A single-molecular twin rotor: correlated motion of two pyrimidine rings coordinated to copper
2015
We describe the two correlated rotational motions of pyrimidine rings in 4,4′-dimethyl-2,2′-bipyrimidine ligated to Cu(I). The two pyrimidine rings delimited by anthryl and phenanthroline groups rotate to afford three isomers. 1H NMR measurements revealed that the two rotational processes were activated at different temperatures. Cyclic voltammetry gave the kinetic and thermodynamic parameters that provide clear evidence of the correlation between the two rotational steps.
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