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Related Concept Videos

Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
Resonance02:52

Resonance

The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

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.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
VSEPR Theory02:37

VSEPR Theory

Valence shell electron-pair repulsion theory (VSEPR theory) enables us to predict the molecular structure around a central atom from an examination of the number of bonds and lone electron pairs in its Lewis structure. The VSEPR model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between these electron pairs by maximizing the distance between them. The electrons in the valence shell of a central atom form either bonding...

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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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Published on: April 10, 2015

The Rh(100)-(3 × 1)-2O structure.

J Gustafson1, E Lundgren, A Mikkelsen

  • 1Division of Synchrotron Radiation Research, Lund University, Lund, Sweden. johan.gustafson@sljus.lu.se

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 9, 2012
PubMed
Summary
This summary is machine-generated.

Oxygen adsorption on Rh(100) surfaces was investigated. A new intermediate (3 × 1) structure at 2/3 monolayer coverage was identified alongside known structures.

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Area of Science:

  • Surface Science
  • Materials Science
  • Physical Chemistry

Background:

  • Understanding oxygen adsorption is crucial for catalysis and materials science.
  • The Rh(100) surface is a well-studied model system for adsorption studies.

Purpose of the Study:

  • To investigate oxygen adsorption structures on Rh(100).
  • To identify new adsorption phases and their coverages.

Main Methods:

  • High-resolution core-level spectroscopy
  • Low-energy electron diffraction (LEED)
  • Scanning tunneling microscopy (STM)

Main Results:

  • Identified known (2 × 2), (2 × 2)-pg, and c(8 × 2) structures at 0.25, 0.5, and 1.75 ML coverages.
  • Discovered a novel intermediate (3 × 1) structure at 2/3 ML coverage.

Conclusions:

  • The Rh(100) surface exhibits complex oxygen adsorption behavior.
  • A new ordered oxygen phase on Rh(100) has been characterized.