Amongst [NiCl(4)]^(2-), [Ni(H(2)O)(6)]^(...

Amongst `[NiCl_(4)]^(2-), [Ni(H_(2)O)_(6)]^(2+), [Ni("PP"h_(3))_(2)Cl_(2)], [Ni(CO)_(4)]` and `[Ni(CNO_(4))]^(2-)` the paramagnetic species are

`[NiCl_(4)]^(2-),[Ni(H_(2)O)_(6)]^(2+), [Ni("PP"h_(3))_(2)Cl_(2)]`

`[Ni(CO)_(4)], [Ni("PP"h_(3))_(2)Cl_(2)], [NiCl_(4)]^(2-)`

`[Ni(CN)_(4)]^(2-), [Ni(H_(2)O_(6)]^(2+),[NiCl_(4)]^(2-)`

`[Ni"PP"h_(3))_(2)Cl_(2)], [Ni(CO)_(4)],[Ni(CN)_(4)]^(2-)`

Text Solution

Verified by Experts

`Ni^(2+)=3d^(8)4s^(0)`
(i) `[NiCl_(4)]^(2-)toCl^(-)` is weak ligand (spectrochemical sereis), so no pairing possible.
CFSE < pariring energy.
(ii) `[Ni(H_(2)O)_(6)]^(2+)toH_(2)O` is weak field ligand. So,no pairing possible.
CFSE < Pairing energy.
(iii) `[Ni("PP"h_(3))_(2)Cl_(2)]to` Although `"PP"h_(3)` had d- acceptance but presence of Cl makes complex tetrahedral.

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Amongst [NiCl_(4)]^(2-), [Ni(H_(2)O)_(6)]^(2+), [Ni(PPh_(3))_(2)Cl_(2)], [Ni(CO)_(4)] and [Ni(CN)^(2-) the paramagnetic species are

`[NiCl_(4)]^(2-), [Ni(H_(2)O)_(6)]^(2+), [Ni(PPh_(3))_(2)Cl_(2)]`

`[Ni(CO)_(4)], [Ni(PPh_(3))_(2)Cl_(2)], [NiCl_(4)]^(2-)`

`[Ni(CN)_(4)]^(2-), [Ni(H_(2)O)_(6)](2+), [NiCl_(4)]^(2-)`

`[Ni(PPh_(3))_(2)Cl_(2)], [Ni(CO)_(4)], [Ni(CN)_(4)]^(2-)`

Amongst Ni(CO)_(4), [Ni(CN)_(4)]^(2-), NiCl_(4)^(2-) :

`Ni(CO)_(4)` and `NiCl_(4)^(2-)` are diamagnetic and `[Ni(CN)_(4)]^(2-)` is paramagnetic.

`NiCl_(4)^(2-)` and `[Ni(CN)_(4)]^(2-)` are diamagnetic and `Ni(CO)_(4)` is paramagnetic.

`Ni(CO)_(4)` and `[Ni(CN)_(4)]^(2-)` are diamagnetic and `NiCl_(4)^(2-)` is paramagnetic.

`Ni(CO)_(4)` is diamagnetic and, `NiCl_(4)^(2-)` and `[Ni(CN)_(4)]^(2-)` are paramagnetic.

Amongst Ni(CO)_(4), [Ni(CN)_(4)]^(2-) and [NiCl_(4)]^(2-)

`Ni(CO)_(4) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `[Ni(CN)_(4)]^(2-)` is paramagnetic

`[NiCl_(4)]^(2-) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `Ni(CO)_(4)` is paramagnetic

`Ni(CO)_(4) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `[NiCl_(4)]^(2-)` is paramagnetic

`Ni(CO)_(4)` is diamagnetic and `[NiCl_(4)]^(2-)` and `[Ni(CN)_(4)]^(2-)` are paramagnetic