6 public questions tagged with this topic.
The coordination number is the number of ligand donor atoms directly bonded to the central metal ion. In [Co(NH₃)6]Cl₃, there are 6 NH₃ ligands, each unidentate, so the coordination number is 6.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Fe(CN)5NO]2−, NO is NO+ (+1), 5 CN− = −5. Overall charge is −2. Thus, x + (−5) + 1 = −2, x = +2, but the sphere’s charge is −2.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
3 Cl− are ligands inside, 1 Cl− is counter ion outside.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Fe(NH₃)4Cl₂]NO₃, [Fe(NH₃)4Cl₂]+ balances NO₃−. Fe is +3, 2 Cl− = −2, 4 NH₃ = 0. Charge = +3 − 2 = +1.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
In [Ni(NH₃)5Cl]Cl, charge of coordination sphere = +1.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
[Ni(NH₃)2Cl₂] is neutral, with no counter ions, so its coordination sphere remains intact in solution.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
