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Kapitel 9

Chemische Bindungen: Grundlegende Konzepte

Arten chemischer Bindungen
Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type…
Lewis-Symbole und die Oktettregel (Erdgasregel)
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis…
Ionenbindung und Elektronentransfer
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…
Der Born-Haber-Kreisprozess
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a…
Trends in der Gitterenergie: Ionengröße und Ladung
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a…
Kovalente Bindung und Lewis-Strukturen
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual…
Elektronegativität
Whether a bond is nonpolar or polar covalent is determined by a property of the bonding atoms called electronegativity.  Electronegativity…
Bindungspolarität, Dipol-Moment und prozentualer Ionencharakter
The absolute value of the difference in electronegativity (ΔEN) of two bonded atoms provides a rough measure of the polarity to be expected…
Lewis-Strukturen molekularer Verbindungen und mehratomiger Ionen
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined: Determine the…
Resonanz
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…
Formelle Ladungen
In some cases, there are seemingly more than one valid Lewis structures for molecules and polyatomic ions. The concept of formal charges can be used…
Ausnahmen von der Oktettregel
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three…
Bindungsenergien und Bindungslängen
Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break…
Bindungen bei Metallen
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the…

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