Preferred Label : polarizability;
IUPAC definition : The ease of distortion of the electron cloud of a molecular entity by an electric
field (such as that due to the proximity of a charged reagent). It is experimentally
measured as the ratio of induced dipole moment (µ ind) to the field E which induces
it: \[\alpha \frac{μ _{{ind}}}{E}\] The units of α are C2 m2 V-1. In ordinary usage
the term refers to the 'mean polarizability', i.e., the average over three rectilinear
axes of the molecule. Polarizabilities in different directions (e.g. along the bond
in Cl sub 2 /sub , called 'longitudinal polarizability', and in the direction perpendicular
to the bond, called 'transverse polarizability') can be distinguished, at least in
principle. Polarizability along the bond joining a substituent to the rest of the
molecule is seen in certain modern theoretical approaches as a factor influencing
chemical reactivity, etc., and parametrization thereof has been proposed.;
Origin ID : P04711;
See also
The ease of distortion of the electron cloud of a molecular entity by an electric
field (such as that due to the proximity of a charged reagent). It is experimentally
measured as the ratio of induced dipole moment (µ ind) to the field E which induces
it: \[\alpha \frac{μ _{{ind}}}{E}\] The units of α are C2 m2 V-1. In ordinary usage
the term refers to the 'mean polarizability', i.e., the average over three rectilinear
axes of the molecule. Polarizabilities in different directions (e.g. along the bond
in Cl sub 2 /sub , called 'longitudinal polarizability', and in the direction perpendicular
to the bond, called 'transverse polarizability') can be distinguished, at least in
principle. Polarizability along the bond joining a substituent to the rest of the
molecule is seen in certain modern theoretical approaches as a factor influencing
chemical reactivity, etc., and parametrization thereof has been proposed.
