3314 Table I. 13Cand 23NaNmr Spectral Data, Calculated Correlation Times, and lSNa Quadrupolar Coupling Constants for Sodium Cryptates of Ligands 1-4" Cryptate
T1(laC)> sec (4=15%)
T ~ ( ~ * Cpsec ),* (=ti573
6(23Na),eppm (=t2%)
1.05 1.25 1.oo 1.10
21.5 18.0 22.5 20.5
+11.15 -4.25 -11.40 -6.20
[1,Na+]Cl-
[2,Na+]Cl[3,Na+]Cl[4,Na+]Cl-
T,(43Na),dmsec AV(~~N Hz~ ) , ~ (3=5%) 1323~ 3 46 i 2 29 & 1 49 + 2
2.4 6.9 11 .o 6.5
X N * , ~MHz
(+lo%) 2.20 1.43 1.01 1.38
a See ref 26 for experimental details. b 13C relaxation times TI and correlation times T~ calculated according to eq 2. The values given are averages over all carbons in the molecules. The spread of TIvalues is about =tlO%. In the case Of T oan error of ~k0.009A in r C H leads to an error of =t5% in T ~ . T~ is given in picoseconds; 1 psec = 10-12 sec. c 6, shift of 23Naresonance downfield (
