyl chain and the 4-(fluorophenyl)piperazine groups. The compound crystallizes in the triclinic space group P1, with unit cell parameters: a = 9.1823(5), b = 10.9865(8), c = 11.4414(5)Å, Z = 2, V = 999.31(12)ų, R₁ = 0.059. The butadiene unit is not planar as would be expected if the two double bonds were fully conjugated. The piperazine ring displays a chair conformation.

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The title complex was synthesized from the reaction of CuCl₂·2H₂O, pyridine-2,6-dicarboxylic acid (H₂dipic) and 4-picoline in 1:1:1 mole ratio. It crystallizes in the monoclinic system (space group C2/c) with unit-cell parameters: a = 20.945(5)Å, b = 14.358(5)Å, c = 12.976(4)Å and β = 113.356(7)°. The molecule packs in a non-centrosymmetric manner aligned parallel in a head-to-tail motif involving carboxylate bridging to form 1D polymeric structure, where the Cu1-Cu2 separation is 5.1022 ± 0.0013 Å.

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The title compound, 2,5-dibenzoyl-4-iodoaniline, crystallizes in the monoclinic space group P2₁/n with the following unit-cell parameters: a = 9.896(2), b = 8.4430(17), c = 20.980(4)Å, β = 98.01(3)° and V = 1735.8(6)ų. The crystal struture of this compound was solved by direct methods and refined to a final R = 0.064 for 3115 reflections with I > 2σ(I). In the crystal packing, the molecules are linked via N-H…O and C-H…O hydrogen bonds.

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A new compound N-[1-(3-aminopropyl)imidazole]-3,5-di-tert-butylsalicylaldimine (C₂₁H₃₁N₃O) has been obtained from the reaction of 5 mmol 3,5-DTB in 20 ml absolute ethanol and 5 mmol 1-(3-aminopropyl)imidazole in 10 ml ethanol, with the addition of 3 - 4 drop of acetic acid. The crystal and molecular structure of the title compound has been determined by the X-ray diffraction method. It crystallizes in the monoclinic system, space group P2₁/n with lattice parameters a = 9.2609(8)Å, b = 22.665(2)Å, c = 10.0975(8)Å, β = 100.400(7)° and Z = 4.

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The title compound, (Z)-(±)-2-(3,5-dimethoxyphenyl)-4-(4-methoxybenzylidene)tetrahydrofuran-3-carboxylic acid crystallizes in the triclinic system, space group P1, with the following unit-cell parameters: a = 8.768(5), b = 9.974(6), c = 11.576(6)Å, α = 100.586(7), β = 93.277(7), γ = 111.067(6)°, Z = 2. The crystal structure was solved by direct methods using single-crystal X-ray diffraction data, and refined by full-matrix least-squares procedures to a final R-value of 0.0597 for 3172 observed reflections with I > 2σ(I). The crystal structure is stabilized by intermolecular C-H…O hydrogen-bonding interactions.

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In the title tetranuclear compound, [Cu₄OCl₆(1,4-dioxane)₄], the central oxygen atom is tetrahedrally coordinated to four Cu atoms. Each Cu atom is connected to three others via bridging Cl atoms. The Cu atom has a distorted trigonal-bipyramidal environment, with three Cl atoms in the equatorial plane, and with the μ₄-O atom and the O atom of a 1,4-dioxane ligand at axial positions. The intermolecular hydrogen bonds involve H₂O, CH₃OH and the coordinated and uncoordinated O atom of a 1,4-dioxane ligand.

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An Al-complex with 3,5-di-t-butylsalicylate ions as ligands (commercial name, E-88 from Orient Chemical Industries, LTD) is a charge-control agent (CCA) used for toners in electrophotography. The title compound is found to crystallize in a monoclinic system, as characterized by the following crystallographic parameters: Cc, a = 19.3525(4), b = 35.4460(4), c = 27.9608(7)Å, β = 110.1240(10)°, Z = 4, V = 18009.3(6)ų. The structure was solved by direct methods and refined by full-matrix least squares on F² to final values of R1 = 0.1589 and wR2 = 0.4128.

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The crystal structure of the fentanyl base (C₂₂H₂₈N₂O) is monoclinic, P2₁/n. The unit-cell dimensions at 293 K are a = 5.69263(10)Å, b = 25.1851(5)Å, c = 13.8608(3)Å, β = 104.2037(7)°. The R value is R = 0.0626 for 2208 reflections. The piperidine ring has a near-ideal chair conformation. In the packing, the intermolecular T-shaped π/π interactions were observed.

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The crystal structure of the title compound was solved in the monoclinic space group P2₁/c, with a = 18.8290(8)Å, b = 24.515(2)Å, c = 9.6301(18)Å, β = 99.245(7)°, V = 4387.5(9)ų, Z = 8, R₁ = 0.0618, for 4752 reflections with I > 2σ(I), with two unique molecules in the asymmetric unit. Relatively strong inter-molecular hydrogen bonds connect these two molecules, forming a dimer structure. Weak hydrogen bonds between these dimers together with C-H…p interactions stabilize the crystal structure.

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The crystal structure of a hexahydrobenzo[c]phenanthridine-type alkaloid (d)-11-oxo-corynoline (1), 5b,6,7,12b,13,14-hexahydro-5b,13-dimethyl-[1,3]benzodioxolo[5,6-c]1,3-dioxolo[4,5-i] phenanthridine-6-one, is reported here. The crystal is orthorhombic, space group P2₁2₁2₁ with a = 7.8481(6)Å, b = 10.1203(8)Å, c = 21.573(2)Å, and Z = 4.

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The structure of (4-(4-fluorophenyl)-2-hydroxy-2-methyl-3,4-dihydropyrano[3,2-c]chromen-5(2H)-one, C₁₉H₁₅FO₄, was determined by X-ray crystallography. This compound crystallized in the orthorhombic crystal system and was characterized thus: F d d 2, a = 25.057(3)Å, b = 42.713(5)Å, c = 5.792(1)Å, Z = 16, V = 6198.9(15)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to a final R1 of 0.033.

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A new polymorphic crystal of the title compound, C₃H₄N₂OS, belongs to space group P1 with cell dimensions of a = 4.0520(9)Å, b = 6.550(1)Å, c = 9.170(2)Å, α = 100.148(4)°, β = 100.814(4)°, γ = 96.831(4)°, R1 = 0.069. Neighboring molecules are connected to form cyclic dimers via two types of hydrogen bonds, one between the thioamide groups and the other between the amide moieties, showing a distinctive difference from the hydrogen-bonding pattern of the known form.

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The crystal structure of a new polymorph of 1-acetyl-2-thiohydantoin has been determined by X-ray diffraction. The crystal, C₅H₆N₂O₂S, belongs to space group P1 with cell dimensions of a = 4.9865(7)Å, b = 5.5716(7)Å, c = 12.544(2)Å, α = 74.793(8)°, β = 80.413(9)°, γ = 85.001(10)°. The final R1 value is 0.036 for 1304 reflections (I > 2.0σ(I)). In the new polymorph, intermolecular hydrogen bonds are formed between the acetyl C=O and the amide N-H groups [N(1)…O(2)⁽ⁱ⁾ 2.800(2)Å, N(1)-H…O(2)⁽ⁱ⁾ 151.02°, symmetry codes: (i) x+1, y-1, z] to form an infinite chain structure. On the other hand, the hydrogen bonds in the known form are formed between the amide C=O and the amide N-H groups of the thiohydantoin rings.

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The crystal structure of N,N′-dipyridyl-N,N′-ethylenedi(5-bromo-3-formyl-2-hydroxybenzylamine) was determined by single-crystal X-ray diffraction. The compound crystallizes in a monoclinic system and was characterized thus: C2/c, a = 17.6158(13), b = 9.2327(7), c = 17.6983(13)Å, β = 102.771(2)°, Z = 4, V = 2807.3(4)ų. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F² to final values of R1 = 0.0557 and wR2 = 0.0648. The complex consists of monomeric units with a coordination sphere of CoN₄O₂ type. The geometry around cobalt(II) is distorted octahedral with two amine nitrogen donors, two cis-phenolic oxygen donors, and two trans-pyridine nitrogen atoms.

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C₁₈H₁₅NO₃S is orthorhombic, P2₁2₁2₁. The unit-cell dimensions at 293 K are a = 7.182(1), b = 11.100(1), c = 20.644(2)Å, V = 1645.7(3)ų, D_x = 1.313 g/cm³, and Z = 4. The R value is R = 0.0552 for 1493 reflections with I > 2σ(I). The title compound has two independent rings: a phenyl ring and a benzothiazole ring bridge via an ethyl moiety. Apart from the C-H…O intermolecular interactions, the molecules in the crystal are packed at normal van der Waals distances.

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The structure of N,N,N′,N′-tetraethyl-9,10-anthracene-dimethanamine (1) was determined by X-ray crystallography. The molecule of 1 sits on a center of symmetry such that the two diethylaminomethyl groups are in an anti conformation with respect to one another across the anthracene ring. An intermolecular C-H…π interaction was observed in the crystal lattice.

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