Mono- und dicarbenkomplexe durch reaktion von pentacarbonyleisen mit einigen dialkylamiden des zwei- und vierwertigen zinns |
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| Authors: | Wolfgang Petz Adolf Jonas |
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| Institution: | Fachbereich Chemie der Universität Marburg/Lahn, 355 Marburg/Lahn, Lahnberge B.R.D. |
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| Abstract: | The dialkylamides of tin react with ironpentacarbonyl to form carbene complexes. With Me2Sn(NMe2)2 and Sn(NMe2)4 yellow dicarbene complexes are formed by addition of two Sn---N bonds to adjacent carbonyl groups. The two carbenoid systems on the central atom are parts of a chelate ligand connected by an ---O---Sn---O--- bridge. Using Sn(NMe2)2]2, a red monomeric compound (CO)3Fe(CONMe2)2Sn containing the same cyclic structural unit can be isolated. The free activation enthalpy of rotation about the C(carbene)---N bond in the tin (IV) dicarbene complexes was found to be 16.5 kcal mol-1. |
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