The latest short science news items from C&EN. Open an introductory chemistry textbook. What is a covalent bond? A covalent bond occurs when atoms share electrons in a molecule. What is a hydrogen ...

Hydrogen bonds are at the very core of life as we know it, and now for the first time ever scientists have managed to visualize these transient molecular associations. This technique can be used to ...

Figure 1: Examples of triple hydrogen-bond arrays and their association constants in various solvents. Figure 6: UV/vis competition experiment in which 13 is displaced from 12·13 by a large excess of ...

A new catalyst for breaking the tough molecular bond between carbon and hydrogen holds the promise of a cleaner, easier, cheaper way to derive products from petroleum, say researchers. Simple, ...

Chemistry students the world over are familiar with covalent bonds and hydrogen bonds. Now a study has revealed a strange variety of bond that acts like a hybrid of the two. Its properties raise ...