851075-03-1Relevant academic research and scientific papers
Structural insights into the coordination and extraction of Pb(II) by disulfonamide ligands derived from o-phenylenediamine
Alvarado, Robert J.,Rosenberg, Jay M.,Andreu, Aileen,Bryan, Jeffrey C.,Chen, Wei-Zhong,Ren, Tong,Kavallieratos, Konstantinos
, p. 7951 - 7959 (2005)
The o-phenylenediamine-derived disulfonamide ligands 1 and 2 complex and efficiently extract Pb(II) from water into 1,2-dichloroethane via ion-exchange, in combination with 2,2′-bipyridine (97.5% and 95.0%, respectively, for 1:1 ligand-to-Pb ratios). The
Pb(II) coordination and synergistic ion-exchange extraction by combinations of sulfonamide chelates and 2,2′-bipyridine
Kavallieratos, Konstantinos,Rosenberg, Jay M.,Bryan, Jeffrey C.
, p. 2573 - 2575 (2005)
The disulfonamide ligands 1,2-C6H4(NH 2SO2C6H5)2 (1) and 1,2-C6H4(NH2SO2C6H 4-p-But)2 (2), which are readily available in good yields from o-phenylenediamine and the corresponding sulfonyl chlorides, efficiently extract Pb(II) from water into 1,2-dichloroethane when used in synergistic combinations with 2,2′-bipyridine via an ion-exchange mechanism. The extraction was shown to proceed via the formation of a ternary Pb-sulfamido-2,2′-bipyridine complex. The X-ray crystal structure of the binary Pb-sulfamido complex 3 shows a coordination polymer with a stereochemically active lone pair on Pb formed by S=O-Pb axial coordination.
