The correct statement(s) regarding the binary transition metal carbonyl compounds is…

Chemistry · JEE Advanced · NTA Exams — Coordination Compounds

1. Total number of valence shell electrons at metal centre in Fe(CO)₅ or Ni(CO)₄ is 16
2. These are predominantly low spin in nature.
3. Metal-carbon bond strengthens when the oxidation
   state of the metal is lowered
4. The carbonyl C-O bond weakens when the oxidation state of the metal is increased

Answer

(B) These are predominantly low spin in nature., (C) Metal-carbon bond strengthens when the oxidation state of the metal is lowered

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