Synthese und Kristallstruktur des trimeren [(Me3Si)2CH]2Al?CN |
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Authors: | Werner Uhl Uwe Schütz Wolfgang Hiller Maximilian Heckel |
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Abstract: | Synthesis and Crystal Structure of the Trimeric (Me3Si)2CH]2Al? CN Tetrakisbis(trimethylsilyl)methyl]dialane(4) 1 with an Al? Al bond reacts with tert-butyl isocyanide in the molar ratio of 1:2 within three days to give a mixture of several unknown products, from which the title compound 4 is isolated in a 26% yield by recrystallization from n-pentane. 4 is a trimer in the solid state via Al? C?N? Al bridges showing a nine-membered Al3C3N3 heterocycle in a boat conformation. In contrary to the reaction with phenyl isocyanide the expected dark red product of the twofold insertion into the Al? Al bond under formation of a carbon-carbon single bond is detected only spectroscopically as a minor by-product. |
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Keywords: | Al?Al bond insertion reaction with tert-butyl isocyanide trimeric cyano dialkyl alane |
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