Hexacyanidosilicates with Functionalized Imidazolium Counterions

Autor:	Thomas Strassner, Jörg Harloff, Karoline Charlotte Laatz, Alexander Villinger, Axel Schulz, Philip Stoer, Swantje Lerch
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Cyanides Ion pairs Silicates Structure elucidation Cyanide Adduct Inorganic Chemistry chemistry.chemical_compound Synthetic methods chemistry Ionic liquid Polymer chemistry Counterion
Zdroj:	European Journal of Inorganic Chemistry. 2020:2457-2464
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.202000281
Popis:	Functionalized imidazolium cations were combined with the hexacyanidosilicate anion, [Si(CN)6]2���, by salt metathesis reactions with K2[Si(CN)6], yielding novel ionic compounds of the general formula [R���Ph(nBu)Im]2[Si(CN)6] {R = 2-Me (1), 4-Me (2), 2,4,6-Me = Mes (3), 2-MeO (4), 2,4-F (5), 4-Br (6); Im = imidazolium}. All synthesized imidazolium hexacyanidosilicates decompose upon thermal treatment above 95 ��C (96 ��� 164 ��C). Furthermore, the hexa-borane-adduct [Mes(nBu)Im]2{Si[(CN)B(C6F5)3]6}��6CH2Cl2 (7), which is thermally stable up to 215 ��C, was obtained from the reaction of 3 with Lewis acidic B(C6F5)3. In CH3CN solution, decomposition of the hexaadduct to the Lewis-acid-base adduct CH3CN���B(C6F5)3 and [(C6F5)3B��(��-CN)��B(C6F5)3]��� was observed. All synthesized compounds were isolated in good yields and were completely characterized including single crystal structure elucidations. �� 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
Databáze:	OpenAIRE
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