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We report an abnormal difference of low-temperature mobility of left-twisted and right-twisted conformations of roto symmetric molecules C6H12N2 (dabco) located in the same positions in crystal Zn2(C8H4O4)2⋅C6H12N2. The difference between (1)H NMR (Nuclear Magnetic Resonance) spin-relaxation data for left-twisted and right-twisted molecules reaches ∼3 × 10(3) times at 8 K and tends to grow at lower temperatures. We argue that taking into account four-component relativistic Dirac wave functions in the vicinity of the nodal plane of dabco molecules and vacuum fluctuations due to virtual particle-antiparticle pairs can explain the changes which C6H12N2 conformations undergo at low temperatures.

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The reaction of one-electron oxidation [Re6Se8(CN)6]4- − [e]- → [Re6Se8(CN)6]3- is studied in liquid solution of the hexanuclear cluster compound (NBu4)4[Re6Se8(CN)6]. The electronic absorption spectra and DFT calculations indicate that the reaction and the final compound (NBu4)3[Re6Se8(CN)6] production may be accomplished through the excited state of paramagnetic hexanuclear chalcocyanide rhenium clusters.