Pb(II) coordination and synergistic ion-exchange extraction by combinations of sulfonamide chelates and 2,2'-bipyridine.

Pb(II) coordination and synergistic ion-exchange extraction by combinations of sulfonamide chelates and 2,2'-bipyridine.
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DOI:
10.1021/ic050047r
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发表时间:
2005-03
影响因子:
4.6
通讯作者:
K. Kavallieratos;Jay M. Rosenberg;J. Bryan
K. Kavallieratos;Jay M. Rosenberg;J. Bryan
中科院分区:
化学2区
文献类型:
--
作者:
K. Kavallieratos;Jay M. Rosenberg;J. Bryan

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二磺酰胺配体1,2-C(6)H(4)(NH(2)SO(2)C(6)H(5))(2)(1)和1,2-C(6)H(4)(NH(2)SO(2)C(6)H(4)-p-Bu(t))(2)(2),其易于从邻苯二胺和相应的磺酰氯以良好的产率获得,有效地将Pb(II)从水中萃取成1,当通过离子交换机制与2,2 '-联吡啶协同组合使用时,2-二氯乙烷。结果表明,萃取是通过形成三元Pb-磺酰胺基-2,2 '-联吡啶络合物进行的。X-射线晶体结构表明,配合物3是一个在Pb上通过S=O-Pb轴向配位形成的具有立体化学活性的孤对电子的配位聚合物。
The disulfonamide ligands 1,2-C(6)H(4)(NH(2)SO(2)C(6)H(5))(2) (1) and 1,2-C(6)H(4)(NH(2)SO(2)C(6)H(4)-p-Bu(t))(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.