Author/Authors :
Kedy, Souad Damascus university - Faculty of Science - Department of Chemistry, Syria , Almhna, Nadeem Damascus university - Faculty of Science - Department of Chemistry, Syria , Kandil, Farouk Damascus university - Faculty of Science - Department of Chemistry, Syria
Abstract :
Three new macrocyclic Schiff bases: (II) , ( IV) and (VI) containing nitrogen - oxygendonor atoms were synthesized by reaction of intermediate compounds: 1,4- bis(2-formylphenyl)- 1,4-dioxabutane (I) 1,4-bis(2-formylphenyl)-1,4,7-trioxaheptane (III) and 1,10-bis(2- formylphenyl)-1,4,7,10- tetraoxadecane (V) with oxydianiline. Identification of these macrocyclic Schiff bases: 1,12-diaza-(3,4;9,10-dibenzo)-13, 21-oxydianiline-5, 8-dioxacyclohenyacosine-1,11- diene(II),1,15-diaza-(3,4;12,13-dibenzo)-16,24-oxydianiline-5,8,11-trioxacyclo tetraacosine-1,14- diene(IV) and 1,18-diaza-(3,4;15,16-dibenzo)-19,27-oxydianiline-5,8,11,14- tetraoxacycloheptacosine-1,17-diene (VI) were determined by LC-MS, IR, ^13C-NMR and ^1H-NMR spectrometry. The liquid- liquid extraction of metal picrates such as Ag^+, Cu^2+ and Ni^2+ from aqueous phase to organic phase was carried out using these ligands. The effect of chloroform and dichloromethane as organic solvents over the metal picrate extractions was investigated at 25± 0.1°C by using atomic absorption spectrometer. The composition of extracted Ag^+ complex was (2:1) (L:M) and Cu^2+ complex was (1:1) (L:M) for the ligand (VI).
