The electric-field-induced reorientation of (S)-4-methylhexyl 4-[4-(decyloxy) phenylethynyl]-2-fluorobenzate in the Sc* phase was investigated by using an asynchronous time-resolved FT-IR technique. The band assignments were made on the basis of the polarized FT-IR spectra and FT-Raman spectrum. The time-resolved study indicates that the reorientation occurs immediately after the electric field is applied. The molecule reorients as a unit; however the rigid core of the molecule seems to be more mobile than the hydrocarbon chains and needs a shorter period of time for the reorientation. The change of orientation is not completely finished in a 500-μs time period. Of particular note is the behavior of the carbonyl band; this band, usually strong in infrared spectra, is very weak in the time-resolved spectra.
Synthesis of diruthenium tetrahydrido complexes 1 with substituted cyclopentadienyls from readily available ruthenium η3-allyl complexes 3 has been attained by LiEt3BH-mediated reaction followed by conventional protonolysis. Complexes 1d and 1e having 1,2,4-tri- and 1,3-di-tert-butylated cyclopentadienyls obtained by this protocol have sufficient thermal stability in addition to the significant lability of the Ru–H bonds.
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