Check for collision while animating

I have an animation 0.24 sec long (Hammer Hitting). All I want to do is check if the hammer collider collided while playing animation and do something, and do something else if the animation finished without colliding sounds simple but I dont know why its not working currently I am starting a function (Lets call it function A) that runs yield WaitForSeconds(0.24); at the same time I call anim.SetTrigger("HammerHit");(When the mouse is clicked) and on OnCollisionEnter I have a bool called col that turns true if collided and that's how I know a collision happend , after yield WaitForSeconds(0.24); if col = false that means no collision happens that's basically what I have. Whats currently happens is it most of the time works,Great. But some times it dose what is on function A after yield WaitForSeconds(0.24); (which suppose to happen only if there is no collision) and at the same time it dose whats on OnCollisionEnter (which suppose to happen only if there is a collision) am sure am doing it long or in a wrong way but basically what I want is Do something if collided while animating and do something else (after animation is done) if there is NO collision while animation