𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On molecular orbital theories of NMR chemical shifts

✍ Scribed by R. Ditchfield


Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
312 KB
Volume
15
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis


Carbon and proton NhfR chemical shifts are calculated for some small polyntomic molecules using ab-initio rnolecu!nr orbital theory with a minimal basis set of gauge invaiant atomic orbit& (GWO). The results are compared with those obtained without gauge factor!; and both sets of calculated values are compared with experiment. The overall agreement with experiment is much better for the GIAO results parkularly for proton chemical shifts.


πŸ“œ SIMILAR VOLUMES


Molecular orbital theory of carbon NMR c
✍ R. Ditchfield; D.P. Miller; J.A. Pople πŸ“‚ Article πŸ“… 1970 πŸ› Elsevier Science 🌐 English βš– 253 KB

Carbon NMFI chemical shifta are calculated for a group of polyatomic molecules using ab initio moIecular orbital theory with a basis of contracted gauesian functions. The results are overall ia good agreement with experimental values.

How 77Se NMR Chemical Shifts Originate f
✍ Waro Nakanishi; Satoko Hayashi; Masahiko Hada πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 378 KB

## Abstract Plain rules founded in a theoretical background are presented that can be used to determine the structure of selenium compounds on the basis of __Ξ΄__(Se) data and to predict __Ξ΄__(Se) data from a given structure with satisfactory accuracy. As a first step to establish such rules, the or

Reaction field spectral shifts with semi
✍ Gregory J. Tawa; Richard L. Martin; Lawrence R. Pratt πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 197 KB

A macroscopic solution polarization free-energy functional is combined with semiempirical molecular orbital theory to study shifts of electronic absorption energies for several molecules in solution. The present method requires calculation of the induced electrostatic potential on the van der Waals

Thermochemical interpretation of ESCA ch
✍ D.C. Frost; F.G. Herring; C.A. McDowell; I.S. Woolsey πŸ“‚ Article πŸ“… 1972 πŸ› Elsevier Science 🌐 English βš– 575 KB

The ESCA chemical shifts of carbon and nitrogen in a variety of chemical ekironments have been calculated from the energy difference (aE) between the pgent molecule and the isoelectronic nitrogen and oxygen containiiv& Lotions using the hIINDO/I valence electron SCF MO method. For the case of carbo

Calculation of NMR chemical shifts at se
✍ JΓΌrgen Gauss πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 518 KB

Formulas for calculating NMR chemical shifts at second-order many-body perturbation theory using the gauge-including atomic orbital method are presented and their implementation is discussed. The method is applied to study correlation effects on calculated ~70 chemical shifts,