[4.4.4]Propellahexaene by triple Shapiro degradation. Structural and electronic properties of this maximally unsaturated hydrocarbon and consequences of O-methylation of its [4.4.4]propellatrienetrione precursors
[4.4.4]Propellahexaene by triple Shapiro degradation. Structural and electronic properties of this maximally unsaturated hydrocarbon and consequences of O-methylation of its [4.4.4]propellatrienetrione precursors