Influence of the Phosphonate Ligand on the Structure of Phosphonate‐Substituted Titanium Oxo Clusters
作者:Matthias Czakler、Christine Artner、Ulrich Schubert
DOI:10.1002/ejic.201300859
日期:2013.11.12
allyl or ethyl, dimeric clusters were formed in which two Ti4 cluster units are bridged by isopropyl phosphonate ligands. For comparison, Ti(OiPr)4 was also treated with allylphosphonic acid to yield a Ti4 cluster. The reaction of Ti(OiPr)4 with the bulky bis(trimethylsilyl) 2-naphthylmethyphosphonate did not yield an oxo cluster but instead the phosphonate-substituted titanium alkoxide Ti4(OiPr)8(O3PCH2naphthyl)4
异丙醇钛 Ti(OiPr)4 与双(三甲基甲硅烷基)膦酸酯反应生成了含有 Ti3O 单元 [= Ti3(μ3-O)(μ2-OiPr)3(OiPr)3(O3PR)3] 作为基本结构的结构结构主题。该单元可以由单个 Ti(OiPr)2L 基团(L = 中性配体)通过膦酸酯桥(对于 R = 二甲苯基)进行封端,或者可以形成夹心结构,其中两个 Ti3O 单元键合到一个中心 Ti 原子(对于R = CH2CH2CH2Cl 或苄基)。对于 R = 烯丙基或乙基,形成二聚体簇,其中两个 Ti4 簇单元由异丙基膦酸酯配体桥接。为了比较,还用烯丙基膦酸处理 Ti(OiPr)4 以产生 Ti4 簇。