Ackermann, Matthias T. and Szlosek, Robert and Riesinger, Christoph and Seidl, Michael and Timoshkin, Alexey Y. and Rivard, Eric and Scheer, Manfred (2024) NHC-Stabilized Mixed Group 13/14/15 Element Hydrides. CHEMISTRY-A EUROPEAN JOURNAL, 30 (12). e202303680. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
The syntheses of novel N-heterocyclic carbene (NHC) adducts of group 13, 14 and 15 element hydrides are reported. Salt metathesis reactions between NaPH2 and IDipp & sdot; GeH2BH2OTf (1) (IDipp=1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) led to mixtures of the two isomers IDipp & sdot; GeH2BH2PH2 (2 a) and IDipp & sdot; BH2GeH2PH2 (2 b); by altering the reaction conditions an almost exclusive formation of 2 b was achieved. Attempts to purify mixtures of 2 a and 2 b by re-crystallization from THF afforded a salt [IDipp & sdot; GeH2BH2 & sdot; IDipp][PHGeH2BH2PH2BH2GeH2] (4) that contains the novel anionic cyclohexyl-like inorganic heterocycle [PHGeH2BH2PH2BH2GeH2]-. In addition, the borane adducts IDipp & sdot; GeH2BH2PH2BH3 (3 a) and IDipp & sdot; BH2GeH2PH2BH3 (3 b) as even longer chain compounds were obtained from reactions of 2 a/2 b with H3B & sdot; SMe2 and were studied by NMR spectroscopy. Accompanying DFT computations give insight into the mechanism and energetics associated with 2 a/2 b isomerization as well as their decomposition pathways. Reactions of the NHC-stabilized compound IDipp & sdot; GeH2BH2OTf with NaPH2 were carried out. Hereby, mixtures of isomers of the unprecedented parent hydride adducts IDipp & sdot; GeH2BH2PH2 and IDipp & sdot; BH2GeH2PH2 were isolated in different ratios in favour of the latter isomer, depending on the reaction conditions. Subsequent reactions of these isomers yielded the borane adducts IDipp & sdot; GeH2BH2PH2BH3 and IDipp & sdot; BH2GeH2PH2BH3 as well as the cyclohexyl-like anion [PHGeH2BH2PH2BH2GeH2]-. image
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHEMISTRY; GALLIUM; OLIGOMERIZATION; DERIVATIVES; CHAINS; BORON; carbenes; boron; germanium; phosphorus; inorganic hydrides |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Jan 2026 05:55 |
| Last Modified: | 14 Jan 2026 05:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64425 |
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