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Resonance Response to Intermolecular Interaction: A Natural Resonance Theory Analysis
1Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
Summary
Supramolecular stabilization significantly alters molecular resonance structures. Water complexation can change resonance by up to 32% and introduce new resonance patterns, impacting chemical predictions.
Area of Science:
- Computational Chemistry
- Supramolecular Chemistry
- Organic Chemistry
Background:
- Resonance is a fundamental concept in organic chemistry.
- The influence of supramolecular stabilization on resonance is not well understood.
- Exploring resonance modulation enhances understanding of molecular behavior.
Purpose of the Study:
- To investigate how supramolecular stabilization affects resonance.
- To quantify the impact of noncovalent interactions on resonance structures.
- To explore the participation of water molecules in resonance.
Main Methods:
- Natural Resonance Theory (NRT)
- Ab initio computational methods (DF-MP2, coupled-cluster singles and doubles, SAPT2+3(CCD)δMP2)
- Interaction Region Indicator (IRI)
- Charge-transfer analysis
Main Results:
- Complexation with water can alter the relative weights of resonance structures by up to 32%.
- New resonance structures emerge in X/H2O complexes, involving water's outer-valence electrons.
- Supramolecular interactions significantly influence the electronic distribution and resonance patterns.
Conclusions:
- Supramolecular stabilization is a critical factor in modulating molecular resonance.
- This study provides a deeper understanding of resonance in noncovalently bonded systems.
- Findings can improve predictions of molecular behavior in complex chemical environments.
Keywords:
hydrogen bondsinteraction region indicatornoncovalent interactionsresonancesymmetry adapted perturbation theoryMore Related Videos
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