A. Rayes

Synthesis and crystal sructure of a new dihydrogenomonophosphate (4-C2H5C6H4NH3)H2PO4

Chemical preparation, crystal structure, calorimetric, and spectroscopic investigations are given for a new organic-cation dihydrogenomonophosphate, (4-C{sub 2}H{sub 5}C{sub 6}H{sub 4}NH{sub 3})H{sub 2}PO{sub 4} in the solid state. This compound crystallizes in the orthorhombic space group Pbca with the following unit cell parameters: a=8.286(3) A, b=9.660(2) A, c=24.876(4) A, Z=8, V=1991.2(7) A{sup 3}, and D{sub X}=1.442 g cm{sup -3}. Crystal structure was solved with a final R=0.054 for 3305 independent reflections. The atomic arrangement coaled described as H{sub 2}PO{sub 4}{sup -} layers between which are located the 4-ethylanilinium cations.

TiO 2 –PANI/Cork composite: A new floating photocatalyst for the treatment of organic pollutants under sunlight irradiation

A novel photocatalyst based on TiO2-PANI composite supported on small pieces of cork has been reported. It was prepared by simple impregnation method of the polyaniline (PANI)-modified TiO2 on cork. The TiO2-PANI/Cork catalyst shows the unique feature of floating on the water surface. The as-synthesized catalyst was characterized by X-ray diffraction (XRD), scanning electron micrograph (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), UV-vis diffuse reflectance spectra (UV-vis DRS) and the Brunauer-Emmett-Teller (BET) surface area analysis. Characterization suggested the formation of anatase highly dispersed on the cork surface. The prepared floating photocatalyst showed high efficiency for the degradation of methyl orange dye and other organic pollutants under solar irradiation and constrained conditions, i.e., no-stirring and no-oxygenation. The TiO2-PANI/Cork floating photocatalyst can be reused for at least four consecutive times without significant decrease of the degradation efficiency.

Synthesis and structure determination of a piperidinium Zn(HPO4)ClC5H12N

Abstract This article deals with the synthesis and X-ray structure determination of a new bidimentional zincophosphate (ZnPO) with formula Zn(HPO 4 )ClC 5 H 12 N. This phase crystallizes in the orthorhombic space group Pbca (No. 61) with parameters: a = 8.767(2) A; b = 24.678(7) A; c = 9.322(2) A; V = 2016.8(1) A 3 ; Z = 8. Structure of this compound is determined: R = 0.026; R W = 0.033 and characterized with IR, TGA/DSC, and NMR. The structure consists of anionic parallel [Zn(HPO 4 )Cl] − sheets alternating with thick slabs of organic molecules (C 5 H 12 N) + . The organic molecules are linked to the anionic sheets through hydrogen bonds.

Crystal structure of non-centrosymmetric bis­(4-meth­oxy­benzyl­ammonium) tetra­chlorido­zincate

The crystal structure of the new non-centrosymmetric organic–inorganic hybrid salt (C8H12NO)2[ZnCl4], consists of 4-methoxybenzylammonium cations sandwiched between tetrachloridozincate anionic layers running parallel to the ac plane.

Synthesis and Characterization of Two New Compounds: N(C2H4NH3)3(H2TO4)(HTO4)·2H2O (T = P, As)

The synthesis and structures of two new compounds with the general formula N(C2H4NH3)3(H2TO4)(HTO4)·2H2O (T = P, As) are reported. They crystallize with triclinic unit cells and are isotropic. We determined the structure of phosphate salt. The following unit cell parameters were found: a = 9.886(4), b = 9.308(2), c = 10.140(3) Å, α = 109.38(2), β = 108.83(3), γ = 74.40(3)°, V = 819.2(5) Å3, and ρcal. = 1.537 g · cm−3. The crystal structure was solved with a final R = 0.042 for 3748 with I > 3σ I). The space group is P-1 and Z = 2. The atomic arrangement can be described as a three-dimensional network of hydrogen bonds made up from HnPO4 3−n (n = 1, 2) anions and H 2 O molecules between which are trapped the tris(2-ammoniumethyl)amine cations. Solid-state 13C and 31P MAS-NMR spectroscopies are in agreement with X-ray structure. Ab initio calculations allow the attribution of the phosphorus signals to the independent crystallographic sites.

Synthesis and Characterization of a New Chlorozincophosphate [H3N(CH2)2NH3]0.5Zn(HPO4)Cl

Abstract A new zincophosphate [H3N(CH2)2NH3]0.5Zn(HPO4)Cl, was obtained at room temperature from a starting mixture of ZnCl2, H3PO4, H2O, and ethylene-diamine. Its unit cell is tricline P-1 (No. 2) with parameters a = 7.709(2) Åi, b = 8.479(2) Åi, c = 5.175(2) Åi, α = 104.99(3), β = 107.41(4), γ = 87.34(2)°, Z = 2, and V = 311.6(2) Åi3. Its structure is resolved to R = 0.024, Rw = 0.037. The backbone of the title compound is a linear heteroanion built by PO4 and ZnO3Cl tetrahedra assembled to form four member rings themselves interconnected by sharing common oxygen atoms. Hydrogen bonds O─ H═ O established between these chains connect them as to build infinite planes. The organic entities, located between these planes form the 3D cohesion through N─ H═ O or N─ H═ Cl hydrogen bonds.

Synthesis and crystal structure of 4-(2-ammonio­eth­yl)morpholin-4-ium di­chlorido­diiodido­cadmate/chlorido­tri­iodido­cadmate (0.90/0.10)

The crystal structure of a new inorganic–organic hybrid material, (C6H16N2O)[CdCl1.90I2.10], consists of 4-(2-ammonioethyl)morpholin-4-ium cations and dichloridodiiodidocadmate/chloridotriiodidocadmate (0.90/0.10) anions connected by hydrogen bonds into a three-dimensional network.

Synthesis and crystal structure of 4-fluoro­benzyl­ammonium di­hydrogen phosphate, [FC6H4CH2NH3]H2PO4

The crystal structure of 4-fluorobenzylammonium dihydrogen phosphate, [FC6H4CH2NH3]H2PO4, consists of layers of 4-fluorobenzylammonium cations and dihydrogen phosphate anions that alternate along the c axis, connected by hydrogen bonds into a three-dimensional network.

Crystal structure of 5-chloro-2-methylanilinium chloride hydrate, (ClC7H6NH3)Cl . H2O

H(l) 2a 0.0412 0.4851 0.1320 0.059 H(2) 2a 0.1675 0.3395 0.1240 0.059 H(3) 2a 0.2294 0.5261 0.1345 0.059 H(7) 2a 0.5339 0.3477 0.6358 0.057 H(8) 2a 0.3123 0.3899 0.7725 0.059 H(9) 2a -0.0504 0.4937 0.3624 0.048 H(4) 2a 0.4851 0.2833 0.2425 0.074 H(5) 2a 0.6324 0.3128 0.4009 0.074 H(6) 2a 0.5596 0.4780 0.2912 0.074 H(10) 2a -0.4659 0.1646 0.9596 0.098 H(ll) 2a -0.3295 0.2956 0.9651 0.098