Question

Neutral complex in the following is:

Options

• [Co(NO₂)₃(NH₃)₃]

• [Co(NH₃)₅CO₃]Cl

• Na₃[Co(NO₂)₆]

• [Co(C₂O₄)₃]³⁻

Answer 1

[Co(NO₂)₃(NH₃)₃]

Explanation:

Neutral complexes are coordination compounds that have no overall charge. In the given options:

• [Co(NO₂)₃(NH₃)₃] is a neutral complex as it is a complex with no external counterions and the overall charge of the complex ion is zero.
• [Co(NH₃)₅CO₃]Cl is an anionic complex, as the complex ion has a negative charge, and it is balanced by the Cl⁻ counterion.
• Na₃[Co(NO₂)₆] is an anionic complex, as the complex ion has a negative charge, and it is balanced by the Na⁺ counterions.
• [Co(C₂O₄)₃]³⁻ is an anionic complex, as the complex ion has a negative charge.