The syntheses and characterization of uranyl complexes containing the OP(Se)(OEt)₂⁻ or OP(Te)(OEt)₂⁻ ligands are described. The U(VI) complexes UO₂(OP(Se)(OEt)₂)₂(OP(NMe₂)₃)₂ (1) and UO₂(OP(Te)(OEt)₂)₂(OP(NMe₂)₃)₂ (4) were prepared by the reaction of UO₂(NO₃)₂(OP(NMe₂)₃)₂ with the corresponding NaOP(E)(OEt)₂ salt in THF (E=Se, Te). The complexes UO₂(OP(Se)(OEt)₂)₂(OPPh₃)₂ (2) and UO₂(OP(Se)(OEt)₂)₂₍(OAsPh₃)(HOMe) (3) were prepared by the reaction of [UO₂Cl₂(THF)₂]₂ with NaOP(Se)(OEt)₂ in THF solution in the presence of OPPh₃ (2) or OAsPh₃ (3) and recrystallised from THF (2) and HOMe (3) respectively. Although the OP(E)(OEt)₂⁻ (E=Se, Te) ligands may be able to act as bidentate chelate ligands, evidence for the weak coordination of the Se atom to the uranium(VI) centre was only observed in complexes 2 and 3. No coordination of the Te atom to the U(VI) centre in complex 4 was observed. Complexes 2–3 were characterized using vibrational (IR, Raman) spectroscopy. In addition, the structures of compounds 1–4 were determined using single crystal X‐ray diffraction techniques: Compounds 2 and 3 are examples of structurally characterized compounds containing significant U(VI)−Se interactions.

中文翻译：

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含硒或碲螯合配体的铀酰配合物

的合成和含有OP（SE）（OET）铀酰复合物的表征₂ ^-或OP（TE）（OET）₂ ^-配体进行说明。U（VI）络合物UO ₂（OP（Se）（OEt）₂）₂（OP（NMe ₂）₃）₂ （1）和UO ₂（OP（Te）（OEt）₂）₂（OP（NMe ₂）₃）₂ （4）由UO ₂（NO ₃）₂（OP（NMe ₂）₃）_{2反应制得}用相应的NaOP（E）（OEt）₂在THF中的盐（E = Se，Te）。制备了UO ₂（OP（Se）（OEt）₂）₂（OPPh ₃）₂ （2）和UO ₂（OP（Se）（OEt）₂）_2（（OAsPh ₃）（HOMe）（3）的配合物在OPPh ₃ （2）或OAsPh ₃ （3）存在下，[UO ₂ Cl ₂（THF）₂ ] ₂与NaOP（Se）（OEt）₂在THF溶液中反应，然后从THF （2）中重结晶 和HOMe （3）。虽然OP（E）（OET）₂ ^-（E =硒，碲）的配体可以是能够作为双齿螯合物配体，硒原子的到铀（VI）中间的弱配位的证据仅在复合物观察2和3。没有观察到配合物4中Te原子与U（VI）中心的配位。使用振动（红外光谱，拉曼光谱）对2 – 3号配合物进行表征。另外，化合物的结构1 - 4化合物：用单晶X射线衍射技术测定2和3 是具有显着U（VI）-Se相互作用的结构特征化合物的实例。