1. Synthesis, Structures, and Reactivities of BCN-Heterocyclic B–N Chains
- Author
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Zhang, Chen, Jiang, Xin, Jing, Yi, Zhang, Na, Wang, Peng, Wang, Hongju, Jiang, Kai, Chen, Xi-Meng, and Chen, Xuenian
- Abstract
The BCN-heterocyclic B–N chain compounds, the sodium and potassium salts of 3and 4anions (Na3, Na4, and K4), were synthesized by reactions of ethane 1,2-diamineborane (BH3NH2CH2CH2NH2BH3, 1) and propane 1,2-diamineborane (BH3NH2CH2CH2CH2NH2BH3, 2) with MH (M = Na and K). Then, the neutral B–N chain compounds 5and 6were prepared with dehydrogenation of [NH4]3and [NH4]4, formed by metathesis reactions of Na3and Na4with NH4Cl or NH4SCN, respectively. Compounds 7and 8, analog 5, were also prepared using pyridine and 4-methoxypyridine instead of NH3in 5. These synthesized compounds were characterized spectroscopically, and the singe-crystal structures of the Na3·18-crown-6 and K4·18-crown-6 adducts were determined. Furthermore, the reactions of Na3and Na4with cationic B–N chain compounds, [NH3BH2NH3]Cl and [NH3BH2NH2BH2NH3]Cl, could not form longer BCN-heterocyclic B–N chain. The solubility of metal hydrides, the ability for proton abstracting, the basicity of Lewis bases, and the chelate effect may influence these reactions even though the reaction mechanism is not fully understood.
- Published
- 2024
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