Syntheses and Physical Properties of Several Octiphenyls Containing Mixed Linkages
Syntheses and Physical Properties of Several Octiphenyls Containing Mixed Linkages
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DOI：
10.1248/cpb.29.344
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发表时间：
1981-02
影响因子：
1.7
通讯作者：
S. Ozasa;Y. Fujioka;M. Tsukada;E. Ibuki
中科院分区：
文献类型：
--
作者：
S. Ozasa;Y. Fujioka;M. Tsukada;E. Ibuki
通过碘代四联苯的Ullmann均偶联反应，合成了8个新的含两种或三种键的直链八联苯。其中，5个化合物是在双乙酰丙酮合镍（II）存在下，由联苯基溴化镁与二碘四联苯或三联苯基碘化镁与二碘四联苯通过Kharash型Grignard偶联反应交替合成的。光谱研究证明，这样制备的八联苯显示出高度特征的红外，紫外和核磁共振光谱。经验Huckel分子轨道计算的最长波长的吸收带的octiphenyls也进行了。除了两种化合物的情况外，计算的波长和观测的波长相当一致。
Eight new linear octiphenyls containing two or three kinds of linkage were synthesized by the Ullmann homo-coupling reaction of iodoquaterphenyl. Among them, five compounds were alternatively synthesized by the Kharash-type Grignard cross-coupling of biphenylylmagnesium bromide and diiodoquaterphenyl or of terphenylylmagnesium iodide and diiodoquaterphenyl in the presence of bis (acetylacetonato) nickel (II). Spectral studies proved that the octiphenyls thus prepared displayed highly characteristic infrared, ultraviolet, and nuclear magnetic resonance spectra. Empirical Huckel molecular orbital calculations of the longest wavelength absorption bands of the octiphenyls were also performed. The calculated and observed wavelengths were in rather good agreement, except for the cases of two compounds.