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Related Concept Videos

Acid Halides to Alcohols: LiAlH4 Reduction01:19

Acid Halides to Alcohols: LiAlH4 Reduction

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Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
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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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Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
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MO Theory and Covalent Bonding02:40

MO Theory and Covalent Bonding

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The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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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Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
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Related Experiment Video

Updated: May 4, 2026

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
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Li0.5Al0.5Mg2(MoO4)3.

Ines Ennajeh1, Mohamed Faouzi Zid1, Ahmed Driss1

  • 1Laboratory of Materials and Crystallochemistry, Faculty of Science of Tunis, University of Tunis ElManar, 2092 ElManar II Tunis, Tunisia.

Acta Crystallographica. Section E, Structure Reports Online
|January 16, 2014
PubMed
Summary

Researchers synthesized lithium/aluminium dimagnesium tetra-kis-[orthomolybdate(VI)] via solid-state reaction. Its crystal structure features linked octa-hedra and tetra-hedra forming a 3D framework with channels, where lithium and aluminium cations share positions.

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Crystallography

Background:

  • Molybdates are an important class of inorganic compounds with diverse applications.
  • Understanding the crystal structure of novel molybdates is crucial for predicting their properties.
  • The synthesis and characterization of mixed-cation molybdates can lead to new materials with tailored functionalities.

Purpose of the Study:

  • To synthesize and characterize the novel compound lithium/aluminium dimagnesium tetra-kis-[orthomolybdate(VI)].
  • To elucidate the crystal structure of the title compound using crystallographic methods.
  • To compare the structural features with related known compounds.

Main Methods:

  • Solid-state reaction route for synthesis.
  • Single-crystal X-ray diffraction for crystal structure determination.
  • Analysis of coordination environments and framework topology.

Main Results:

  • The title compound, lithium/aluminium dimagnesium tetra-kis-[orthomolybdate(VI)], was successfully synthesized.
  • The crystal structure consists of MgO6 octa-hedra and MoO4 tetra-hedra forming a 3D framework with channels along [001].
  • Lithium and aluminium cations occupy the same crystallographic site within a distorted trigonal-bipyramidal coordination.

Conclusions:

  • The title compound is isotypic with LiMgIn(MoO4)3, with specific site substitutions observed.
  • The 3D framework structure provides potential for ion exchange or guest molecule inclusion.
  • This study contributes to the understanding of structural diversity in orthomolybdate compounds.