Controlled oligomerization and polymerization of pentelylboranes

该项目的目标是研究式[H2 EBH 2]（E =第15族元素（pentel））的戊基硼烷的单体母体化合物的第一种合成方法和反应性，所述单体母体化合物分别从H2 EBH 2LB和LAH 2 EBH 2型的刘易斯碱（LB）或刘易斯酸（LA）稳定的单体开始。这些前所未有的化合物，它携带唯一的氢作为取代基上的戊基硼烷核心，是极大的学术兴趣，并通过控制的低聚和聚合反应，获得了新的类别的化合物与13/15元素序列，这是应用感兴趣的材料。阿利亚，第一砷基硼烷聚合物的合成是本研究的目标。通过在五原子上引入有机取代基，所得低聚物/聚合物的溶解度增加，并且实现产物的立构规整度。对于低聚产物，长离子（猫-和阴离子）链化合物以及具有交替的15/B族原子的中性链的受控合成是感兴趣的焦点，揭示了与烷烃链的类似性。低聚物/聚合物的性质的调查是本研究的动机。此外，仅由刘易斯碱稳定的戊烯基硼烷在过渡金属的配位球的低聚反应进行了研究，以获得前所未有的无取代基的混合第13和15族元素的配体作为单体和低聚物，分别。此外，使用这些类别的化合物作为单源前体的EB材料将进行调查。

The project targets on the study of a first synthetic approach and of the reactivity of monomeric parent compounds of the pentelylborans of the formulae [H2EBH2] (E = group 15 element (pentel)) starting from Lewis base(LB)- or Lewis acid(LA)-stabilized monomers of the type H2EBH2LB and LAH2EBH2, respectively. These unprecedented compounds, which carries exclusively hydrogen as substituents on the pentelylborane core, are of great academic interest and by controlled oligomerizations and polymerizations novel classes of compounds with 13/15 element-sequences are obtained which are applicative interesting materials. Inter alia the synthesis of a first arsanylborane polymer is a target of this research. By introducing organic substituents on the pentel atom the solubility of the resulting oligomers/polymers is increased as well as a tacticity of the products is achieved. For oligiomeric products the controlled synthesis of long ionic (cat- and anionic) chain compounds and also of neutral chains with alternating group 15/B atoms are in the focus of interest revealing the analogy to alkane chains. The investigation of the properties of the oligomers/polymers is a motivation of this study. Moreover, the oligomerisation of only by a Lewis base stabilized pentelylborans in the coordination sphere of transition metals is investigated to obtain unprecedented substituent-free ligands of mixed group 13 und 15 elements as monomers and oligomers, respectively. Furthermore, the use of these classes of compounds as single source precursors for EB materials will be investigated.