The HSQC (Heteronuclear Single Quantum Coherence) experiment is used to determine proton-carbon single bond correlations, where the protons lie along the observed F2 (X) axis and the carbons are along the F1 (Y) axis. An edited HSQC spectrum of …

HMBC (1H detected heteronuclear multiple bond correlation):为1H的异核多碳相关谱，将1H核和 远程 耦合的13C核关联起来，通常2~3个键的质子与碳的耦合信息较多。 释义. 长程异核位移相关谱，多键碳氢关系 (HMBC), 是NMR (核磁共振) C-H COSY (碳氢连用图谱)之中的一种. 此外还有 HMQC (异核多量子关系) HMBC给出的是远程偶合的碳氢关系，采用较小的2JcH或3JcH 偶合常数 进行调节，则可得相隔2个或3个键的碳氢相关谱（芳环体系中，可能出现跨越5根化学键的C …

1：1h-nmr谱 核磁氢谱提供了化合物分子中有无活泼氢，各种活泼氢的分配及相互位置关系等。 该谱图表明,对氨基苯甲酸乙酷分子中有五种不等性的氢(没有考虑芳环上氢的区别)。

In an HMQC spectrum, a 13 C spectrum is displayed on one axis and a 1 H spectrum is displayed on the other axis. Cross-peaks show which proton is attached to which carbon. COSY spectra show 3-bond coupling (from H-C-C-H), whereas HMQC shows a 1-bond coupling (just C-H). Take a look at n-hexylbenzene.

Gained Information: The Heteronuclear Multiple Bond Correlation (HMBC) NMR experiment is a proton-detected 2D experiment that shows you 1H / 13C multiple-bond connectivity. You will see your 1H spectrum as your direct F2 axis and your 13C chemical shifts as your indirect F1 axis.

2024年11月12日 · HMBC to Distinguish Isomers. The ability to connect spin systems is quite powerful especially when looking at isomers. When looking at the 1 H NMR and 13 C NMR of this compound, one can propose three spin systems. You could propose two possible structures containing these spin systems and an ester.

hmbc. 一维氢谱和碳谱描述了单个原子信息，2d nmr中的1h-1h cosy和hsqc，组合了相近原子间的信息，通过以上方式，我们仅知道分子的片段信息，只有再把片段与片段信息组合起来，我们才可知道整个分子的信息。

2018年9月24日 · hmbc：为1h的异核多碳相关谱，将1h核和远程耦合的13c核关联起来，通常2~3个键的质子与碳的耦合信息较多。 HSQC给出的信息是直接相连的碳氢关系，给出一键CH连接问题，而不能解决碳与季碳…

2011年1月8日 · 2D HMBC (Heteronuclear Multiple Bond Correlation) experiment correlates chemical shifts of two types of nuclei separated from each other with two or more chemical bonds. This is an improvement of the old COLOC experiment.

HMBC（Heteronuclear Multiple Bond Correlation，异核多键相关）：为1H的异核多碳相关谱，将1H核和远程耦合的13C核关联起来。也叫C-H远程相关谱, 通常2~3个键的质子与碳的耦合信息较多2JC-H,3JC-H。