## Abstract NMR solvent effects induced by benzene in methyl substituted benzoic esters can be effectively used in the interpretation of complex NMR spectra. A 1:1 collision complex between solvent and solute is proposed, supported by dilution curve experiments and the geometry of the ‘complex’ is
Solvent effects in NMR spectra induced by benzene in amidoximes—V
✍ Scribed by N. E. Alexandrou; D. N. Nicolaides
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- English
- Weight
- 283 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Proton chemical shifts as well as solvent shifts induced by benzene in several amidoximes are examined with respect to their configuration and are compared to the solvent shifts induced in benzalanilines. The geometry of the benzene-solute 'collision-complex' is also discussed.
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## Abstract NMR solvent effects induced by benzene on several __N__‐ and __O__‐alkyl oximes are reported. Both shielding and deshielding effects are observed and are accounted for by the geometry of the solute‐solvent ‘complex’. Good Hammett plots of solvent shifts for various types of protons are
NMR solvent effects induced by aromatic solvents on some 1,4-dioxanes, 1,3-dioxolanes and on some sulphur analogue derivatives are reported. The shielding effect of the aromatic solvents is examined in respect to the structure of the solute.
## Replacement of chloroform by benzene as an NMR solvent for a series of (thio)phosphonothioamides results in an exceptionally wide range of shifts for the N-CH proton signals, from an upfield shift of approximately 1 ppm to a downfield shift of about 0.1 ppm, depending on the phosphonate esterif
## Abstract Proton chemical shifts, as well as solvent shifts induced by benzene, can be used for the structure determination of 4,5‐asymmetrically substituted 1‐(__N__‐isoimido)‐1,2,3‐triazoles, derived from the oxidation of α‐diketone bisaroylhydrazones. The geometry of the postulated ‘collision