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（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。

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)。 根据1H 的化学位移可初步确定：σ为1.3401~1.3758 的三重峰是甲考峰：4.0779的宽峰是氨上的两个氢，峰形表明这两个氢是活泼氢;4.2865-4.3399的四重峰是亚甲基峰-5.5152--6. 6505.及7.8384--7,8727 的多重峰是苯环上四个氢的峰。 2：13C-NMR谱. 碳谱能镦感地反映碳核所处化学环境的细微差别。 该谱图表明：对氨基苯甲酸乙酯分子中有七种不等性的碳核。

HSQC谱可联系相隔1个共价键的氢核和碳核，如-CH-。 如下图，当知道某氢核的谱峰位置，顺藤摸瓜，通过QC谱图，找到相对应的碳核信号。

2024年5月22日 · HSQC：异核单量子关系(heteronuclear singular quantum correlation，HSQC), 隶属于 NMR（核磁共振）C-H COSY 谱图中的一种。 HSQC与HMQC的谱图相同，都是显示1H核和与其直接相连的13C核的相关峰，其作用相应于C,H-COSY谱。

Hetereonuclear Single Quantum Coherence (HSQC) is used to determine the proton to carbon or heteroatom (often nitrogen) single bond correlations. It is also known as heteronuclear multiple quantum coherence (HMQC).

Any observed cross-peaks indicate protons that share multiple bond long-range J-coupling with carbons, say in the range of 3-10 Hz. 7-8 Hz is a great choice when setting your target long-range J-coupling constant. HMBC data is primarily used …

HSQC - Heteronuclear Multiple Quantum Correlation. This 2D experiment correlates the chemical shift of proton with the chemical shift of the directly bonded carbon. On the bottom axis is a proton spectrum and on the other is a carbon. Cross peaks give …

2012年1月1日 · Instead, we focus on two main topics. The first focus on improvements in HSQC and advantages of HSQC over HMQC which have led us to almost always favour using HSQC in place of HMQC. The second focus on improvements of the basic HMBC sequences and the importance of parameter choices for acquisition and processing of HMBC spectra.

HMQC and HSQC are equivalent in the appearance of the spectra and the processing of data. HMBC stands for heteronuclear multiple bond correlation, which is the same thing as HMQC except that...