Grain size

McConnell equation describes the proportional dependence of the hyperfine splitting constant $a$ on the spin density $\rho$ (the probability of an unpaired electron being on a particular atom) in aromatic radical compounds such as benzene radical anion $C_{6}H_{6}^{-}$.

$a=Q\rho$

$Q$ is an empirical constant that can range from 2.0 to 2.5 mT.

History

The equation is named after Harden M. McConnell of Stanford University, who first presented it in 1956 in an article in the Journal of Chemical Physics.

References

Peter Atkins, Julio de Paula, Atkins' Physical Chemistry, 9th ed., Oxford University Press, Oxford, 14, 556 43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.