## Abstract The analysis of the ^13^C NMR chemical shifts of 16 substituted 2โphenylthiazolidines shows that the 1,3โthiazolidโ2โyl group exerts a deshielding effect at the __ipso__ carbon (Cโ1โฒ) and shielding effects at the __ortho__ and __para__ positions of the benzene ring (Cโ2โฒ and Cโ4โฒ), and
A substituent chemical shift (SCS) effect study by 13C and 19F NMR of para-substituted phenylhalodiazirines
โ Scribed by Jacek Terpinski; Dorothy Z. Denney; Richard Beveridge; D. Phillip Cox; Robert A. Moss
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 408 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0749-1581
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๐ SIMILAR VOLUMES
## Abstract The ^13^C NMR chemical shifts of the Cโ1โฒ carbon atom of fifteen __para__โsubstituted benzophenones correlate with the โฑ and โ substituent constants in a reversed manner.
## Abstract The synthesis and assignment of ^15^N and ^13^C NMR signals of the isoxazole ring in a series of __para__โsubstituted 3โphenyl derivatives are reported. DFT calculations of ^15^N and ^13^C chemical shifts are presented and compared to observed values. Substituent effects are interpreted
## Abstract GIAO/HF and DFT methods were utilized to predict the ^13^C chemical shifts of substituted ketenimines. GIAO HF/6โ311+G(2d,p) and B3LYP/6โ311+G(2d,p) methods were applied on the optimized B3LYP/6โ31G(d) geometries and ^13^C chemical shifts of C~ฮฑ~ and C~ฮฒ~ of substituted ketenimines were