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How do the transition elements form pi- ...

How do the transition elements form `pi-` complexes ?

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Due to the presence of vacant d - orbitals in the transition elements, the ligands with localised or delocalised `pi-` electrons `(viz, CH_(2)=CH_(2), C_(2)H_(5)^(-), C_(6)H_(6), etc.)` form bonds with the metals by transferring their `pi`- elecrons to these vacant orbitals. Hence, transition elements form `pi-` complexes.
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CHHAYA PUBLICATION-COORDINATION COMPOUNDS OR COMPLEX COMPOUNDS-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION (SHORT ANSWER TYPE )
  1. Calculate the oxidation number of the central metal atoms or ions : ...

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  2. Calculate the oxidation number of the central metal atoms or ions : ...

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  3. Calculate the oxidation number of the central metal atoms or ions : ...

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  4. Calculate the oxidation number of the central metal atoms or ions : ...

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  5. Calculate the oxidation number of the central metal atoms or ions : ...

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  6. Write the type of hybridisation in [Cr(CO)(6)]. Also explain its struc...

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  7. Give the geometrical isomers of [Pt(NH(3))(2)Cl(2)].

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  8. Write the formula of potassiumtrioxalatoferrate (III).

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  9. Calculate the Effective Atomic number of Mn is Mn(2)(CO)(10).

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  10. If a coordination compound, CoCl(3).4NH(3) is heated, it does not give...

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  11. [M("AA")(2)X(2)]^(n+) is an optically active complex ion. What is its ...

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  12. How do the transition elements form pi- complexes ?

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  13. Why can't there be any low spin tetrahedral complex?

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  14. Calculate the volume of 0.1M AgNO(3) solution required for complete pr...

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  15. Why do the following transition metal ions appear colourless ? Cu^(+),...

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  16. Explain which of the following compounds has effective atomic number o...

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  17. Why does the paramagnetic nature of the 3d transition series increase ...

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  18. Calculate the 'spin-only' magnetic moment of the tetrahedral complex, ...

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  19. Show the structures of the isomers of [Co(NH(3))(3)Cl(3)].

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  20. The stability (or formation) constant (K(f)) for [Ag(NH(3))(2)]^(+) is...

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