Question

The IUPAC name of $[Ni(CO)_4]$ is

• A. tetracarbonyl nickel(I)
• B. tetracarbonyl nickel(O)
• C. tetracarbonyl nickel(II)
• D. tetracarbonyl nickel(III)

Answer 1

Answer: (B)

tetracarbonyl nickel(O)

Answer 2

When we write the IUPAC name for a coordination complex, if the coordination entity is neutral, then the name of Ligands come first followed by the name of the metal and the oxidation state in $0$ . Thus, the IUPAC name for $\left[ Ni ( CO )_{4}\right]$ is Tetracarbonylnickel (o).