作者:Truc-Vi Duong、Edward J. Valente
DOI:10.1007/s10870-016-0658-7
日期:2016.7
has been determined on a single prismatic specimen at 280, 250, 200, 150 and 101 K (±1 K). The ostensibly rigid molecule possesses mirror symmetry, which is not retained in the solid state. Each six-membered ring has a boat conformation, with torsions-0.2°, 1.3°, −2.7° (101 K). Carbonyl groups are eclipsed with a common methine C–H bond, and the OCC(H) bond angles are enlarged to 126.9°, 127.0°, while
摘要 1,7,7-Trimethyl-2,6-dioxabicyclo[2.2.2]octan-3,5-dione 是由 2-carboxy-3,3-dimethyl-5- 的双分子内脱水/环化形成的双假酰基缩酮。氧己酸。该化合物是一种挥发性的无色结晶固体 (mp 137 °C),通过缓慢的溶剂蒸发从乙醇中形成棱柱和板。晶体为正交晶系,空间群 P212121 (#19),a = 8.0557(2) Å,b = 10.3545(3) Å,c = 10.7583(3) Å,V = 897.37(11)Å3 (101 K)。晶体和分子结构已在 280、250、200、150 和 101 K (±1 K) 的单个棱柱样品上确定。表面上刚性的分子具有镜像对称性,在固态中不保留。每个六元环都具有船形构象,扭转为 0.2°、1.3°、-2.7° (101 K)。羰基被一个常见的次甲基 C-H 键所掩盖,并且OCC(H)键角扩大到126