Co-ordination Compounds Flashcards for NEET — 24 cards

First 8 of 24 Co-ordination Compounds flashcards

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1. Card 1 of 24

   Does a square planar complex of type $[Mabcd]$ show optical isomerism?

   Hint: Flat molecules are superimposable on their mirror images.

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   Answer

   No. Square planar complexes do not show optical isomerism because they possess a plane of symmetry (the plane of the molecule itself) and a center of symmetry.

2. Card 2 of 24

   According to Werner's Theory, what are the two types of valencies shown by a metal in a coordination compound?

   Hint: Primary = Oxidation State. Secondary = Coordination Number.

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   Answer

   1. Primary Valency: Corresponds to the oxidation state of the metal (ionizable, satisfied by negative ions). 2. Secondary Valency: Corresponds to the coordination number of the metal (non-ionizable, satisfied by neutral molecules or negative ions).

3. Card 3 of 24

   What is an Ambidentate Ligand? Give two examples.

   Hint: Ambi = both (like ambidextrous).

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   Answer

   A unidentate ligand that can ligate (bind) through two different donor atoms. Examples: 1. $NO_2^-$ (can bind through N or O) 2. $SCN^-$ (can bind through S or N)

4. Card 4 of 24

   What is the Denticity and the charge of an EDTA ion?

   Hint: Used in estimating water hardness and treating lead poisoning.

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   Answer

   Denticity: Hexadentate (6 donor atoms: two Nitrogen and four Oxygen). Charge: -4 (Ethylene diamine tetraacetate: $EDTA^{4-}$).

5. Card 5 of 24

   What is the Chelate Effect?

   Hint: Rings bring stability (entropy driven).

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   Answer

   The enhanced thermodynamic stability of coordination compounds containing cyclic ring structures formed by di- or polydentate ligands, compared to similar complexes with monodentate ligands.

6. Card 6 of 24

   Write the IUPAC name for $K_3[Fe(CN)_6]$.

   Hint: Name the cation first. The complex is anionic, so use the suffix '-ate' for the metal.

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   Answer

   Potassium hexacyanoferrate(III)

7. Card 7 of 24

   Write the IUPAC name for $[Co(NH_3)_5Cl]Cl_2$.

   Hint: Alphabetical order for ligands: ammine before chlorido. Metal has normal name because complex is cationic.

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   Answer

   Pentaamminechloridocobalt(III) chloride

8. Card 8 of 24

   Identify the type of structural isomerism: $[Co(NH_3)_5(SO_4)]Br$ and $[Co(NH_3)_5Br]SO_4$

   Hint: They exchange ions between the coordination sphere and the ionization sphere.

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   Answer

   Ionization Isomerism. They give different ions in solution ($Br^-$ vs $SO_4^{2-}$).