β Scribed by J Lambert; K Wilhelm; M Klessinger
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π SIMILAR VOLUMES
## Abstract Analysis of the noise decoupled ^13^C spectra of doubly ^13^C labelled compounds where the two labelled carbons are identical, makes the determination of reltive signs of ^13^Cο£Ώ^13^C coupling constants possible in a very simple way. The involved carbon form AA'X or AA'B spin systems.
## Abstract Magnitudes and signs of ^13^Cο£Ώ^13^C coupling constants in compounds of the type Ph^13^CR^1^R^2^ο£Ώ^13^CR^1^R^2^Ph have been determined and the results are discussed in a broader context. Two types of coupling constants, __J__(Cβi, CβΞ±) and __J__(Cβi, CβΞ²), between aromatic carbon atoms an
## A" pletely substituted by heteroatoms often presents difficulties. Conventional 13C-NMR spectroscopy certainly provides signals; however, in many cases these cannot be interpreted unambiguously. Here we show that by analyzing the l3C-I3C satellites of a 13C-NMR spectrum the bonding pattern of C
Structural analysis of carbohydrates in solution has de-An empirical method was proposed recently ( 14) that predicts the magnitudes and signs of 2 J CCC and 2 J COC values pended heavily on the interpretation of vicinal 1 H-1 H spin couplings ( 3 J HH ) which can be related to molecular H-C-in carb