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Related Concept Videos

Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

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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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Halogens03:01

Halogens

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Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group. 
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Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

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Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
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Predicting Molecular Geometry

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VSEPR Theory for Determination of Electron Pair Geometries
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Exceptions to the Octet Rule

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Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
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Structural characterization of potassium salts of the decamethylmanganocene anion Cp*<sub>2</sub>Mn<sup></sup>.

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Related Experiment Video

Updated: Apr 4, 2026

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
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In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

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Structure investigations on oxygen fluorides.

Rupert Marx1, Konrad Seppelt

  • 1Institut fuer Chemie und Biochemie, Freie Universitaet, 14195 Berlin. seppelt@zedat.fu-berlin.de.

Dalton Transactions (Cambridge, England : 2003)
|September 10, 2015
PubMed
Summary

The crystal structure of dioxygen difluoride (O2F2) was determined at low temperatures. This molecule exhibits a hydrogen peroxide-like structure, differing from ozone and bromine monoxide structures.

Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Crystallography

Background:

  • The structure of dioxygen difluoride (O2F2) has been previously investigated using electron diffraction and microwave spectroscopy.
  • Oxygen difluoride (OF2) has a low melting point, necessitating specific techniques for structural determination.

Purpose of the Study:

  • To determine the crystal structure of O2F2 at low temperatures (-180 °C).
  • To compare the solid-state structure of O2F2 with related compounds like ozone and Br2O.
  • To investigate the oxidative properties of dissolved O2F in solution.

Main Methods:

  • Powder X-ray diffraction was used to determine the structure of OF2 due to its low melting point.
  • Crystal structure analysis of O2F2 was performed at -180 °C.

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
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In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Main Results:

  • The solid-state structure of O2F2 was found to be similar to that of hydrogen peroxide.
  • The structure of OF2 differs from the solid-state structures of ozone (O3) and bromine dioxide (Br2O).
  • Dissolved O2F oxidizes palladium to the Pd(IV) state, initially forming (O2(+)H3Pd2F12(-))n at low temperatures.

Conclusions:

  • O2F2 adopts a hydrogen peroxide-like structure in the solid state.
  • The structural characteristics of OF2 are distinct from those of O3 and Br2O.
  • O2F demonstrates significant oxidizing capabilities in solution, facilitating the formation of palladium complexes.