114 public questions tagged with this topic.
In [Fe(NH₃)5Cl]Cl₂, the 2 Cl− ions outside the coordination sphere are ionizable and form AgCl, while the inner Cl is a ligand. Thus, 2 moles precipitate.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Primary valence is the oxidation state. In [CoCl₂(NH₃)4]Cl, the complex [CoCl₂(NH₃)4]+ has a +1 charge (balanced by 1 Cl−). NH₃ is neutral, Cl− is −1. Thus, Co’s oxidation state = +3 (since +3 + 2(−1) = +1).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
[Fe(CO)5] (Fe₀, d8) has 5 CO ligands. EAN = 26 + 2 × 5 = 36, but in organometallic context, 8 valence + 10 from ligands = 18 electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Ionization isomerism involves exchange of ligands and counter ions. [Co(NH₃)5SO₄]Br and [Co(NH₃)5Br]SO₄ differ in which ion is inside/outside the coordination sphere.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Cr(NH₃)2(en)2]3+, NH₃ is unidentate (2 ligands), and each ethane-1,2-diamine (en) is bidentate (2 donor atoms). Total = 2 + (2 × 2) = 6.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Secondary valence is the coordination number. [Fe(H₂O)6]3+ has 6 ligands.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
[Co(NH₃)4Cl₂]+ (octahedral, 6 ligands) shows cis and trans isomers.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Secondary valence is the coordination number. [Cu(NH₃)4]SO₄ has 4 NH₃ ligands, giving a coordination number of 4.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Coordination isomerism involves ligand exchange between coordination sphere and counter ions.
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
Ligands are named alphabetically: ammine (NH₃), aqua (H₂O), chlorido (Cl). There are 4 NH₃, 1 H₂O, and 1 Cl in the complex. Co’s oxidation state is +3 (since [Co(NH₃)4(H₂O)Cl]2+ balances 2 Cl−). Name: tetraammineaquachloridocobalt(III) chloride.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
[MnCl₄]2− (Mn₂+, d5) in a tetrahedral field with weak field Cl− is high spin (e2 t23), with 5 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
