Biphenolate Phosphine Complexes of Tin(IV)

The preparation and structural characterization of tin(IV) complexes supported by (2,2‘-phenylphosphino)bis(4,6-di-tert-butylphenolate) ([OPO]2-) are described. The reaction of in-situ prepared Li2[OPO] with SnCl4 in THF at
−35 °C produced [OPO]SnCl2(THF) as a THF adduct. Addition of SnCl4 to a THF solution of H2[OPO] in the
presence of 2 equiv of NEt3 at room temperature led to the formation of the “ate” complex {[OPO]SnCl3}(HNEt3).
The metathetical reactions of Li2[OPO] with R2SnCl2 (R = Me, n-Bu) in THF at −35 °C generated the corresponding
five-coordinate dialkyl complexes [OPO]SnR2. In addition to the multinuclear NMR spectroscopic data for all new
compounds, X-ray structures of [OPO]SnCl2(THF), [OPO]SnMe2, and [OPO]Sn(n-Bu)2 are presented.

本篇论文详细阐述了以(2,2'-联苯基膦基)双(4,6-二叔丁基苯氧基)盐([OPO]2-)为配体的锡(IV)配合物的制备及其结构表征。在−35°C下，将现场制备的Li2[OPO]与SnCl4在THF溶剂中反应，生成了THF加合物[OPO]SnCl2(THF)。在室温下，向含有2当量NEt3的THF溶液中加入SnCl4，并在H2[OPO]的存在下，形成了“酸盐”型配合物{[OPO]SnCl3}(HNEt3)。在−35°C的THF溶剂中，Li2[OPO]与R2SnCl2（R = Me, n-Bu）的互变异构反应生成了相应的五配位双烷基配合物[OPO]SnR2。除了所有新化合物的多核核磁共振光谱数据外，还展示了[OPO]SnCl2(THF)、[OPO]SnMe2和[OPO]Sn(n-Bu)2的X射线晶体结构。