Krypton is a noble gas, meaning it is very unreactive and doesn't readily form compounds. However, under specific conditions, it can be forced to react and form a few compounds. Here are five examples:

1. Krypton difluoride (KrF2): This is the most well-known and stable compound of krypton. It is a colorless, volatile solid.

2. Krypton tetrafluoride (KrF4): This is a less stable compound than KrF2 and is only formed under extreme conditions.

3. Krypton hexafluoride (KrF6): This compound is extremely unstable and only exists in trace amounts.

4. Krypton tetrafluoroborate (KrBF4): This compound is formed by reacting KrF2 with boron trifluoride (BF3).

5. Krypton tetraoxotetrafluoride (KrO4F4): This compound is formed by reacting KrF2 with oxygen difluoride (OF2).

It's important to note that most of these compounds are highly reactive and unstable, making their synthesis and study challenging.