Coordination Compounds

Short Answer Type

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What is a coordination polyhedron?

The spatial arrangement of the ligand atoms which are directly attached to the central atom/ion defines a coordination polyhedron about the central atom. The most common coordination polyhedra are octahedral, square planar and tetrahedral. For example, [Co(NH3)6]3+ is octahedral, [Ni(CO)4] is
tetrahedral and [PtCl4]2– is square planar.

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    Long Answer Type

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    Long Answer Type

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    Long Answer Type

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    On the basis of the following observations made with aqueous solutions, assign primary and secondary valencies to metals in the following compounds:

    Formula

    Motes of AgCl precipitated with excess AgNO3

    (i) PdCl2.4NH3

    2

    (ii) NiCl2.6H2O

    2

    (iii) PtCl4.2HCl

    0

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    1

    (v) PtCl2.2NH3

    0

    .

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