Write structure for the compound shown below: (a) 1-bromo-3-methylbenzene.

Write structure for the compound shown below: (b) 1-chloro-2-propylbenzene.

The polymer whose structure is shown below is made from two different monomers. Identify the monomers.

In which of the molecules below is the carbon-carbon distance the shortest?

A) $\ce{H2C=CH2}$

B) $\ce{H-C≡C-H}$

C) $\ce{H3C-CH3}$

D) $\ce{H2C=C=CH2}$

E) none of above

Use the $\delta$+/$\delta$- convention to indicate the direction of expected polarity for each of the bonds indicated. (a) H3C–Cl (b) H3C–NH2 (c) H2N–H (d) H3C–SH (e) H3C–MgBr (f) H3C–F

Classify each organic compound as a hydrocarbon or a functionalized hydrocarbon. For functionalized hydrocarbons, identify the compound's family.

a. $\ce{H3C-CH2OH}$

b. $\ce{H3C-CH3}$

c. $\ce{H3C-CO-CH2-CH3}$

d. $\ce{H3C-NH2}$

Cocaine is a widely abused, addicting drug. Cocaine is usually obtained as its hydrochloride salt (cocaine hydrochloride, an ionic salt). This salt can be converted to crack (a neutral molecule) by treatment with base.
a. Identify the functional groups in cocaine.
b. Given what you have learned about ionic and covalent bonding, which of the two compounds—crack or cocaine hydrochloride—has a higher boiling point?
c. Which compound is more soluble in water?
d. Can you use the relative solubility to explain why crack is usually smoked but cocaine hydrochloride is injected directly into the bloodstream?

Circle the functional groups in the following structures. State to which class (or classes) of compounds the structure belongs.

The structure below is a pentose sugar and does not have stereochemistry specified.

Reduction of the aldehyde functional group results in the structure below. How many different stereoisomers exist for this structure?

Identify the functional groups in cocaine. COC(=O)C1C2CCC(C2)N1C Cocaine Alkanes and Their Names (Sections 23.1, 23.3)

What are the functional groups in the molecule of cocaine?

Write the structural formula of 5-ethyl-2,6-dimethyloctane.

What do "saturated" and "unsaturated" mean when applied to hydrocarbons? Give examples of a saturated hydrocarbon and an unsaturated hydrocarbon.

Comment on the extra stability of benzene compared to ethylene. Why does ethylene undergo addition reactions while benzene usually undergoes substitution reactions?