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In chemistry, a carbene is a molecule containing a neutral carbon atom with a valence of two and two unshared valence electrons. The general formula is RRC:, but the carbon can instead be double-bonded to one group. The term "carbene" may also merely refer to the compound H2C:
R C CHN2 Oα-diazoketone R C CH N N ** + O -N2 R R C C C CH ** H O O
- Synthesis of analogues of carboxylic acids- Synthesis of amides from carboxylic acids- Synthesis of esters from carboxylic acids
SOCl2 R C OH R C Cl O O CH2N2 R C CH N N ** + O -N2 R R C C C CH ** H O O CH OH NH H2O 3 3 O O O R-CH2-C-NH2 R-CH2-C-OHR-CH2-C-O CH3