Cycloalkanes and Isomers

1.     Give the structural formula for the following compounds
        a)    trans-3,4,-dimethyl-cyclobut-1-ene
        b)    cyclobutyl-ethene

2.    Circle the folowing structures below that could have geometric cis-trans isomers.

a)

b)

c)

d)

e)

f)

g)

h)

i)

j)

3.   What is wrong (if anything) with the following names.

    a)    3-propylhexane            b)    4-methylpentane        c)    4,4-dimethyl-octane

    d)    2-chloro-4-bromo-4methyl-hexane                        e)    4-ethyl-butane

    f)    3,3-dimethyl-hexane        g)    3-methyl-6-ethyl-heptane

    h)    4-ethyl-6,6-dimethyl-heptane

4.    In each of the structures below indicate the following:
        i)  any isopropyl groups
        ii)  the number of primary (1o); secondary (2o); and tertiary (3o) carbon atoms.
             Any there any quaternary (4o) atoms?

5.     Draw all the isomers of the following molecular formulas. (The number of possible isomers is indicated in parentheses.  Name them as well.
    a)    C6H14 (5)        b)    C5H11Cl  (8)     c)  C3H6Cl2 (4)     d)  C3H8O (3)  

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