In literature, sometimes I find Chloroform, CCl4 and DCM classified as Polar aprotic and sometimes as non-polar. I am totally confused. Is there international approved classification of solvents according to polarity?!!!
No, there is no internationally approved classification of solvents. Their individual properties are diverse and continuous, covering multiple factors. "Polarity" itself is not an easily quantifiable single variable. Any particular classification would be a matter of relative convention.
Having said that, CCl4 should never be classified as polar aprotic.
Chloroform is somewhat non polar but DCM is decidedly borderline.
Thanks Eric. Do you recommend a collective reference from which i can find physicochemical parameters of all solvents e.g. Dielectric constant, Dipole moment, refarctive index, catalan parameters, kamlet-Taft parameters, ....... etc
Unfortunately, no. I often find it difficult to find a good collection of all the solvent parameters that I wish to consider, particularly when it comes to polarity. Fortunately a well placed Google search is often sufficient when looking for particulars.
- Badges
- Science topic