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Making Use of the Direct Process Residue: Synthesis of Bifunctional Monosilanes
Author(s) -
Sturm Alexander G.,
Santowski Tobias,
Schweizer Julia I.,
Meyer Lioba,
Lewis Kenrick M.,
Felder Thorsten,
Auner Norbert,
Holthausen Max C.
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201901881
Subject(s) - bifunctional , residue (chemistry) , chemistry , bond cleavage , ether , combinatorial chemistry , organic chemistry , catalysis
The industrial production of monosilanes Me n SiCl 4− n ( n =1–3) through the Müller–Rochow Direct Process generates disilanes Me n Si 2 Cl 6− n ( n =2–6) as unwanted byproducts (“Direct Process Residue”, DPR) by the thousands of tons annually, large quantities of which are usually disposed of by incineration. Herein we report a surprisingly facile and highly effective protocol for conversion of the DPR: hydrogenation with complex metal hydrides followed by Si−Si bond cleavage with HCl/ether solutions gives (mostly bifunctional) monosilanes in excellent yields. Competing side reactions are efficiently suppressed by the appropriate choice of reaction conditions.