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1,what are strong and weak field ligands? 2.how to determine the hybridisation of coordination compound. 3.crystal field theory in details?

1,what are strong and weak field ligands?
2.how to determine the hybridisation of coordination compound.
3.crystal field theory in details?

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
10 years ago

Dear rohini,

The weak field and strong field ligands are based on their capability of splitting. And are represented in Spectrochemical Series which is a derived list of ligands ordered by the size of the splitting Δ that they produce. It can be seen that the low-field ligands are all π-donors (such as I-), the high field ligands are π-acceptors, such as CN- and CO), and ligands such as H2O and NH3, which are neither strong or weak , are in the middle.

I < Br < S2− < SCN < Cl < NO3 < N3 < F < OH < C2O42− < H2O < NCS < CH3CN < py (pyridine) < NH3 < en (ethylenediamine) < bipy (2,2'-bipyridine) < phen (1,10-phenanthroline) < NO2 < PPh3 < CN < CO

(Order of Increasing splitting weak field to strong field).

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