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ChemistryJEE Main 8 Apr 2026, Shift 2·Q21·Numerical·Moderate

Coordination Compounds · Magnetic properties of complexes

Number of paramagnetic complexes among the following is .

[MnBrX4]X2−\ce{[MnBr4]^2-}, [NiClX4]X2−\ce{[NiCl4]^2-}, [Ni(CN)X4]X2−\ce{[Ni(CN)4]^2-}, [Ni(CO)X4]\ce{[Ni(CO)4]}, [CoFX6]X3−\ce{[CoF6]^3-}, [Fe(CN)X6]X4−\ce{[Fe(CN)6]^4-}, [Mn(CN)X6]X3−\ce{[Mn(CN)6]^3-}, [Ti(CN)X6]X3−\ce{[Ti(CN)6]^3-}, [Cu(HX2O)X6]X2+\ce{[Cu(H2O)6]^2+}, [Co(CX2OX4)X3]X3−\ce{[Co(C2O4)3]^3-}

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