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Videos de Conceptos Relacionados

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:
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...
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.
Types of Semiconductors01:20

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
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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Video Experimental Relacionado

Updated: Jul 12, 2026

Fabrication and Optimization of Type II Silicon Clathrate Films
06:53

Fabrication and Optimization of Type II Silicon Clathrate Films

Published on: October 14, 2025

Compuestos aislables que contienen un enlace doble silicio-silicio.

R West

    Science (New York, N.Y.)
    |September 14, 1984
    PubMed
    Resumen

    Los compuestos estables de disileno, con enlaces dobles silicio-silicio, han sido sintetizados después de 70 años. Estos compuestos comparten similitudes, pero también exhiben diferencias clave en comparación con los alquenos orgánicos.

    Área de la Ciencia:

    • Química del organosilicio y su química.
    • Química inorgánica y inorgánica.

    Sus antecedentes:

    • La síntesis de compuestos estables con enlaces dobles silicio-silicio (disilenos) ha sido un desafío de larga data en la química.
    • Los disilenos son análogos de silicio de los alquenos, compuestos que contienen enlaces dobles carbono-carbono.

    Objetivo del estudio:

    • Para informar sobre la síntesis exitosa de compuestos estables de disileno.
    • Investigar las propiedades estructurales y químicas de estos nuevos disilenos.

    Principales métodos:

    • Síntesis de nuevos compuestos orgánicos de silicio.
    • Caracterización mediante técnicas espectroscópicas y cristalográficas.

    Principales resultados:

    • Varios compuestos estables de disileno fueron sintetizados con éxito después de décadas de esfuerzo.

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  • El análisis estructural reveló similitudes y diferencias notables en comparación con los alquenos orgánicos.
  • Los estudios de reactividad química destacaron las vías de reacción únicas para los disilenos.

    • Conclusiones:

    • La síntesis de disilenos estables marca un avance significativo en la química del organosilicio.
    • Los disilenos presentan una clase única de compuestos con propiedades distintas en comparación con sus contrapartes orgánicas, abriendo nuevas vías para la investigación.