Compare the splitting energy (CFSE) into the following compound and give appropritate reason ? [Co(NH3) 6] 3+ , [Rh(NH3) 6] 3+,[Ir(NH3) 6] 3+

In given compounds number of ligands, types of ligands and oxidation state is same for central atom belive to same group but different transition series 3d, 4d and 5d respectively. We know that as move top to bottom size of d-orbital(3d--> 4d -->5d) is increases so ligand approches to d-orbitals more closely so the repulsion between d-orbital of metal and ligand is high and splitting energy increases. 

Thus order of splitting energy 

[Co(NH3)6]3+ < [Rh(NH3)6]3+ < [Ir(NH3)6]3+

Related questions:

(1) Which complex is more stable [Ni(CN)4]4- or [Ni(CN)4]2- and why?

(2) d3s Hybrization and it's examples.

(3) What is the common formula of “Prussian blue is” and “Turn bull's blue”?  

(4) What is denticity of NO and NO+ ligands ?

(5) Why all the tetrahedral Complexes are high spin Complexes?

(6)Why Fe(CO)₅ is colourless while Fe(bipy)(CO)₃ is intensely purple in colour ?

(7) Why [Mn(H₂O)₆]⁺² is colourless although in which Mn⁺² ion had five unpaired electrons ?

(8) Why [FeF₆]^3– is colourless whereas [CoF₆]^3– is coloured? 

(9) Why [Ni(CN)₄]^-2 is colourless while [Ni(H₂O)₄]^-2 is colour although both have +2 oxidation state and 3d⁸ configuration ?

Which is correct statement for regarding I2Cl6 molecule?

(A) The molecule is planar

(B) 8 Number of angles of type 02 are present

(C) 03 > 01 > 02

(D) Total 4 unshared lone pairs are present

Ans key (A)

What is structure and also explain the bridge bonding of I2Cl6 ?

Related Questions:

(1) What is the difference between the structure of AlCl3 and diborane?

(2) What is structural feature of monomeric and polymeric Beryllium halides ?

(3) What is bridge bond ? explaine 3C-4e bridge bond with suitable examples .

(4) What is structure of Beryllium chloride ?

(5) What is the structure of Aluminium tetrahydridoborate (Al(BH4)3) ?

(6) What is structure of Al(CH3)3 and also explain the bridge bonding in Al(CH3)3?

(7) The type of overlap in the bridge bond exist in Al2(CH3)6 is

(8) What is structure of diborane?

(9) What is structure of BeH2 in solid state ?

(10) Consider the structure of Al(CH3)3 given below and select the correct option?

(11) Consider Al2(OH)6 compound and calculate the value of (X+Y)/Z Where X= total number of two centre-two electrons (2C-2e) bond, Y= total number of three centre-two electron(3C-2e)bonds, and Z=total number of three centre-four electron (3C-4e) bond;

Ellingham Diagram and it's features:

The changes in Gibbs energy that occur when one moleofoxygen isused may be plotted against temperature for a number of reaction of metals to form

their oxides. Such a graph is shown in Figure below and is called an Ellingham diagram for oxides. Similarly, we can plot Ellingham diagrams for halides.

The Ellingham diagram for oxides show the following important features :

(1) Ellingham diagram normallyconsist of plots of dfG° vs T for the formation of oxides of elements, i.e. for the reaction.

(2) The graphs for metal oxide all slope upwards because the change in Gibbs energybecomes less negative with increase in temperature.

(3) Each plot follows a straight line unless there is some change in phase.

(4) When the temperature is increased, a point will be reached when the line crosses dG = 0 line. Below this temperature the dfG° of oxide is negative and hence the oxide is stable.Above this temperature dfG° of the oxide is positive and hence the oxide becomes unstable and decomposes on its own into metal and oxygen.

Chemical refining methods:

(1) Oxidative refining:

(i) Bessemerisation : Purification of iron from cast Iron or pig iron :

(ii) Cupellation : lead (Pb) present in Silver removed by Cupellation process:

(2) Parting Process:

(3) Polling process: This process is used for the purification of copper and tin.

(4) Electrolytic Refining:

(5) Kroll's Process and Imperial metal industries (IMI) Process of reduction;

(6) Vapour phase refining:

(A) Vapour phase refining : Mond's process:

(B) Vapour phase refining : Van Arkel–De Boer process :

(7) Parke's Process: Desilverisation of lead ;

(8) Pudding process: Used for the manufacture of wrought iron from cast iron: