Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202620 April 2026Morning ShiftChemistryCoordination CompoundsActual

What is the coordination number of central metal ion in [ Co(en) ₃]³⁺ complex ?

Options

  1. A2
  2. B4
  3. C6
  4. D8

Correct answer

C. 6

Step-by-step solution

The given complex is [ Co(en) ₃]³⁺ . The ligand 'en' stands for ethylenediamine, which is a bidentate ligand. This means each 'en' molecule coordinates to the central metal ion through two donor nitrogen atoms. Since there are three 'en' ligands attached to the central cobalt ion, the total number of coordinate bonds formed is 3 2 = 6 . Therefore, the coordination number of the central metal ion is 6 . Answer: 6

Practice Coordination Compounds on Quantrex Academy →

More from Coordination Compounds

Identify the complex which exhibits all 3 characteristics; paramagnetic; high spin configuration; octahedral geometry 2026Which one of the following complex-isomerism pair matches correctly? 2026Match the Coordination compounds in Column I with the type of stereoisomerism given in Column II exhibited by them. Column I Column II A. [ Pt ( NH ₃)₂ Cl ₂] P. fac-mer B. Ni [( NH 2026The Crystal Field Stabilisation energy of (i) [ CoF ₆]³⁻ and (ii) [ Fe ( H ₂ O )₆]³⁺ are ----- and ------- respectively. 2026Which one of the following octahedral complexes has the highest spin-only magnetic moment? 2026Metal-ligand -bond formation in Mn ₂( CO )₁₀ and [ MnO ₄]^- requires electron-pair donation between metal and ligand orbitals. Which one of the following represents the direction o 2026Which of the following is the most stable complex ion? 2026How many ions per molecule are produced from the complex [ Co(NH ₃ ) ₆] Cl ₂ in solution? 2026 Full Coordination Compounds list All MHT CET PYQs