The title chiral quaternary ammonium salt, C(13)H(25)N(4) (+)·I(-), was synthesized through the Menschutkin reaction between the cage aminal (2S,7S)-1,8,10,12-tetra-aza-tetra-cyclo-[8.3.1.1(8,12).0(2,7)]penta-decane and ethyl iodide. The quaternization occurred regioselectively on the nitrogen with major sp3 character. The crystal structure consists of anions and cations separated by normal dis...

The epoxidation of olefins with tetra n-butylammonium periodate, n-Bu4/NIO4, is catalyzed by six different tetrakis (4-substituted phenyl) porphyrinatomanganese(III) acetate, Mn(T4-XPP)OAc, Complexes in the presence of imidazole as an axial ligand with low to high yields and complete selectivity at room temperature. While the electronic effects of the highly electron-w...

This study aims to investigate the application of two calix[4]arene derivatives named 5,11,17,23-tetra-(t-butyl)-25,26,27,28-tetrahydroxycalix[4]arene (TBCA) and 5,11,17,23-tetra-(t-butyl)-26,27,28-tribenzoyloxycalix[4]arene (TBMTCA) as adsorbents Pb(II) from aqueous solution in a batch system. Adsorption was carried out by varying pH solution, exposure time, concentration. The kinetics evaluat...

In view the of wide scope of structural information of biomolecules in biocompatible ionic liquids (ILs) in various applications including chemical and biochemical, it is essential to study the productive preferential interactions between biological macromolecules and biocompatible ILs. We have therefore explored the stability and activity of α-chymotrypsin (CT) in the presence of five ILs from...

Beneficial effects of ammonium hydroxide was studied, to optimize the ammonium hydroxide concentration for effective tenderization of spent hen meat. Spent hen meat chunks were subjected to ammonium hydroxide treatment (AHT) at different concentrations (0%, 0.1%, 0.5% and 1.0% v/w) and evaluated for different quality parameters after 24 hours. The results indicated a significant increase in pH,...

The title organic salt, 6C(3)H(10)N(+)·C(10)H(2)O(8) (4-)·C(10)H(4)O(8) (2-)·4H(2)O, contains seven independent entities in the asymmetric unit which comprises three propyl-ammonium cations, two water mol-ecules, half a 2,5-dicarb-oxy-benzene-1,4-carboxyl-ate dianion (H(2)btc(2-)) and half a benzene-1,2,4,5-tetra-carboxyl-ate tetra-anion (btc(4-)), the latter two anions being located about cent...

The title compound, [Zn2(C21H25N2)2(OH)2], is a binuclear zinc complex formed by two bidentate β-diketiminate (nacnac) ligands and two μ-hydroxide O atoms, bridging two mononuclear units into a centrosymmetric dimeric unit. Each Zn(2+) cation is coordinated by two N-donor atoms from the nacnac ligand and two O-donor atoms of hydroxide anions to give a distorted tetra-hedral coordination environ...

Ultrasonic velocity (u), density (ρ), viscosity (η) and related acoustical parameters such as adiabatic compressibility (β), free energy (∆G), internal pressure (πi), relaxation time (τ) and acoustic impedance (z) have been computed using standard relation for tetra alkyl ammonium cation (Et4N + , Pr4N + , Bu4N + , and Pen4N + ) in binary liquid mixtures of 1, 4 Dioxane and N, N – Dimethyl Form...

Crystals of the title compound, {(C(6)H(5)C(2)H(4)NH(3))(2)[PbBr(4)]}(n), were grown at room temperature from a solution in N,N-dimethyl-formamide (DMF) using nitro-methane as the poor solvent. This perovskite-type organic-inorganic hybrid compound consists of well ordered sheets of corner-sharing disordered PbBr(6) octa-hedra separated by bilayers of phenethyl-ammonium cations. The octa-hedra ...

The Sn atom in the title compound, [Sn(C(7)H(6)Cl)(3)(C(8)H(14)NO(2)S(2))], is coordinated by three chlorobenzyl ligands and one carboxylate O atom of the substituted acetate ligand in a distorted tetra-hedral environment. Three of the C atoms of the n-butyl group are disordered over two sites with equal occupancies.