Wondered about this myself a while back and looked it up.
They’ve done the study. Would obviously mess up the power plant and take it offline, but wouldn’t breach the containment building.
Most of the exterior surface of the Towers were windows. Glass doesn’t stop much of anything, much less 5 ton pretty solid engines hitting at 586 mph, the speed the 2nd plane was clocked at.
http://www.cbsnews.com/news/speed-likely-factor-in-wtc-collapse-25-02-2002/
A 737 going 500mph I think would do more than just take it offline.