## 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 dihedr
Long range carbon—carbon coupling in olefins. 4-13C-4-propyl-3-heptene and 1-13C-1-methylcyclohexene
✍ Scribed by James L. Marshall; Denis E. Miller
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 333 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
All ^13^C—^13^C splittings involving the C‐4 carbon of 4‐propyl‐3‐heptene and the C‐1 carbon of 1‐methylcyclohexene were determined from the appropriately labeled (> 90%‐^13^C) derivatives. The observed trends in coupling constants continue to offer additional means of carbon chemical shift assignments and to provide mechanistic information regarding the nature of long range carbon—carbon coupling.
📜 SIMILAR VOLUMES
We propose the 13 C-detecting 1D DEPT long-range C-C relay to detect super long-range H-C connectivity via four bonds ( 1 H-13 C-X-X-13 C, X represents 12 C or heteronuclear). It is derived from the DEPT C-C relay which detects the H-C correlations via two bonds ( 1 H-13 C-13 C) by setting the delay
## Abstract The ^31^P^31^P and ^13^C^31^P coupling constants in 1,6‐diphosphatriptycene have been obtained from analysis of its proton decoupled ^13^C n.m.r. spectra. More accurate data, however, resulted from simultaneous analysis of the proton decoupled ^13^C spectra and ^31^P(^13^C) satellite