New vinylgermanium cubic derivatives of silsesquioxanes (i.e., monovinylhepta(alkyl, phenyl)-germasilsesqiuoxanes and (dimethylvinylgermoxy)-heptaisobutylsilsesquioxanes) were synthesized and characterized by spectroscopic methods. The first ruthenium− germasilsesquioxyl complexes were also prepared via stoichiometric reaction of RuHCl(CO)(PPh 3 ) 3 with the abovementioned vinylgermanium derivatives of silsesquioxanes, and their structures were determined by spectroscopic and X-ray analyses. The initial ruthenium complex as well as the above-mentioned Ge−Ru complexes were tested as catalysts, in the germylative coupling with olefins, and proved to be active in the case of (dimethylvinyl)-germoxyheptaisobutylsilsesquioxane but showed no activity toward vinylgermasilsesquioxanes. A general mechanism for the germylative coupling of the two vinylgermanium derivatives of silsesquioxanes is presented.

Comprehensive studies on platinum-catalyzed hydrosilylation of a wide range of terminal and internal alkynes with spherosilicate (HSiMe O) Si O (1 a) were performed. The influence of the reaction parameters and the types of reagents and catalysts on the efficiency of the process, which enabled the creation of a versatile and selective method to synthesize olefin octafunctionalized octaspherosilicates, was studied in detail. Within this work, twenty novel 1,2-(E)-disubstituted and 1,1,2-(E)-trisubstituted alkenyl-octaspherosilicates (3 a-m, 6 n-t) were selectively obtained with high yields, and fully characterized ( H, C, Si NMR, FTIR, MALDI TOF or TOF MS ES analysis). Moreover, the molecular structure of the compound (Me Si(H)C=C(H)SiMe O) Si O (3 a) was determined by X-ray crystallography for the first time. The developed procedures are the first that allow selective hydrosilylation of terminal silyl, germyl, aryl, and alkyl alkynes with 1 a, as well as the direct introduction of sixteen functional groups into the 1 a structure by the hydrosilylation of internal alkynes. This method constituted a powerful tool for the synthesis of hyperbranched compounds with a Si-O based cubic core. The resulting products, owing to their unique structure and physicochemical properties, are considered novel, multifunctional, hybrid, and nanometric building blocks, intended for the synthesis of star-shaped molecules or macromolecules, as well as nanofillers and polymer modifiers. In the presented syntheses, commercially available reagents and catalysts were used, so these methods can be easily repeated, rapidly scaled up, and widely applied.

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High-resolution diffraction data have been used for modeling the electron density distribution in the crystal structure of 4-[[4-(methoxy)-3-quinolinyl]­thio]-3-thiomethylquinoline. The results confirm the presence of intermolecular, electron pairs−σ-holes S···S bonding. The calculated minimum energy distance is 3.33–3.34 Å and agrees very well with the separation of 3.3300(11) Å, observed in the crystal structure. A large spectrum of weak interactions, including C–H···O, C–H···S, and π···π has been analyzed by means of electron density distribution details and Atoms-In-Molecules approach. There is apparently a good agreement between the results obtained with the multipolar Hansen-Coppens model and theoretical study. At the same time, comparison with the results of the best independent atom model has revealed its deficiencies.

Organic compounds designed to serve as stable dendrimer cores were developed. A series of aminosugar and amino polyol containing G0 dendrimers were synthesized. The reaction mixture composition was checked by MALDI TOF mass spectrometry, while that of purified products – by 1H and 13C NMR combined with 2D NMR spectroscopy as well as MALDI TOF MSMS mass spectra. Mass spectrometric fragmentation experiments were performed in positive ion mode in order to determine common fragmentation patterns of [M+H]+ ions.