[Fe(CN)6]3- involves d2sp3 hybridization
Friday, April 22, 2022
[Fe(CN)6]4- is diamagentic while [FeF6]4- is strongly paramagnetic.Why ?
CN- is strong field ligand and so it pairs up the electrons leading to the formation of low spin complex which is diamagnetic. [Fe(CN)6]4-
Which of the Complex of the following pairs has the largest value of CFSE?
(1) [Co(CN)6]3- and [Co(NH3)6]3+
(2) [Co(NH3)6]3+ and [CoF6]3-
(3) [Co(H2O)6]3+ and [Rh(H2O)6]3+
(4) [Co(H2O)6]2+ and [Co(H2O)6]3+
SOLUTION:
(1) CN is the stronger ligand than NH3 therefore CFSE of [Co(CN)6]3- will be more than [Co(NH3)6]3+
(2) NH3 is stronger ligand than F therefore CFSE of [Co(NH3)6]3+ will be more than [CoF6]3- .
(3) Co belong to 3d series whereas The Rh belong to 4d series. More the value of n more is CFSE therefore CFSE of [Rh(H2O)6]3+ is more than [Co(H2O)6]3+ .
(4) Oxidation number of Co in [Co(H2O)6]3+ is more than the Oxidation number of [Co(H2O)6]2+ therefore, CFSE of [Co(H2O)6]3+ is more than [Co(H2O)6]2+ .
Saturday, April 16, 2022
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:
(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?
Which is correct statement for regarding I2Cl6 molecule?
(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?
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