Considering the specific supramolecular synthon design of carboxylic acid and alcoholic hydroxyl groups in the field of crystal engineering, we compared the solid state structures of particular benzoates and corresponding acids 1–4 both in the non-spacered (1, 2) and spacered (3, 4) forms. Based on the single crystal X-ray study, there is only a slight influence of the phenylacetylene spacer with regard to the layer lattice arrangement of the benzoates while referring to the benzoic acid analogues the addition of the spacer gives rise to a modification of the lattice from a layer to a tape structure. Dependent on the crystallization conditions, two crystalline polymorphs of compound 3 (3a, 3b) were obtained and discussed regarding their structural differences.
考虑到晶体工程领域中
羧酸和醇羟基特定超分子单体设计,我们比较了特定
苯甲酸盐及其对应酸1-4在无间隔(1, 2)和有间隔(3, 4)形式中的固态结构。根据单晶X射线研究,
苯甲酸盐的层状晶格排列在加入
苯乙炔间隔基时仅有轻微影响,而参照
苯甲酸类似物,间隔基的加入导致晶格结构从层状转变为带状。根据结晶条件,化合物3获得了两种晶型多晶型物(3a, 3b),并讨论了它们在结构上的差异。