1. The molecular formula C3H6Br2 is that of 2,2-Dibromopropane but it could
also be that of other organic molecules. What type of isomerism is being
described in this situation? Draw all possible isomers of this compound.
2. Explain how an enantiomer and a diastereomer differ from each other. Give
an example of an everyday object that might help you better illustrate the
difference between these two types of isomers.
Stereoisomers are broken into two categories, enantiomers and diastereomers.
Stereoisomer compounds with molecules that are not mirrored images of one
another and also not superimposable are Diastereomers. They have different
physical and chemical properties. An example of this is sugars and amino acids.
Chiral molecule that are mirror images of one another and also superimposable
are Enantiomers. They have identical physical and chemical properties and bend
light in opposite directions. An example of this your hands they are very similar to
each other but there not the same.
3.Write structural formulas and the IUPAC names for three constitutionals (i.e.
structural) isomers with the molecular formula C9H20. (3 points)
4.Write the structural formulas for the two geometric isomers of 2,3dibromomethylhex-2-ene. Write the names for both isomers.
5. Give systematic IUPAC names for each of the following: (0.5 points each)
6. Write structural formulas of isomers with the same molecular formula of
C5H12O for: (1 point each)
a) one primary alcohol - 1-Pentanol: CH3(CH2)3CH2OH
b) one secondary alcohol- 2-Pentanol: CH3(CH2)2CHOHCH3
c) one tertiary alcohol-
2-Methyl-2-butanol:
7. Explain the difference between a secondary amide and a secondary amine. Your
explanation must contain an example of each.
Amide and Amine are nitrogenous compounds however their structures and
properties differ. Secondary amines have two organic substituents bound to the
nitrogen together with one hydrogen. An example of a secondary amine is
dimethylamine. Secondary amides are amides in which the nitrogen atom is
directly bonded to two carbon atoms, the carbonyl group plus one other carbon. An
example of a secondary amide is benzamide.
8. Draw both the condensed (ie, CH3CH2CH3) and the structural formula (hand
drawn) for
each of the following compounds: (2 points each)
a) 2,2-dimethyl-3-ethylpentane
b) 2,3-butandiol
c) trans-5-methyl-2-heptene
d) 6-chloro-2-methyl-3-heptyne
e) 1,2-dicholorobenzene
9.Aspartame is an artificial sweetener that became increasingly common in the 1990's. Below
you will find the structure of aspartame. Circle all of the functional groups found on this
molecule, and clearly name each functional group. (5 points)