Yes you can but it's not advisable. Marinating frozen chicken and leaving it in the marinade to thaw in the fridge is possible. The downside is that your chicken will not retain much flavor from your marinade since the water that was frozen with your chicken will interact with the marinade and water it down which will make it bland. Your chicken will also be less tender and juicy since your marinade was not able to seep through your meat properly. If you choose to marinate frozen chicken, make sure to extend the marinating time.