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Isolation of Transient Acyclic Germanium(I) Radicals Stabilized by Cyclic Alkylamino Carbenes.

著者 Siddiqui MM , Sarkar SK , Sinhababu S , Ruth PN , Herbst-Irmer R , Stalke D , Ghosh M , Fu M , Zhao L , Casanova D , Frenking G , Schwederski B , Kaim W , Roesky HW
J Am Chem Soc.2019 Jan 11 ; ():.
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Despite the notable progress in the stabilization of main group radicals by NHCs and cAACs, no germanium radicals have been isolated so far due to synthetic challenges. Stabilization of neutral [:EIR]• (E = Si, Ge) radicals is an uphill task, as these reactive transient species are highly susceptible to dimerization. Herein, we report the synthesis of acyclic neutral germanium(I) radicals Cy-cAAC:GeN(SiMe3)Dip (1) and Me-cAAC:GeN(SiPh3)Mes (2) obtained by the reduction of [Ar(SiR3)NGeCl3] with KC8 in the presence of cAAC. Compounds 1 and 2 are well characterized by single crystal X-ray structural analysis, cyclic voltammetry and EPR spectroscopy. Furthermore, the structure and bonding of compounds 1 and 2 have been investigated by theoretical methods.
PMID: 30633503 [PubMed - as supplied by publisher]
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