Physical organic chemistry

Physical organic chemistry

Physical organic chemistry is the study of the interrelationships between structure and reactivity in organic molecules. It a part of organic chemistry by using tools of physical chemistry such as chemical equilibrium, chemical kinetics, thermochemistry, and quantum chemistry.

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Physical organic chemistry

Bond

Chemistry; Physical organic chemistry

There is a chemical bond between two atoms or groups of atoms in case that the forces acting between them are such as to lead to the formation of an aggregate with sufficient stability to make it ...

Bond-dissociation energy

Chemistry; Physical organic chemistry

The enthalpy (per mole) required to break a given bond of some specific molecular entity by homolysis, e.g. for CH 4 → H 3 C . + H . symbolised as D(CH 3 -H) (cf. heterolytic bond-dissociation ...

Bell-Evans-Polanyi principle

Chemistry; Physical organic chemistry

The linear relation between energy of activation (E a ) and enthalpy of reaction (ΔH r ) sometimes observed within a series of closely related reactions. E a = A + BΔH r

Bond number

Chemistry; Physical organic chemistry

The number of electron-pair bonds between two nuclei in any given Lewis formula. For example in ethene the bond number between the carbon atoms is two, and between the carbon and hydrogen atoms is ...

Benzyne

Chemistry; Physical organic chemistry

1,2-Didehydrobenzene (the aryne derived from benzene) and its derivatives formed by substitution. The terms m- and p-benzyne are occasionally used for 1,3- and 1,4-didehydrobenzene, respectively.

Chemical species

Chemistry; Physical organic chemistry

An ensemble of chemically identical molecular entities that can explore the same set of molecular energy levels on the time scale of the experiment. The term is applied equally to a set of chemically ...

Chemical relaxation

Chemistry; Physical organic chemistry

If the equilibrium mixture of a chemical reaction is disturbed by a sudden change, especially of some external parameter (such as temperature, pressure, or electrical field strength), the system will ...