Synthesis and structure of pentacoordinated monoorganosilane derivatives of pyridine ligands
作者:Elizabeth Gómez、Vı&́ctor Santes、Verónica de la Luz、Norberto Farfán
DOI:10.1016/s0022-328x(00)00824-x
日期:2001.3
2,6-diethoxypyridine derivatives, additionally the X-ray diffraction study of 9a showed that in this compound the silicon atom adopts a square pyramidal geometry. Moreover, 1,3,10,12-tetraoxo-2,11-(dimethylsilylene)[5.5]paracyclophane (10) was synthesized from 1,4-benzenedimethanol and its structure established by X-ray crystallographic analysis showing that the aromatic rings are not perfectly eclipsed
2,6-二取代吡啶与双(二甲胺)二甲基硅烷,二氯苯基甲基硅烷和二氯二苯基硅烷的反应产生了单体硅烷:2,6-吡啶双(1,1-二-对-溴苯基甲氧基)二甲基硅烷(9a),2,6-吡啶双(1,1-二- p -叔-butylphenylmethoxy)二甲基硅烷(图9b),2,6- pyridinebis(1,1-二苯基乙氧基)甲基苯基硅烷(12A)和2,6- pyridinebis(1,1- adamantylethoxy)二苯基硅烷(12B)。这些化合物的29 Si-NMR数据证实了N→Si键的存在以及12a和12b的可变温度NMR研究结果表明,存在2,6-二乙氧基吡啶衍生物的流变行为。另外,对9a的X射线衍射研究表明,在该化合物中,硅原子采用方锥几何形状。此外,由1,4-苯二甲醇合成了1,3,10,12-四氧代-2,11-(二甲基亚甲硅烷基)[5.5]对环烷(10),并通过X射线晶体分析确定了其结构,表明芳环是没有完全黯然失色。