Related Experiment Video
Updated: Aug 22, 2025

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
(3Z,5E)-2-Amino-4,6-bis(pyridin-3-yl)hepta-1,3,5-triene-1,1,3-tricarbo-nitrile
Changting Cai1, Bicheng Lin1, Wenxuan Wu1
1Department of Chemistry, Anhui University, Hefei, Anhui 230039, People's Republic of China.
The crystal structure of C20H14N6 reveals a 37.98° dihedral angle between pyridine rings. Molecules self-assemble into sheets via N-H⋯N hydrogen bonds in the solid state.
Area of Science:
- Crystallography
- Supramolecular Chemistry
- Organic Chemistry
Background:
- Understanding molecular interactions and crystal packing is crucial in materials science.
- Hydrogen bonding plays a significant role in the self-assembly of organic molecules.
- Pyridine-containing compounds exhibit diverse applications due to their electronic and structural properties.
Purpose of the Study:
- To elucidate the crystal structure of the title compound, C20H14N6.
- To investigate the intermolecular interactions governing the solid-state arrangement.
- To characterize the dihedral angle between pyridine rings and hydrogen bonding networks.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Analysis of bond lengths, bond angles, and torsion angles provided structural insights.
- Intermolecular interactions, specifically hydrogen bonds, were identified and analyzed.
Main Results:
- The crystal structure of C20H14N6 was successfully determined.
- A dihedral angle of 37.98(7)° was measured between the pyridine rings.
- N-H⋯N hydrogen bonds were observed, linking molecules into (10) sheets.
Conclusions:
- The study provides detailed crystallographic data for C20H14N6.
- The observed hydrogen bonding pattern dictates the formation of 2D supramolecular sheets.
- The structural insights contribute to the understanding of crystal engineering with pyridine-based molecules.
More Related Videos
06:34Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
Published on: June 20, 2014
11:04Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine
Published on: June 13, 2022
Related Concept Videos
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group...
Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
Structures of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Structure of Conjugated Dienes
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Structure of Amines
Radicals: Electronic Structure and Geometry
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...