Thioether group chelation

D. Chiral Lithium Amides with Chelating Thioether Groups. 390... 

Chelating Ligands with Thioether Groups and Other Donor Atoms 553... 

In a review of the stereochemistry of a-hydroxycarboxylate complexes, Tapscott includes the structural chemistry of complexes that contain ligands in which a sulfur atom is attached to a carbon a to a carboxylic group. This includes both a-mercapto and a-thioether groups. Lists of structural bonding parameters for a-thiocarboxylate complexes are given together with parameters for chelate rings. 

Protein labeled with iron chelate groups via thioether linkage... 

The cyanobromide (371) was condensed with the bc portion (347) to give the thioether (372) sulfide contraction to give (373) was accomplished using tris(/3-cyanoethyl) phosphine, and with phosphorus pentasulfide the thiolactam-thiolactone (374) was produced. After treatment with Meerwein s salt, reaction with dimethylamine opened the lactone with concomitant formation of an exocyclic methylene group, and subsequent treatment with cobalt chloride or iodide gave the chelate (375) which was reacted with diazabicyclononane to give bisnorcobyrinic add [Pg.435]

Dance and Guerney248 isolated a number of water-soluble complexes of (38) and X-ray analysis of a complex of Pb11 demonstrated its N—S coordination. The cyclic molecule 5-methyl-l-thia-5-azacyclooctane (39) forms complexes with Pd11 chloride and iodide in which it adopts a boat-chair configuration. These provide the first examples of bidentate chelates in which both thioether and tertiary amine groups are coordinated.132 H NMR analysis shows the inflexible chloride complex to remain bidentate in solution, whereas in the iodide chelate the ligand is S monodentate in dichloromethane. 

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