Disilanes with Pentacoordinate Si Atoms by Carbon Dioxide Insertion into Aminodisilanes: Syntheses, Molecular Structures, and Dynamic Behavior

Christopher Ryll; Konstantin Kraushaar; Jörg Wagler; Erica Brendler; Edwin Kroke

doi:10.1021/acsomega.1c06868

Disilanes with Pentacoordinate Si Atoms by Carbon Dioxide Insertion into Aminodisilanes: Syntheses, Molecular Structures, and Dynamic Behavior

ACS Omega. 2022 Mar 10;7(11):9527-9536. doi: 10.1021/acsomega.1c06868. eCollection 2022 Mar 22.

Authors

Christopher Ryll¹, Konstantin Kraushaar¹, Jörg Wagler¹, Erica Brendler¹, Edwin Kroke¹

Affiliation

¹ Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Strasse 29, 09599 Freiberg, Germany.

Abstract

The insertion of carbon dioxide into the Si-N bonds of aminodisilanes ((RR'N) _n Me_3-n Si)₂ affords carbamoyloxydisilanes ((RR'NC(O)O) _n Me_3-n Si)₂. Some of the obtained insertion products feature pentacoordinate silicon atoms in the solid state and in solution, with two carbamoyloxy moieties bridging the Si-Si bond. The aminodisilanes and their insertion products were extensively analyzed, including single-crystal X-ray structure analyses. The temperature dependence of the higher coordination was investigated using variable temperature NMR experiments.