You Do Need power plug adapter while traveling from Puerto Rico to Syria.

Here is Why You Need An Adapter

The outlet and plug type used in Syria are C, E and L and in Puerto Rico are A and B. This is how they look like.

Puerto Rico

In Puerto Rico, outlets of type A and B are in use.

Type A

Type B

Syria

In Syria, outlets of type C, E and L are in use.

Type C

Type E

Type L