Chemical Structure from Scientific Research

Structure of [4a]4− (shown with the coordinated [Na(THF)3]+ subunits). Hydrogen atoms, minor disordered positions and solvent molecules have been omitted for clarity. The effect of the oxidation state of TFF on the strength of the double bond is illustrated by changes of alkene bond length and θ eq torsions (grey labels, averaged values are given for θ eq ).

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