%0 Journal Article
%T Polarographic and Spectrophotometric Study of Lead Complexes with Diethanoldithiocarbamate
%A Marques
%A A.L.B.
%A Chierice
%A G.O.
%J Journal of the Brazilian Chemical Society
%D 1998
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50531998000600005
%X 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 (@ 3.0) and overall formation constant bmln (@ 4 x 1016), 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.
%K lead
%K dithiocarbamate complexes
%K spectrophotometry
%K polarography
%K potentiometry.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50531998000600005&lng=en&nrm=iso&tlng=en