| Autor: |
Yates, James L., Thompson, Brena L., Korchemniy, Eugene P., Rooney-Sailand, Benjamin A., Glasser, Craig M., Allen, Caleb J., Wheeler, Kraig A., Abbey, Eric R. |
| Zdroj: |
Organometallics; November 2022, Vol. 41 Issue: 21 p2933-2941, 9p |
| Abstrakt: |
This contribution describes the one-pot conversion of potassium organotrifluoroborates (KRBF3s) to their respective metal monoorganoborohydrides (MRBH3s), followed by in situcation exchange to yield monoorganoborohydrides with PPN+[N(PPh3)2]+cations. A reactivity study comparing PPN+-based borohydrides in CDCl3and their Na+-containing counterparts in DMSO-d6shows enhanced reduction ability toward aldehydes and ketones in the metal-free reactions, as well as greater atmospheric stability. Many of these compounds form crystals suitable for crystallographic assessment. Eight new X-ray structures are analyzed herein, permitting the structural comparison of [PPN]RBH3moieties to their metal-containing counterparts in the solid-state. In the absence of metal, cation and anion pack as independent units, with only weak forces contributing to crystal organization, including BH···H–C dihydrogen bonds, C–H···piinteractions, and X···H–C interactions in heteroatom-containing [PPN]RBH3s. In some instances, supramolecular interactions between RBH3–units are observed, including pi–piinteractions, and even possible F···F interactions between CF3units. |
| Databáze: |
Supplemental Index |
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