Nomenclature (Simple)anhydrides are simply named by replacing the -acid suffix of the parent carboxylic acids with the word anhydride. E.g. 09 09 HgC-C-O-C-CHs CHgCH2-C-O-C-CF3 ethanoic anhydride trifluoroethanoic propanoic anhydride Mixed anhydrides that consist of two different acid derived parts are named using the names of the two individual acids,with the highest priority acid being the first name. Nomenclature of Multifunctional Compounds We have now covered a wide variety of functional groups,and 'real'molecules contain many of these different functionalities. How do we go about correctly naming these molecules? In choosing the principal group for the root name,the following priorities are observed. Acid ester amide nitrile aldehyde ketone alcohol amine alkene alkyne alkane ethers>halides Ch21 Carboxylic acid Derivatives(landscape) Page 11Ch21 Carboxylic acid Derivatives(landscape) Page 11 Nomenclature (Simple) anhydrides are simply named by replacing the -acid suffix of the parent carboxylic acids with the word anhydride. E.g. Mixed anhydrides that consist of two different acid derived parts are named using the names of the two individual acids, with the highest priority acid being the first name. Nomenclature of Multifunctional Compounds We have now covered a wide variety of functional groups, and 'real' molecules contain many of these different functionalities. How do we go about correctly naming these molecules? In choosing the principal group for the root name, the following priorities are observed. Acid > ester > amide > nitrile > aldehyde > ketone > alcohol > amine > alkene > alkyne > alkane > ethers > halides H3C C O O C O CH3 ethanoic anhydride CH3CH2 C O O C O CF3 trifluoroethanoic propanoic anhydride