Ball-and-Stick molecular models are common aids used by students to help understand connectivity and Euclidean geometry in Organic Chemistry. However, BS models do not show atomic volume - essential for understanding steric effects. The space-filling atomic models of Stuart-Briegleb and later Corey-Pauling-Koltun, enabled students and researchers to construct organic molecules with precise dimensional and steric accuracy. A few CPK model sets are still available for purchase but are extremely cost-prohibitive for use on large scale and too small for visibility in the classroom. Fused Deposition modeling (FDM) 3D printers are now readily accessible for students and instructors quickly easily print space-filling molecular models from atomic coordinates. However, most 3D printed molecules are bespoke, rigid and do not move or rotate. Furthermore, the majority of consumer-grade printers print only a single color of filament which makes, for the untrained student, distinguishing the atomic or molecular identity difficult without painting. Here we present an updated 3D printed version of the classic CPK space-filling model set. These low-cost, accurate atomic models can be printed out on any FDM 3D printer at large scale (1 in = 1Å) for the construction of most small-molecule organic molecules.<br/>

3D printed space-filling molecular models

ACS Fall 2020 Virtual Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.