Isolable Geminal Bisgermenolates: A New Synthon in Organometallic Chemistry

Abstract

We have synthesized the first isolable geminal bisenolates L2K2Ge[(CO)R]2 (R=2,4,6‐trimethylphenyl (2 a,b), L=THF for (2 a) or [18]‐crown‐6 for (2 b)), a new synthon for the synthesis of organometallic reagents. The formation of these derivatives was confirmed by NMR spectroscopy and X‐ray crystallographic analysis. The UV/Vis spectra of these anions show three distinct bands, which were assigned by DFT calculations. The efficiency of 2 a,b to serve as new building block in macromolecular chemistry is demonstrated by the reactions with two different types of electrophiles (acid chlorides and alkyl halides). In all cases the salt metathesis reaction gave rise to novel Ge‐based photoinitiators in good yields.

Recent Advances in Type I Photoinitiators for Visible Light Induced Photopolymerization

“…This compound represents a new synthon for the synthesis of a variety of different acylgermanes in good yields (Figure 19). [64] Figure 13. Acetyltriphenylgermane for the generation of germyl radicals.…”

“…Isolated acylgermanes using bisgermenolates as synthon. [64] Figure 20. Tetraacylstannanes as stannyl radical source.…”

“…This compound represents a new synthon for the synthesis of a variety of different acylgermanes in good yields (Figure 19). [64] …”

Isolable Geminal Bisgermenolates: A New Synthon in Organometallic Chemistry

“…Furthermore, the formation of these derivatives was confirmed by NMR spectroscopy and X-ray crystallographic analysis. [24] Moreover, the efficiency of 2 a,b to serve as new building block in macromolecular chemistry is demonstrated by the reactions with two different types of electrophiles (acid chlorides and alkyl halides). In all cases the salt metathesis reaction gave rise to potential novel Ge-based photoinitiators in good yields.…”

Synthesis and Characterization of New Counterion-Substituted Triacylgermenolates and Investigation of Selected Metal–Metal Exchange Reactions

“…In general, the synthesis of HG 14 enolates was focused exclusively on lithium and potassium derivatives. 1 − 4 , 9 − 15 Other counterions were not investigated so far, although they can significantly influence the reactivity and the structural properties of these enolates. Consequently, the aim of this study was to introduce new counterions.…”