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When two ligand names need numerical prefixes (e.g. 'ethylenediamine' which already has a number prefix in its name), the prefixes used are:
Adi, tri, tetra
Bbis, tris, tetrakis (used with the ligand in parentheses)
Cmono, di, tri
Done, two, three
Answer & Solution
Correct answer: B. bis, tris, tetrakis (used with the ligand in parentheses)
Use **bis, tris, tetrakis** for ligands whose names themselves contain numerical prefixes (like 'di-' in ethylenediamine), to avoid ambiguity: e.g. *bis*(ethylenediamine) not *di*ethylenediamine.
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