A new technique for differentiating between 2J(C,H) and 3/4J(C,H) connectivities

We present a new pulse sequence that yields two simultaneously detected types of long‐range correlation spectra. The one spectrum is to show all nJ(C,H) connectivities and the other is to show exclusively 2J(C,H) connectivities. The method is demonstrated by using strychnine as a test sample. A comparison with HMBC shows that the 2J(C,H)/nJ(C,H) experiment supplies a nJ(C,H) spectrum that is of equal standard with regard to sensitivity and spectral information. The additional 2J(C,H) spectrum allows the disentanglement of 2J(C,H) and nJ(C,H) signals (n > 2) in HMBC type spectra, which greatly simplifies signal assignment and structure elucidation in general.