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Fast, High‐Yielding Syntheses of Silsesquioxanes Using Acetonitrile as a Reactive Solvent
Author(s) -
Pescarmona Paolo P.,
van der Waal Jan C.,
Maschmeyer Thomas
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300494
Subject(s) - chemistry , acetonitrile , solvent , yield (engineering) , medicinal chemistry , organic chemistry , stereochemistry , metallurgy , materials science
New and efficient methods for the synthesis of cyclopentyl‐ and cyclohexylsilsesquioxanes are described. In the case of cyclopentylsilsesquioxane, pure trisilanol ( c ‐C 5 H 9 ) 7 Si 7 O 9 (OH) 3 was obtained selectively within 18 h in an isolated yield of 64%. The synthesis of cyclohexylsilsesquioxanes also gives high yields, but it is not selective towards a particular structural type [main products: ( c ‐C 6 H 11 ) 6 Si 6 O 9 , ( c ‐C 6 H 11 ) 6 Si 6 O 8 (OH) 2 , ( c ‐C 6 H 11 ) 7 Si 7 O 10 OH and ( c ‐C 6 H 11 ) 7 Si 7 O 9 (OH) 3 ]. We discuss the crucial role of acetonitrile as a reactive solvent in these syntheses. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)