The correct IUPAC name of [NiCl₂(PPh₃)₂] is
A{'text': 'Dichloridonickel(II) triphenylphosphine', 'label': 'A'}
B{'text': 'Dichloridobis(triphenylphosphine)nickel(II)', 'label': 'B'}
C{'text': 'Bis(triphenylphosphine)nickeldichloride', 'label': 'C'}
D{'text': 'Nickel(II) chloride phosphine complex', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'Dichloridobis(triphenylphosphine)nickel(II)', 'label': 'B'}
1. Ligands are alphabetised: chloro (or chlorido) comes before triphenylphosphine.
2. The prefix "bis" (not di) is used for ligand names already carrying a numeric prefix.
3. Oxidation state of Ni is +2, indicated in Roman numerals.
4. So NCERT names it dichloridobis(triphenylphosphine)nickel(II).
_Source: NCERT Class 12 Chemistry, Unit 5 "Coordination Compounds", §5.3.2(iv)_
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