phosphonium compound References phosphonium compound chemistry Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: phosphine…has been added) are called phosphonium compounds. The organic derivatives of phosphine are usually made by substitution reactions using the readily available phosphorus trichloride (PCl3). Read More…has been added) are called phosphonium compounds. The organic derivatives of phosphine are usually made by substitution reactions using the readily available phosphorus trichloride (PCl3). Read More