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Updated: May 5, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
Cationic Group 13/14/15 Element Chain Compounds with Pnictogen-Donor Ligands
Tatiana N Parfeniuk1, Matthias T Ackermann1, Christoph Riesinger1
1Institute of Inorganic Chemistry, University of Regensburg, 93053 Regensburg, Germany.
None:
The reactivity of IDipp·GeH2BH2OTf (1) (IDipp = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) toward monodentate N-donor and bidentate pnictogen-donor ligands is reported. In the reaction of 1 with triethyl amine, the cationic adduct [IDipp·GeH2BH2·NEt3]+(2+) is formed. In contrast, primary and secondary amines exhibit a proton transfer to the germanium center, resulting in the formation of [IDipp·GeH3]+ (4+) and [IDipp·BH2·NHR'R'']+ (3+a-c) species. DFT calculations reveal that the driving force for the observed difference in reactivity is the tendency of NHEt2 to transfer a proton to 1, leading to the formation of 3a, 4, and [IDippH]+. Pyridine and aminopyridine also form stable adducts [IDipp·GeH2BH2·Py]+ (5+) and [IDipp·GeH2BH2·DMAP]+ (6+). Reactions with bidentate ligands (bipyridine and 1,2-bis(diphenylphosphino)ethane) lead to the formation of unprecedented dicationic chains composed of two [IDipp·GeH2BH2]+ units connected via the linker to form [IDipp·GeH2BH2·bipy·BH2GeH2·IDipp]2+ (72+) and [IDipp·GeH2BH2·dppe·BH2GeH2·IDipp]2+ (82+), respectively. All synthesized compounds are characterized by SC-X-ray crystallography, NMR spectroscopy, and mass spectrometry, providing insights into their structural features.
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