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Encyclopedia > Bond order

Bond order is the number of bonds between a pair of atoms. For example in nitrogen N:::N the bond order is 3, in acetylene H:C:::C:H the bond order between the two carbon atoms is 3 and the C:H bond order is 1. General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... The chemical compound acetylene, also called ethyne, was discovered in 1836 by Edmund Davy, in England; its chemical formula is C2H2 and its structure is: Acetylene is a colorless and extremely flammable gas at standard temperature and pressure, with a melting point of -80. ...


In a slightly more advanced context bond order need not be an integer. A good example of this is bonds between carbon in the molecule benzene where the delocalized molecular orbitals contain 6 pi electrons over six carbons essentially yielding half a pi bond. Together with the sigma bond the bond order is 1.5. Furthermore bond orders of 1.1 for example may be spoken about in more complex terms and are essentially refering to bond strength relative to B.O.=1 bonds. Benzene, C6H6, PhH, or benzol is a colorless and flammable liquid with a pleasant, sweet smell. ... Geometry of the water molecule Molecules have fixed equilibrium geometries--bond lengths and angles--that are dictated by the laws of quantum mechanics. ... Electron atomic and molecular orbitals, showing a Pi-bond at the bottom right of the picture In chemistry, pi bonds (π bonds) are bonds with a single nodal plane containing the line segment between the two atoms. ... Electron atomic and molecular orbitals, showing among others the sigma bond of two s-orbitals and a sigma bond of two p-orbitals In chemistry, sigma bonds (σ-bonds) are bonds where there is no nodal plane containing the line segment between the two bonded species. ...


In Molecular Orbital Theory bond order is also defined as the difference between the number of bonding electrons and the number of antibonding electrons, divided by two. This often but not always yields the same result as most simpler theories. In quantum chemistry, molecular orbitals are the statistical states electrons can have within molecules. ... In chemistry, valence electrons are the electrons contained in the valence shell (the outermost electron level) of an atom, and which are likely to participate in a chemical reaction through bonding with other atoms, molecules, or ions. ...


Bond order is an index of bond strength and is used extensively in valence bond theory. In chemistry, bond strength is measured between two atoms joined in a chemical bond. ... The valence bond theory considers that the overlapping atomic orbitals of the participating atoms form a chemical bond. ...


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Bond order - Wikipedia, the free encyclopedia (213 words)
For example in nitrogen N:::N the bond order is 3, in acetylene H:C:::C:H the bond order between the two carbon atoms is 3 and the C:H bond order is 1.
In Molecular Orbital Theory bond order is also defined as the difference between the number of bonding electrons and the number of antibonding electrons, divided by two.
Bond order is an index of bond strength and is used extensively in valence bond theory.
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