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MHT CET Medical202621 April 2026Evening ShiftChemistryCoordination CompoundsActual

Identify from the following a coordinate complex containing neutral ligand in it.

Options

  1. APentacarbonyliron(0)
  2. BHexacyanoferrate(II)ion
  3. CTrioxalatocobaltate(III)ion
  4. DSodiumhexanitrocobaltate(III)

Correct answer

A. Pentacarbonyliron(0)

Step-by-step solution

Pentacarbonyliron(0) is [Fe(CO)₅] . The ligand is carbonyl ( CO ), which is a neutral molecule. Hexacyanoferrate(II) ion is [Fe(CN)₆]⁴⁻ . The ligand is cyanide ( CN^- ), which is anionic. Trioxalatocobaltate(III) ion is [Co(C₂O₄)₃]³⁻ . The ligand is oxalate ( C₂O₄²⁻ ), which is anionic. Sodium hexanitrocobaltate(III) is Na₃[Co(NO₂)₆] . The ligand is nitro ( NO₂^- ), which is anionic. Thus, pentacarbonyliron(0) contains a neutral ligand. Answer: Pentacarbonyliron(0)

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