Synthesis, stability and bonding situation of tris-, bis- and mono[9-(azuleno[1,2-b]thienyl)]methyl cationsElectronic supplementary information (ESI) available: CV waves of compounds 7a, 8a and 9a, redox details of compounds 7a,b, 8a,b, and 9a,b along with those of 4a, 5a and 6a, ORTEP drawings and details of the X-ray analyses of compounds 2b and 9b and NMR details of the compounds reported. See http://www.rsc.org/suppdata/ob/b3/b302688d/
作者:Shunji Ito、Takahiro Kubo、Mao Kondo、Chizuko Kabuto、Noboru Morita、Toyonobu Asao、Kunihide Fujimori、Masataka Watanabe、Nobuyuki Harada、Masafumi Yasunami
DOI:10.1039/b302688d
日期:——
Stable tris-, bis- and mono[9-(azuleno[1,2-b]thienyl)]methyl cations (7a, 8a and 9a) and their derivatives, with a 6-isopropyl substituent on each azuleno[1,2-b]thiophene ring (7b, 8b and 9b) were prepared by the hydride abstraction reaction of the corresponding methane derivatives. The bonding situation of these compounds including the methane derivatives was examined by analysis of the 3J(H,H) values
稳定的三,双和单[9-(azuleno [1,2-b]噻吩基)]甲基阳离子(7a,8a和9a)及其衍生物,在每个azuleno [1,2-]上均具有6-异丙基取代基b]噻吩环(7b,8b和9b)是通过相应的甲烷衍生物的氢化物提取反应制备的。通过从1H NMR光谱分析七元环的3J(H,H)值,检查了包括甲烷衍生物在内的这些化合物的键合情况。甲烷衍生物在3J(H,H)值中表现出明显的交替模式,这表明z并核的pi系统被稠合的噻吩环扰动,显示出向局部七氟甲醚亚结构的趋势。七元环中7b和8b的3J(H,H)值表明,z腈核中仍存在交替的CC键长。在七元环中表现出几乎相等的3J(H,H)值的阳离子9a和9b在z烯核中表现出离域的tropylium亚结构的发展。对6-异丙基azuleno [1,2-b]噻吩的X射线晶体分析表明,七元环中的键长交替较大。通过9b的X射线晶体分析也证实了七元环中的键长均等化。通过测量pKR