## Abstract Sulphur diimide anions of the type [NSN]^2−^ (1), [RNSN]^−^ (1), [R = ^__t__^Bu (3), SiMe~3~ (4), ^__t__^Bu~2~P (5)] were prepared with the counter ions [^__n__^Bu~4~N]^+^ or [(Me~2~N)~3~S]^+^ (for 1, 3, 4) and K^+^ (for 5) and studied in solution by ^14^N NMR, and for assignment purpos
MCSCF calculations of nitrogen NMR shielding constants using London atomic orbitals
✍ Scribed by Michal Jaszunski; Trygve Helgaker; Kenneth Ruud; Keld L. Bak; Poul Jørgensen
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 645 KB
- Volume
- 220
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The MCSCF method is used to calculate the nitrogen shielding constants in HN3 and four isomers of CH2N2. The calculations are performed using SCF and RAS SCF wavefunctions, in both cases using London atomic orbitals. For some of the shielding constants the correlation corrections exceed 100 ppm and lead to much closer agreement with experiment.
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