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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Syntheses, structures, luminescence and electrochemistry of benzene- and biphenyl-centered bis- and tris-1,3,2-diazaboroles and-1,3,2-diazaborolidines
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Syntheses, structures, luminescence and electrochemistry of benzene- and biphenyl-centered bis- and tris-1,3,2-diazaboroles and-1,3,2-diazaborolidines

机译：以苯和联苯为中心的双和三，1,3,2-二氮杂硼烷和-1,3,2-二氮杂硼烷的合成，结构，发光和电化学

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摘要

Reaction of 1,4-bis(dibromoboryl) benzene (1a) with 2 equiv. of the diazabutadiene (BuN)-Bu-t = CH - CH= (NBu)-Bu-t and subsequent reduction of the obtained bis(1,3,2-diazaborolium) salt 2a with sodium amalgam afforded the 1,4-bis(1,3,2-diazaborolyl) benzene 3a. Similary, 1,3-bis(dibromoboryl) benzene (1b), 1,3,5-tris(dibromoboryl) benzene (1c) and 4,4'-bis(dibromoboryl) biphenyl (1d) were converted into compounds 3b, 3c and 3d which contain two or three diazaborolyl substituents at the arene core. Treatment of precursors 1a, b, d with two equiv. or 1c with three equiv. of N,N'-di-tert-butylethane-1,2-diamine in the presence of an excess of NEt3 gave rise to the diazaborolidine derivatives 4a-4d. Reaction of 1,3-bis(diiodoboryl) benzene 1e with two equivalents of N,N'-dimethylethane-1,2-diamine in the presence of NEt3 furnished the corresponding 1,3-bis(diazaborolidinyl) benzene 4e. The novel compounds were characterized by elemental analyses and spectroscopy (H-1, C-13, B-11 NMR, MS). The molecular structures of 3c, 4a and 4e were eludicated by X-ray-diffraction analyses. In addition to this, the oxidative cyclovoltammograms and blue emission spectra of these novel compounds were discussed. Here, the electronic communication between boron heterocycles on the different spacer-units and the luminescence of the oligo-diazaborolylarenes were of interest.
机译：1,4-双（二溴硼基）苯（1a）与2当量的反应氮杂丁二烯（BuN）-Bu-t = CH-CH =（NBu）-Bu-t，然后将所得双（1,3,2-二氮杂硼硼烷）盐2a用汞齐钠还原得到1,4-bis （1,3,2-二氮杂硼烯丙基）苯3a。类似地，将1,3-双（二溴硼基）苯（1b），1,3,5-三（二溴硼基）苯（1c）和4,4'-双（二溴硼基）联苯（1d）转化为化合物3b，3c和3d，其在芳烃核上包含两个或三个二氮杂硼烷基取代基。用两个当量处理前体1a，b，d。或1分3分当量在过量NEt 3存在下，N，N′-二叔丁基乙烷-1，2-二胺的合成产生了二氮杂硼烷衍生物4a-4d。在NEt 3存在下，1，3-双（二碘硼烷基）苯1e与两个当量的N，N′-二甲基乙烷-1，2-二胺反应得到相应的1，3-双（二氮杂硼烷基）苯4e。通过元素分析和光谱（H-1，C-13，B-11 NMR，MS）表征了这些新型化合物。通过X射线衍射分析，可以鉴定出3c，4a和4e的分子结构。除此之外，还讨论了这些新型化合物的氧化环伏伏安图和蓝色发射光谱。在这里，在不同间隔基单元上的硼杂环之间的电子通信与低聚-二氮杂硼芳基芳烃的发光是令人感兴趣的。

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