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In certain cases, achiral ligands can be...

In certain cases, achiral ligands can become chiral on coordination to a metal, leading to a complex that is chiral. Usually the non-chiral ligand contains a donor that rapidly inverts as a free ligand, but that becomes locked in one configuration on co-ordination. An example is `MeNHCH_(2)CH_(2)NHMe`, where two N atoms become chiral centres on co-ordination to a metal atom. Consider two bidentate ligands for square planar complexes only :
`A A to Me-NH-CH_(2)-CH_(2)-NHMe`
`CD to Me-NH-CH_(2)-CH_(2)-NH_(2)`
Total number of chiral and achiral complexes obtained from `M(A A)_(2)` Will be respectively :

A

2, 1

B

4, 2

C

4, 3

D

2, 2

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • In certain cases, achiral ligands can become chiral on coordination to a metal, leading to a complex that is chiral. Usually the non-chiral ligand contains a donor that rapidly inverts as a free ligand, but that becomes locked in one configuration on co-ordination. An example is MeNHCH_(2)CH_(2)NHMe , where two N atoms become chiral centres on co-ordination to a metal atom. Consider two bidentate ligands for square planar complexes only : A A to Me-NH-CH_(2)-CH_(2)-NHMe CD to Me-NH-CH_(2)-CH_(2)-NH_(2) In the complex solution [M(CD)_(2)] , identify the complex isomer which does not have any mirror planes but is nor chiral.

    A
    B
    C
    D

  • In certain cases, achiral ligands can become chiral on coordination to a metal, leading to a complex that is chiral. Usually the non-chiral ligand contains a donor that rapidly inverts as a free ligand, but that becomes locked in one configuration on co-ordination. An example is MeNHCH_(2)CH_(2)NHMe , where two N atoms become chiral centres on co-ordination to a metal atom. Consider two bidentate ligands for square planar complexes only : A A to Me-NH-CH_(2)-CH_(2)-NHMe CD to Me-NH-CH_(2)-CH_(2)-NH_(2) In the complex solution [M(CD)_(2)] , identify the complex isomer which does not have any mirror planes but is nor chiral.

    A
    B
    C
    D

  • Which one is bidentate ligand?

    A
    (a) `C_2O_4^(-)`
    B
    (b) `NH_2*CH_2*CH_2*NH_2`
    C
    (c) None of these
    D
    (d) Both (a) and (b)

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