【摘要】 <正> 丁二肟镍在分析化学中有重要作用,因此它和与它相应的化合物一直是光谱研究的对象。但以前的工作着重于晶体光谱的研究,丁二肟镍溶液的光谱研究也只限于三氯甲烷溶液。我们配制了丁二肟镍的四氯化碳、三氯甲烷、四氢呋喃、丙酮、乙醇等不同极性的溶液,测定了它们的紫外、可见及近红外光谱,对其特征吸收与溶液中状态的相互关系进行了初步探讨。更多还原

【Abstract】 Ultraviolet, visible and near-infrared absorption spectra of Ni（dmg）₂ in a series of different polar solutions are investigated.The d-orbitals of Ni²⁺ in solid Ni（dmg）₂ are split by octahedral field. After being resolved,the Ni（dmg）₂ spreads in single molecular form,and the d-orbitals of the central Ni ion are rearranged by tetragonal field. The major reason of solving Ni（dmg）₂ is the Van Der Waals force between nickel and electronegative hetero-atoms （Cl, O etc.） of weak polar solvent. Assignment of the absorption band at ～205nm is also disscused.更多还原