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Natural Chemical Shielding Analysis of Nuclear Magnetic Resonance Shielding Tensors from Gauge-including Atomic Orbital Calculations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bohmann, Jonathan Weinhold, Frank Farrar, Thomas C. |
| Copyright Year | 1997 |
| Abstract | Nuclear magnetic shielding tensors computed by the gauge including atomic orbital (GIAO) method in the Hartree–Fock self-consistent-field (HF-SCF) framework are partitioned into magnetic contributions from chemical bonds and lone pairs by means of natural chemical shielding (NCS) analysis, an extension of natural bond orbital (NBO) analysis. NCS analysis complements the description provided by alternative localized orbital methods by directly calculating chemical shieldings due to delocalized features in the electronic structure, such as bond conjugation and hyperconjugation. Examples of NCS tensor decomposition are reported for CH4, CO, and H2CO, for which a graphical mnemonic due to Cornwell is used to illustrate the effect of hyperconjugative delocalization on the carbon shielding. |
| Starting Page | 1173 |
| Ending Page | 1184 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.474464 |
| Volume Number | 107 |
| Alternate Webpage(s) | http://www2.chemia.uj.edu.pl/~migda/Literatura/pdf/JCP01173.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.474464 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
