Dioxouranium(VI) complexes with 2,6-acetylpyridinebenzoylhydrazones and -semicarbazones
作者:C.C. Gatto、E. Schulz Lang、A. Jagst、U. Abram
DOI:10.1016/j.ica.2004.07.011
日期:2004.12
3 )] show relatively short U–O bonds to the benzoylic oxygen atoms between 2.273(6) and 2.368(5) A. This suggests a preference of these donor sites of the ligands over their imino and amine functionalities (U–N bond lengths: 2.502(7)–2.671(7) A). The addition of a sixth ligand to the equatorial coordination sphere results in a lengthening of the metal–pyridine bonds.
摘要衍生自2,6-二乙酰基吡啶的苯甲酰肼和半咔唑与硝酸铀酰或[NBu 4] 2 [UO 2 Cl 4]等常见的二氧杂鎓(VI)化合物反应形成空气稳定的络合物。2,6-二乙酰基吡啶双(苯甲酰))(H 2 L 1),2,6-二乙酰基吡啶双(N4-苯基半碳巴zone)(H 2 L 2)和不对称配体2,2,6-二乙酰吡啶(苯甲酰hydr)(N4-苯基半碳a)(H 2 L 3)得到黄色产物[UO 2(L)]。中性化合物含有双重去质子化的配体,并具有带有扭曲的五边形-双锥体配位球的铀原子。金属原子的赤道配位球可通过添加单齿配体(例如吡啶或DMSO)来扩展。所得络合物中的铀原子具有六角-双锥体配位环境,且轴向位置带有氧代配体。[UO 2(L 1)(DMSO)],[UO 2(L 2)],[UO 2(L 2)(DMSO)]和[UO 2(L 3)]的X射线衍射研究显示相对较短U–O与2.273(6)和2.36