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[NiCl(4)]^(2-) is paramagnetic while [Ni...

`[NiCl_(4)]^(2-)` is paramagnetic while `[Ni(CO)_(4)]` is diamagnetic though both are tetrahedral Why?

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In `Ni(CO)_(4)`, Ni is in zero oxidation state whereas in `NiCl_(4) ^(2–)`, it is in `+2` oxidation state. In the presence of CO ligand, the unpaired d electrons of Ni pair up but `Cl^(–)` being a weak ligand is unable to pair up the unpaired electrons.
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NCERT-COORDINATION COMPOUNDS-Exercise
  1. Give evidence that [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl are ionisation ...

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  2. Deduce the structures of [NiCl(4)]^(2-) and [Ni (CN)(4)]^(2-) consider...

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  3. [NiCl(4)]^(2-) is paramagnetic while [Ni(CO)(4)] is diamagnetic though...

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  4. [Fe(H2O)6]^(3+) is strongly paramagnetic whereas [Fe(CN)6]^(3-) is wea...

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  5. Explain [Co(NH3)6]^(3+) is an inner orbital complex whereas [Ni(NH3)6]...

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  6. Predict the number of unpaired electrons in the square planar [Pt(CN)4...

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  7. The hexaquo manganese(II) ion contains five unpaired electrons, while ...

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  8. WERNER’S THEORY OF COORDINATION COMPOUNDS

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  9. FeSO4 solution mixed with (NH4)2SO4 solution is 1:1 molar ratio gives ...

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  10. Explain with two examples each of the following: coordination entity, ...

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  11. What is meant by unidentate and ambidentate ligands? Give two examples...

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  12. Specify the oxidation numbers of the metals in the following coordinat...

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  13. Using IUPAC norms write the fomulas for the following (i). Tetrahydr...

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  14. Using IUPAC norms write the systematic names of the following: (i). ...

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  15. List various types of isomerism possible for coordination compounds, g...

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  16. How many geometrical isomers are possible in the following corrdinatio...

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  17. Draw the structures of optical isomers of: (i). [Cr(C2O4)3]^(3-) (...

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  18. Draw all the isomers (geometrical and optical) of: (i) [CoCl(2)(en)(...

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  19. Write all the geometrical isomers of [Pt(NH3)(Br)(Cl)(py)] and how man...

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  20. Aqueous copper sulphate solution (blue in colour) gives: (i). A gree...

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