中文摘要：

一种结构明确的新结构四联噻吩化合物：5，5＇-[2，5-二（三甲基硅）-3-噻吩]基-2，2＇-联噻吩（1）被有效合成出来．以2，3。联噻吩（4）为建筑模块，通过NBS选择性溴代高产率得到5溴-2，3。联噻吩（5），进而通过氯化铜氧化偶联有效的合成出1-本文还对目标产物的单晶结构和紫外吸收光谱进行了分析．

英文摘要：

A new structurally well-defined tetrathiophene, 5, 5＇-bis （2, 5 bis （trimethylsiiyl）-thiophene-3-yl）-2, 2＇- bithiophene （1） has been efficiently synthesized with 2, 3＇-bithiophene （4） as the building block. During the bromination of 4 with NES, 5-bromo-2,3＇-bithiophene （5） can he generated in a good yield with high selectivity. The title compound 1 was efficiently obtained by CuC12 promoted oxidative coupling of bithiophenyl lithium. In addition, the single crystal structure and UV-vis absorbance spectrum of the title tetrathiophene have been described.