Novel silver(I)–saccharinate complexes exhibiting Ag···π and C–H···Ag close interactions with a new coordination mode of saccharinate

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• 作者：Okan Zafer Yeş ; ilel^a ; ^{yesilel@ogu.edu.tr} ; Gü ; neş ; Gü ; nay^a ; Orhan Bü ; yü ; kgü ; ngö ; r^b
• 关键词：Saccharinate complexes ; Silver(I) complexes ; Ag&#xb7 ; &#xb7 ; &#xb7 ; C interaction ; C– ; H&#xb7 ; &#xb7 ; &#xb7 ; Ag interaction
• 刊名：Polyhedron
• 出版年：2011
• 出版时间：1 February 2011
• 年：2011
• 卷：30
• 期：2
• 页码：364-371
• 全文大小：898 K

文摘

Two novel silver(I) complexes, namely [Ag₂(μ₃-sac)₂(μ-nmpen)]_n (1) and [Ag(sac)(mpr)]₂ (2) (sac = saccharinate; nmpen = N-methyl-1,3-propanediamine; mpr = 2-methyl-1-pyrroline) have been synthesized and characterized by IR spectra, thermal (TG, DTG and DTA) analysis and single crystal X-ray diffraction techniques. Complexes crystallize in the monoclinic system with the space group C2/c and P2₁/c, respectively. In 1, Ag(I) ion exhibits a distorted tetrahedral geometry by tridentate μ₃-bridging sac and μ₂-bridging nmpen ligands. The sac ligand exhibits a new μ₃-coordination mode by means of μ₂-bridging O atom of sulfonyl group and N atom of imino group. Furthermore, complex 1 exhibits a two-dimensional polynuclear structure. In 2, the silver(I) ion is linearly coordinated by the N atoms of a sac and a mpr ligands, forming mononuclear species. The individual molecules are linked into dimers by Ag···C_sac (b7;¹) interactions between silver(I) ion and phenyl ring of the adjacent complex and these dimers are assembled into two-dimensional layered networks through weak Ag···Ag (3.507 Å), SO···Ag (2.961 Å) and π···π interactions. The most interesting structural features of complexes is the presence of obvious C–H···M hydrogen-bonding interactions between the Ag centers and H atoms of nmpen or mpr ligands.