Reversible solid-state interconversion of rhodizonic acid H<sub>2</sub>C<sub>6</sub>O<sub>6</sub>into H<sub>6</sub>C<sub>6</sub>O<sub>8</sub>and the solid-state structure of the rhodizonate dianion C<sub>6</sub>O<sub>6</sub><sup>2−</sup>(aromatic or non-aromatic?)
作者:Dario Braga、Gianna Cojazzi、Lucia Maini、Fabrizia Grepioni
DOI:10.1039/b107317f
日期:——
Anhydrous rhodizonic acid H2C6O6 is obtained by (fully reversible) thermal dehydration of solid 2,3,5,5,6,6-hexahydroxycyclohex-2-ene-1,4-dione, H6C6O8, commonly known as rhodizonic acid dihydrate. Treatment of H6C6O8 with RbOH yields crystals of Rb2C6O6; the oxocarbon dianion C6O62− is shown to possess a flat, benzene-type structure, with C–C bonds shorter than expected for a (non-aromatic) ketonic-type
无水Rhodizonic酸H 2 C 6 O 6通过固体的(完全可逆)热脱水获得2,3,5,5,6,6-六羟基环己-2-烯-1,4-二酮,H 6 C 6 O 8,通常称为二水杜鹃花酸。用RbOH处理H 6 C 6 O 8产生Rb 2 C 6 O 6晶体; 这碳氧化合物二价阴离子C 6 O 6 2− 显示为具有平面,苯型结构,CC键比(非芳香族)酮型结构的预期短。