hyperpolarizabilities being largest for the strongest R-substituent donors. AM1 calculations have been performed on these compounds, showing reasonable agreement with the experimentally obtained bond lengths and hyperpolarizabilities, as well as on several related hypothetical compounds containing multiple C==C bonds, most of which are proposed to have even larger hyperpolarizabilities.
(pR-苯基)二聚三氢
呋喃酮(R = Me(2)N,MeO,MeS,Br,I),(pR-苯基
乙炔基)二聚三氢
呋喃酮(R = Me(2)N,MeO,MeS,H),(E) -[2-(pR-苯基)
乙烯基]二聚异
戊烯酮(R = Me(2)N,H(2)N,MeO,MeS,H,CN,NO(2)),(E)-[2-(2 -
噻吩基
乙炔基]二聚三ane烷和(E)-[2-(邻-碳烷基)
乙烯基]二mes杂
硼烷是通过适当的pR-苯基-和pR-苯基
乙炔基
锂试剂与二聚二
氟磺隆氟化物反应并通过适当的
硼氢化制备的pR-
苯乙炔,2-
乙炔基
噻吩和邻
乙炔基碳
硼烷与二甲烯基
硼烷。在多种溶剂中记录了它们的UV / Vis吸收和发射光谱,其中供体取代的化合物的荧光最大值特别是在高极性溶剂中表现出大的红移现象,指示电荷转移导致在激发态下产生大的偶极矩。(pR-苯基)二聚
异丁烯酮(R = Me(2)N,MeO,MeS,Br,I),(E)-