Organic compounds?
                  Organic compounds?
                                  (1)
                                  (1)
     Past :
     Past :
                               organic
                               organic
                                    ↓
                                    ↓
          organic substances could originate only 
          organic substances could originate only 
                        from living material
                         from living material
                                                                    2
                                                                    2
                  Organic compounds?
                  Organic compounds?
                                  (2)
                                  (2)
     Friedrich Wöhler, a German chemist, did an 
     Friedrich Wöhler, a German chemist, did an 
       experiment (1828) :
        experiment (1828) :
       the inorganic, or mineral, substance called 
        the inorganic, or mineral, substance called 
       ammonium cyanate could be converted in 
        ammonium cyanate could be converted in 
       the laboratory to urea, an organic 
        the laboratory to urea, an organic 
       substance found in the urine of many 
        substance found in the urine of many 
       animals.  
        animals.  
                                                                    3
                                                                    3
                  Organic compounds?
                  Organic compounds?
                                  (3)
                                  (3)
                               organic
                               organic
                                    ↓
                                    ↓
          organic substances could originate only 
          organic substances could originate only 
                        from living material
                         from living material
                                                                    4
                                                                    4
      Definition of organic chemistry 
       Definition of organic chemistry 
     Organic chemistry is the branch of chemistry 
     Organic chemistry is the branch of chemistry 
        in which carbon compounds and their 
        in which carbon compounds and their 
        reactions are studied, but does not imply 
        reactions are studied, but does not imply 
        that these compounds must originate from 
        that these compounds must originate from 
        some form of life. 
        some form of life. 
                                                                    5
                                                                    5
                             Classes
                              Classes
                                  (1)
                                  (1)
     Alkane                      RH
        Alkane                    RH
     Alkene                      R-CH=CH
        Alkene                    R-CH=CH
                                                2
                                                2
     Alkyne                      R-C≡C-H
        Alkyne                    R-C≡C-H
     Alkyl halide                RX
        Alkyl halide              RX
     Alcohol                     ROH
        Alcohol                   ROH
     Ether                       R-O-R
        Ether                     R-O-R
     Aldehyde                    R-C=O
        Aldehyde                  R-C=O
                                      │
                                      │
                                      H
                                      H
                                                                    6
                                                                    6