New complex compounds[(2-clpy) 2 Pd(OOCMe) 2 ] ( I ), [{(Ph)Pd(2-clpy)} 2 (OOCMe) 4 Pd]·3C 6 H 6 ( II ), and [{(Ph)Pd(2-clpy)} 2 (OOCMe) 4 Pd] ( III ) are obtained in the interaction of palladium acetate [Pd 3 (OOCMe) 6 ] with 2-chloropyridine (2-clpy) and structurally characterized by single crystal X-ray diffraction. It is found that in the inert medium, mononuclear compound I forms and it can be isolated in the crystalline state, while trinuclear complexes II and III are the products of benzene metalation with palladium under mild conditions.

The interaction of chitosan with 3-(chloromethyl)-[1,2,4]selendiazole[4,5-a]pyridin-4 bromide results in water-soluble, selenium-containing, cationic chitosan derivatives. Derivatives of chitosan with degrees of substitution of 0.15, 0.45, and 0.65 were obtained. These derivatives are characterized by a pronounced in vitro antibacterial activity against Staphylococcus aureus and Escherichia coli , and the antibacterial activity of the derivatives increases with an increase in their degree of substitution. The antibacterial activity of the highly substituted derivative is comparable to that of the conventional antibiotics ampicillin and gentamicin.

Effect of the chemical composition and crystal structure type of gadolinium complex oxides on their catalytic activity is studied. It is shown that nanocrystalline powders Gd 2 Ti 2 O 7 , Gd 2 Zr 2 O 7 , and Gd 2 Hf 2 O 7 form highly symmetrical face-centered сubic crystal structures having localized (in Gd 2 Ti 2 O 7 ) and delocalized (in Gd 2 Zr 2 O 7 and Gd 2 Hf 2 O 7 ) oxygen vacancies. At the same time, low-symmetrical crystal structures are formed in Gd 2 (WO 4 ) 3 (the monoclinic structure) and Gd 2 (МоO 4 ) 3 (a mixture of monoclinic and rhombic structures). Catalytic runs show that formation of the cubic structure contributes to an increase in the degree of conversion of propane and causes a shift in cracking temperatures to lower values. Formation of this type of nanocrystalline oxides facilitates the dehydrogenation reaction with propylene selectivity up to 80% at temperatures up to 700 К. Formation of the mixture of monoclinic and rhombic structures in Gd 2 (МоO 4 ) 3 leads to a shift in the degree of conversion to the catalytic temperature range of 700–900 К, in which the dehydrogenation reaction predominates (80%). In the case of the monoclinic structure of Gd 2 (WO 4 ) 3 in the same cracking temperature ranges the process of degradation occurs in parallel; this decreases propylene selectivity to 50% and promotes an increase in the yield of ethylene to 30%.

A method is developed for creating highly active and selective catalysts for associated petroleum gas cracking which is based on use of activated carbons derived from renewable sources of plant raw materials (Jerusalem artichoke, false flax, rape, wheat) modified with nanosized iron particles obtained in reverse-micellar solutions. It is shown that carbon matrices modified with iron nanoparticles possess а high catalytic activity with the maximum conversion attained at 900 К and a high selectivity for olefin formation (about 95%).

Salt Na 2 [OsCl 6 ] is obtained by the interaction of H 2 [OsCl 6 ]·H 2 O with NaCl in boiling concentrated hydrochloric acid. According to the single crystal X-ray diffraction data, the substance crystallizes in the cubic system, space group Fm 3̄ m, a = 9.7461(11) Å, V= 925.8(3) Å 3 , Z = 4, R 1 = 0.029, wR 2 = 0.070. The compound is characterized by UV-vis and IR spectroscopy.

Salt Na2[OsCl6] is obtained by the interaction of H2[OsCl6]·H2O with NaCl in boiling concentrated hydrochloric acid. According to the single crystal X-ray diffraction data, the substance crystallizes in the cubic system, space group Fm3̄m, a = 9.7461(11) Å, V= 925.8(3) Å3, Z = 4, R1= 0.029, wR2 = 0.070. The compound is characterized by UV-vis and IR spectroscopy.