Mastermind following complex particles in expanding request of precious stone field parting energy (DO) : [Cr(Cl)6]3–, [Cr(CN)6]3–, [Cr(NH3)6]3+.

Solution:

The expanding request of gem field energy is

[Cr(Cl)6]3–<[Cr(NH3)6]3+ <[Cr(CN)6]3–

This is additionally the request for field strength of the ligands as indicated by the spectrochemical series.