The alarm happened not to have gone off
Is this sentence grammatically correct?

The sentence means something like: it happened that the alarm didn’t go off.

But I want to use more complex grammar

Question

The alarm happened not to have gone off
Is this sentence grammatically correct?

The sentence means something like: it happened that the alarm didn’t go off.

But I want to use more complex grammar

Answer

This is unnatural but correct.  In a movie, a character might use this phrasing with a foreign accent to emphasize their foreigness.