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A PMR investigation of organic cations - II: Mixed p-tolyl-thienyl carbonium ions (1972)

Lazzeretti, P. ; Schenetti, L. ; Taddei, F. ; [et al.]

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 4 (1972), S. 413-419

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ISSN: 0030-4921

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The PMR spectra of isomeric p-tolyl-thienyl carbonium ions and the corresponding carbinols were studied in order to compare the relative abilities of 2-thienyl, 3-thienyl and p-tolyl groups to stabilize a carbonium ion. The low field shifts in the ions relative to the neutral molecules are discussed in terms of positive charge delocalisation, as seen by a comparison with calculated π charge densities. Additionally, vicinal coupling constants fit a correlation with π bond order, but this applies only to the thienyl groups in the ionic species.

Additional Material: 5 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/mrc.1270040307

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