Α-五联噻吩可用作医药合成中间体。若吸入Α-五联噻吩,请将患者移至空气新鲜处;如皮肤接触,应脱去污染衣物,并用肥皂水和清水彻底冲洗皮肤;如有不适,应及时就医;如眼睛接触,应分开眼睑,用流动清水或生理盐水冲洗,并立即就医;如误食,应立即漱口,禁止催吐,并尽快就医。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
α-四联噻吩 | quaterthiophene | 5632-29-1 | C16H10S4 | 330.519 |
alpha-三联噻吩 | 2,2':5',2''-terthiophene | 1081-34-1 | C12H8S3 | 248.394 |
—— | 5,5''-diiodo-2,2':5',2''-terthiophene | 104499-99-2 | C12H6I2S3 | 500.187 |
2,5-二(5-溴噻吩-2-基)噻吩 | 5,5'-dibromo-2,2':5'2''-terthiophene | 98057-08-0 | C12H6Br2S3 | 406.186 |
2-溴-5-(5-噻吩-2-基噻吩-2-基)噻吩 | 5-bromo-2,2':5',2''-terthiophene | 94581-95-0 | C12H7BrS3 | 327.29 |
2,2'-联二噻吩 | 2,2'-Bithiophene | 492-97-7 | C8H6S2 | 166.268 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5,5''''-diformyl-2,2':5',2'':5'',2''':5''',2''''-quinquethiophene | 182181-89-1 | C22H12O2S5 | 468.666 |
A new synthetic route to mononitrated oligothiophenes is described, as well as the preparation of halogenated derivatives (Br, I) thereof. An unusual deep red colour is observed and explained, with the aid of DFT calculations, as arising from a significant quinoidal contribution to the molecular structure. The crystal structures of two compounds, H(C4H2S)3NO2 and Br(C4H2S)3NO2, are presented. Both compounds have planar sheets held together by intermolecular short contacts (hydrogen bonds and, for the latter, NO2···Br interactions); the sheets do not directly superimpose, so the effect of the π-stacking is not maximized. Solid-state fluorescence and extended-Hückel band-structure calculations are also presented for these materials.