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 ...

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 ...

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 ...