Synthesis, crystal structure studies and solvatochromic behaviour of two 2-{5-[4-(dimethylamino)phenyl]penta-2,4-dien-1-ylidene}malononitrile derivatives
作者:Georgii Bogdanov、John P. Tillotson、Victor N. Khrustalev、Sergei Rigin、Tatiana V. Timofeeva
DOI:10.1107/s2053229619010398
日期:2019.8.1
The synthesis, crystal structure studies and solvatochromic behavior of 2‐(2E,4E)‐5‐[4‐(dimethylamino)phenyl]penta‐2,4‐dien‐1‐ylidene}malononitrile, C16H15N3 (DCV[3]), and 2‐(2E,4E,6E)‐7‐[4‐(dimethylamino)phenyl]hepta‐2,4,6‐trien‐1‐ylidene}malononitrile, C18H17N3 (DCV[4]), are reported and discussed in comparison with their homologs having a shorter length of the π‐conjugated bridge. The compounds
2 ‐ (2 E,4 E)‐5‐ [4‐(二甲氨基)苯基]戊a2,4‐dien‐1亚基}丙二腈,C 16 H 15 N的合成,晶体结构研究和溶剂化行为3(DCV [3])和2 ‐ (2 E,4 E,6 E)‐7‐ [4‐(二甲氨基)苯基]庚2‐4、6‐trien‐1‐亚基}丙二腈,C 18高17 N 3(DCV [4]),与它们的π共轭桥长度较短的同系物相比,已有报道和讨论。该系列化合物由于其施主-受主结构而具有潜在的二阶效应,因此有可能被用作非线性材料。然而,DCV [3]和DCV [4]在中心对称空间群P 2 1 / c中结晶,这排除了它们在结晶态中作为非线性光学材料的应用。它们均在不对称单元中用两个具有相同分子构象的独立分子结晶。DCV [1] –DCV [4]系列证明了其在甲苯,氯仿和乙腈中的逆溶溶剂化行为。