Fig. 5. (Left) 1H NMR (500 MHz with a cryoprobe, D2O, 333 K) spectra of (a) cis,cis-8⊂[2·Pd]6+, (b) trans,cis-9⊂[2·Pd]6+ and (c) cis-10⊂[2·Pd]6+, together with free guests in solution. (Right) Energy minimized structures (MM3) of the simplified CC complexes. A putative water molecule is bound to cis-10⊂[2·Pd]6+. Double primed labels correspond to the proton signals of the CC complexes (lr = lower rim and ur = upper rim). See Fig. 2a for the proton assignment of bound 24+. I.S. = tert-butanol. *Residual solvent peak.
