Frozen-in non-equilibrium rotamer mixtures in 1,2-diarylethylenes obtained by low-temperature irradiation
作者:Nelly Castel、Ernst Fischer
DOI:10.1016/0022-2860(85)80160-5
日期:1985.2
Abstract trans -1,2-Di(2-naphthyl)-ethylene, formed in rigid media by UV irradiation of its cis isomer, comprises a mixture of three modifications, not in equilibrium with each other, that are tentatively assigned to the three possible rotamers. At somewhat lower viscosities, in the range 10 8 –10 9 cP, equilibrium is established. Detection is by emission-spectroscopic methods. Three other related
摘要 trans -1,2-Di(2-naphthyl)-ethylene,在刚性介质中通过其顺式异构体的紫外线照射形成,包含三种修饰的混合物,彼此不平衡,暂时分配给三种可能的旋转异构体。在稍低的粘度下,在 10 8 –10 9 cP 范围内,建立平衡。检测是通过发射光谱法。其他三种相关化合物仅表现出轻微的同类作用。