Computational Chemistry
Log-scale plot showing exponential growth of alkane isomer counts from C1 to C40

The Number of Isomeric Hydrocarbons of the Methane Series

Henze and Blair's 1931 JACS paper deriving exact recursive formulas for counting constitutional alkane isomers.

Computational Chemistry
Schematic showing atom-surface interaction using the method of images

Adsorption and Diffusion on Surfaces

Lennard-Jones's 1932 foundational paper introducing potential energy surface models to unify physical and chemical …