Question
Among the ligands NH _3, en, CN ^ - and CO the correct order of their increasing field strength, is :
BITSAT
Chemistry
Coordination Compounds
2023
BITSAT 2023 (Memory Based Paper 1)
BITSAT Chemistry Question (2023) — Solution
Options
- A. NH _3 < en < CN ^ - < CO
- B. CN ^ - < NH _3 < NH _3 < en
- C. en < CN ^ - < NH _3 < CO
- D. CO < NH _3 < en < CN ^ -
Answer
A. NH _3 < en < CN ^ - < CO
Step-by-step solution
Ligands can be arranged in a series in the orders of increasing field strength as given below: Weak field ligands: I ^ - Strong field ligands O ^ -- 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.
Related: Chemistry — Coordination Compounds · All PYQ Banks