Syntheses of cyclic diselenides through diselenolates and the following deselenation reactions by means of three ways were studied. The preparation of the cyclic diselenides in the presence of excess sodium borohydride gave thirty-eight diselenides containing diselena[3.3]cyclophanes and alicyclic diseleno compounds in high yields in addition to two triple-bridged selenacyclophanes. Photodeselenation
Threeisomeric triple-layered and two isomeric quadruple-layered charge transfer cyclophanes containing benzoquinone and dimethoxybenzene moieties have been synthesized together with two triple-layered and two quadruple-layered paracyclophanequinones. The structures of the isomers were determined by 1H- and 13C-NMR spectra and/or alternative syntheses. By comparing the CT bands of a series of dime
Layered Compounds. LXII. Triple-layered [<i>m</i>.<i>m</i>][<i>n</i>.<i>n</i>]Paracyclophanes: Syntheses and Spectra
作者:Tetsuo Otsubo、Takashi Kohda、Soichi Misumi
DOI:10.1246/bcsj.53.512
日期:1980.2
A series of the title cyclophanes (m, n=2–4) were synthesized by the thermal- and photo-desulfurization methods from dithia intermediates. Their absorption and emission spectra were measured to examine the transannular electronic interaction. The absorption spectra of the title compounds and their TCNE complexes gave the same order of the interaction as seen in the case of double-layered system: [2.2]>[3.3]>[4.4] in neutral state and [3.3]>[2.2]>[4.4] in CT state. The emission spectra are discussed in terms of the existence of excited trimer.