Which of the following complexes has the largest value of the crystal field splitting ( D )?

Question

Quizplus · Accepted Answer

The crystal field splitting energy ($\Delta$) is influenced by the metal's position in the periodic table, with heavier metals typically having larger splitting energies. Among the given options, complexes B, C, and D involve 4d and 5d transition metals (Ru, Os). Os (Osmium) is heavier than Ru (Ruthenium), and thus complexes involving Os will generally have larger crystal field splitting energies. Between the two Os complexes, C and D, both have the same metal and charge state, but the question specifically asks for the largest value of $\Delta$, not differentiating based on charge state in the provided options. Therefore, the correct answer is C, as it involves a 5d metal, which typically exhibits the largest crystal field splitting energies among the given options.

Which of the Following Complexes Has the Largest Value of the Crystal