Frequently Asked Question

Diamagnetic correction is a correction applied to the measured magnetic susceptibility of a compound to account for the diamagnetic contribution of its constituent atoms. Here's how to calculate it:
1. Pascal's Constants: Use Pascal's constants, which are tabulated values representing the diamagnetic contribution of each atom or group in a molecule. These constants are usually given in units of 10^-6 cm^3/mol.
2. Summation: Add up the Pascal's constants for all the atoms in the molecule.
3. Diamagnetic Correction: The calculated sum represents the diamagnetic correction for the molecule.
For example, to calculate the diamagnetic correction for water (H2O), you would sum the constants for two hydrogen atoms and one oxygen atom. The diamagnetic correction can then be subtracted from the measured magnetic susceptibility to obtain the paramagnetic contribution.
Remember, diamagnetic correction is only relevant for paramagnetic compounds, which have unpaired electrons and exhibit a positive magnetic susceptibility.