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What transition metal when coordinated with water to form an octahedral complex has the least intense peak
Accepted Answer
The intensity of a transition metal complex's peak is related to the d-d transitions. Complexes with a larger crystal field splitting energy (Δ) have higher energy transitions and therefore more intense peaks. The magnitude of Δ depends on the identity of the metal, the ligands, and the geometry of the complex. While it's impossible to definitively say without more context, a transition metal with a weak field ligand like water would generally have a smaller Δ and therefore a less intense peak. For instance, a complex like [Mn(H2O)6]2+ would likely exhibit a less intense peak compared to a complex with strong field ligands like [Co(NH3)6]3+.
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