Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate
Experimental and theoretical aspects concerning the behaviour of lead-dietanoldithiocarbamate complexes in aqueous solutions were studied. The reaction occurs through complexation and formation of a yellow precipitate, which is soluble in ligand excess and in some polar solvents. The results from el...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
1998-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000600005 |
| _version_ | 1818013608217411584 |
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| author | Marques A.L.B. Chierice G.O. |
| author_facet | Marques A.L.B. Chierice G.O. |
| author_sort | Marques A.L.B. |
| collection | DOAJ |
| description | Experimental and theoretical aspects concerning the behaviour of lead-dietanoldithiocarbamate complexes in aqueous solutions were studied. The reaction occurs through complexation and formation of a yellow precipitate, which is soluble in ligand excess and in some polar solvents. The results from elementary and gravimetric analyses show a stoichiometric relationship of 1:2 (Pb(II): DEDC). Some ambiguous interpretations have been clarified on the application in this system of Lingane?s equation. Polarographic measurements were used to determine the coordination number (<FONT FACE=Symbol>@</FONT> 3.0) and overall formation constant betaMLn (<FONT FACE=Symbol>@</FONT> 4 x 10(16)), of the lead complexes with ammonium diethanoldithiocarbamate, which show a good agreement with previous potentiometric results for the same system. A kinetic-spectrophotometric study was carried out in order to establish the decomposition of these complexes in acid medium. |
| first_indexed | 2024-04-14T06:35:21Z |
| format | Article |
| id | doaj.art-462e43d8fea74ffaa3d632db1fae436b |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-04-14T06:35:21Z |
| publishDate | 1998-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-462e43d8fea74ffaa3d632db1fae436b2022-12-22T02:07:29ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50531998-01-0196531538Polarographic and Spectrophotometric Study of Lead Complexes with DiethanoldithiocarbamateMarques A.L.B.Chierice G.O.Experimental and theoretical aspects concerning the behaviour of lead-dietanoldithiocarbamate complexes in aqueous solutions were studied. The reaction occurs through complexation and formation of a yellow precipitate, which is soluble in ligand excess and in some polar solvents. The results from elementary and gravimetric analyses show a stoichiometric relationship of 1:2 (Pb(II): DEDC). Some ambiguous interpretations have been clarified on the application in this system of Lingane?s equation. Polarographic measurements were used to determine the coordination number (<FONT FACE=Symbol>@</FONT> 3.0) and overall formation constant betaMLn (<FONT FACE=Symbol>@</FONT> 4 x 10(16)), of the lead complexes with ammonium diethanoldithiocarbamate, which show a good agreement with previous potentiometric results for the same system. A kinetic-spectrophotometric study was carried out in order to establish the decomposition of these complexes in acid medium.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000600005leaddithiocarbamate complexesspectrophotometrypolarographypotentiometry |
| spellingShingle | Marques A.L.B. Chierice G.O. Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate Journal of the Brazilian Chemical Society lead dithiocarbamate complexes spectrophotometry polarography potentiometry |
| title | Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate |
| title_full | Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate |
| title_fullStr | Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate |
| title_full_unstemmed | Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate |
| title_short | Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate |
| title_sort | polarographic and spectrophotometric study of lead complexes with diethanoldithiocarbamate |
| topic | lead dithiocarbamate complexes spectrophotometry polarography potentiometry |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000600005 |
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