Conformational analysis of the [(C5H4CR′R″)2m]2+ dications (M = Ru, Os) as a tool for determining their onium or dicarbocation structure

Article abstract of DOI:10.1007/BF02505686

The [(Me₂CC₅H₄)₂M]²⁺ and [(Me(H)CC₅H₄)₂M]²⁺ dications (M = Ru, Os) were generated and their precursors, dicarbinols, were synthesized. ¹H NMR spectral analysis showed that the former dications have a dicarbocation structure. For the [(Me(H)CC₅H₄)₂M]²⁺ dications, the energies of both the onium and dicarbocation structures are close, and compounds of both types can be simultaneously observed in solution.