A team of chemists at the Van ‘t Hoff Institute for Molecular Sciences of the University of Amsterdam, the Netherlands, has designed and synthesized a new class of molecules: quasi[1]catenanes. These pretzel-like molecules consist of two molecular rings ‘oppositely’ coupled at a central carbon atom. The research is published in the journal Nature Communications. Sketches of the quasi[1]catenane and quasi[1]rotaxane geometries: these are, together...
![Quasi[1]catenane. Image credit: Steemers et al, doi: 10.1038/ncomms15392.](https://cdn.sci.news/images/2017/05/image_4894f-Quasi-1-catenanes-370x215.jpg)