Organometallics
Organometallics
5 years ago

Synthesis, Spectroscopic Behavior, and Photoinduced Reactivity of Tetraacylgermanes

Synthesis, Spectroscopic Behavior, and Photoinduced Reactivity of Tetraacylgermanes
Georg Gescheidt, Norbert Moszner, Lukas Schuh, Judith Radebner, Roland Fischer, Michael Haas, Janine Maier, Harald Stueger, Ana Torvisco, Anna Eibel, Mario Leypold
Acylgermanes have been subject of great interest recently because of their low toxicity and the applicability as sources for germanium-centered radicals for visible-light induced free radical polymerization processes. We report on a novel and versatile method for the synthesis of tetraacylgermanes allowing the preparation of various tetra-substituted acylgermanes 1a–m. The formation of these derivatives was confirmed by NMR spectroscopy, mass spectrometry, and X-ray crystallography. UV–vis absorption spectra of the prepared compounds reveal absorption in the visible region. This transition was assigned by TD-DFT calculations. It enabled a general screening of the influence of different substitution patterns on the absorption properties. The radical formation upon irradiation was confirmed by TR-EPR spectroscopy.

Publisher URL: http://dx.doi.org/10.1021/acs.organomet.7b00539

DOI: 10.1021/acs.organomet.7b00539

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