Supramolecular Assemblies Directed by Hydrogen Bonds and π-π Interactions and Based on N-Heterocyclic-Ligand-Modified β-Octamolybdate - Structure and Catalytic Application in Olefin Epoxidation

2011 ◽  
Vol 2011 (15) ◽  
pp. 2361-2365 ◽  
Author(s):  
Juan Du ◽  
Jiehui Yu ◽  
Jianyuan Tang ◽  
Jing Wang ◽  
Wenxiang Zhang ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Supramolecular Assemblies ◽  
Olefin Epoxidation ◽  
Heterocyclic Ligand ◽  
Π Interactions ◽  
Catalytic Application

scholarly journals (E)-2-(2-Hydroxy-3-methylbenzylidene)-N-methylhydrazine-1-carbothioamide: supramolecular assemblies in two-dimensions mediated by N—H...S and C—H...π interactions

2019 ◽  
Vol 75 (5) ◽  
pp. 571-575
Author(s):  
Md. Azharul Arafath ◽  
Huey Chong Kwong ◽  
Farook Adam
Keyword(s):  
Double Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Two Dimensions ◽  
Supramolecular Assemblies ◽  
Maximum Deviation ◽  
Π Interactions ◽  
Compound C

In the title compound, C10H13N3OS, the azomethine C=N double bond has an E configuration. The phenyl ring and methylhydrazine carbothioamide moiety [maximum deviation = 0.008 (2) Å] are twisted slightly with a dihedral angle of 14.88 (10)°. In the crystal, molecules are linked into sheets parallel to the ab plane via N—H...S hydrogen bonds and C—H...π interactions.

Syntheses, crystal structures and supramolecular assemblies of two Cu(II) complexes based on a new heterocyclic ligand: Insights through C─H•••Cl and π•••π interactions

CrystEngComm ◽  
2022 ◽  
Author(s):  
Samit Pramanik ◽  
Sudipta Pathak ◽  
Antonio Frontera ◽  
Subrata Mukhopadhyay
Keyword(s):  
Crystal Structures ◽  
Supramolecular Assemblies ◽  
Spectroscopic Methods ◽  
Heterocyclic Ligand ◽  
Π Interactions

A heterocyclic ligand, N3L [4-(1-methylimidazole)-2,6-di(pyrazinyl)pyridine] has been synthesized and characterized by several spectroscopic methods. The ligand (N3L) was then used for the preparation of two complexes, namely, [Cu(N3L)Cl2] (complex 1)...

scholarly journals Three closely related (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(methoxyphenyl)prop-2-en-1-ones]: supramolecular assemblies in one dimension mediated by hydrogen bonding and C—H...π interactions

2017 ◽  
Vol 73 (6) ◽  
pp. 896-900 ◽  
Author(s):  
Aijia Sim ◽  
C. S. Chidan Kumar ◽  
Huey Chong Kwong ◽  
Li Yee Then ◽  
Yip-Foo Win ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Supramolecular Assemblies ◽  
One Dimension ◽  
Dihedral Angles ◽  
Inversion Symmetry ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Benzene Rings

In the title compounds, (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(2-methoxyphenyl)prop-2-en-1-one], C26H22O4(I), (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(3-methoxyphenyl)prop-2-en-1-one], C26H22O4(II) and (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(3,4-dimethoxyphenyl)prop-2-en-1-one], C28H26O6(III), the asymmetric unit consists of a half-molecule, completed by crystallographic inversion symmetry. The dihedral angles between the central and terminal benzene rings are 56.98 (8), 7.74 (7) and 7.73 (7)° for (I), (II) and (III), respectively. In the crystal of (I), molecules are linked by pairs of C—H...π interactions into chains running parallel to [101]. The packing for (II) and (III), features inversion dimers linked by pairs of C—H...O hydrogen bonds, formingR22(16) andR22(14) ring motifs, respectively, as parts of [201] and [101] chains, respectively.

Supramolecular assemblies of 2-hydroxy-3-naphthoic acid and N-heterocycles via various strong hydrogen bonds and weak X⋯π (X = C–H, π) interactions

RSC Advances ◽  
2015 ◽  
Vol 5 (51) ◽  
pp. 40912-40923 ◽  
Author(s):  
Yanyan Pang ◽  
Peiqi Xing ◽  
Xiujuan Geng ◽  
Yujing Zhu ◽  
Faqian Liu ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Supramolecular Assemblies ◽  
Π Interactions ◽  
Naphthoic Acid

Hydrogen bonds and weak X⋯π (X = C–H, π) interactions in a series of multi-component molecules constructed from 2-hydroxy-3-naphthoic acid with N-heterocycles are discussed in context.

cis-Dioxomolybdenum(VI) Complexes Containing Chiral Ligands: Synthesis and Catalytic Application in Olefin Epoxidation

2011 ◽  
Vol 1 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Jose A. Brito ◽  
Nathalie Saffon ◽  
Montserrat Gomez ◽  
Beatriz Royo
Keyword(s):  
Chiral Ligands ◽  
Olefin Epoxidation ◽  
Catalytic Application

scholarly journals N-(3-Chloro-4-ethoxy-1-methyl-1H-indazol-5-yl)-4-methoxybenzenesulfonamide

2014 ◽  
Vol 70 (6) ◽  
pp. o679-o679 ◽  
Author(s):  
Hakima Chicha ◽  
El Mostapha Rakib ◽  
Abdellah Hannioui ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Ethoxy Group ◽  
Π Interactions ◽  
Compound C ◽  
The Mean

The indazole ring system of the title compound, C17H18ClN3O4S, is almost planar (r.m.s. deviation = 0.0113 Å) and forms dihedral angles of 32.22 (8) and 57.5 (3)° with the benzene ring and the mean plane through the 4-ethoxy group, respectively. In the crystal, molecules are connected by pairs of N—H...O hydrogen bonds into inversion dimers, which are further linked by π–π interactions between the diazole rings [intercentroid distance = 3.4946 (11) Å], forming chains parallel to [101].

scholarly journals 3-(Adamantan-1-yl)-4-benzyl-1H-1,2,4-triazole-5(4H)-thione

2014 ◽  
Vol 70 (7) ◽  
pp. o766-o767 ◽  
Author(s):  
Fatmah A. M. Al-Omary ◽  
Hazem A. Ghabbour ◽  
Ali A. El-Emam ◽  
C. S. Chidan Kumar ◽  
Hoong-Kun Fun
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Triazole Ring ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Supramolecular Chains

The title compound, C19H23N3S, is a functionalized triazoline-3-thione derivative. The benzyl ring is almost normal to the planar 1,2,4-triazole ring (r.m.s. deviation = 0.007 Å) with a dihedral angle of 86.90 (7)°. In the crystal, molecules are linked by pairs of N—H...S hydrogen bonds, forming inversion dimers that encloseR22(8) loops. The crystal packing is further stabilized by weak C—H...π interactions that link adjacent dimeric units into supramolecular chains extending along thea-axis direction.

scholarly journals N′-(3-Hydroxybenzylidene)-4-methylbenzohydrazide

2012 ◽  
Vol 68 (6) ◽  
pp. o1816-o1816
Author(s):  
Ji-Lai Liu ◽  
Ming-Hui Sun ◽  
Jing-Jun Ma
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Aromatic Rings ◽  
Π Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Benzene Rings

The title compound, C15H14N2O2, was obtained from the reaction of 3-hydroxybenzaldhyde and 4-methylbenzohydrazide in methanol. In the molecule, the benzene rings form a dihedral angle of 2.9 (3)°. In the crystal, N—H...O and O—H...O hydrogen bonds link the molecules into layers parallel to (101). The crystal packing also exhibits π–π interactions between the aromatic rings [centroid–centroid distance = 3.686 (4) Å].

scholarly journals Crystal structure of bis(azido-κN)bis[2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole-κ2N2,N3]cobalt(II)

2015 ◽  
Vol 71 (5) ◽  
pp. 452-454 ◽  
Author(s):  
Abdelhakim Laachir ◽  
Fouad Bentiss ◽  
Salaheddine Guesmi ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Title Complex ◽  
Octahedral Coordination ◽  
Maximum Deviation ◽  
Coordination Geometry ◽  
Acta Cryst ◽  
Π Interactions ◽  
The Mean

In the mononuclear title complex, [Co(N3)2(C12H8N4S)2], the cobalt(II) atom is located on an inversion centre and displays an axially weakly compressed octahedral coordination geometry. The equatorial positions are occupied by the N atoms of two 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole ligands, whereas the axial positions are occupied by N atoms of the azide anions. The thiadiazole and pyridine rings linked to the metal are almost coplanar, with a maximum deviation from the mean plane of 0.0273 (16) Å. The cohesion of the crystal is ensured by weak C—H...N hydrogen bonds and by π–π interactions between pyridine rings [intercentroid distance = 3.6356 (11) Å], forming a layered arrangement parallel to (001). The structure of the title compound is isotypic with that of the analogous nickel(II) complex [Laachiret al.(2013).Acta Cryst.E69, m351–m352].

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