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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 182, 2008 - Issue 10
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Original Articles

Spectrophotometric Study of Complexation of Tri-Aza Dibenzosulfide and Dibenzosulfoxide Macrocyclic Compounds with Heavy Metal Ions

Shahla Mozaffari Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
,
Marzieh Chaloosi Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
,
Faten Divsar Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
,
Ebrahim Abouzari-Lotf Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
,
Samad T Bavili Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
,
Ali Yousefi Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
&
Abbas Shockravi Faculty of Chemistry, Tarbiat Moallem University, Tehran, Iran
 show all
Pages 2439-2448 | Received 06 Jun 2006, Accepted 29 Aug 2006, Published online: 23 Aug 2007
 
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Abstract

The complexation reactions between 7,10,13-triaza-1-thia-4,16-dioxa-20,24-dimethyl-2,3;17,18-dibenzo-cyclooctadecane-6,14-dione ( TTD ) and 7,10,13-triaza-1-sulfoxo-4,16-dioxa-20,24-dimethyl-2,3;17,18-dibenzo-cyclooctadecane-6,14-dione ( TSD ) macrocycles with Ag+, Cd2+, Cu2+, Pb2+, Sr2+, Tl+, and Zn2+ ions have been studied in ethanol and methanol solutions at 25°C. The complexes formed between macrocycles ( TTD ) and ( TSD ) with these metals cations had a stiochiometry of 1:1 and 1:2, respectively. The stability constants of the resulting complexes were determined and found to decrease in the order Cu2+ > Zn2+ > Ag+ > Tl+ > Cd2+ > Pb2+ > Sr2+ with macrocycle ( TTD ) and Tl+ > Zn2+ > Cd2+ > Pb2+ > Cu2+ > Ag+ > Sr2+ with macrocycle ( TSD ).

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