Explain Crystal field splitting theory - Vidyadip

Question

Explain Crystal field splitting theory

✓

Answer

$\rightarrow$ The Crystal Field Theory $\text{(CFT)}$ is an electrostatic model which considers the metal$-$ ligand bond to be ionic arising purely from electrostatic interactions between the metal ion and the ligand.
$\rightarrow$ Ligands are treated as point charges in case of anions or point dipoles in case of neutral molecules.
$\rightarrow$ The five d orbitals in an isolated gaseous metal atom/ion have same energy, i.e., they are degenerate.
$\rightarrow$ This degeneracy is maintained if a spherically symmetrical field of negative charges surrounds the metal atom/ion.
$\rightarrow$ However, when this negative field is due to ligands $($either anions or the negative ends of dipolar molecules like $NH_3$ and $H_2O)$ in a complex, it becomes asymmetrical and the degeneracy of the d orbitals is lifted.
$\rightarrow$ It results in splitting of the d orbitals.
$\rightarrow$ The pattern of splitting depends upon the nature of the crystal field.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Coordination Compounds→Coordination Compounds — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The mixture of ethyl alcohol and cyclohexane shows positive deviation from Raoult's law. Why?

Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?

What is meant by positive deviations from Raoult's law? Give an example. What is the sign of $\triangle _{\text{mix}}\text{H}$ for positive deviation?

Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.

For the reaction:
$2A + B \rightarrow A_2B$
The rate $= k[A][B]^2$ with $k = 2.0 \times 10^{–6}\ mol^{–2}\ L^2 s^{–1}.$ Calculate the initial rate of the reaction when $[A] = 0.1 \ mol\ L^{–1}, [B] = 0.2\ mol\ L^{–1}$. Calculate the rate of reaction after $[A]$ is reduced to $0.06\ mol\ L^{–1}.$

Write the formula of the following complexes:
$i.$ Hexaammine platinum $(IV)$ chloride.
$ii.$ Dichloro tetrammine cobalt $(III)$ ion.

Calculate the half-life of a first order reaction from their rate constants given below :
(i) $200$ $s^{-1}$
(ii) $2$ $min^{-1}$
(iii) 4 year $^{-1}$

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.

Arrange the compound of set in order of reactivity toward S_N2 displacement :
2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane.

A compound ‘A’ is optically active. On mild oxidation, it gives a compound ‘B’ but on vigorous oxidation gives another compound ‘C’. C along with D is also formed from B by reaction with iodine and alkali. Deduce the structures of A, B, C, D.