Abstract
AbstractThe syntheses of [H3C(O)CC(OH)2][MF6] and [H3C(OH)CC(OH)2][MF6]2 (M=As, Sb) by reacting pyruvic acid in the superacidic systems HF/AsF5 and HF/SbF5 are reported. The salts were characterized by low‐temperature vibrational spectroscopy and in the cases of [H3C(O)CC(OH)2][SbF6] and [H3C(OH)CC(OH)2][SbF6]2 ⋅ HF by X‐ray crystal structure analyses. The experimental results are discussed together with quantum chemical calculations. Remarkably, the bond distance and the twisting angle around the central C−C bond are unaffected by the protonations despite increasing coulombic repulsion. The crystal structure reveals short interionic interactions that have a considerable influence on the C−C bond.
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