Computational models challenge century-old organic chemistry concept

An international research team, including scientists from Cardiff University and the University of Newcastle in Australia, has used computational modeling to challenge a century-old concept in organic chemistry: the inductive effect.

Traditionally, chemistry textbooks have taught that the inductive effect—the way atoms influence electron distribution within a molecule—extends across several chemical bonds, weakening as the distance from the electronegative element increases. However, new research utilizing Density Functional Theory (DFT) suggests this reach is much shorter than previously believed.

The findings indicate that in neutral molecules, the effect may effectively end after only a single bond rather than persisting through three or four bonds as commonly taught. This discrepancy suggests that long-standing explanations regarding the structure, reactivity, and charge distribution of organic molecules may require re-evaluation. While the effect itself remains a fundamental principle, the scientific community may need to revise how it is taught and applied in fields such as pharmacology, materials science, and agrochemicals.