First Introduction of an Azulenyl Group into the Bismuth and Antimony Center. Synthesis and Structure of Azulenylbismuthanes and Their Difluorides
作者:A. F. M. Mustafizur Rahman、Toshihiro Murafuji、Kei Kurotobi、Yoshikazu Sugihara、Nagao Azuma
DOI:10.1021/om040053f
日期:2004.12.1
azulenylbismuthanes into the pentacoordinated difluorides by xenon difluoride promotes the π-polarization of the azulene nucleus, which is detected as a color change in solution as well as changes in the chemical shifts of the 13C NMR spectra. A similar tendency is observed in the antimony congeners. The X-ray crystallographic study of (1,3-dichloro-2-azulenyl)diphenylbismuth difluoride (20b) reveals that intermolecular
源自氮杂,的非交替有机基配体(1,3-二氯-2-氮杂烯基)首次引入到铋和锑中心。通过二氟化氙将a烯基双muthanes转化为五配位二氟化物可促进promote核的π极化,这可通过溶液中的颜色变化以及13 C NMR光谱的化学位移的变化进行检测。在锑同类物中观察到类似的趋势。(1,3-二氯-2-氮杂烯基)二苯基二氟化铋(20b)揭示了通过五元环与七元环的相互作用在氮杂烯基之间发生了分子间π-π堆积。这可能反映了二氟化物的极化度更高的a烯基,从而加强了堆叠相互作用。