INADEQUATE experiment is quite problematic. Firstly you need to calibrate 90 degree carbon pulse (it's not that easy as in case of proton). If I recall correctly BBI 400 MHZ probe is designated for 5 mm tubes. 10 mm would be better choice for INADEQUATE. Concentration of compound is crucial for this kind of experiment. If you want to obtain this spectrum in reasonable time, concentration should be at level that will allow you to obtain one dimensional 13C spectra with signal to noise ratio value about 20. 20 (from one scan !). (Propability to find 13C-13C bond is about 0,0121% ) Try to run ADEQUATE experiment. Unfortunately avaible only for carbons directly connected with protons.

Good luck Arkadiusz Leniak

INADEQUATE experiment is quite problematic. Firstly you need to calibrate 90 degree carbon pulse (it's not that easy as in case of proton). If I recall correctly BBI 400 MHZ probe is designated for 5 mm tubes. 10 mm would be better choice for INADEQUATE. Concentration of compound is crucial for this kind of experiment. If you want to obtain this spectrum in reasonable time, concentration should be at level that will allow you to obtain one dimensional 13C spectra with signal to noise ratio value about 20 (from one scan !). (Propability to find 13C-13C bond is about 0,0121% ) Try to run ADEQUATE experiment. Unfortunately avaible only for carbons directly connected with protons.

Try to run this experiment for some small molecule with different types of carbon atoms. For example menthol is quite useful for it (it has great solubility in CDCl3). Concetration of 100 mg/ml should be ok. Please tell me your values of parameters TD1, AQ, NS, DS, SW, O1P.

Good luck Arkadiusz Leniak