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Chapter 16

Advanced Nuclear Magnetic Resonance Spectroscopy

构象柔性分子的 NMR:时间分辨率
构象柔性分子的 NMR:时间分辨率
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately ...
构象柔性分子的 ¹H NMR:变温 NMR
构象柔性分子的 ¹H NMR:变温 NMR
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one ...
不稳定质子的 NMR:时间分辨率
不稳定质子的 NMR:时间分辨率
Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding ...
课程名称: 不稳定质子的 ¹H NMR:氘 (^2H) 取代
课程名称: 不稳定质子的 ¹H NMR:氘 (^2H) 取代
This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is ...
核奥弗豪塞尔效应 (NOE)
核奥弗豪塞尔效应 (NOE)
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically ...
非灵敏核的极化转移增强(INEPT)
非灵敏核的极化转移增强(INEPT)
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and ...
双共振技术:概述
双共振技术:概述
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or ...
二维核磁共振(2D NMR)概述
二维核磁共振(2D NMR)概述
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily ...
二维核磁共振(2D NMR):同核相关技术概述
二维核磁共振(2D NMR):同核相关技术概述
Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations ...
同核相关光谱 (COSY)
同核相关光谱 (COSY)
Homonuclear correlation spectroscopy, or COSY, is a 2-dimensional NMR technique that provides information about coupled protons. Typically, the geminal ...
二维核磁共振(2D NMR):异核相关技术概述
二维核磁共振(2D NMR):异核相关技术概述
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an ...
异核单量子相关光谱 (HSQC)
异核单量子相关光谱 (HSQC)
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a ...
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