4-[4-(Diethyl-amino)benzyl-ideneamino]-4H-1,2,4-triazole
Jian Xin Pan1, Ju Zhou Zhang, Qian Wang Chen
1Hefei National Laboratory for Physical Sciences at Microscale, and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, People's Republic of China.
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
This study synthesized a novel Schiff base, C(13)H(17)N(5), from 4-amino-4H-1,2,4-triazole and 4-(diethyl-amino)benzaldehyde. Its crystal structure reveals a specific dihedral angle and stabilization via intermolecular hydrogen bonding.
Area of Science:
- Organic Chemistry
- Crystallography
- Materials Science
Background:
- Schiff bases are versatile organic compounds with diverse applications.
- Triazole derivatives are known for their biological and material properties.
- Understanding molecular geometry and intermolecular interactions is crucial for material design.
Purpose of the Study:
- To synthesize and characterize a novel Schiff base derived from 4-amino-4H-1,2,4-triazole and 4-(diethyl-amino)benzaldehyde.
- To elucidate the crystal structure and intermolecular interactions of the synthesized compound.
- To explore the structural features influencing the properties of this new Schiff base.
Main Methods:
- Chemical synthesis involving the reaction of 4-amino-4H-1,2,4-triazole with 4-(diethyl-amino)benzaldehyde.
- Single-crystal X-ray diffraction to determine the molecular and crystal structure.
- Analysis of bond angles, dihedral angles, and intermolecular interactions (hydrogen bonding).
Main Results:
- Successful synthesis of the Schiff base C(13)H(17)N(5).
- The crystal structure shows a dihedral angle of 5.77(16)° between the triazole and benzene rings.
- An intermolecular C-H⋯N hydrogen bond was identified as a key stabilizing interaction in the crystal lattice.
Conclusions:
- The synthesized Schiff base possesses a defined three-dimensional structure with specific ring orientations.
- Intermolecular hydrogen bonding plays a significant role in the crystal packing and stability of the compound.
- This structural information provides a foundation for further investigations into the potential applications of this novel Schiff base.
Related Concept Videos
Diazonium Group Substitution: –OH and –H
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.


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