Niobocene, , and titanocene, , are organometallic compounds with similar structures. However, their properties differ due to the electronic configuration of the central metal atom.
Which of the following statements best explains why niobocene is generally less reactive compared to titanocene?
1
Niobocene has a higher oxidation state, making it more stable and less reactive.
2
Titanocene has unpaired d-electrons, which increases its reactivity due to electron availability.
3
Niobocene contains a ligand with stronger donor ability, reducing its reactivity.
4
The atomic radius of niobium is smaller than titanium, resulting in lower reactivity.