APT与DEPT比较?

13C-APT (attached proton test) determines 13C chemical shifts and differentiates between Cq, CH, CH2, CH3 groups (positive/negative signals) Ref.: S. Patt, J.N. Shoolery, J. Magn. Reson. 46, 535-539 1982

13C-DEPT (distorsionless enhancement by polarization transfer) determines 13C chemical shifts and differentiates between CH, CH2, CH3 groups (positive/negative signals). The signals of Cq and solvent signals are suppressed. Ref.: M.R. Bendall, D.M. Doddrell, D.T. Pegg, J. Am. Chem. Soc. 103, 4603-4605 1981

APT可以测季碳，DEPT不可以

DEPT不可以测季碳???从哪里知道的呀?