Coupling constants may be either positive or negative in sign, though by just looking at an NMR spectrum it is not possible to determine the sign of the J value.Springer USdoi:10.1007/978-1-4612-4894-1_2Atta-ur-Rahman
ChemInform Abstract: MECHANISMS WHICH PRODUCE SPIN-SPIN COUPLING IN NMRanalytical chemistry, reviewNo abstract is available for this article.doi:10.1002/chin.198528399CONTRERAS R. H.NATIELLO M. A.SCUSERIA G. E.WILEY‐VCH Verlag GmbHChemischer Informationsdienst...
Volume 22, Issue 23, page no, June 11, 1991 Additional Information How to Cite SANDERS, J. C. P. and SCHROBILGEN, G. J. (1991), ChemInform Abstract: Structural Aspects of Spin-Spin Coupling in Multi-NMR Spectroscopy. ChemInform, 22: no. doi: 10.1002/chin.199123319 Author Information De...
The analysis of NMR spin–spin coupling leads to a unique insight into the electronic structure of closed-shell molecules, provided one is able to decode t... D Cremer,Jürgen Grfenstein - 《Physical Chemistry Chemical Physics Pccp》 被引量: 115发表: 2007年 Large configuration interaction calcu...
Removal of spin-spin coupling in NMR spectrum of N-vinylpyrazole by paramagnetic additivesAn explanation is given for the change in the multiplicity of the signals of the protons of the vinyl group in the NMR spectrum of 1-vinylpyrazole, taken with the addition of a nickel salt....
We address the critical use of spin-spin coupling information for extracting unbiased concentration information of metabolites based on NMR spectroscopy. This coupling information reveals a truncating status due to binning and baseline correction, termed as vertical and horizontal truncations, which are ty...
NMR Spectroscopy in Pharmaceutical Analysis Book2008, NMR Spectroscopy in Pharmaceutical Analysis B. Diehl Explore book 5.5 Heteronuclear coupling The spin–spin coupling is not restricted to protons (homonuclear couplings). All NMR-active isotopes show spin–spin couplings among each other. The type ...
spin-spin coupling/ NMR shielding tensorsindirect spin-spin coupling tensorsHCNHNCacetonitrile isomersmoleculesThe shielding and indirect spin-spin coupling tensors are calculated for HCN, HNC, CH 3 CN, and CH 3 NC, using large atomic basis sets and multiconfiguration wavefunctions that contain ...
The source of spin-spin coupling The1H-NMR spectra that we have seen so far (of methyl acetate andpara-xylene) are somewhat unusual in the sense that in both of these molecules, each set of protons generates a single NMR signal. In fact, the1H-NMR spectra of most organic molecules conta...
The source of spin-spin coupling The1H-NMR spectra that we have seen so far (of methyl acetate andpara-xylene) are somewhat unusual in the sense that in both of these molecules, each set of protons generates a single NMR signal. In fact, the1H-NMR spectra of most organic molecules conta...