Syntheses and structures of one Cu-I-containing coordination polymer and two macrocyclic supramolecular complexes based on flexible 1,3,4-oxadiazole-containing ligands

摘要

Three coordination complexes with Cu-I centres have been prepared using the symmetrical flexible organic ligands 1,3-bis{[5-(quinolin-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl}propane (L1) and 1,4-bis{[5-(quinolin-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl}butane (L2). Crystallization of L1 with Cu(SO3CF3)(2) and of L2 with Cu(BF4)(2) and Cu(ClO4)(2) in a CH2Cl2/CH3OH mixed-solvent system at room temperature afforded the coordination complexes catena-poly[[copper(I)-mu-1,3-bis{[5-(quinolin-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl}propane] methanesulfonate dichloromethane 0.6-solvate], {[Cu(C25H18N6O2S2)](CF3SO3)center dot 0.6CH(2)Cl(2)}(n), (I), bis(mu-1,4-bis{[5-(quinolin-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl} butane) dicopper(I) bis(tetrafluoridoborate)-dichloromethane-methanol (1/1.5/1), [Cu-2(C26H20N6-O2S2)(2)](BF4)(2)center dot 1.5CH(2)Cl(2)center dot CH3OH, (II), and bis(mu-1,4-bis{[5-(quinolin-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl}butane)dicopper(I) bis(perchlorate)-dichloromethane-methanol (1/2/1), [Cu-2(C26H20N6O2S2)(2)](ClO4)(2)center dot 2CH(2)Cl(2)center dot CH3OH, (III). Under the control of the dumbbell-shaped CF3SO3- anion, complex (I) forms a one-dimensional chain and neighbouring chains form a spiral double chain. Under the control of the regular tetrahedron-shaped BF4- and ClO4- anions, complexes (II) and (III) have been obtained as bimetallic rings, which further interact via pi-pi interactions to form two-dimensional networks. The anions play a decisive role in determining the arrangement of these discrete molecular complexes in the solid state.