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)

Add time:07/19/2019    Source:sciencedirect.com

Reaction of [UO2(TTA)22H2O] with benzo-15,crown-5 in chloroform yielded the compound [UO2(TTA)2H2O]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(μ-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 1 shows that the crown ether bridges two mononuclear [UO2(TTA)2H2O] by hydrogen bonds to give binuclear complex [UO2(TTA)2H2O]2crown. Two of such binuclear units are stabilized by C&0xF700;H⋯O interactions in the solid state. The structure of 2 shows that the crown ether bridges two binuclear [UO2(TTA)2(μ-H2O)]2(H2O)2 by hydrogen bonds along the c-axis direction to give linear polymeric chain-like arrangement.

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