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السجلات المعروضة 1 -- 10 من 12

Synthesis and characterization of nickel(II), cobalt(III) and iron(III) complexes of the schiff base 1-(2,3-dihydroxybenzylidene)thiosemicarbazone

Al-Kubaisi, A.H.; Nour, El-Metwally; Eltayeb M.A.-Z. ( Polskie Towarzystwo Chemiczne , 2004 , Article)

Ni(II), Co(III) and Fe(III) complexes of the Schiff base 1-(2,3-dihydroxybenzylidene)thiosemicarbazone (Hdhbtsc) have been prepared and characterized by elemental analysis, infrared spectra, thermal analysis, molar ...

Electronic, infrared, and Raman spectral studies of the reaction of iodine with 4-aminopyridine

AL-Hashimi, Nessreen A.; Hassan, Khadiga A.; Nour, El-Metwally ( Elsevier , 2005 , Article)

The reaction of iodine as an electron acceptor with the base 4-aminopyridine (4APY) has been investigated spectrophotometrically in chloroform at room temperature. The electronic absorptions, infrared and Raman spectra, ...

Synthesis and Spectroscopic Studies of the Charge‐Transfer Complexes of 2,3‐Diaminopyridine and π‐Electron Acceptors

Alqaradawi, Siham Y.; Nour, El-Metwally ( Taylor and Francis Ltd. , 2004 , Article)

The spectrophotometric properties of the charge transfer (CT)‐complexes formed between 2,3‐diaminopyridine (DAPY) and π‐acceptors tetrachloro‐p‐benzoquinone (chloranil) and tetracyanoethylene (TCNE) have been studied in ...

Synthesis and spectroscopic studies of metal complexes formed in the reaction of metal ions with urea at high temperature

Gaballa, Akmal S.; Teleb, Said M.; Nour, El-Metwally ( Korean Chemical Society , 2007 , Article)

Urea reacts with PtCl2, H2[PtCl6]·6H2O, H2[IrCl6] and Ni(CH3CO2)2 in aqueous solution at high temperature (60-80 °C) yielding [PtCl2(Urea)]·2H2O (1), (NH4)2[PtCl6] (2), (NH4)2[IrCl6]·H2O (3) and [Ni2(OH)2(NCO)2(H2O)2] (4) ...

Spectroscopic studies on the reaction of iodine with the mixed oxygen-nitrogen cyclic base 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8,8,8] hexacosane

Nour, El-Metwally; Teleb, Saeed M.; Barakat, Atiat E.; Nasr, Dsooky E. ( Chemical Publishing Co. , 2005 , Article)

The interaction of the mixed oxygen-nitrogen cyclic base, 4,7,13,16,21,24-hexaoxa-1,10- diazabicyclo[8,8,8] hexacosane (HODABCHC) with iodine as a s-acceptor has been studied spectrophotometrically at room temperature in ...

Preparation, spectroscopic and structural studies on charge-transfer complexes of 2,9-dimethyl-1,10-phenanthroline with some electron acceptors

Gaballa, Akmal S.; Wagner, Christoph; Teleb, Said M.; Nour, El-Metwally; Elmosallamy, M.A.F.; ... more authors ... less authors ( Elsevier , 2007 , Article)

Charge-transfer (CT) complexes formed in the reactions of 2,9-dimethyl-1,10-phenanthroline (Me2phen) with some acceptors such as chloranil (Chl), picric acid (HPA) and chloranilic acid (H2CA) have been studied in the defined ...

Synthesis, spectroscopic and thermal investigations of solid charge-transfer complexes of 1,4,7-trimethyl-1,4,7-triazacyclononane and the acceptors iodine, TCNE, TCNQ and chloranil

AlQaradawi, Siham Y.; Bazzi, Hassan S.; Mostafa, Adel; Nour, El-Metwally ( Elsevier , 2008 , Article)

The solid charge-transfer complexes formed in the reaction of the electron donor 1,4,7-trimethyl-1,4,7-triazacyclononane (TMTACN) with the acceptors iodine, tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane ...

Spectroscopic investigation of the donor-acceptor interaction between o-phenylenediamine and tetracyanoethylene in dichloromethane

Aljaber, Amina S.; Nour, El-Metwally ( Elsevier B. V. , 2007 , Article)

The interaction between the electron donor o-phenylenediamine (o-phendn) and the π-acceptor tetracyanoethylene (TCNE) has been investigated spectrophotometrically in dichloromethane at 25 °C. The results indicate that the ...

Synthesis, spectroscopic, thermal and structural investigations of charge-transfer complexes of 4,4′-trimethylenedipiperidine with chloranil, TBCHD, DDQ, TCNQ and iodine

Shahada, Lamis; Mostafa, Adel; Nour, El-Metwally; Bazzi, Hassan S. ( Elsevier , 2009 , Article)

The charge-transfer interactions between the electron donor 4,4′-trimethylenedipiperidine (TMDP) and the acceptors 2,3,5,6-tetrachloro-1,4-benzoquinone (chloranil), 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TBCHD), ...

Synthesis, spectroscopic and thermal studies of the reactions of the donors piperazine and N,N′-dimethylpiperazine with σ- and π-acceptors

Bazzi, Hassan S.; AlQaradawi, Siham Y.; Mostafa, Adel; Nour, El-Metwally ( Elsevier , 2008 , Article)

Abstract The interactions of the electron donors piperazine (PIP) and N,N′-dimethylpiperazine (DMPIP) with the σ-acceptor iodine and the π-acceptors tetracyanoethylene (TCNE) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone ...