Abstract

Reaction of the isolable ferrocenyldichlorogermyl anion, Fc*GeCl2− (Fc* = 2,5-bis(3,5-di-t-butylphenyl)-1-ferrocenyl), with the isolable chalcogenenyl halides resulted in the formation of the corresponding organochalcogenyldichlorogermanes that were structurally characterized. Thus, it was demonstrated the use of sterically demanding ferrocenyl groups allowed isolating stable crystalline organochalcogenyldichlorogermanes.

Highlights

  • Germanium chalcogenides are interesting chemical species for optoelectronic modules due to the appropriate combination between the electron-accepting element Ge and an electron-donating element, such as Se or Te, because the size and energy levels of frontier orbitals should be close to each other (4p and 4p/5p) [1,2]

  • Supplementary crystallographic data were deposited at the Cambridge Crystallographic Data Centre (CCDC; under reference numbers 1846194–1846197 for [2a·benzene], 2b, 5a, and 5b, respectively) and can be obtained free of charge via www.ccdc.cam.ac.uk/data_request.cif

  • Chalcogenyldichlorogermanes 5a and 5b were successfully synthesized from the reaction between an isolable ferrocenyl-substituted chlorogermylenoid and a sterically demanding ferrocenyl group (Fc*)

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Summary

Introduction

Germanium chalcogenides are interesting chemical species for optoelectronic modules due to the appropriate combination between the electron-accepting element Ge and an electron-donating element, such as Se or Te, because the size and energy levels of frontier orbitals should be close to each other (4p and 4p/5p) [1,2]. Organogermanium species that bear a chalcogen (Ch) moiety should be able to serve as building blocks for organic–inorganic hybrid materials that contain a Ge–Ch bond. Given that the Ge–Ch bond is redox-active, metallocenyl-substituted germanium chalcogenides could be promising prospective building blocks for such Ge–Ch hybrid materials. We have already prepared sterically demanding ferrocenyl groups [3,4,5,6] that are able to stabilize anionic species that bear a halogen group due to multi-hydrogen bonding [7]. The use of the sterically demanding ferrocenyl group Fc* (2,5-bis(3,5-di-t-butylphenyl)-1-ferrocenyl) enabled us to isolate the dichlorogermyl anion [Fc*GeCl2 ]− , which was identified as a chlorogermylenoid [7]

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