Flashcards for NEET Chemistry - Coordination Compounds

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Chemistry

Coordination Compounds

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Coordination Compounds

Primary Valency

Ionisable and equal to the oxidation state of the metal in the coordination compound

It is satisfied by negative ions

Secondary Valency

Directional and non- ionisable and equal to the coordination number

It is satisfied by neutral or negative ligands

Double Salt

Dissociate into simple ions completely when dissolved in water

E.g. Carnallite – KCl.MgCl2.6H2O, Mohr’s salt – FeSO4.(NH4)2SO4.6H2O, Potash alum – KAl(SO4)2.12H2O

Unidentate Ligand

It binds to the metal ion through a single donor atom

E.g. Cl^–, H₂O or NH₃

Bidentate Ligand

It binds to the central atom through two donor atoms

E.g. ethane-1,2-diamine, oxalate

Polydentate Ligand

A single ligand with many donor atoms

E.g. EDTA is a hexadentate ligand

Ambidentate Ligand

The ligand, which has two different donor atoms and can bind to the central atom through either of the two donors

E.g. NO₂^– and SCN^– ions

Coordination Number

It is the number of ligand donor atoms to which the central metal is directly bonded in a complex

E.g. In [PtCl₆]^2–, the coordination number of Pt is 6

In [Fe(C₂O₄)₃]^3–, the coordination number of Fe is 6 because oxalate is a bidentate ligand.

Homoleptic Complexes

It is a complex in which a metal is bound to only one kind of donor groups

E.g. [Co(NH₃)₆]³⁺, [Ni(CO)₄], [PtCl₆]^2–

Heteroleptic Complexes

It is a complex in which a metal is bound to more than one kind of donor groups

E.g. [Co(NH₃)₄Cl₂]⁺

Also check:

• NEET Chemistry Syllabus
• NEET Chemistry Important Topics
• NEET Chemistry MCQs
• How to Score 160 Plus in NEET Chemistry