. Author manuscript; available in PMC: 2009 Jul 27.

Published in final edited form as: J Am Chem Soc. 2007 Dec 8;130(1):6–7. doi: 10.1021/ja076325y

Table 1.

Fitting Parameters from the CEST Spectra

X =	effect	τ_M (µs)	Δω (ppm)	1– (M_S/M₀)
Mesomeric
CO₂^tBu	−M	352 ± 17	47.69	0.415
CN	−M	324 ± 33	47.61	0.477
H	0	269 ± 32	46.72	0.611
OMe	+M	198 ± 19	47.25	0.194
Inductive
F	−I	144 ± 8	44.98	0.347
H	0	269 ± 32	46.72	0.611
Me	+I	310 ± 55	46.89	0.113