Conformation and packing of odd-numbered α-oligothiophenes in single crystals

被引:52
作者
Azumi, R
Goto, M
Honda, K
Matsumoto, M
机构
[1] AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058565, Japan
[2] AIST, Tech Serv Ctr, Res Facil Dept, Tsukuba, Ibaraki 3058565, Japan
[3] AIST, Inst Mat & Chem Proc, Tsukuba, Ibaraki 3058565, Japan
关键词
D O I
10.1246/bcsj.76.1561
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
X-ray single crystal analyses revealed the molecular geometry and molecular packing of odd-numbered alpha-oligothiophenes (septithiophene, quinquethiophene and terthiophene) in single crystals prepared by sublimation. Septithiophene crystallizes into triclinic, which is in contrast to the monoclinic packing of even-numbered oligomers. The molecular arrangement of septithiophene in a single crystal resembles that reported for even-numbered oligomers, while the molecules take a more random conformation: only one of the two terminal thienyl rings exhibits disorder and significant torsion from the conjugated plane. The X-ray diffraction data of a quinquethiophene single crystal suggest that the molecule with one of the two different orientations randomly occupies each site.
引用
收藏
页码:1561 / 1567
页数:7
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