1. Tardigrade
  2. Question
  3. Chemistry
  4. Among the ligands NH3, en, CN- and CO the correct order of their increasing field strength, is :

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Q. Among the ligands $NH_3, \,en,\, CN^-$ and CO the correct order of their increasing field strength, is :

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Solution:

Ligands can be arranged in a series in the orders of increasing field strength as given below :
$I^{-} < Br^{-} < S^{2-} < Cl^{-} < NO_{3}^{-} < F^{-} < OH^{-} < EtOH < C_{2}O_{4}^{2-} < H_{2}O$ $< NCS^{-} < EDTA < NH_{3} < en < NO_{2}^{-} < CN^{-} < CO$
Such a series is termed as spectrochemical series. It is an experimentally determined series based on the absorption of light by complexes with different ligands.