If you get 2x di in succession in a systematic name, this sounds a bit strange. For example, Hg(H2PO4)2 would then be named mercury diphosphate. Suppose you are not allowed to use the stock notation, is this name correct? Another example is Pb(Cr2O7)2.
Asker: Hilde, 42 years old
Answer
Hi Hilde,
Complex substituents use the prefixes “bis”, “tris”, “tetrakis”. The mercury compound is therefore called mercury bis(dihydrogen phosphate) and the lead compound lead bis(dichromate). The substituent that comes after bis etc. is placed in parentheses.
Of course, the Stock notation is simpler in most cases.
Answered by
Dr. Etienne Jooken
Chemistry
Catholic University of Leuven
Old Market 13 3000 Leuven
https://www.kuleuven.be/
Old Market 13 3000 Leuven
https://www.kuleuven.be/
.