He imagined that his wife was standing in front of him and he spoke to her in a way that he fears constitutes a divorce

No File Exists
Check below answers in case you are looking for other related questions:
Divorce does not take place on the basis of a decision or intention unless the words are uttered
When a Muslim signs papers divorcing his wife in front of a non-Muslim judge

No File Exists
Related Answers:
Can the qaadi (judge) annul a marriage without the husband being present?
He said to his wife: If you check my mobile phone you are divorced
Is it permissible to divorce a woman who is breastfeeding?
Divorce does not take place on the basis of a decision or intention unless the words are uttered
When a Muslim signs papers divorcing his wife in front of a non-Muslim judge

Recommended answers for you:
Making up prayers at times when prayer is disallowed
Does ‘iddah apply in the case of khula’?
Ways of protecting oneself from nightmares and disturbing dreams
Suffering From Waswas (Insinuating Whispers) of the Shaytan About the Essence of Allah
Why does Islam forbid lesbianism and homosexuality?