If benzene is attached to some other parent chain it is called phenyl , not benzyl, as you might expect. If two or more groups are attached to the benzene a. start numbering from the commonly named group, see rule 3. Naming polymers 1. See Table 13.2 page 342 in Stroker. Physical Properties Alkenes and Alkynes nonpolar, hydrophobic, less dense than water, soluble in nonpolar solvents like the alkanes.
Solubility depends on what kind of group attached to the benzene ring.
Generally less dense than water. Reactions Alkenes and Alkynes Alkenes and alkynes undergo the same kinds of reactions. These reactions are called addition reactions. Nothing is leaving the compound. The double bond is being changed to single bonds.