Synthesis and crystal structures of S2O2-donor macrocycles and their silver(I) metallopolymers
作者:Ki-Min Park、Il Yoon、Yoon Hee Lee、Shim Sung Lee
DOI:10.1016/s0020-1693(02)01237-9
日期:2003.1
The S2O2-donor macrocycles L-1 and L-2 (L-1 = 5,8-dioxa-2,1 1-dithia[12]-m-cyclophane; L-2 = 5,8-dioxa-2,11-dithia[121-p-cyclophane) based on a xylyl subunit were synthesized by a mercaptan-halide coupling reaction under high dilution conditions. The crystal structures of the closely related macrocycles, L-1 and L-2, are found to be entirely different with respect to the orientation of the donor atoms and torsion angles. The reaction of the macrocycles with silver(I) salts have resulted in the isolation of silver(I) metallopolymers. The complex [Ag-3(L-1)(2)(NO3)(2)](n)(PF6)(n) (1) displays a bridging of two unique endo-cyclic Ag(I) complexes by the third Ag atom in an exo-manner. The complex [Ag(L-2)](n)(PF6)(n) (2) forms a zigzag one-dimensional polymer chain of alternating Ag atoms and L-2. The structural features of the ligands and complexes suggest that the difference of rigidity due to the xylyl fragments, which were added in different substitution positions, contribute significantly to the conformations of the silver(I) metallopolymers. (C) 2002 Elsevier Science B.V. All rights reserved.