异三核过渡金属配合物[Fe2ⅢMⅡ O(OOCC2H5)6L3](M=Co,Ni,Mn;L=C5H5N,H2O)溶液行为的NMR和UV谱表征

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在合成和表征了一系列新的异核异价三核过渡金属羧酸配合物[Fe2IMIO)-(OOCC2H5)6L3](M=Co,Ni,Mn;L=C5H5N,H2O)的基础上,利用多种NMR技术并结合UV谱研究了这些配合物在不同溶剂介质和温度下的谱学特征和动力学性质.利用谱峰积分比例、线宽、相同骨架分子的配体取代和纵向弛豫时间对1H NMR谱进行了归属.实验结果表明:这类配合物的金属离子间通过中心氧桥存在一定的反铁磁相互作用,从而在整体上削弱了顺磁性的影响,仍能观察到NMR谱.实验还发现这些配合物在CD3CN和DMSO)溶剂中的结构与晶体结构一致,而在水中则分解为金属离子、羧酸盐和吡啶.这些结果有助于指导类似配合物的合成.
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