In chemistry, a carbene's a organic molecule containing a carbon atom with six valence electrons and having the general formula RR'C:. Carbenes are classified into two varieties, singlets and triplets. Most carbenes are very short lived, although persistent carbenes are known. The prototypical carbene's H2C: also called methylene. One well studied carbene's Cl2C:, or dichlorocarbene, which can be generated in situ from chloroform and a strong base. Structure and bonding The two classes of carbe… (More on Carbene)