scholarly journals Crystal structure and Hirshfeld surface analysis of ethyl 2-{4-[(3-methyl-2-oxo-1,2-dihydroquinoxalin-1-yl)methyl]-1H-1,2,3-triazol-1-yl}acetate

2018 ◽  
Vol 74 (11) ◽  
pp. 1648-1652 ◽  
Author(s):  
Nadeem Abad ◽  
Youssef Ramli ◽  
Tuncer Hökelek ◽  
Nada Kheira Sebbar ◽  
Joel T. Mague ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Crystal Packing ◽  
Triazole Ring ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Compound C ◽  
Π Stacking ◽  
Centroid Distance

The molecule of the title compound, C16H17N5O3, is build up from two fused six-membered rings linked to a 1,2,3-triazole ring, which is attached to an ethyl azido-acetate group. The dihydroqinoxalinone portion is planar to within 0.0512 (12) Å and is oriented at a dihedral angle of 87.83 (5)° with respect to the pendant triazole ring. In the crystal, a combination of intermolecular C—H...O and C—H...N hydrogen bonds together with slipped π-stacking [centroid–centroid distance = 3.7772 (12) Å] and C—H...π (ring) interactions lead to the formation of chains extending along the c-axis direction. Additional C—H...O hydrogen bonds link these chains into layers parallel to the bc plane and the layers are tied together by complementary π-stacking [centroid–centroid distance = 3.5444 (12) Å] interactions. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (44.5%), H...O/O...H (18.8%), H...N/N...H (17.0%) and H...C/C...H (10.4%) interactions.

scholarly journals Crystal structure and Hirshfeld surface analysis of 1-[(1-butyl-1H-1,2,3-triazol-4-yl)methyl]-3-methylquinoxalin-2(1H)-one

2018 ◽  
Vol 74 (12) ◽  
pp. 1815-1820
Author(s):  
Nadeem Abad ◽  
Youssef Ramli ◽  
Tuncer Hökelek ◽  
Nada Kheira Sebbar ◽  
Joel T. Mague ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Surface Analysis ◽  
Crystal Packing ◽  
Triazole Ring ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Stacking Interactions ◽  
Ring Plane ◽  
Compound C ◽  
Centroid Distance

The title compound, C16H19N5O, is built up from a planar quinoxalinone ring system linked through a methylene bridge to a 1,2,3-triazole ring, which in turn carries ann-butyl substituent. The triazole ring is inclined by 67.09 (4)° to the quinoxalinone ring plane. In the crystal, the molecules form oblique stacks along thea-axis direction through intermolecular C—HTrz...NTrz(Trz = triazole) hydrogen bonds, and offset π-stacking interactions between quinoxalinone rings [centroid–centroid distance = 3.9107 (9) Å] and π–π interactions, which are associated pairwise by inversion-related C—HDhydqn...π(ring) (Dhydqn = dihydroquinoxaline) interactions. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (52.7%), H...N/N...H (18.9%) and H...C/C...H (17.0%) interactions.

scholarly journals Crystal structure and Hirshfeld surface analysis of (E)-1-[2,2-dichloro-1-(4-nitrophenyl)ethenyl]-2-(4-fluorophenyl)diazene

2019 ◽  
Vol 75 (2) ◽  
pp. 237-241 ◽  
Author(s):  
Zeliha Atioğlu ◽  
Mehmet Akkurt ◽  
Namiq Q. Shikhaliyev ◽  
Gulnar T. Suleymanova ◽  
Khanim N. Bagirova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Surface Analysis ◽  
Title Compound ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Ring Form ◽  
Compound C

In the title compound, C14H8Cl2FN3O2, the 4-fluorophenyl ring and the nitro-substituted benzene ring form a dihedral angle of 63.29 (8)°. In the crystal, molecules are linked by C—H...O hydrogen bonds into chains running parallel to the c axis. The crystal packing is further stabilized by C—Cl...π, C—F...π and N—O...π interactions. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions to the crystal packing are from H...O/O...H (15.5%), H...H (15.3%), Cl...H/H...Cl (13.8%), C...H/H...C (9.5%) and F...H/H...F (8.2%) interactions.

scholarly journals Crystal structure and Hirshfeld surface analysis of N,N′-[ethane-1,2-diylbis(oxy)]bis(4-methylbenzenesulfonamide)

2019 ◽  
Vol 75 (1) ◽  
pp. 81-85
Author(s):  
Seher Meral ◽  
Sevgi Kansiz ◽  
Necmi Dege ◽  
Aysen Alaman Agar ◽  
Galyna G. Tsapyuk
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Crystal Packing ◽  
Rotation Axis ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Two Dimensional ◽  
Compound C ◽  
Supramolecular Chains

In the molecule of the title compound, C16H20N2O6S2, the mid-point of the C—C bond of the central ethane moiety is located on a twofold rotation axis. In the crystal, molecules are linked by N—H...O hydrogen bonds into supramolecular chains propagating along the [101] direction. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (43.1%), O...H/H...O (40.9%), C...H/H...C (8.8%) and C...C (5.5%) interactions.

scholarly journals Crystal structure, Hirshfeld surface analysis and interaction energy and DFT studies of 3-{(2Z)-2-[(2,4-dichlorophenyl)methylidene]-3-oxo-3,4-dihydro-2H-1,4-benzothiazin-4-yl}propanenitrile

2019 ◽  
Vol 75 (6) ◽  
pp. 721-727 ◽  
Author(s):  
Nada Kheira Sebbar ◽  
Brahim Hni ◽  
Tuncer Hökelek ◽  
Abdelhakim Jaouhar ◽  
Mohamed Labd Taha ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Density Functional ◽  
Energy Gap ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Boat Conformation ◽  
Compound C

The title compound, C18H12Cl2N2OS, consists of a dihydrobenzothiazine unit linked by a –CH group to a 2,4-dichlorophenyl substituent, and to a propanenitrile unit is folded along the S...N axis and adopts a flattened-boat conformation. The propanenitrile moiety is nearly perpendicular to the mean plane of the dihydrobenzothiazine unit. In the crystal, C—HBnz...NPrpnit and C—HPrpnit...OThz (Bnz = benzene, Prpnit = propanenitrile and Thz = thiazine) hydrogen bonds link the molecules into inversion dimers, enclosing R 2 2(16) and R 2 2(12) ring motifs, which are linked into stepped ribbons extending along [110]. The ribbons are linked in pairs by complementary C=O...Cl interactions. π–π contacts between the benzene and phenyl rings, [centroid–centroid distance = 3.974 (1) Å] may further stabilize the structure. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (23.4%), H...Cl/Cl...H (19.5%), H...C/C...H (13.5%), H...N/N...H (13.3%), C...C (10.4%) and H...O/O...H (5.1%) interactions. Hydrogen bonding and van der Waals interactions are the dominant interactions in the crystal packing. Computational chemistry calculations indicate that the two independent C—HBnz...NPrpnit and C—HPrpnit...OThz hydrogen bonds in the crystal impart about the same energy (ca 43 kJ mol−1). Density functional theory (DFT) optimized structures at the B3LYP/6–311 G(d,p) level are compared with the experimentally determined molecular structure in the solid state. The HOMO–LUMO behaviour was elucidated to determine the energy gap.

scholarly journals Crystal structure and Hirshfeld surface analysis of 1-[(E)-2-(5-chloro-2-hydroxyphenyl)hydrazin-1-ylidene]naphthalen-2(1H)-one

2021 ◽  
Vol 77 (6) ◽  
pp. 672-676
Author(s):  
Hassiba Bougueria ◽  
Souheyla Chetioui ◽  
Mohammed Abdellatif Bensegueni ◽  
Jean-Pierre Djukic ◽  
Nesrine Benarous
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Crystal Packing ◽  
Coupling Reaction ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Hydroxyl Group ◽  
Asymmetric Unit ◽  
Compound C

The title compound, C16H11ClN2O2, was obtained by diazotization of 2-amino-4-chlorophenol followed by a coupling reaction with β-naphthol. There are two molecules (A and B) in the asymmetric unit. The crystal structure features only one type of intermolecular interaction, that is strong hydrogen bonds involving the hydroxyl group. The naphthol and phenol fragments attached to the C=N—N— moiety exhibit an s-trans conformation. In addition, those fragments are almost coplanar, subtending a dihedral angle of 13.11 (2)° in molecule A and 10.35 (2)° in molecule B. A Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H...H (32.1%), C...H/H...C (23.1%), Cl...H/H...Cl (15.2%), O...H/H...O (12.8%) and C...C (9%) contacts.

scholarly journals Crystal structure and Hirshfeld surface analysis of (3S,3aR,6aS)-3-(1,3-diphenyl-1H-pyrazol-4-yl)-5-(4-methoxyphenyl)-2-phenyl-3,3a,4,5,6,6a-hexahydro-2H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione

2021 ◽  
Vol 77 (4) ◽  
pp. 356-359
Author(s):  
Shaaban K. Mohamed ◽  
Awad I. Said ◽  
Joel T. Mague ◽  
Talaat I. El-Emary ◽  
Mehmet Akkurt ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Title Compound ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Compound C ◽  
Chiral Carbon

In the title compound, C33H26N4O4, the two fused five-membered rings and their N-bound aromatic substituents form a pincer-like motif. The relative conformations about the three chiral carbon atoms are established. In the crystal, a combination of C—H...O and C—H...N hydrogen bonds and C—H...π(ring) interactions leads to the formation of layers parallel to the bc plane. A Hirshfeld surface analysis indicates that the most significant contributions to the crystal packing are from H...H (44.3%), C...H/H...C (29.8%) and O...H/H...O (15.0%) contacts.

scholarly journals Crystal structure and Hirshfeld surface analysis of (E)-1-[(4,7-dimethylquinolin-2-yl)methylidene]semicarbazide dihydrate

2018 ◽  
Vol 74 (11) ◽  
pp. 1674-1677
Author(s):  
Ercan Aydemir ◽  
Sevgi Kansiz ◽  
Necmi Dege ◽  
Hasan Genc ◽  
Snizhana V. Gaidai
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Organic Molecule ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Two Dimensional ◽  
Compound C ◽  
Dimensional Network

In the title compound, C13H14N4O·2H2O, the organic molecule is almost planar. In the crystal, the molecules are linked by O—H...O, N—H...O and O—H...N hydrogen bonds, forming a two-dimensional network parallel to (10\overline{1}). Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (55.4%), H...O/O...H (14.8%), H...C/C...H (11.7%) and H...N/N...H (8.3%) interactions.

scholarly journals Crystal structure and Hirshfeld surface analysis of the naturally occurring cassane-type diterpenoid, 6β-cinnamoyl-7β-hydroxyvouacapen-5α-ol

2018 ◽  
Vol 74 (3) ◽  
pp. 385-389 ◽  
Author(s):  
K. Osahon Ogbeide ◽  
Rajesh Kumar ◽  
Mujeeb-Ur-Rehman ◽  
Bodunde Owolabi ◽  
Abiodun Falodun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Title Compound ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Π Interactions ◽  
Compound C ◽  
Naturally Occurring

The title compound, C29H36O5, a cassane-type diterpenoid {systematic name: (4aR,5R,6R,6aS,7R,11aS,11bR)-4a,6-dihydroxy-4,4,7,11b-tetramethyl-1,2,3,4,4a,5,6,6a,7,11,11a,11b-dodecahydrophenanthro[3,2-b]furan-5-yl 3-phenylprop-2-enoate}, was isolated from a medicinally important plant,Caesalpinia pulcherrima(Fabaceae). In the molecule, three cyclohexane rings aretrans-fused and adopt chair, chair and half-chair conformations. In the crystal, molecules are linkedviaO—H...O hydrogen bonds, forming a tape structure along theb-axis direction. The tapes are further linked into a double-tape structure through C—H...π interactions. The Hirshfeld surface analysis indicates that the contributions to the crystal packing are H...H (65.5%), C...H (18.7%), O...H (14.5%) and C...O (0.3%).

scholarly journals Crystal structure and Hirshfeld surface analysis of 1-{[2-oxo-3-(prop-1-en-2-yl)-2,3-dihydro-1H-1,3-benzodiazol-1-yl]methyl}-3-(prop-1-en-2-yl)-2,3-dihydro-1H-1,3-benzodiazol-2-one

2018 ◽  
Vol 74 (12) ◽  
pp. 1746-1750 ◽  
Author(s):  
Asmaa Saber ◽  
Nada Kheira Sebbar ◽  
Tuncer Hökelek ◽  
Brahim Hni ◽  
Joel T. Mague ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Surface Analysis ◽  
Title Compound ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Compound C ◽  
Hydrogen Bonded

In the title compound, C21H20N4O2, the intramolecular C—H...O hydrogen-bonded benzodiazolone moieties are planar to within 0.017 (1) and 0.026 (1) Å, and are oriented at a dihedral angle of 57.35 (3)°. In the crystal, two sets of intermolecular C—H...O hydrogen bonds generate layers parallel to the bc plane. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (51.8%), H...C/C...H (30.7%) and H...O/O...H (11.2%) interactions.

scholarly journals Crystal structure, Hirshfeld surface analysis, interaction energy and DFT studies of (2Z)-2-(2,4-dichlorobenzylidene)-4-nonyl-3,4-dihydro-2H-1,4-benzothiazin-3-one

2020 ◽  
Vol 76 (2) ◽  
pp. 281-287 ◽  
Author(s):  
Brahim Hni ◽  
Nada Kheira Sebbar ◽  
Tuncer Hökelek ◽  
Achour Redouane ◽  
Joel T. Mague ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Density Functional ◽  
Energy Gap ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Boat Conformation ◽  
Compound C

The title compound, C24H27Cl2NOS, contains 1,4-benzothiazine and 2,4-dichlorophenylmethylidene units in which the dihydrothiazine ring adopts a screw-boat conformation. In the crystal, intermolecular C—HBnz...OThz (Bnz = benzene and Thz = thiazine) hydrogen bonds form chains of molecules extending along the a-axis direction, which are connected to their inversion-related counterparts by C—HBnz...ClDchlphy (Dchlphy = 2,4-dichlorophenyl) hydrogen bonds and C—HDchlphy...π (ring) interactions. These double chains are further linked by C—HDchlphy...OThz hydrogen bonds, forming stepped layers approximately parallel to (012). The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (44.7%), C...H/H...C (23.7%), Cl...H/H...Cl (18.9%), O...H/H...O (5.0%) and S...H/H...S (4.8%) interactions. Hydrogen-bonding and van der Waals interactions are the dominant interactions in the crystal packing. Computational chemistry indicates that in the crystal, C—HDchlphy...OThz, C—HBnz...OThz and C—HBnz...ClDchlphy hydrogen-bond energies are 134.3, 71.2 and 34.4 kJ mol−1, respectively. Density functional theory (DFT) optimized structures at the B3LYP/6–311 G(d,p) level are compared with the experimentally determined molecular structure in the solid state. The HOMO–LUMO behaviour was elucidated to determine the energy gap. The two carbon atoms at the end of the nonyl chain are disordered in a 0.562 (4)/0.438 (4) ratio.

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