title: 1,1'-[(Ethane-1,2-diyldioxy)di-o-phenylene]bis(indoline-2,3-dione) (L) and a novel [Ag2L2]2+ metallocycle based on coordination-driven Ag-O and Ag-π bonds.
abstract: 1,1'-[(Ethane-1,2-diyldioxy)di-o-phenylene]bis(indoline-2,3-dione), C(32)H(24)N(2)O(6), L or (I), adopts a trans conformation with the two terminal indoline-2,3-dione groups located on opposite sides of the central ether bridge, as required by a centre of inversion located at the mid-point of the ethane C-C bond. However, in the discrete binuclear Ag(I) metallocycle complex salt bis{μ-1,1'-[(ethane-1,2-diyldioxy)di-o-phenylene]bis(indoline-2,3-dione)}disilver(I) bis(hexafluoridoantimonate), [Ag(2)(C(32)H(24)N(2)O(6))(2)][SbF(6)](2), (II), synthesized by combination of L with AgSbF(6), L adopts a gauche conformation to bind Ag(I) via the two indolinedione O atoms and two C atoms from the phenoxy ring. One dione O atom from the opposite side of the ether bridge completes the irregular coordination environment of each Ag(I) atom. The complex is on a centre of inversion located between the Ag(I) atoms. In the solid state, these binuclear [Ag(2)L(2)](2+) metallocycles stack together via intermolecular π-π interactions to generate a one-dimensional chain motif, with the [SbF(6)](-) counter-ions, which are disordered, located between the chains.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Engineering Research Center of Pesticide and Medicine Intermediate Clean Production, Ministry of Education, Shandong Normal University, Jinan, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Fang
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Ma
authors.forename: Sui
authors.initials: S
authors.lastname: Wei
authors.forename: Yu-Bin
authors.initials: YB
authors.lastname: Dong
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007211:Indoles / Q000737:chemistry*; D008024:Ligands; D008968:Molecular Conformation; D015394:Molecular Structure; D012834:Silver / Q000737:chemistry*
chemical_list: C556961:1,1'-((ethane-1,2-diyldioxy)di-o-phenylene)bis(indoline-2,3-dione); D007211:Indoles; D008024:Ligands; D012834:Silver