Fig. 4: Interaction of L2Ni2 metallomacrocycle with the G1•PF6 axle. | Communications Chemistry

Fig. 4: Interaction of L2Ni2 metallomacrocycle with the G1•PF6 axle.

From: Non-threaded and rotaxane-type threaded wheel–axle assemblies consisting of dinickel(II) metallomacrocycle and dibenzylammonium axle

Fig. 4

a 1H NMR spectra of non-threaded and threaded wheel–axle assemblies of L2Ni2 and G1•PF6 (400 MHz, CDCl3/CD3CN (4:1)). (i–iv) Spectral changes of L2Ni2 upon the addition of G1•PF6 (i, 0 equiv, ii, 0.5 equiv, iii, 1.0 equiv, iv, 2.0 equiv) indicative of the formation of the non-threaded assembly, nthr-L2Ni2•G1•PF6; (v) isolated rotaxane-type threaded assembly, rot-L2Ni2•G1•PF6; (vi) nthr-L2Ni2•G1•PF6 in the presence of CsOTf (2 equiv); (vii) rot-L2Ni2•G1•PF6 in the presence of CsOTf (2 equiv); (viii) uncomplexed G1•PF6. b Formation of nthr-L2Ni2•G1•PF6 from L2Ni2 and G1•PF6 (metal-first method). The 1H NMR signal assignments of nthr- and rot-L2Ni2•G1•PF6 are also shown.

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