Kinetic, isotherm and mechanism investigations of the removal of phenols from water by raw and calcined clays.

In this work, the phenols removal of phenol from water by raw clay (RCG) and calcined one at 1000 °C (CCG) of Goulmima city (Morocco) was investigated. The kinetics and isotherms experiments were also studied at pH = 4. The results indicated that the phenol adsorption reached equilibrium within 3 h, and the removal of phenol was enhanced at the same temperature by CCG (2.

(3R*,6R*,4'S*,8'R*,3''R*,6''R*)-3,3''-Diisopropyl-6,6''-dimethyl-2',6'-di-phenyl-dispiro-[cyclo-hexane-1,4'-(3,7-dioxa-2,6-di-aza-bicyclo-[3.3.0]octa-ne)-8',1''-cyclo-hexa-ne]-2,2''-dione.

The two oxazolidine rings (A and B) of the title compound, C34H44N2O4, display roughly half-chair conformations, which could be described as twisted on the C-O bond. Together, the fused oxazolidine rings have a butterfly shape, with the H atoms attached to the ring junction C atoms in a cis orientation. The cyclo-hexane rings of both p-menthone fragments display chair conformations.

2,2'-Dimethyl-5,5'-dipropan-2-yl-4,4'-(phenyl-methyl-ene)diphenol.

In the title mol-ecule, C(27)H(32)O(2), the aromatic rings are in a propeller configuration. In the crystal, mol-ecules are linked through O-H⋯O hydrogen bonds forming a two-dimensional network which develops parallel to (010). Futhermore, weak C-H⋯π inter-actions involving the two substituted rings build up a three-dimensional network.

Penta-ammonium hepta-sodium bis-[penta-kis(μ(2)-oxido)deca-oxido-bis-(μ(5)-phosphato)penta-molybdenum(VI)] henicosa-hydrate.

The title compound, (NH(4))(5)Na(7)[Mo(5)P(2)O(23)](2)·21H(2)O, was prepared under atmospheric conditions in aqueous solution at room temperature. The structure contains the [Mo(5)P(2)O(23)](6-) heteropolyoxometallate anion, which has been previously reported a number of times with a variety of differing counter-cations. Each anion is built up of five MoO(6) octa-hedra sharing an edge and forming a ring which is closed by common corners of the terminal octa-hedra.

Disordered LiZnVO(4) with a phenacite structure.

Single crystals of lithium zinc vanadate, LiZnVO(4), were grown by the flux method. The structural type of this vanadate is characterized by a three-dimensional arrangement of tetra-hedra sharing apices in an LiZnVO(4) network. This arrangement contains three different tetra-hedra, namely one [VO(4)] and two disordered mixed-site [Li/ZnO(4)] tetra-hedra.

4-Benzyl-6-p-tolyl-pyridazin-3(2H)-one.

The title compound, C(18)H(16)N(2)O, is a new dihydro-pyridazin-3(2H)-one derivative synthesized in one step by condensation of α-benzyl-idene-γ-tolyl-butenolide with hydrazine. The mol-ecule is not planar; the tolyl and pyridazine rings are twisted with respect to each other making a dihedral angle of 27.35 (9)° and the benzyl ring is nearly perpendicular to the pyridazine ring with a dihedral angle of 85.

1',3',3'-Trimethyl-2,3-diphenyl-2,3-di-hydro-isoxazole-5(4H)-spiro-2'-indoline.

Two diastereoisomers of the title compound, C(25)H(26)N(2)O, have been prepared by cyclo-addition between 1,3,3-trimethyl-2-methyl-eneindoline and C-phenyl-N-phenyl-nitrone. The stereochemistry of the major diastereoisomer, viz. S,R/R,S, is confirmed by the X-ray analysis.