已经制备了许多钯(II)和铂(II)双螯合物,它们含有一种对称或不对称的β-二酮阴离子,或包含两种不同的β-二酮阴离子。顺式和反式异构体在不对称 β-二酮二元螯合物的溶液中的存在通过 1H 和 13C NMR 光谱证实。钯 (II) 配合物在溶液中达到平衡的几何异构化速度很快,而铂 (II) 配合物非常惰性。混合配体螯合物在溶液中稳定,没有歧化迹象。双(1-苯基-1,3-丁二酮)钯(II)、双(2,4-己二酮)钯(II)和双(1,1,1-三氟-2,4-戊二酮)的异构体对) 铂 (II) 被分离出来,第一个复合物的顺式异构体的分子结构通过 X 射线分析确定。
Reactions of<i>trans</i>- and<i>cis</i>-Dichlorobis(benzonitrile)platinum(II) with Acetylacetonate and Benzoylacetonate Carbanions. Formation of<i>N</i>-Acetyl β-Ketoamine Complexes by the Acetyl Group Migration
ile) platinum(II) reacted with twice the molar amount of thallium(I) acetylacetonate and benzoylacetonate in dichloromethane at room temperature to afford mainly N-acetyl β-ketoamine chelates, trans-[PtN(COMe)=C(Ph)CH=COMe(and Ph)}2] (1a and 3a). This N,O-chelate structure of 1a was determined by X-ray analysis. Reactions of cis-[PtCl2(PhCN)2] gave C-acetyl and C-benzoyl β-ketoamine chelates, cis