Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryCoordination Compounds

On the basis of crystal field theory, explain why Co(III) forms a paramagnetic octahedral complex with weak field ligands, whereas it forms a diamagnetic octahedral complex with strong field ligands.

Options

  1. AWeak field ligands cause a higher crystal field splitting, leading to unpaired electrons in Co(III) complexes.
  2. BWeak field ligands result in a lower crystal field splitting, causing Co(III) complexes to be diamagnetic.
  3. CStrong field ligands lead to a higher crystal field splitting, resulting in paired electrons in Co(III) comple
  4. DStrong field ligands cause a lower crystal field splitting, making Co(III) complexes paramagnetic.

Correct answer

A. Weak field ligands cause a higher crystal field splitting, leading to unpaired electrons in Co(III) complexes.

Step-by-step solution

Correct Option is : (A) Weak field ligands cause a higher crystal field splitting, leading to unpaired electrons in Co(III) complexes.

Practice Coordination Compounds on Quantrex Academy →

More from Coordination Compounds

[ Ti(H ₂ O) ₆]²⁺ is a colored compound where as [ Zn(H ₂ O) ₆]²⁺ is colorless, because 2026What is coordination number of central metal ion in cisplatin ? 2026Which of the following complexes exhibits solvate isomerism? 2026What type of ligand the ethylenediamine is? 2026Which of the following isomers is used in the treatment of cancer? 2026Identify the geometry and magnetic behavior of the complex [ Ni ( CO )₄] . 2026Identify the correct match from the following for coordinate complex (column A) and respective geometry (column B) Column A Coordination complex Column B Geometry (A). [ Ni ( CN )₄ 2026Which type of complex is Diamminedichloroplatinum(II)? 2026 Full Coordination Compounds list All NEET PYQs