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प्रश्न
Out of NH3 and CO, which ligand forms a more stable complex with a transition metal and why?
उत्तर
Out of NH3 and CO, CO ligand forms a more stable complex with transition metal because the metal-carbon bond in metal carbonyls possesses both s and p character. By the donation of lone pair of electrons of the carbonyl carbon into a vacant orbital of the metal, the M–C σ bond is formed. Similarly, the M–C π bond is formed by the donation of a pair of electrons from a filled d-orbital of metal into the vacant antibonding π orbital of carbon monoxide. This metal-ligand bonding creates a synergic effect that is responsible for the strengthening of the bond between CO and the metal.
संबंधित प्रश्न
Name the type of isomerism shown by the following pair of compound:
[Pt(NH3)4] [PtCl6] and [Pt(NH3)4Cl2] [PtCl4]
Complete and balance the following reactions:
(1) NaCl + MnO2 + H2SO4 → _____ + _____ + ______ + _____
(2) KMnO4 + SO2 + H2O → _____ + ______ + ______ + ______
Which of the following is/are CORRECT?
(I) Acidic character: HF > HCl > HBr
(II) Thermal stability: HF > HCl > HBr
(III) Bond dissociation enthalpy: HF < HCl < HBr
Arrange the following anions according to the increasing order of their stability.
(I) \[\ce{\underset{Alkoxide anion}{R - O^-}}\]
(II)
Phenoxide anion
(III) \[\begin{array}{cc}
\ce{O}\phantom{..}\\
||\phantom{..}\\
\ce{\underset{Carboxylate anion}{R - C - O^-}}\\
\end{array}\]
A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?
Which of the following species is not expected to be a ligand?
Assertion: Toxic metal ions are removed by the chelating ligands.
Reason: Chelate complexes tend to be more stable.
Which molecule/ion among the following cannot act as a ligand in complex compounds?
Which of the following represents the correct order of stability of the given carbocations?
What is meant by the chelate effect? Give an example.
