Is it permissible for a father to swear an oath of divorce upon his daughter that she not marry a certain person, and upon his wife that she not attend their daughter's wedding, knowing that he rejects the marriage for financial and personal reasons?

The father does not have the right to prevent his son from marrying whom he desires without a legitimate religious reason. The son is not obligated to obey his father in this regard, as long as the girl is of good character and religious.

If the parents' opinion is not religious, but rather for a personal interest, and the marriage involves compatibility and righteousness, then there is no sin in disobeying the parents.

The questioner should seek a verbal fatwa from trustworthy scholars regarding the divorce oath.