Synthesis and crystal structures of [Al(H2O)6](SO4)NO3·2H2O and [Al(H2O)6](SO4)Cl·H2O

Two novel aluminium double salts, [Al(H2O)6](SO4)NO3·2H2O, hexaquaaluminium sulfate nitrate dihydrate, (1), and [Al(H2O)6](SO4)Cl·H2O, hexaquaaluminium sulfate chloride hydrate, (2), were obtained in the form of single crystals. Their crystal structures are each based on an octahedral [Al(H2O)6]3+ unit and both structures have in common one charge-balancing SO4 2− anion. The final positive charge from the aluminium(III) cation is balanced by an NO3 − or a Cl− anion for (1) and (2), respectively. Compound (1) further contains two unligated water molecules while compound (2) only contains one unligated water molecule. In the crystal structures, all components are spatially separated and interactions are mediated via medium–strong hydrogen bonding, compared to many other reported aluminium sulfates where corner-sharing of the building units is common. The two compounds represent rare cases where one aluminium(III) cation is charge-balanced by two different anions.

Homo- and hetero-metallophilicity-driven synthesis of highly emissive and stimuli-responsive Au(I)-Cu(I) double salts

Complex salts composed of cationic Au(I) and anionic Cu(I) species were synthesized by utilizing bis(diphenylarsino)methane (dpam) and bis(diphenylphosphino)methane (dppm) ligands. The discrete tetranuclear complexes were obtained as crystals, and the...

A bug in enantiomer separation: double salt formation – diastereomeric and double salt structures of 1-cyclohexylethylammonium 2- and 4-chloromandelate

The number of crystal structures of diastereomeric salt pairs and especially of double salts is limited in the literature. This work exceptionally presents the structures of two constitutional isomer double...

Physico-chemical study of complexing processes in AlCl3-L-H2O system where L – DPA, centralite, DNT, DBP

This work presents a method of powder components’ interaction, containing a trivalent nitrogen and other atoms with an undivided electron pair (UEP) with the aqueous solutions of complexing extragents. In the role of the latter, an aqueous solution of aluminium chloride was studied. Diphenylamine (DPA), centralite 1 (or diethyldiphenylurea), dinitrotoluene (DNT) and dibutylphthalate (DBP) were considered as organic components. A donor-acceptor mechanism of the reagents’ interaction is proposed, in which a section of a molecule of an organic component of powder, containing an element atom with UEP, acts as a donor of the electron pair; an aluminium ion with free p- and d-orbitals acts as an acceptor. It is the presence of both types of free orbitals that allows Al3+ ion to increase its coordination up to 6 in complex compounds, which it forms. The complex compounds (CCs) of aluminium chloride and powder components with the trivalent nitrogen atom and with other atoms with UEP were obtained in an aqueous medium. CCs were studied by the methods of the physico-chemical analysis such as conductance-measuring and titrimetric methods (complexation and agrentometric titration), chromatographic methods (thin-layer chromatography and gas-liquid chromate-graphy) and spectral methods (IR- and UV-spectrometry). The fragments of functional groups, involving in the formation of the intermolecular bonds such as amino group in DPA molecule, carbonyl group in centralite 1 molecule, nitro group in DNT molecule, ester group in DBP molecule and π-system of aromatic ring in all molecules of the considered organic components of powder, were revealed. It is found that a reason for an increase in a solubility of organic compounds of powder in water is the formation of complex compounds such as “double salts”. The optimal conditions for obtaining CCs such as “double salts” were determined. Later, this fact was applied for an extraction of these components from a powder composition.

Observation of the action of ichthyol in women's practice

The author used ichthyol in 278 cases, using it not only in gynecological cases, but for the treatment of this organism in general, guided by the following pharmacological data: being the double salts of ichthyosulfinic sodium sodium with ammonium, zinc, lithium and containing mainly sulfur, greedily combines with water, what is the effect of reduction and drying; and the ability to irritate tissues less than other drugs has already been proven Unn, They constrict blood vessels, absorb the liquid parts of inflammatory products, (bloodless tissues, and quickly destroy their swelling).

Studying of possibility for breakdown of ilmenite concentrate with ammonium sulphate

The data on investigation of the possibility of breakdown of ilmenite concentrate of the Ariadnensky deposit in Primorsky Krai with ammonium sulfate are presented in the article. For study the ilmenite concentrate and ammonium sulfate interaction, the concentrate and (NH4)2SO4 were mixed based on the formation of sulfates of the main components of the concentrate and then double sulfates of the components of the concentrate and ammonium. The interaction was carried out in glassy carbon crucibles, which were placed in a muffle furnace controller company Nabertherm GmbH (Germany). The weight of sample was 10–40 g. Thermogravimetry, X-ray diffraction and atomic absorption analyses were used in the study. It was found that when the temperature of thermal decomposition of (NH4)2SO4 (3000С) is reached, the interaction of the main components of the concentrate with (NH4)2SO4 begins and proceeds in the temperature range of 300-3600С with the formation of a mixture of double salts well soluble in water - ammonium sulfate and iron compounds (NH4)2Fe2(SO4)3 and NH4Fe(SO4)2 and ammonium sulfate and titanyl of the composition (NH4)2TiO(SO4)2. The interaction at a temperature above 3600С leads to thermal decomposition of the formed double sulfates of ammonium and titanyl and ammonium and iron to sulfates and then oxides. It was shown that water leaching of the product of the interaction of ilmenite concentrate with (NH4)2SO4 at 3600С allows to extract practically all titanium and the bulk of iron to water in the form of well soluble double salts. The conditions for the titanium dioxide separation in the form of anatase from the water leaching solution were found.