Does a divorce take place with the words "You are divorced - if Allah wills," if the husband intends to make the divorce contingent on the will of Allah and does not intend for it to take effect immediately?

Scholars have differed concerning the occurrence of a divorce conditioned upon the will of Allah. However, since you uttered the divorce due to your wife threatening to throw herself from the window, and you predominantly believed she would do so, your divorce is not effective. This is because such a situation is considered duress (ikrah), under which a divorce is not valid.