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Specific features of the structure of the synthesized inclusion complex of 4-acetoxy-1-(2ethoxyethyl)-4-phenylpiperidine with β-cyclodextrin were considered. The composition (1: 2) and structure of the obtained complex were confirmed by NMR spectroscopy, thermal analysis, and quantum chemical calculations. [ABSTRACT FROM AUTHOR]

The forms and structure of comenic acid and its salts with Na and Li in solution and solid state are studied by multinuclear NMR spectroscopy. The formation of dimeric structures of comenic acid in the solid state is shown. It is found that disubstituted sodium and lithium salts have different structures. [ABSTRACT FROM AUTHOR]

By alkylation of acetylacetone in anhydrous methanol 3-tetradecylpentane-2,4-dione was prepared. Its individuality and structure were confirmed by IR and NMR spectroscopy and mass-spectrometry. Compression isotherms of the Lengmuir monolayers on water subphase surface depending on the tautomeric form of 3-tetradecylpentane-2,4-dione were studied. [ABSTRACT FROM AUTHOR]

Complex formation of propionic acid with ions of rare-earth metals of the yttrium subgroup (D2O, 5.0 M NaNO3) in the absence and presence of diamagnetic Mg2+ cations was studied by 1H NMR spectroscopy in combination with mathematic simulation of complicated equilibria. Stability constants for monopropionate complexes of rare-earth ions decrease when the rare-earth cation and Mg2+ are present in the system together. [ABSTRACT FROM AUTHOR]

Complexation of acetic acid in 5.0 M NaNO3 at 298 K with yttrium-group rare-earth ions (Dy3+, Er3+, Tm3+, Yb3+) in the absence and in the presence of Mg2+ ions was studied by 1H NMR spectroscopy in combination with mathematical simulation of complex equilibria. In the presence of Mg2+, the stability constants of monoacetate complexes of rare-earth ions decrease relative to the Mg-free systems. [ABSTRACT FROM AUTHOR]

The structure of the formic acid$-$water system was studied by proton spin$-$spin relaxation at 298 K. The simplest compositions of the heterosolvates were determined. [ABSTRACT FROM AUTHOR]