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Long-range 13C1H coupling constants in 3-carene and α-pinene

✍ Scribed by Aleksej Y. U. Denisov; Evgenij A. Tyshchishin; Aleksej V. Tkachev; Viktor I. Mamatyuk

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
433 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Long‐range ^13^C^1^H coupling constants exceeding 0.3 Hz were measured for the hydrocarbons 3‐carene and α‐pinene by a heteronuclear 2D J‐resolved proton‐flip experiment with selective proton excitation. The dependences of the vicinal ^3^J(C, H) coupling constants on the dihedral angles were studied, and the peculiarities of the couplings through the double bond and cyclopropane framework were demonstrated. The dependences of the ^4^J(C, H) coupling constants in the allylic fragments of the molecular framework are discussed, and the long‐range ^n^J(C, H) coupling constants with the olefinic protons in camphene were investigated for the same purpose.

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