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Related Concept Videos

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
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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.
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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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Molecular Orbital Theory II

Molecular Orbital Energy Diagrams
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by water loss...

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The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
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The (SO2)2N3- anion.

Karl O Christe1, Michael Gerken, Ralf Haiges

  • 1Loker Hydrocarbon Research Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA. karl.christe@edwards.af.mil

Inorganic Chemistry
|April 16, 2003
PubMed
Summary
This summary is machine-generated.

The novel bis(sulfur dioxide) azide anion, (SO2)2N3-, has been structurally characterized. This new anion features both sulfur dioxide ligands coordinated to a terminal nitrogen atom of the azide group.

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Area of Science:

  • Inorganic Chemistry
  • Crystal Engineering
  • Anion Synthesis

Background:

  • The azide anion (N3-) is a versatile ligand in coordination chemistry.
  • Sulfur dioxide (SO2) is known to react with various nucleophiles.
  • The formation of sulfur dioxide adducts with nitrogen-containing anions is an area of emerging research.

Purpose of the Study:

  • To structurally characterize the recently proposed bis(sulfur dioxide) azide anion, (SO2)2N3-.
  • To elucidate the coordination mode of SO2 ligands to the azide anion.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the crystal structure of the cesium salt, [Cs][(SO2)2N3].
  • Crystallographic data were collected at low temperature (130 K) for precise structural determination.

Main Results:

  • The crystal structure of [Cs][(SO2)2N3] was successfully determined, confirming the existence of the (SO2)2N3- anion.
  • The unit cell parameters are: P2(1)/c, a = 8.945(2) A, b = 10.454(2) A, c = 8.152(2) A, beta = 109.166(3) degrees, Z = 4.
  • The X-ray diffraction data yielded a final R1 factor of 0.0329.
  • In the (SO2)2N3- anion, both SO2 ligands are coordinated to a single terminal nitrogen atom of the N3- moiety.

Conclusions:

  • The structural characterization confirms the novel coordination of sulfur dioxide to the azide anion.
  • The bis(sulfur dioxide) azide anion represents a new class of inorganic compounds with potential applications in synthesis and materials science.