Heteronuclear Multiple Bond Correlation Spectroscopy with gradient selection. J filter to suppress one-bond couplings. No decoupling during acquisition.
Correlates chemical shifts of 1H nuclei multiple bonds away from 13C sites
Scans per Slice
(ns)
Dummy Scans
(ds)
Recycle
Delay
(d1)
FID Size
(TD, F2)
# Slices
(TD, F1)
F2/F1 Spectral
Width
(sw,ppm)
Spectral
Center
(o1p/o2p, ppm)
2 x ns (4)
16
2
4096
128
13/220
6.00/100.0
Experiment Setup
Use getprosol or prosol button to read in proper pulse parameters
Set cnst2 = 1JCHcoupling constant: default cnst2 = 145 Hz
Set cnst13 = nJCH longest range coupling constant: default cnst13 = 10 Hz
Processing Notes
Fourier transform with the command xfb
Manually phase F2 and F1 dimensions
Use commands abs2 and abs1 for baseline correction
For improved resolution, can try applying linear prediction in the F1 dimension. In the ProcPars tab set the following parameters:
ME_mod = LPfr
NCOEF = set to 3 times the number of cross peaks in your spectrum.
