The thiosulfinyl group serves as a stereogenic center and shows diamagnetic anisotropy similar to that of the sulfinyl group

The pseudotetrahedral geometry of the thiosulfinyl group (>S=S) in the thionosulfite which was prepared by treatment of cis-3,4-di-tert-butylthiolane-3,4-diol with 1,1'-thiobisbenzimidazole is stable enough to allow the isolation of two diastereomers. X-ray crystallographic analysis revealed that the configuration of the >S=S group of the major diastereomer (45% isolated yield) is syn to the thiolane ring, while that of the minor diastereomer (10% isolated yield) is anti to the thiolane ring. 1H NMR spectrum analysis clarified that the shielding and deshielding zones of the >S=S group are similar to those of the >S=O group. Chemical properties of the >S=S group toward thermolysis, hydrolysis, and oxidation were clarified. The absorptions or bands in the UV/vis, IR, and Raman spectra, which originate from the >S=S group, were assigned on the basis of the B3LYP/6-31G* level calculations.     

Neutron activation analysis of altered oceanic tholeiite: Variation of lanthanide concentrations with degree of alteration

Lanthanides in altered oceanic tholeiite were determined by means of instrumental neutron activation analysis. Potassium content was employed as a measure of degree of alteration. Lanthanide concentrations in moderately altered parts of tholeiite (K₂O content below 1%) were identical with those in'unaltered parts while light lanthanide concentrations in more altered parts (K₂O content above 1%) increased with degree of alteration.     

Raman scattering in one-dimensional ionic conductors Rb-priderites

Raman spectra of single crystals of RbAl and RbMg-priderites, which are known to be one-dimensional ionic conductors, have been measured and analyzed. In addition to the spectra due mainly to the vibrations of Ti(Al)-O or Ti(Mg)-O frameworks observed in the frequency region above 100 cm^?1, the Raman bands, which can be assigned to the vibration modes of Rb⁺ ions, have been observed in the frequency region below 100 cm^?1. Raman spectra of the solid solutions (Rb, K)-Al priderites have also been studied.