1-Methylsalsolinol 1, dopamine 2, quercetin 3, isorhamnetin 4 and quercetin 3-O-robinobioside 5 were isolated for the first time from ethanolic extract of Hammada scoparia (Pomel) Iljin. The complete NMR analysis of compound 1 was reported. The scavenging activity of the pure compounds 1-5 against DPPH (2, 2-diphenyl-1- picrylhydrazyl) was investigated. Results showed that quercetin, 1-methylsalsolinol and dopamine presented a potent antiradical activity in comparison with ascorbic and caffeic acids. The chemical composition of hexanic extract obtained from the leaves of this plant, was analysed by GC-MS. This analysis led to the identification of 35 constituents.
R. Jarraya, H. Ben Salah, M. Damak
Hammada scoparia, Chenopodiaceae, alkaloids, flavonoids, antiradical activity
Pages 261-266
The complex [Cu(C8H15N)4](C8H16N)2(SO4)2.4H2O has been prepared in ethanol solution at room temperature. It has been characterized by scan electronic microscopy and infrared spectroscopy. The structure was determined by single crystal X-ray diffraction. The cell is triclinic P-1, a=6.920(3)Å, b=12.349(4)Å, c=18.326(4)Å, α=106.42(2)°, β=99.38(3)°, γ=90.58(4)° and Z=1. The structure is composed of complex molecules [Cu(C8H15N)4]2+, C8H16N+ ions, sulfate groups and water free molecules. The copper(II) ion has a square plane environment.
L. Cherif, F. Ben Amor, A. Driss, T. Jouini
structure, complex, copper(II)
Pages 267 - 276
The compound C17H20N2O5 cristallizes in the trigonal system, P3121 space group. The cell contains Z=6 fomular groups and its parameters are: a=10.207(3) Å, c=28.75(1) Å and γ=120°. The molecular structure could not be determined by NMR 1H and 13C spectroscopic methods but was determined by X-Rays diffraction. It is built up a γ-lactam group linked to methylfuran, N-furanomethylamide and 2-hydroxyethyl groups. The lactarnic ring and the two furanic rings are not coplanar.
F. Beji, F. Ben Amor, H. Amri, A. Driss
γ-Lactam, methylfuran, N-furanomethylamide, molecular structure
Pages 277 - 283
The iron phosphate Fe(H2PO4)3 cristallizes in the hexagonal system of space group R-3c. The cell parameters are: a=8.075(3) Å, c=25.606(7) Å and Z=6. The structure is built up FeO6 octahedra and PO4 tetrahedra linked by Fe-O-P bridges forming layers parallel to (-I 0 2) direction. Each layer can be described as formed by SBU-8 rings. The layers are also linked by Fe-O-P bridges forming a three dimensional framework.
N. Belfguira, F. Ben Amor, T. Jouini, A. Driss, M. Abdrrabba
iron phosphate, structure, SBU-8
Pages 285 - 292