Duquel/ de qui avec les verbes

Question

I'm not entirely sure this correct. I was taught explicitly  that les pronoms relatifs composés are NOT used with verbs. If the «de» is attached to a verb one should always use «dont».

Answer

Here is a summary when to use dont and when duquel/de laquelle/desquels/desquelles:https://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-105504.php

Answer

My grammar book agrees with the Kwiziq lesson here, but says that dont is more common. Using duquel with a verb is perhaps largely restricted to literature. According to CNRTL, it can substitute for dont:

2. [En emploi littér., par souci de clarté; en fonction de compl. de subst., d'adj., de verbe ou de loc. verbale]

https://www.cnrtl.fr/definition/duquel