Szlosek, Robert and Niefanger, Amelie Sophie and Balazs, Gabor and Seidl, Michael and Timoshkin, Alexey Y. and Scheer, Manfred (2024) Characterization of the Ligand Properties of Donor-stabilized Pnictogenyltrielanes. CHEMISTRY-A EUROPEAN JOURNAL, 30 (12). e202303603. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
A general synthesis and the characterization of novel alkyl-substituted NHC-stabilized pnictogenylboranes NHC & sdot; BH2ER2 (NHC=N-heterocyclic carbene, E=P, As; R2=Me2, Ph2, tBuH, Cy2, (SiMe3)2) are reported. These compounds were reacted with Ni(CO)4 to the corresponding complexes of the type [(NHC & sdot; BH2ER2)Ni(CO)3] to determine their donor strength by Tolman Electronic Parameters (TEPs) and their steric demand as ligands compared to classical phosphines, superbasic phosphines and other commonly applied donor systems. The results show that the NHC-stabilized pnictogenyltrielanes can be considered as being highly basic, while their steric influence depends strongly on the organic residues as well as the donor attached to the {BH2} moiety. Although weaker than commonly used superbasic phosphines, the donor strength of pnictogenyltrielanes in general can be classified as of similar strength as NHCs. The steric and electronic properties can easily be modified by alkyl substitution as evident from the TEP trends. The syntheses and characterizations of alkyl-substituted compounds IDipp & sdot; BH2ER2 (E=P, As; R=alkyl) are presented. Together with other donor-stabilized pnictogenyltrielanes, these compounds were reacted with Ni(CO)4 and their ligand properties evaluated regarding the steric and electronic nature of this class of compounds. According to the corresponding Tolman Electronic Parameters, the compounds are significantly more electron-rich than regular phosphines and their steric and electronic demands can be modified easily.image
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HETEROCYCLIC CARBENE LIGANDS; ELECTRON-RICH LIGANDS; PHOSPHORUS LIGANDS; COMPLEXES; PARAMETERS; PHOSPHINES; NHC; OLIGOMERIZATION; RHODIUM; CHAINS; 13/15 compounds; ligand properties; pnictogen; tolman electronic parameter; triels |
| 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 05:43 |
| Last Modified: | 14 Jan 2026 05:43 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64224 |
Actions (login required)
 |
View Item |
