1H,13C and15N NMR spectroscopic, x-ray structural andab initio/HF studies on nitramino andN-alkylamino-4-nitro derivatives of pyridineN-oxides and pyridines
作者:Katri Laihia、Erkki Kolehmainen、Elina Virtanen、Maija Nissinen、Aniela Puszko、Zofia Talik
DOI:10.1002/mrc.1224
日期:2003.9
The 1H, 13C and 15N NMR spectra in DMSO‐d6 were measured for eight nitraminopyridine N‐oxides, ten 4‐nitropyridine N‐oxides, four 2‐nitraminopyridines and five 4‐nitropyridines. Their chemical shift assignments are based on PFG 1H,X (X = 13C and 15N) HMQC and HMBC experiments. The relative energies for the tautomers of two nitraminopyridine N‐oxides were determined by ab initio HF/6–311G** calculations
测量了 DMSO-d6 中 8 种硝基氨基吡啶 N 氧化物、10 种 4-硝基吡啶 N 氧化物、4 种 2-硝基氨基吡啶和 5 种 4-硝基吡啶的 1H、13C 和 15N NMR 光谱。他们的化学位移分配基于 PFG 1H,X(X = 13C 和 15N)HMQC 和 HMBC 实验。两种硝基氨基吡啶 N 氧化物互变异构体的相对能量通过从头算 HF/6–311G** 计算确定。对 4-甲基-2-硝基氨基吡啶进行了单晶 X 射线结构分析:C6H7O2N3,M = 153.15,三斜晶系,空间群 P-1(第 2 号),a = 7.0275(4),b = 6.8034( 3), c = 8.6086(5) Å, α = 103.620(2), β = 90.309(2), γ = 122.215(3)°, V = 334.11(3) Å3, Z = 2. 版权所有 © 2003 John Wiley父子有限公司