1.Draw the structure of this compound:
p-divinylbenzene
(This compound is used in the manufacture of polystyrene. It crosslinks the chains of polystyrene and imparts stiffness to them.)

2.Draw the structure of this compound:
sodium cyclopentadienide (draw it as a salt, not as a covalent compound)

sodium cyclopentadienide
Cyclopenta  means ring of 5 and dienylide means two double bonds ,ide here means a negative charge on the ring and Na+
Check the attached file

ok you know that vinyl is CH2=CH-   group ..you just need to put two such groups on the benzene at 1,4 position (para)

here is the structure of p-divinylbenzene

here is structure