Related topics from Britannicachemical bonding
The language that molecular orbital theory brings to chemistry is that of bonding and antibonding orbitals and delocalization of electrons. The theory is presented here as an alternative to valence ...
chemical bonding
The basis of VB theory is the Lewis concept of the electron-pair bond. Broadly speaking, in VB theory a bond between atoms A and B is formed when two atomic orbitals, one from each atom, merge with ...
chemical bonding
The description of the planar hexagonal benzene molecule, C6H6, illustrates another aspect of VB theory. Each of the six carbon atoms is taken to be sp2 hybridized. Two of the hybrid orbitals are ...
electricity
Consider a circuit consisting of a capacitor and a resistor that are connected as shown in . What will be the voltage at point b if the voltage at a is increased suddenly from Va = 0 to Va = +50 ...
chemical bonding
The alternative quantum mechanical theory of the electronic structures of molecules is MO theory. This approach was introduced about the same time as VB theory but has proved more amenable to ...
coordination compound
Several theories currently are used to interpret bonding in coordination compounds. In the valence bond (VB) theory, proposed in large part by the American scientists Linus Pauling and John C. ...
chemical bonding
The discussion is not yet complete, however. If this description of carbon were taken at face value, it would appear that, whereas three of the CH bonds in methane are formed from carbon 2p orbitals, ...
chemical bonding
As an illustration of the VB procedure, consider the structure of H2O. First, note that the valence-shell electron configuration of an oxygen atom is 2s22px22py12pz1, with an unpaired electron in ...
chemical bonding
Valence bond theory runs into an apparent difficulty with CH4. The valence-shell electron configuration of carbon is 2s22px12py1, which suggests that it can form only two bonds to hydrogen atoms, in ...
chemical bonding
As a first illustration of this procedure, consider the structures of the diatomic molecules formed by the period-2 elements (such as N2 and O2). Each valence shell has one 2s and three 2p orbitals, ...
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