Series of Protonated Nitrogen Bases with a Weakly Coordinating Counteranion: Observation of the 14N-1H Spin-Spin Coupling

被引：0
|
作者：
Carrasco, Maria C. [1 ]
Khan, Firoz Shah Tuglak [1 ]
Hematian, Shabnam [1 ]
机构：
[1] Univ North Carolina Greensboro, Dept Chem & Biochem, Greensboro, NC 27402 USA
来源：
ACS ORGANIC & INORGANIC AU | 2023年 / 4卷 / 01期
基金：
美国国家科学基金会;
关键词：
Protonated nitrogen bases; NMR spectroscopy; Nitrogen-14 nuclear quadrupole effects; Solvent effects; Ion pairing; NUCLEAR-MAGNETIC-RESONANCE; QUADRUPOLE RELAXATION; ACID-BASE; NMR; BASICITY; PYRIDINE; PK(A); BOND; ACETONITRILE; EQUILIBRIUM;
D O I：
10.1021/acsorginorgau.3c00045
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A distinguished triplet splitting pattern for the N-14-H-1 couplings in the proton signals of a series of protonated nitrogen bases-aliphatic and aromatic amines, as well as pyridines-with the weakly coordinating tetrakis(pentafluorophenyl)borate anion, [B(C6F5)(4)](-), is observed for the first time in nonaqueous media at room temperature. The effects of ion pairing, solvent parameters, and correlation between the delta(H), (1)J(NH), and pK(a) values are reported.
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页码：91 / 96
页数：6
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