Crown ether compounds of actinide bis(β-diketonate). Synthesis, characterization and molecular structures of [UO2(TTA)2H2O]2(benzo-15,crown-5) (1) and [UO2(TTA)2(μ-H2O)]2(H2O)2(dibenzo-18,crown-6) (2)
摘要:
Reaction of [UO2(TTA)(2)2H(2)O] with benzo-15,crown-5 in chloroform yielded the compound [UO2(TTA)(2)H2O](2)(benzo-15,crown-5) (1) in which the benzo-15,crown-5 ether acts as a second sphere ligand. However, similar reaction with dibenzo-18,crown-6 yielded the compound [UO2(TTA)(2)(mu -H2O)](2)(H2O)(2)(dibenzo-18,crown-6) (2) in which the dibenzo-18,crown-6 ether acts as a third sphere ligand. The solid state structure of I shows that the crown ether bridges two mononuclear [UO2(TTA)(2)H2O] by hydrogen bonds to give binuclear complex [UO2(TTA)(2)H2O](2)crown. Two of such binuclear units are stabilized by C-(HO)-O-... interactions in the solid state. The structure of 2 shows that the crown ether bridges two binuclear [UO2(TTA)(2)(mu -H2O)](2)(H2O)(2) by hydrogen bonds along the c-axis direction to give linear polymeric chain-like arrangement. (C) 2001 Elsevier Science Ltd. All rights reserved.