A Neutral η 5 -Aminoborole Complex of Germanium(II).

Authors :: Tholen P
Dong Z
Schmidtmann M
Albers L
Müller T
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2018 Oct 01; Vol. 57 (40), pp. 13319-13324. Date of Electronic Publication: 2018 Sep 07.
Publication Year :: 2018
Abstract: The synthesis of two η <superscript>5</superscript> -aminoborole complexes of germanium(II) from the reaction of a germole dianion with aminoboron dichlorides is reported. This reaction constitutes a remarkable example of a germole-to-borole transformation. The two aminoborole complexes of germanium(II) were fully characterized by multinuclear NMR spectroscopy, IR spectroscopy, HRMS, and, in one case, by X-ray crystallography. The results of quantum-mechanical calculations favor the electronic structure of a half-sandwich complex of Ge <superscript>II</superscript> over an ionic representation with a germanium dication stabilized by an aromatic aminoborole dianion.<br /> (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)