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Nomenclature of Coordination Compounds

Write:a IUPAC...

Question

Write:
(a) IUPAC name
(b) Central metal ion
(c) Ligand
(d) Coordination number
(e) Geometry of the complex $[C r {(e n)}_{3}] C l_{3}$

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Solution

(a) IUPAC name $-$ Tris ( ethylene dia mine ) chromium(III)chloride
(b) Central metal ion $-$ Chromium
(c) Ligand $-$ ethylenediamine (en)
(d) Co-ordination number $-$ 6 ( 3 bidentate ligands present )
(e) Geometry of the complex $-$ Octahedral

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Q. For given complex

[N i (P P h_{3})_{2} C l_{2}]

mention
(i) IUPAC Name
(ii) Central metal ion
(iii) Ligands
(iv) Coordination number
(v) Nature of the complex

Q. Mark the correct statements regarding the geometry of complex ions.
(i) The geometry of the complex ion depends upon the coordination number.
(ii) If the coordination number is 6, the complex is octahedral.
(iii) If the coordination number is 4, the geometry of the complex may be tetrahedral or square planar.

Q. What is the primary valency of

[C r (e n)_{3}] C l_{3}

Q. Ammonia gas does not evolve from the complex

F e {C l}_{3} \cdot 4 N H_{3}

but it gives white precipitate with aqueous solution of

A g N O_{3}

. Coordination number of central metal ion in above complex is six. Give IUPAC name of the complex:

The coordination number of a central metal atom

in a complex is determined by :

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