Leszczyńska Kinga I, Huch Volker, Präsang Carsten, Schwabedissen Jan, Berger Raphael J F, Scheschkewitz David
Krupp-Chair of Inorganic and General Chemistry, Saarland University, Campus Saarbrücken C41, 66123, Saarbrücken, Germany.
Division of Materials Chemistry, University of Salzburg, 5020, Salzburg, Austria.
Angew Chem Int Ed Engl. 2019 Apr 1;58(15):5124-5128. doi: 10.1002/anie.201811331. Epub 2019 Mar 8.
Small- to medium-sized clusters occur in various areas of chemistry, for example, as active species of heterogeneous catalysis or as transient intermediates during chemical vapor deposition. The manipulation of stable representatives is mostly limited to the stabilizing ligand periphery, virtually excluding the systematic variation of the property-determining cluster scaffold. We now report the deliberate expansion of a stable unsaturated silicon cluster from six to seven and finally eight vertices. The consecutive application of lithium/naphthalene as the reducing agent and decamethylsilicocene as the electrophilic source of silicon results in the expansion of the core by precisely one atom with the potential of infinite repetition.
中小型簇合物出现在化学的各个领域，例如，作为多相催化的活性物种或化学气相沉积过程中的瞬态中间体。对稳定簇合物的处理大多局限于稳定配体的外围，实际上排除了决定性质的簇骨架的系统变化。我们现在报告了一个稳定的不饱和硅簇从六个顶点依次扩展到七个，最终扩展到八个顶点的过程。连续使用锂/萘作为还原剂和十甲基硅茂作为硅的亲电源，可使核心精确地逐个原子扩展，且具有无限重复的潜力。
