So if you run an HMBC and either have expected correlations missing or you want to know if an observed signal is over 2 bonds or more, you should give H2BC a try. STD The saturation transfer ...

Bruker-500, A1: cryo-1H optimized, Excellent for 1D 1H experiments, such as acquiring 1D 1H NMR data; optimum for 1H detected experiments, such as 2D's 1H-13C(X): HMQC(HSQC), HMBC, etc. -- Bruker-500, ...