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NEET2016ChemistryCoordination CompoundsActual

The correct increasing order of trans-effect of the following species is

Options

  1. ANH 3 > CN - > Br - > C 6 H 5 -
  2. BCN - > C 6 H 5 - > Br - > NH 3
  3. CBr - > CN - > NH 3 > C 6 H 5 -
  4. DCN - > Br - > C 6 H 5 - > NH 3

Correct answer

B. CN - > C 6 H 5 - > Br - > NH 3

Step-by-step solution

The trans effect is the increased lability of ligands that are trans to certain other ligands, which can thus be regarded as trans-directing ligands. It is attributed to electronic effects and it is most notable in square planar complexes, although it can also be observed for octahedral complexes. CN - > C 6 H 5 - > Br - > NH 3

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