Fluxional motion in bis(ethane-1,2-dithiolato)nickel(IV) from nematic-phase proton magnetic resonance

Abstract

We have recorded the nematic-phase ¹H n.m.r. spectrum of bis(ethane-1,2-dithiolato)nickel(IV)(I) at several temperatures. These spectra are consistent only with a fluxional geometry in which the two organic ligands rotate rapidly with respect to one another on the time-scale of the n.m.r. experiment. More than one orientation parameter is required to describe the molecular orientation, implying that this rotation is slow compared to the molecular reorientation time of the liquid crystal.