Reactions of an Isolable Dialkylgermylene with Acyl Chlorides Forming Acyl(chloro)germanes and Diacylgermanes
Organometallics(2019)
摘要
The reactions of isolable dialkylgermylene 1 with benzoyl and substituted benzoyl chlorides afford the corresponding aroyl(chloro)germanes in high yields. While 2,2-dimethylpropanoyl chloride reacts similarly, the reactions of more reactive alkanoyl chlorides such as acetyl, propanoyl, and butanoyl chlorides give rather unexpectedly the corresponding dialkanoylgermanes 3 together with alkanoyl(chloro)germanes 2 (2:3 = 4:1). Aroyl- and alkanoyl(chloro)germanes 2a–2g and dialkanoylgermanes 3e–3g obtained were fully characterized by multinuclear NMR spectroscopy, high-resolution mass spectrometry (HRMS), and by single-crystal X-ray diffraction studies for 2a and 3f. UV–vis spectra of 3e–3g and a TDDFT study of the model diacylgermanes showed two separated n → π* absorption bands, suggesting significant electronic interaction between the two carbonyl groups in a molecule through the central germanium atom.
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关键词
isolable dialkylgermylene,diacylgermanes,reactions,acyl
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