Química de Coordenação

Prévia do material em texto

23 Transition Metals and Solutions to Exercises Coordination Chemistry 23.79 (a) Formally, the two Ru centers have different oxidation states; one is +2 and the other is +3. (b) Ru²⁺, d⁶ (c) There is extensive bonding-electron delocalization in the isolated pyrazine molecule. When pyrazine acts as a bridging ligand, its delocalized molecular orbitals provide a pathway for delocalization of the "odd" d-electron in the Creutz-Taube ion. The two metal ions appear equivalent because the odd d- electron is delocalized across the pyrazine bridge. 23.80 According to the spectrochemical series, the order of increasing for the ligands is Cl⁻