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Reversal of order of chemical shifts. Differential solvent effects in the hydrogen shifts of toluene, m-xylene and o-xylene as determined by 320 MHz tritium NMR spectroscopy

✍ Scribed by Mervyn A. Long; John K. Saunders; Philip G. Williams; Allan L. Odell; R. Wayne Martin

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 227 KB
Volume: 22
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270221014

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✦ Synopsis

Chemical shifts for the aromatic tritons of toluene decrease in the order meta > para > ortho for pure toluene, but in the order meta>ortho>para for dilute solutions of toluene in carbon tetrachloride, chloroform, cyclohexane and dimethyl sulphoxide; m-xylene shifts are 5>4,6>2 in the pnre state and 5>2>4,6 in carbon tetrachloride and dimethyl snlphoxide; exylene shifts are 4,5 > 3,6 in the pnre state and reversed in carbon tetrachloride.

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Chemical shifts for tritons in the ortho

Chemical shifts for tritons in the ortho, meta and para positions of toluene as determined by tritium NMR spectroscopy

✍ D. Calvert; R. W. Martin; A. L. Odell 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB

## Abstract Chemical shifts for tritons in __ortho__, __meta__ and __para__ positions in toluene have been determined using a 64 MHz tritium NMR spectrometer. The order of shift is __meta__>__para__>__ortho__, whereas the calculated shift order for protons is __meta__>__ortho__>__para__.