21 September '05
1. Write the structures of these molecules
a) 3,4-dicloroeptanale b) acid 3-amino-2-chloro-4-etilbenzoico c) 1,2,2-trimetilcicloutanolo d) (2Z)-4-methyl -2 pentene e) 5-metilciclopent en-2-amino-1-f) How many stereoisomers of the molecule and there)?
2. Identify all the functional groups present in vitamin A (retinol), whose structure is as follows.
1. Write the structures of these molecules
a) 3,4-dicloroeptanale b) acid 3-amino-2-chloro-4-etilbenzoico c) 1,2,2-trimetilcicloutanolo d) (2Z)-4-methyl -2 pentene e) 5-metilciclopent en-2-amino-1-f) How many stereoisomers of the molecule and there)?
2. Identify all the functional groups present in vitamin A (retinol), whose structure is as follows.
3. Write entries for the second increasing acidity of the molecules listed below: a) 4-nitrophenol b) 4-methylphenol; c) 2-methyl-cyclohexanol; d) acid 3-fluoropropanoico e) cloroesanoico acid 2-f) 1, 1.2-trimetilciclobutano;
4. Explain the difference in acidity observed in the propane CH3-CH2-CH3 (pKa = 50) propylene, CH3-CH = CH2 (pKa = 40) and propina CH3-C ≡ CH (pKa = 30).
5. Write the structure of a) an L-amino acid, b) a D-chetoesoso c) a diglyceride d) a nucleoside; e) an ester.
4. Explain the difference in acidity observed in the propane CH3-CH2-CH3 (pKa = 50) propylene, CH3-CH = CH2 (pKa = 40) and propina CH3-C ≡ CH (pKa = 30).
5. Write the structure of a) an L-amino acid, b) a D-chetoesoso c) a diglyceride d) a nucleoside; e) an ester.
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