An example of a sigma bonded organometallic compound is:
Grignard's reagent
Ferrocene
Cobaltocene
Ruthenocene
Correct answer: Grignard's reagent
Solution
Grignard's reagent (RMgX) contains a sigma bond between the carbon atom and the metal (magnesium), making it a sigma-bonded organometallic compound. The other options involve pi-bonding interactions.