| Conţinutul numărului revistei |
| Articolul precedent |
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 SM ISO690:2012SAMUSI, Nina, KHOROSHUN, I., GULYA, Aurelian, PELYAKH, M., TSAPKOV, Victor I.. Coordination Compounds of Lead with Certain Oxygen- and Nitrogen-containing Organic Ligands. In: Russian Journal of General Chemistry, 1998, vol. 68, pp. 1227-1230. ISSN 1070-3632. |
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  Russian Journal of General Chemistry |
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| Volumul 68 / 1998 / ISSN 1070-3632 /ISSNe 1608-3350 | ||||||
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| Pag. 1227-1230 | ||||||
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Lead acetate in a dimethylformamide-methanol solution reacts with salicylaldehyde semicarbazone (H2L) to give Pb(HL)2·3H2O. The reaction in the presence of ammonia (pH 8-9) results in isolation of the complex Pb(saln)2·2H2O (saln is salicylaldimine monoanion). Semicarbazide (Hsc) and salicylaldehyde (Hsal) react with lead acetate (molar ratio 2:1) in the presence of sodium hydroxide (pH 8) to give Pb(sc)2 and Pb(sal)2·2H2O, respectively. It was assumed that the Pb(HL)2·3H2O complex is monomeric and the other compounds involve polynuclear coordination units. Salicylaldimine, semicarbazide, and salicylaldehyde behave as bidentate ligands, and salicylaldehyde semicarbazone features tridentate coordination in the resulting intracomplex compounds. Thermolysis of the complexes involves the stages of dehydration (50-80°C) or deactivation (140-150°C) and complete degradation (330-480°C). |
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