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Related Concept Videos

Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

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To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
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According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
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When a carbonyl compound is treated with a strong base, the α position gets deprotonated to give a resonance-stabilized intermediate called an enolate. Enolates are ambident nucleophiles because they possess two nucleophilic sites that can attack an electrophile owing to the delocalization of the negative charge between the α carbon and oxygen atoms. When the oxygen atom attacks an electrophile, it is called O-attack, whereas electrophilic attack via the α carbon is known as...
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The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
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Chemiluminescence-based Assays for Detection of Nitric Oxide and its Derivatives from Autoxidation and Nitrosated Compounds
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Electron Attachment to Nitric Oxide (NO) Controversy.

Ana I Lozano1, Juan C Oller2, Paulo Limão-Vieira3

  • 1Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas, Serrano 113-bis, Madrid 28006, Spain.

The Journal of Physical Chemistry. A
|February 28, 2025
PubMed
Summary

We measured total electron scattering cross sections for nitric oxide (NO) and found new resonance features. Our findings resolve a long-standing controversy regarding dissociative electron attachment (DEA).

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry
  • Chemical Physics

Background:

  • Nitric oxide (NO) is a key molecule in atmospheric and combustion chemistry.
  • Understanding electron interactions with NO is crucial for various scientific fields.
  • Previous studies on electron scattering from NO have shown discrepancies in resonance features.

Purpose of the Study:

  • To accurately measure total electron scattering cross sections (TCS) for nitric oxide (NO).
  • To investigate electron attachment resonances in NO.
  • To resolve the long-standing controversy surrounding dissociative electron attachment (DEA) cross-sections in NO.

Main Methods:

  • Utilized a magnetically confined electron transmission apparatus.
  • Measured TCS for NO in the impact energy range of 1 to 15 eV.
  • Analyzed resonance features within the TCS data.

Main Results:

  • Reported novel TCS data for NO with an accuracy of 5%.
  • Identified nine electron attachment resonance features, many reported for the first time.
  • Provided a comprehensive analysis of resonances at 7.0, 7.8, and 8.8 eV, resolving the DEA controversy.

Conclusions:

  • The new TCS data for NO show significant discrepancies with previous works.
  • The identified resonances offer new insights into electron-molecule interactions with NO.
  • This study resolves a 50-year-old debate concerning dissociative electron attachment in NO.