Is it possible to run taskkill to target a specific chrome window that was just opened?

I would like to do this just in case I’m working on something in a separate chrome window and don’t want to lose my progress.

What I’m trying to do is open 5 messenger chats at a time in a chrome window so I can msg clients, and then what I want is that chrome window to close and a new one to open with another 5 messenger chats. All while any other chrome window I opened prior is unaffected.

I know how to kill chrome completely and trigger a new 5 which is what I’ll do if this isn’t possible.