A series of di-orthometallated triphenyl phosphite iridium(III) complexes [Ir(tdbpit)(bpy)Cl (1), Ir(tdbpit)(dbbpy)Cl (2), Ir(tdbpit)(sb)Cl (3) (tdbpitH2 = tris (2,4-di-tert-butylphenyl) phosphite, bpy = 2,2′-bipyridine, dbbpy = 4,4′-diterbutyl-2,2′-bipyridine, sb = 4,5-diaza-9,9′-spirobiflu...

The reaction of the quadruply bonded dirhenium(III) complex Re2(μ-O2CCH3)4Cl2 (1) with 1,2,3-triphenylguanidine (abbreviated as HTPG) affords the ionic compounds [H2TPG][ReO4] (2) and [Re2(μ-TPG)3(μ-O2CCH3)Cl]Cl (3), depending upon the water content of the solvent used in the reaction. Cleava...

Triisobutylaluminium has been shown to be a commercial reagent of choice for achieving regioselective mono-O-debenzylation of a variety of perbenzylated mono- and disaccharides.

It was shown that hexamethylenetetramine (HMT) is a new effective fuel for single-step solutions combustion synthesis (SCS) of supported Ni catalysts for methane decomposition into hydrogen and nanofibrous carbon. Several generalized chemical equations reflecting different ideas about combustion...

Based on the identified inconsistencies in the existing literature data on the enthalpies and heat capacities of dissolution (solvation) of hexamethylenetetramine (HMTA) in ordinary (H2O) and heavy (D2O) water, we carried out carefully the calorimetric study of these two binary systems at seven ...

A series of hexamethylenetetramine-based ionic liquid crystals (ILCs) containing cholesterol derivatives and different anions including Br−1, BF4−1, PF6−1, H2PO4−, CF3COO−, TsO−, and CSA-SO3- were synthesized, and the characterization, possible applications and self-assembly behavior were discus...

Hexamethylenetetramine (HMTA) was used to modify the raw Chinese lacquer and the film was characterized by using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results show that the property of the Chinese lacquer fil...

Benzalkonium chloride (BAK) can be readily concentrated prior to chromatographic analysis by the addition of appropriate amounts of sodium chloride and acetonitrile to the sample. This affords a two-phase system the upper of which contains the BAK and which can be directly injected onto the chro...

Nine R2R2′N+Cl− (R=benzyl, 2-methylbenzyl, 3-methylbenzyl, 4-methylbenzyl, 2-phenylethyl or 3-phenylpropyl; R′=ethyl or methyl) quaternary dialkyldiaralkylammonium chlorides were synthesized by treating dimethylformamide or diethylformamide with non-substituted or substituted arylalkyl (aralky...

The rate of uptake of the lipophilic cation dibenzyldimethylammonium by yeast cells is increased by tetraphenylboron. However, tetraphenylboron increases also the equilibrium partition of dibenzyldimethylammonium between cells and medium, probably because a complex between tetraphenylboron and d...

The distribution ratio of the lipophilic cation dibenzyldimethylammonium between the cells of Saccharomyces cerevisiae and the medium appears to reflect changes in the membrane potential in a way that is qualitatively correct: the addition of a proton conductor or of an agent which blocks metabo...

Dibenzyldimethylammonium cations containing one fluorine atom in ortho, meta or para position of both aromatic rings have been used as structure directing agents for the synthesis of AFI-type materials. The presence of fluorine improves the templating ability of the molecule, as compared with th...

Solutions of some quaternary ammonium fluoride hydrates in dimethyl sulfoxide (DMSO) are efficient solvents for the dissolution and derivatization of cellulose. Examples are the hydrated fluorides of the following quaternary ammonium ions: dibenzyldimethyl- (BMAF-0.1H2O), tetraallyl- (TAAF-H2O),...

Bis[dibenzyldimethylammonium]CuBr4, bis[dibenzyldimethylammonium]CuCl4 and bis[dimethyldi(2-phenylethyl)ammonium]CuBr4 were crystallized from acetonitrile and/or dilute HX solutions. Five different kinds of single crystals were obtained. In the case of bis[dibenzyldimethylammonium]CuX4 (X=Br or ...

Several all-silica zeolite phases have been obtained by using Dibenzyldimethylammonium cation (DBDM) as structure directing agent in fluoride media. Zeolite Beta and Beta-like materials were obtained at high DBDM content, whereas EU-1 related materials crystallize for lower concentration of this...

A novel electrolyte, dibenzyldimethylammonium fluoride has been obtained essentially anhydrous (BMAF-0.1H2O) by a simple route. Its thermal stability, relative to tetra(1-butyl)ammonium fluoride trihydrate (TBAF3H2O) has been demonstrated by thermogravimetric analysis. DMSO solution of (BMAF-0.1...

In this study, aqueous solutions at different molar concentrations of sodium cyclamate in water were completely characterized by HATR (Horizontal Attenuated Total Reflectance) and Raman spectroscopies. The theoretical structures of cyclamate ion, the zwitterionic and neutral forms of the cyclami...

Acid and oxidative doping pathways have been employed in synergy to synthesize polyaniline-gold (PANI-Au) nanocomposites using appropriate reagents and optimized synthesis procedures. Sulphuric and p-toluene sulphonic acids (pTSA) were used as protonic acid dopants and chloroauric acid as an oxi...

Assignment of relative configurations to the diastereomeric racemates (1R2R, 1S2S) and (1R2S, 1S2R) of 1-mesityl-2-methyl-3-phenyl-1-propanol was carried out, by studing the chemical shifts induced by Eu(fod)3 an the signal of the Me group in position 2, taking into account a prior estimate of t...

SummarySynthetic chemists often exploit the high enantioselectivity of lipases to prepare pure enantiomers of primary alcohols, but the molecular basis for this enantioselectivity is unknown. The crystal structures of two phosphonate transition-state analogs bound to Burkholderia cepacia lipase ...