Preparation of 1,4:5,8‐Dimethano‐1,2,3,4,5,6,7,8‐Octahydro‐9,10‐Dimethoxyanthracenium Hexachloroantimonate (4 + SbCl 6 − ): A Highly Robust Radical‐Cation Salt

Abstract 1,4:5,8‐Dimethano‐1,4,4a,5,8,8a,9a,10a‐octahydroanthracene‐9,10‐dione 1,4:5,8‐Dimethanododecahydroanthracene‐9,10‐dione 1,4:5,8‐Dimethano‐1,2,3,4,5,6,7,8‐octahydranthracene‐9,10‐diol 1,4:5,8‐Dimethano‐1,2,3,4,5,6,7,8‐octahydro‐9,10‐dimethoxy‐anthracene p ‐Benzoquinone Cyclopentadiene Antimony pentachloride