Publications by authors named "Nikita A Selivanov"
Article Synopsis
- Ionogels were created by mixing Aerosil A380 with varying amounts (16.3 to 79.9 mol %) of a specific ionic liquid, 1-methyl-3-octyl-imidazolium tetrafluoroborate (OMIM BF).
- Evidence of changes in the ionic liquid's behavior was observed through NMR and IR spectroscopy, indicating that the liquid was confined within the silica structure, which also affected its decomposition temperature.
- Structural analysis revealed that the ionic liquid filled different pore sizes in the Aerosil, with notable increases in size correlations in higher IL content; this suggests that altering IL concentrations can modulate the material's properties effectively.
Article Synopsis
- A study focused on creating disubstituted carboxonium derivatives of the -decaborate anion [2,6-BHOCCH] was conducted, proposing a method involving the reaction of [BH] with benzoic acid.
- The synthesis occurs through a two-step process, starting with a mono-substituted product, but a quicker one-step method is also suggested.
- The structure of the resulting tetrabutylammonium salts was confirmed using X-ray analysis, and the reaction mechanism was explored with DFT calculations, revealing the importance of intermediate anionic species and the regioselectivity for the 2,6-isomer.
The process of protonation of [2,6-BHOCCH] was investigated both theoretically and experimentally. The most suitable conditions for protonation of the derivative [2,6-BHOCCH] were found. The process of protonation was carried out in the presence of an excess of trifluoromethanesulfonic acid CFSOH at room temperature in dichloromethane solution.
View Article and Find Full Text PDFAs a result of our study on the interaction between the octahydrotriborate anion with nucleophiles (Nu = THF, PhP, PhP-(CH)-PPh (dppe), PhAs, EtN, PhNH, CHN, CHCN, PhCHCN)) in the presence of a wide range of Lewis acids (Ti(IV), Hf(IV), Zr(IV), Al, Cu(I), Zn, Mn(II), Co(II) halides and iodine), a number of substituted derivatives of the octahydrotriborate anion [BHNu] are obtained. It is found that the use of TiCl, AlCl, ZrCl, HfCl, CuCl and iodine leads to the highest product yields. In this case, it is most likely that the reaction proceeds through the formation of an intermediate [BH-HMXn], which was detected by NMR spectroscopy.
View Article and Find Full Text PDFIn the present work, a convenient and straightforward approach to the preparation of borylated amidines based on the -dodecaborate anion [BHNCCHNHR]-, R=H, Alk, Ar was developed. This method has two stages. A nitrile derivative of the general form [BHNCCH] was obtained, using a modified technique, in the first stage.
View Article and Find Full Text PDFThe interaction of hafnium(IV) salts (oxide-dichloride, chloride, and bromide) with nitrilotriacetic acid (NTA), diethylenetriamminepentaacetic acid (DTPA), 1,2-diaminocyclohexanetetraacetic acid (CDTA), 1,3-dipropylmino-2-hydroxy ,,','-tetraacetic acid (dpta), and -(2-hydroxyethyl)ethylenediamine triacetic acid (HEDTA) has been studied. The corresponding complexes Na[Hf(NTA)]·3HO (), Na[HfDTPA]·3HO (), [HfCDTA(HO)] (), and Na[Hf(dpta)]·7.5HO·0.
View Article and Find Full Text PDFThe novel members of the 1,2-diboraoxazoles family have been obtained. In the present work, we have carried out the intramolecular ring-closure reaction of borylated iminols of general type [BHN=C(OH)R] (R = Me, Et, Pr, Pr, Bu, Ph, 4-Cl-Ph). This process is conducted in mild conditions with 83-87% yields.
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