Preferred Label : selectivity factor;
Detailed label : selectivity factor, Sf;
IUPAC definition : A quantitative representation of selectivity in aromatic substitution reactions (usually
electrophilic, for monosubstituted benzene derivatives). If the partial rate factor,
f, expresses the reactivity of a specified position in the aromatic compound PhX relative
to that of a single position in benzene, then the selectivity factor S f (expressing
discrimination between i p /i - and i m /i -positions in PhX) is defined as: \[S_{f}
\log _{10}(\frac{f_{p} {{X}}}{f_{m} {{X}}})\];
Origin ID : S05567;
See also
A quantitative representation of selectivity in aromatic substitution reactions (usually
electrophilic, for monosubstituted benzene derivatives). If the partial rate factor,
f, expresses the reactivity of a specified position in the aromatic compound PhX relative
to that of a single position in benzene, then the selectivity factor S f (expressing
discrimination between i p /i - and i m /i -positions in PhX) is defined as: \[S_{f}
\log _{10}(\frac{f_{p} {{X}}}{f_{m} {{X}}})\]
