What class do the following organic compounds do each belong and what is the IUPAC name --

1.........Br
........../
......./\
......|..|..(supposed to be a hexagon)
.......\/
........| Br

2. CH3CHClBr - I have 1-bromo-1-chlorothane, what is the class?

3. H....Cl
.....\.../
......C=C
....../..\
.....H...H, I have chloroethene, what is the class?