NOVEL CYCLIC PENTACOORDINATE AND PSEUDOPENTACOORDINATE LEAD COMPOUNDS
作者:V. Chandrasekhar、A. Chandrasekaran、Roberta O. Day、Joan M. Holmes、Robert R. Holmes
DOI:10.1080/10426509608037960
日期:1996.8.1
new bicyclic lead(II) phosphinate [(t-Bu)2PO2]2Pb (1) was synthesized by the reaction of p-tolyllead triacetate with di-t-butylphosphinic acid and water. An X-ray study showed that it had a pseudo-trigonal bipyramidal geometry (p-TBP) with a stereochemically active lonepair of electrons occupying an equatorial site. Infrared data ruled out the possible presence of a Pb[sbnd]H bond. A series of new
摘要 通过对甲苯基三乙酸铅与二叔丁基次膦酸和水反应,合成了新型双环次膦酸铅[(t-Bu)2PO2]2Pb (1)。X 射线研究表明,它具有伪三角双锥几何 (p-TBP),其中一个立体化学活性孤对电子占据赤道位置。红外数据排除了 Pb[sbnd]H 键的可能存在。一系列新的单环 Pb(IV) 化合物,[Et4N][(MeC6H3S2)PbPh2X],其中 X = Br (2)、Cl (3) 和 F (4),由四乙基卤化铵与 2 的加成反应合成,2-二苯基-1,3,2-甲苯二硫醇铅(IV), (MeC6H3S2)PbPh2 (5)。对 3 的 X 射线研究揭示了单环阴离子 TBP 几何结构,将其与早期由 IVA 族较轻元素形成的相关二硫醇环结构进行比较。