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Related Concept Videos

2° Amines to N-Nitrosamines: Reaction with NaNO201:20

2° Amines to N-Nitrosamines: Reaction with NaNO2

Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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.
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:
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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Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
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NaFe(TeO(3))(2).

Matthias Weil1, Berthold Stöger

  • 1Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria.

Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
PubMed
Summary
This summary is machine-generated.

Sodium iron tellurate, a new material, forms corrugated layers. These layers are linked by sodium cations, creating a unique crystal structure with potential applications in materials science.

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Crystallography

Background:

  • The synthesis and structural characterization of novel inorganic compounds are crucial for advancing materials science.
  • Layered structures offer unique properties and potential applications in various fields.

Purpose of the Study:

  • To synthesize and characterize a new hydro-thermally prepared compound, sodium iron(III) bis-[trioxotellurate(IV)].
  • To elucidate the crystal structure and bonding of the title compound.

Main Methods:

  • Hydro-thermal synthesis.
  • Single-crystal X-ray diffraction analysis.
  • Structural analysis of coordination polyhedra and layer formation.

Main Results:

  • The title compound, sodium iron(III) bis-[trioxotellurate(IV)], was successfully prepared via hydro-thermal synthesis.
  • The crystal structure is isotypic with its Gallium(III) analogue, featuring corrugated [FeTe(2)O(6)](-) layers.
  • These layers consist of edge-shared iron(III) octa-hedral dimers and tellurium(IV) trigonal pyramids, with sodium cations linking adjacent layers via [NaO(8)] polyhedra.

Conclusions:

  • The hydro-thermal method is effective for synthesizing sodium iron(III) bis-[trioxotellurate(IV)].
  • The compound exhibits a layered structure with specific arrangements of iron, tellurium, and sodium polyhedra.
  • The structural insights provide a foundation for exploring potential applications of this novel material.