Morning Overview on MSN

A 100-year-old chemistry rule just got shattered twice by new science

Chemistry students are taught that some molecular shapes are so strained they simply cannot exist. For about 100 years, one ...

A rule of chemistry stood for 100 years. Now, scientists have broken it—twice.

Researchers synthesized weird molecules that exist in three dimensions, breaking Bredt's rule and helping to develop future pharmaceuticals.
Science Daily

Scientists just overturned a 100-year-old rule of chemistry, and the results are “impossible”

Chemists at UCLA are showing that some of organic chemistry’s most famous “rules” aren’t as unbreakable as once thought. By ...

A year after undermining Bredt's rule, scientists make cage-shaped, double-bonded molecules that defy expectations

Organic chemistry is packed with rules about structure and reactivity, especially when it comes to making and breaking ...
Nanowerk

Electronegativity: Key Property of Periodic Table Elements and Its Impact on Chemical Bonding

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

Study reveals why light-driven chemical reactions often lose energy before bond-breaking

Florida State University researchers have discovered a pathway within a certain type of molecule that limits chemical ...
C&EN

Where the hydrogen bond ends and the covalent bond begins

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 ...