Authors:	Beck, Alexander D. Haufe, Stefan Tillmann, Jan Waldvogel, Siegfried R.
Title:	Challenges in the electrochemical synthesis of Si2Cl6 starting from tetrachlorosilane and trichlorosilane
Online publication date:	24-Oct-2022
Year of first publication:	2022
Language:	english
Abstract:	The strongly increasing demand for nano- and microelectronics calls for new and environmentally benign reaction pathways for the preparation of one of the most important substrates in the production of semiconductor materials: Si2Cl6. We present a comprehensive study of the opportunities and challenges for the selective electrochemical formation of higher halo-functionalized silanes to Si2Cl6 achieved by cyclic voltammetry measurements and electrochemical synthesis. Cathodic dehalo-dimerization reaction of SiCl4 and the approach to halogen exchange for better substrate reduction are envisioned. An anodic halide-free dimerization pathway by dehydrogenation of HSiCl3 is investigated, including Lewis acid activation of the Si−H bond. In addition, tertiary amine-driven, Benkeser-like in-situ formation of a SiCl3− anion was tested as well. The target molecule Si2Cl6 is strongly promoted to direct electro-conversions making the anodic and cathodic electrosynthesis very challenging.
DDC:	540 Chemie 540 Chemistry and allied sciences
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 09 Chemie, Pharmazie u. Geowissensch.
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-8022
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY-NC-ND
Information on rights of use:	https://creativecommons.org/licenses/by-nc-nd/4.0/
Journal:	ChemElectroChem 9 1
Pages or article number:	e202101374
Publisher:	Wiley-VCH
Publisher place:	Weinheim
Issue date:	2022
ISSN:	2196-0216
Publisher DOI:	10.1002/celc.202101374
Appears in collections:	JGU-Publikationen