N'-[(E)-3-Indol-3-ylmethyl-ene]isonicotino-hydrazide monohydrate
Summary
This study details the crystal structure of a new compound formed from isonicotinylhydrazine and 3-indolylformaldehyde. The molecule exhibits an E configuration and features extensive hydrogen bonding in its crystal lattice.
Area of Science:
- Crystallography
- Organic Chemistry
- Supramolecular Chemistry
Background:
- The synthesis and structural characterization of novel organic compounds are crucial for advancing materials science and medicinal chemistry.
- Schiff bases derived from hydrazines and aldehydes are versatile building blocks in organic synthesis.
- Understanding intermolecular interactions, such as hydrogen bonding, is key to predicting and controlling crystal packing and material properties.
Purpose of the Study:
- To synthesize and characterize the crystal structure of the condensation product of isonicotinylhydrazine and 3-indolylformaldehyde.
- To elucidate the molecular geometry, including the configuration around the C=N double bond and the relative orientation of the pyridine and indole rings.
- To identify and analyze the intermolecular interactions, particularly hydrogen bonding, present in the crystalline state.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the three-dimensional structure of the compound.
- The compound was synthesized via a condensation reaction between isonicotinylhydrazine and 3-indolylformaldehyde.
- Analysis of the crystal structure involved identifying hydrogen bond donors and acceptors and calculating dihedral angles.
Main Results:
- Crystals of C(15)H(12)N(4)O·H(2)O were successfully obtained and characterized.
- The molecule adopts an E configuration, with the isonicotinoylhydrazine and indole moieties positioned on opposite sides of the C=N double bond.
- A significant dihedral angle of 44.72(7)° was observed between the pyridine and indole ring systems.
- Extensive hydrogen bonding networks, including N-H⋯N, N-H⋯O, O-H⋯O, and O-H⋯N interactions, along with weak C-H⋯O interactions, were identified.
Conclusions:
- The study provides a detailed structural analysis of a novel Schiff base derivative.
- The observed molecular conformation and extensive hydrogen bonding significantly influence the crystal packing.
- The findings contribute to the understanding of structure-property relationships in organic crystalline materials.
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