caa a22 4500 465775632 CHVBK 20180323111941.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF01038379 doi (NATIONALLICENCE)springer-10.1007/BF01038379 Synthesis and properties of 7-formyl-8-hydroxyquinoline and its transition metal complexes [Elektronische Daten] [Ahmed El-Asmy, Adel El-Sonbati, Abdulla Ba-Issa, Mohamed Mounir] Summary: CoII, NiII, CuII, CdII and HgII complexes of 7-formyl-8-hydroxyquinoline (HFHQ) have been prepared, and characterized by elemental analysis, molar conductivities, electronic and i.r. spectra, and magnetic measurements. It was found that the ligand acts as a neutral monodentate or a monobasic bidentate donor. The CoII, NiII and CuII complexes possess, respectively, tetrahedral, octahedral and square-planar structures based on their magnetic and electronic spectral data. The electrical conductivities of HFHQ and its metal complexes were measured at different temperatures and their activation energies were calculated. The values obtained for the CoII, NiII, CdII and HgII complexes agree fairly well with those reported for semiconductors. The ligand was tested as a corrosion inhibitor for aluminium; the limiting concentration of HFHQ to give maximum efficiency (99.2%) is 10−3 mole dm−3 at 22°C. The metal-ligand ratios and apparent formation constants for the species generated in ethanol solution were determined spectrophotometrically. Chapman and Hall Ltd., 1990 El-Asmy Ahmed Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut El-Sonbati Adel Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut Ba-Issa Abdulla Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut Mounir Mohamed Physics Department, Faculty of Science, Sana'a University, Yemen AR aut Transition Metal Chemistry Kluwer Academic Publishers 15/3(1990-06-01), 222-225 0340-4285 15:3<222 1990 15 11243 https://doi.org/10.1007/BF01038379 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01038379 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- El-Asmy Ahmed Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut NATIONALLICENCE 700 1- El-Sonbati Adel Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut NATIONALLICENCE 700 1- Ba-Issa Abdulla Chemistry Department, Faculty of Science, Sana'a University, P.O. Box 11503, Sana's, Yemen AR aut NATIONALLICENCE 700 1- Mounir Mohamed Physics Department, Faculty of Science, Sana'a University, Yemen AR aut NATIONALLICENCE 773 0- Transition Metal Chemistry Kluwer Academic Publishers 15/3(1990-06-01), 222-225 0340-4285 15:3<222 1990 15 11243 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer