Zobrazeno 1 - 10
of 25
pro vyhledávání: '"SHAKER L. STEFAN"'
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 115:399-408
A tridentate ONS donor ligand, HL, was synthesized by the condensation of 2-aminochromone-3-carboxaldehyde with thiosemicarbazide. The structure of the ligand was elucidated by elemental analyses, IR, 1H and 13C NMR, electronic and mass spectra. Reac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fb5cf521acadeff49b2e70345d3a192
https://doi.org/10.1016/j.saa.2013.06.075
https://doi.org/10.1016/j.saa.2013.06.075
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 31:927-951
Schiff base complexes known as complex ligands were prepared by the condensation of dichlorobis(1,2-diaminopropane)nickel(II), [Ni(1,2-pn)2Cl2]·H2O, or bis(1,2-diaminopropane)copper(II) sulphate, [Cu(1,2-pn)2]SO4·H2O, with salicylaldehyde producing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f7c3e7b69f7088f73792846e1d4218a
https://doi.org/10.1081/sim-100105251
https://doi.org/10.1081/sim-100105251
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 31:895-915
Two novel symmetrical Schiff base ligands, H2L1 and H2L2, with tetradentate N2O2 and pentadentate N3O2 coordinating sites were prepared by the reaction of the aldehyde 2-methyl-7-formyl-8-hydroxy-quinoline with 1,3-diaminopropane or diethylenetriamin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::597130521f0d1cfb1a6f13993e732ac2
https://doi.org/10.1081/sim-100104858
https://doi.org/10.1081/sim-100104858
Autor:
Shaker L. Stefan, Moheb F. Ishak
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 24:845-853
The interactions of oxotitanium(IV) and oxovanadium(IV) with arylbis (5-hydroxy-3-methyl-1-phenyl-4-pyrazolyl)methane (ArBPyM) ligands containing enolic oxygen donors, have been studied with ir spectroscopy, thermogravi-metric measurements and elemen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4991efdf0b8cbb27644e18a0121e8b8
https://doi.org/10.1080/00945719408001305
https://doi.org/10.1080/00945719408001305
Publikováno v:
Thermochimica Acta. 236:149-164
The thermodynamic parameters of complexes of UO2(II) and Th(IV) cations with arylbis(5-hydroxy-3-methyl-1-phenylpyrazol-4-yl) methanes and other derivatives have been measured in 75% (v/v) methanol-water and 0.10 M KNO3 using potentiometry. Compariso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33dd12859569f4989bf4fc78c18e575e
https://doi.org/10.1016/0040-6031(94)80264-5
https://doi.org/10.1016/0040-6031(94)80264-5
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 24:291-299
A new series of double-metal aroxocobaltate(II) tetra-hydrofurane complexes of the type ˙ nTHF (X = o-NO2, o-Cl, o-Br, m-Cl, p-Br, 2,4-dichloro, 2,6-dichloro and 2,4-dimethyl; n = 1,3,4 or 5) was synthesized by the reaction of anhydrous CoBr2 with t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c14bdbd75f1a344f60285d72162c9cb2
https://doi.org/10.1080/00945719408000111
https://doi.org/10.1080/00945719408000111
Autor:
Shaker L. Stefan
Publikováno v:
Monatshefte f�r Chemie Chemical Monthly. 125:859-867
Stability constants of complexes of aryl-bis-(5-hydroxy-3-methyl-1-phenyl-4-pyrazolyl) methane [ArBPyM] derivatives with thorium(IV) ions were determined by the potentiometric method at 30°C and an ionic strength of 0.1 mol·dm−3 (KNO3) in 75% (v/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b24c5f9c1b736bba8bad874a08cfe93b
https://doi.org/10.1007/bf00812699
https://doi.org/10.1007/bf00812699
Autor:
Shaker L. Stefan, Mostafa El-Behairy, Mohamed S. Abdel-Moez, B.A. El-Shetary, Mohamed M. Mashely
Publikováno v:
Canadian Journal of Chemistry. 68:774-781
The stepwise stability constants of VO(II), Mn(II), Cu(II), Ni (II), Co(II), Zn(II), Fe(III), and UO2(II) metal ions with 2-(2-acetylphenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dione (2-APHDm), 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fa78cda0af6dbef4c979acd990453b8
https://doi.org/10.1139/v90-122
https://doi.org/10.1139/v90-122
Autor:
Shaker L. Stefan
Publikováno v:
Microchemical Journal. 41:72-77
Acid dissociation constants (p K H ) of a series of five compounds (I to V) of substituted 5-pyrazolone dyes have been determined potentiometrically in 75% ( v v ) dioxane/water at 30 °C and M ionic strength. The stability constants of their 1:1 and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b171b0f9f7868e732e9e2a875002721c
https://doi.org/10.1016/0026-265x(90)90097-o
https://doi.org/10.1016/0026-265x(90)90097-o
Department of Chemistry, Faculty of Education. Ain Shams University. Roxy, Cairo, Egypt Manuscriptreceived 28 July 1988, revised22 October 1990, accepted 6 November 1990 Spectrophotometric Study on some Palladium(II) Hydrazopyrazolone Complexes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5572ca4e04c0c88fe438ae997d5b4f1c
