Science, Maths & Technology
Understanding antibiotic resistance
...carbon atoms and one nitrogen atom. But even more importantly, note that as a four-membered ring, the bond angle now between the carbons-- instead of being like the tetrahedral carbon bond angle of 109 degrees, it's constrained to be just 90 degrees. That introduces what we call ring strain into the molecule. And it's a way in which molecules are encouraged, therefore, to...