Journal
INORGANIC CHEMISTRY
Volume 44, Issue 8, Pages 2573-2575Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic050047r
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Funding
- NIEHS NIH HHS [S11 ES011181] Funding Source: Medline
- NIGMS NIH HHS [R25 GM061347] Funding Source: Medline
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The disulfonamide ligands 1,2-C6H4(NH2SO2C6H5)(2) (1) and 1,2-C6H4(NH2SO2C6H4-p-Bu')(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.
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