The geometry of the 4,8,12-trioxa-4,8,12,12c-tetrahydrodibenzo[cd,mn]pyrene system in the cationic state was established by X-ray structural resolution of the salts formed between the cation and various anions. The geometry was found to be planar for the 4,8,12-trioxa-4,8,12,12c-tetrahydrodibenzo[cd,mn]pyrenylium and 2,6,10-tri(tert-butyl)-4,8,12-trioxa-4,8,12,12c-tetrahydrodibenzo[cd,mn]pyrenylium cations with the monovalent anions I−, BF_4^-, PF_6^-, AsF_6^-, HNO3.NO_3^- and CF3SO_3^-, and the divalent anions S2O_6^2-} and Mo6Cl_14}^2-}. The salts were found to crystallize in distinct space groups following a characteristic pattern. Mixed cation–anion stacking resulted in space groups with high symmetry: Pbca in three cases and R3¯c in one; a temperature study of the latter was made at ten different temperatures. The formation of dimers of anions and cations resulted in lower-symmetry space groups, mainly monoclinic (P21/n, P21/c and C2/c), but also P1¯.
通过对阳离子和各种阴离子之间形成的盐进行 X 射线结构解析,确定了阳离子状态下 4,8,12-三氧杂-4,8,12,12c-四氢二苯并[cd,mn]芘体系的几何形状。研究发现,4,8,12-三氧杂-4,8,12,12c-四氢二苯并[cd,mn]芘和 2,6,10-三(叔丁基)-4、8,12-三氧杂-4,8,12,12c-四氢二苯并[cd,mn]芘阳离子与一价阴离子 I-、BF_4^-、PF_6^-、AsF_6^-、HNO3.NO_3^- 和 CF3SO_3^- 以及二价阴离子 S2O_6^2-} 和 Mo6Cl_14}^2-}。研究发现,这些盐类在不同的空间群中结晶时遵循一种特征模式。阳离子-阴离子混合堆叠产生了具有高度对称性的空间群:其中三个是 Pbca,一个是 R3¯c;对后者进行了十种不同温度下的温度研究。阴阳离子二聚体的形成导致较低对称性的空间群,主要是单斜(P21/n、P21/c 和 C2/c),但也有 P1¯。