1123–1125], which is referred to as polymorph I. The asymmetric unit of polymorph II contains two half molecules located on crystallographic centres, while the asymmetric unit of polymorph I includes one half molecule, also located on a crystallographic centre. Time‐dependent density functional theory (TD‐DFT) at the RB3LYP level using the 6‐31G(d,p) basis set was applied. The predicted electronic absorption
9-
蒽醛的二聚体,即七环[8.6.6.6 2,9 .0 3,8 .0 11,16 .0 17,22 .0 23,28 ] octacosa-3,5,7,11,13,15在M(ClO 4)存在下,通过
乙醇溶液的回流合成了,17(22),18,20,23(28),24,26-十二碳烯-1,9-
甲醛,C 30 H 20 O 2)2和1,3-二
氨基丙-2-醇(M = Co 2+或Cu 2+)。它的结构已经通过单晶X射线衍射确定,表明它是单斜空间群P中的一个新的多晶型物,称为多晶型物II。2 1 / n。将其与先前报道的三斜晶修饰相比较[Ehrenberg(1968)。Acta Cryst。B 24,1123-1125],称为多晶型物I。多晶型物II的不对称单元包含两个位于结晶学中心的半分子,而多晶型物I的不对称单元包含同样位于结晶学中心的半个分子。应用了基于时间的密度泛函理论(TD-DFT),其使