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SN2 substitutions and E2 eliminations of alkyl halides proceed via a concerted pathway. While the nucleophile attacks the alpha carbon in SN2 reactions, it functions as a strong base and abstracts a beta hydrogen in the E2 mechanism. The rate-limiting transition state in E2 elimination reactions is characterized by partially broken carbon–hydrogen and carbon–halogen bonds and a partially formed pi bond between the alpha and beta carbons. The beta hydrogen and halide are eliminated...

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(E)-2-[(2-Hydr-oxy-5-nitro-phen-yl)iminiometh-yl]phenolate.

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Summary

This study reveals a zwitterionic effect in a novel molecule (C13H10N2O4) due to π delocalization. Intramolecular hydrogen bonding and intermolecular O-H⋯O interactions influence its crystal structure, forming zigzag chains.

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Area of Science:

Crystallography
Computational Chemistry
Molecular Structure

Background:

Understanding molecular interactions and electronic properties is crucial in chemical research.
The study of novel organic molecules provides insights into structure-property relationships.

Purpose of the Study:

To elucidate the molecular structure and electronic properties of C13H10N2O4.
To investigate the influence of hydrogen bonding on crystal packing.
To computationally support experimental observations.

Main Methods:

X-ray crystallography was used to determine the molecular and crystal structure.
Analysis of bond lengths and dihedral angles provided insights into electronic delocalization.
MOPAC PM3 calculations were performed for theoretical support.

Main Results:

The molecule exhibits a dihedral angle of 21.6° between benzene and phenolate rings.
Intramolecular hydrogen bonding and π delocalization create a zwitterionic effect.
Intermolecular O-H⋯O hydrogen bonding leads to zigzag chains in the crystal structure.

Conclusions:

The observed molecular geometry and electronic distribution are consistent with a zwitterionic character.
Crystal packing is significantly influenced by intermolecular hydrogen bonding.
Computational results corroborate the experimental findings regarding molecular structure and interactions.